Diagrams and service instructions for disassembly for Sony TVs
TV SONY KV-M2530. The TV receives and stores any programs on the first channel only. When switching channels, TV pauses for a second on the selected channel, and then returns back to the first channel. Tuner here with frequency synthesizer, SDA20560 tuning processor, SDA2546 memory. All with IC bus control. Unfortunately, the LED on the front panel in this TV model has not yet been taught how to blink, so I had to figure it out without prompting. The memory chip (SDA2546) turned out to be faulty
TV SONY KV-21X5D. Imported from Germany. It turned out to have a super-sophisticated sound channel. The TDA9817 microcircuit (radio channel) has a non-standard switching circuit. PChZ output. 12 leg. Farther from the gap, it hits the cool TDA9870A sound processor (it has more legs than the video and control processor). After installing the 6.5 X 5.5 converter into the track gap after the 12th leg, the TDA9817 works fine. The difficulty is that the usual filter that highlights the second gap
Sony 2540 after several years of operation (usually 2 years). The external manifestation of the defect is diverse: with warming up, loss of gain, color, image, picture twitching, dark raster, gray field, spontaneous transition to Stand by mode. The reason was the channel selector. Structurally, the SCV is made in such a way that its internal screen partitions are simultaneously current-carrying circuit elements, supplying ground to some points of the printed circuit board. Over time, the places of the rations of these sealed partitions will collapse and periodic non-contact occurs. It is possible to visually identify the defect using a magnifying glass. Considering that the external manifestation of the defect completely confuses the table, with the complex circuitry of the apparatus, as well as the high cost of parts, and the fact that these models are not worth repairing in stacks, it turned out to be not easy to identify the disease
SONY 29E1, S2951: white horizontal lines 2-3 cm wide running at intervals of 5-6 cm from top to bottom along the right edge of the screen. over, the defect is observed only in the 100 Hz mode, when switching to the 50 Hz mode, the effect disappears. The picture becomes OK. I have had three cases in 2 years. I never figured out the first one (I left the battlefield with nothing). And on the second one I already understood what was the matter. The memory chip CXK48324R, position number IC04, on the digital video signal processing board is out of order
Sony TV (M1 for example) released last 2-3 years. After a certain operating time, for no reason, the screen fills with one of the primary colors, after which the current protection is triggered and the TV goes into standby mode. The crux of the matter: at the vaunted Trinitron CRT, the filament sags over time and shortens to one of the modulators. (This happens only in a heated state) The way out is very simple. to tear the filament off the ground. The performance is fully restored, the picture quality is almost always satisfactory.
SONY 25KV40. If after turning on STAN BY the LED starts blinking repeatedly, you need to turn off the power by simultaneously pressing. programm. After that, turn on the TV according to the service documentation
SONY TV works, but after a while it turns off and turns on immediately. When analyzing the malfunction, we find that the line pulse from the processor disappears. But there is no need to rush to change the processor, it has nothing to do with it. Quartz needs to be changed. This defect occurs in models: KV-2192 M3 / RM687 B KV-2565 MTJ / RM-827 S and the like with the CXA1213 processor. Quartz 500 KHz
SONY KV1420K (Monoblock) Periodically spontaneously switches the 6.5 MHz sound system to the 5.5 MHz system. The defect is very common. The fault is located in module 1-693-232-11, ENH-19708. Non-propane contours and quartz. The defect is found only in devices assembled in Malaysia. Someone else will argue that the yellow assembly is no different from the white one. I advise you to solder everything in this module
SONY 2540KV. After soldering the tuner, the LED on the front panel stopped showing the tuner malfunction. However, there was no image on all channels, the frame was shifted, which, when displaying the channel number, led to the output of only tens, there was sound, the TV went to the menu normally. On the recommendation of a friend, I rewrote the non-volatile memory according to the algorithm: 1) in the operating mode, switch to channel 59; 2) switch TV to standby mode; 3) disconnect the TV from the network, wait until the LED goes out and then plug into the outlet again; 4) sequentially and at a pace, press the remote control buttons?, 5, vol, on TV (square). this is to go to the service mode; 5) sequentially press buttons 4, 1, 1, 5; 6) switch TV to standby mode; 7) turn off TV with the button on the front panel
When repairing the tuner, in addition to soldering the choke, I recommend soldering the quartz resonator and the legs of the tuner itself (inside it). The same applies to Sony 2509, 2171 and others where a tuner made in Spain is installed.
Sony 25M1. External manifestations of malfunction TDKS 859898800: increased dimensions in H and V, kinks along the edge of the raster
Sony 2981. After soldering the tuner, about a month later, a malfunction occurred, the external manifestation of which is as follows: there is no image in the right half of the screen, at some moments the width of the image on the left side of the screen decreases to 10-15 cm. The raster is normal, there is no distortion in the visible part of the image. I suspected a malfunction on board A, but it worked fine on another TV. By the way, it can be checked on models 2540 and 25M1 without any changes in board A, only it is better to turn down the volume to zero in advance. The malfunction turned out to be in the HFBP signal (OX pulses from the horizontal scan) passing through the H Dumper D800 D801 circuit to ensure the steepness of the pulse edges. The D800 does not switch well, resulting in a flatter edge. In other Sony TVs with a diagonal of 25, 29, the scheme for obtaining HFBP is the same, but they did not have a similar malfunction
SONY M2155 Fault: already the 4th TV this year. There is no color in the PAL system (SECAM is running normally) Reason: non-drip of variable capacity and quartz (change capacity, otherwise there will be repetitions) through the PAL system near the video processor
S0NY KV-C2961K. Does not turn on. Replace the 220mkF50V capacitor in the power supply unit
Classic case with TV SONY KV-X2961 It does not turn on, the LEDs on the front panel flash: A-1 times, then B-13 times and everything repeats. I did not find a service instruction for it anywhere (on the network, too). In most of your service links, 13 blinks are a frame failure, and so it turned out. the infamous ring cracks around the legs of the personnel IMS (almost invisible to the naked eye). Turned on after soldering, the following defect creeps out: the OSD and teletext are completely out of sync horizontally, vertically compressed by about a quarter, the main image and OSD are completely normal, well, I think they came: ((I take off the board V, on it under the screen of the SIEMENS chip. and so on and a familiar detail immediately catches the eye.variable capacitor, in appearance the same as the one that causes troubles in other SONY models. with chromaticity in the PAL system. I drip on it with alcohol and turn it several times and that’s it. the synchronization is restored, the menu and teletext readable.It’s even a shame, a famous company, amazing build and soldering quality, and such little things are even worse than domestic ones: ((
If in a SONY 2540 TV and the like, after the tuner is soldered, the LED continues to flash 13 times, it is necessary to replace the TDA5512 microcircuit (it costs about 1.5).
A complete methodology for setting up Sony TVs, from mixing to the service menu SONY KV-M2540 When turned on from the attendant, it reacts to the remote control or buttons on the panel only until the image appears, after which nothing is controlled and the service information freezes (channel number or the scale of any adjustments if the adjustments were pressed before the image appeared), the image and sound are normal. I thought that the percent (TDA8366) of management, but someone in the conference (praise him) said that the resistor assemblies (4 rezyukas each) were moping around the core, but the defect manifested itself differently. I measured these assemblies without soldering, it turned out that in one short man between the cuts, and in the second deviation from the nominal value, he dropped them and again measured everything is normal, despite the fact that the places where the assemblies stood for resistance are not measured! I soldered them back (just in case, turning them over) and everything worked
SONY KV-2153MT. When the TV is turned on, a weak squeak is heard from the power supply. Secondary short-circuit protection has tripped. The avalanche diode D657 R2K is out of order. The reason for the failure of the diode is the overestimated output voltage from the power supply. In the power supply, the capacity of the C611 47mk 50 volts has dried up. Drying is facilitated by the resistance of R608 7W, which is installed in close proximity to the electrolyte. I advise you to change the capacity of C613 10mk 100 volts, as well as solder the resistances R812 R812 R619 R808 R806 R609 R520
Sony KV-25K1R, KV-29K1R, widescreen and many other models! I want to share how to open the system menu of TVs: Take a remote control like Sony RM-862 and open it. In the upper part of the remote control, near the switch, there is a place for jumpers, to the left, under the switch there is a jumper. touch the wire to this jumper and the MENU button 1 time. The TV will enter a temporary test mode. In the upper right corner of the screen T If you press 2 times continuous test mode. In the upper right corner of the screen TT 2. Press the MENU button 2 times. Before you the service menu of the TV!
Sony KV-25t1r TV. When turned on, it tries to turn on, then the diode blinks 6 times. A close inspection of the board revealed an ic 500 (STV 9379 vertical scan). After eliminating the defect, everything works. Soldering breakdowns are the result of an unsuccessful way of fixing the board. A board containing massive elements, having a format of approximately 2/3, is fixed in a line on both smaller sides. But also getinax. A couple of years of operation and vibration from the speakers provides us with work
On the SONY TV KV-2553MT two defects at once: a) Strong nonlinearity in frames: replace C558 560 x 25. b) The quality of the image (kinks) and sound (wheezing) periodically deteriorates until they disappear completely (only snow on the screen): solder the contour in the IF201 submodule (radio channel )
Sony kv-2182m9. the raster is compressed from the sides by 5-10 cm and slightly stretched vertically. TDKS whistles death whistle. The supply voltage for horizontal scanning immediately after switching on 115v, but after 1-2 minutes it decreases to 80-85v. Defect: capacitor C614, through which the pulses arr. strokes are fed to the power supply from page sweep
TVs Sony KV-14T1R. Stood on duty during a thunderstorm. As a result. There is an OSD, and the picture barely leaks out (as if there is no brightness). At pin FC (21) (control of the RGB switch) MC44002P raised 0 and low amplitude of pulses (lines. It is very similar to a malfunction of the voltage multiplier on domestic TV. It turned out to be bad soldering of the case terminal of the line transformer
SONY KV-G21T1. The screen lights up in blue with reverse lines and then the protection is triggered. The power supply unit goes into standby mode. The voltage on the blue video amplifier in standby mode is 114 V, at the moment the kinescope is opened, the voltage drops to zero and the protection is triggered. At the moment of warming up, the filament sags and closes to the body. The case at the glow was cut off and laid with a separate wire (and not wound with an additional winding) from the 6th leg of the TDKS
SONY KV-M1400K. Does not turn on. The integral fuse N15 for the line scan power supply burned out, apparently due to a short-term overload. The rest is all right
SONY (personnel TDA8170) malfunction. there is a narrow horizontal bar on the screen. The TV came with a changed microcircuit. Measurements showed that the supply voltages and input signals of the microcircuit are normal, so we had to check the remaining electrolytes. And indeed, the reason turned out to be in one of them. the volume through which signals to change the horizontal size go (checked by replacement)
SONY-M2100K. Does not turn on. All voltages from the power supply are underestimated. On the 140V circuit, only 15V. In the primary circuit, all parts are intact, including STR54041. The diode D604 turned out to be faulty. Named as serviceable
SONY KV-21LT1B, chassis FE-2. The TV does not switch from standby to working mode, the LED blinks with a cycle of 11 flashes. pause. According to the table of error codes. there is no voltage of 8 volts. This voltage is formed by an integral stabilizer BA41W12ST-V5. We turn off the load circuits, at pin 1 of the microcircuit the voltage is 11 volts instead of eight. We change the protective zener diodes. D615, D012, D005 type MTZJ-8,8B. Instead of the BA41W12ST-V5 stabilizer (cost 10-18), I installed a KIA7808 stabilizer on the radiator.
Sony KV-21T1R. The option to select BG / DK has disappeared from the menu, and BG (5.5 MHz) has become the current one. It did not use the service. Swapped sound filters
Sony KV-C2171. Raster distortion and the absence of a brightness signal in the image. I am to blame for everything, the flashed firmware of the memory chip
SONY KV-14M1K. When turned on, the LED blinks 6 times. On the 52 leg of the processor, a high level. the protection for the power supply of the sweeps is triggered. Breakage of the resistor, power supply of the frame scan 24V with TDKS. The TDA9302 frame scan chip is broken. Replaced with a new one, the TV turned on
SONY KV.M25. etc., when turned on from the ST-BY standby mode, the LED goes out briefly, and then lights up constantly and no diagnostics. The problem turned out to be in the diode D314 for the power supply of the TDA8366 microcircuit. Before the diode 9 volts, after 5.5
SONY G14M1 First time came after a thunderstorm two years ago, changed STR, line transistor, SE115, 4558 in personnel
This year, after a thunderstorm, he died again. Checking. outwardly there are no signs, all elements are called the norm. And the power supply unit does not start, it taps and gives out about 30 volts instead of 115. I hang the lamp in the load. the same, I check all the elements of the primary circuit. things are good. As a result, it turned out to be a half-dead SE115, although it called normally
SONY KV-M2530K, SONY KV-M2531K, SONY KV-X2151 \ RM816 chassis AE-1C. Doesn’t switch channels. Only channel 00 works. The SDA2546 memory chip is out of order, you can put any 24C04
Sony 14 ‘KV-1484. After 10-20 minutes of work, control disappears. I tried to replace the 10 MHz quartz with 4.43 MHz, the processor does not heat up and the TV worked for several hours without any remarks. In order for the remote control to work, you also need to change the resonator 960 to 425-455 in it. (there was no council at that time)
SONY KV-25X5R chassis FE-1. After 3.5 years of flawless operation of the TV, the Q533 2SD2539 transistor in horizontal scanning failed. Detected non-slip capacitor C543 (470pF 2Kv)
Sony KV-25R1A / D / E / K / R. The power supply does not start. The output voltage slowly rises from zero to 24V. (norm-135v). The TV came in not repaired after replacing STRS6707. Instead of R = 0.33 ohm (measuring!) Set from 6 (STRS6707) to the ground, a PEL wound with a wire was stuck (not equivalent of course). Replaced with R = 0.33th and it all worked
Sony KV-M1400K. After a while, the sound disappears, and the noise remains. Solder quartz in the radio channel
Sony 14 ‘KV-1484. After 10-20 minutes of work, control disappears. I tried to replace the 10 MHz quartz with 4.43 MHz, the processor does not heat up and the TV worked for several hours without comment. In order for the remote control to work, you also need to change the resonator 960 to 425-455 in it. (there was no council at that time)
Sony KV-21FT1K (chassis FE-2) 11 flashes of the LED do not turn on, on the advice of 1021 we look at the BA41W12ST stabilizer, if you tear off the first leg (output 8V), when you turn on 9.3V on it, put the stabilizer 7808 at 8 volts, change the indicated zener diodes. Further, when 5 flashes are turned on, according to the table this is an IKR malfunction, transistors Q713, Q703 (BF420) and a diode D708 (replaced by 1N4148) are punctured on the kinescope board, it is also worth looking at similar transistors in the green and blue circuits
SONY 21FT1K does not turn on, does not respond to the remote control, dezh. there is. Worked for only a month since the end of the warranty. Replaced planar memory 24С08W6. The power supply of this memory is 3 volts. I installed a clean one and not a planar one, everything works. In the service, the adjustment did not have to be done
TV SONY KV-X2961 When switching from channel to channel, the required channel does not always turn on steadily, that is, the required number appears in the OSD for a short time, but switches back with the appearance of the picture. When you press the button on the remote again, everything happens correctly. From the front panel, the control works in the same way for this defect. Sometimes, according to the owners, he starts to switch himself, for example, from 6 to 7 and back, until you stop it with the remote control. I need a memory chip. Pre-read the old firmware with the programmer and uploaded it to the new memory 24c16
SONY 2540. The graphics are there, the cathodes are locked at 200V on each. Cause. open circuit resistor R318 1KOM on the submodule. Through it, from the CRT board, ABB measuring pulses are fed to the 30th leg of the TDA8366
SONY KV-AR14. There is no our D / K sound standard (imported from overseas). There is no line in the menu at all with switching the sound standard. Everything is treated from the service. You need to enter the service mode (i, 5, vol, power), find the OPT B 003 line and make it like this. OPT B 003 OPB3 008 servis 50, then find the line SDEM 002 and change it like this. SDEM 002 BPB 000 servis 50. After that, our sound will appear and the D / K or M line will appear in the menu (in the user menu)
SONY KV-21DK1 chassis SCC-F21S Received with a punctured output line transistor, the owner said that before the refusal, the image shrunk horizontally and began to double, after restoring the line, it turned out that way, the output stage warmed up wildly for several seconds. there is an increase in the horizontal frequency, but the frequency meter showed the norm, but the shape of the pulses was distorted. the through-line capacitor C513 is to blame. Loss of capacitance, stands next to powerful resistors, and therefore it gets very hot
SONY KV-2167 MT repaired 2 times with an interval of six months. 1. There is a raster with noises without an image and sound, does not respond to buttons and the remote control, FB251 is cut off. 15 V fuse with power supply. The ULF VA5412 microcircuit turned out to be faulty, power supply broken. 2.When turned on, there is a burst of high, then does not come out of standby mode. The voltage from the power supply unit is normal, there are no short circuits in the secondary circuits., The line transistor and memory are in good order. C562 100×16 swam in the circuit of the Q561 transistor, and it was checked as working with the C-meter, after replacement everything works
SONY KV-M1400K Does not turn on. The LED on the front panel does not show signs of life, all voltages of the power supply are 10 times too low. Diode D604. defective (RGP15J replaced by FR155) is called as a serviceable digital tester in diode continuity mode, but in resistance measurement mode it shows 5.7kΩ in both directions. After replacing, check the R606 68Ω resistor on the first leg of STR54041, it was open-circuit (do not turn on the TV before that.Otherwise, if the resistor is open-circuit (or the feedback does not work for another reason), then all voltages will be overestimated 3 times, i.e. instead of 120 volts, 380 will go to the circuit. instead of 20 volts, 60 volts will go, and the ULF TDA7245 will die first, since the voltage of 60 volts (instead of 20) goes to it without stabilization), check the serviceability of the fuse N15 (0.6A) and the limiting zener diode R2M on the power supply of the horizontal scan (B 120 Volts), the horizontal transistor BU508A, ULF TDA7245 (the burned-out microcircuit gives 12 Ohm at the power input, for the power supply unit it is a short circuit). After all the ordeals, the TV will probably work
Sony KV-L34MF1 The microcircuit flies from the power supply unit STRS6708 The TV was brought dug and with the exploded STRS6708 The tracks were peeled off from the board, apparently changed many times. Searching for nothing found many problems with these STRs but nobody solved this problem or wrote the end result. First of all, I changed the STR-ku. related parts and capacitors. When turned on after 2-3 seconds, the STR got very hot. It attracted attention that at the input of the diode bridge
220V and at the output of 600V it seems to be impossible? But miracles don’t happen right! So in this case, immediately change STR81145, which works in parallel with the power supply unit on the STRS6708, the second output of the STR-ke mass was open and it turned out to be a voltage multiplier by two, that’s all.!
SONY KV-2540 Ch B3-E there is no picture, sometimes it appears without synchronization and poor quality. There is sound, but it stutters. In AV mode, it works without problems. The CHIP Conder C155 in the buffer stage (issue Q132) on board A is defective. Decreased to hundreds of pF. Unfortunately, the nominal value is not indicated on the diagram and replaced it with a 0.047μF condender. Works without comment. The failure of the CHIP of the conductors is an ordinary case, but my tip will help anyone save time
SONY KV-21M3K TV works for 1-2 minutes and turns off in standby mode. In this case, the LED blinks 6 times. Soldering the video processor solved all the problems
SONY KV-21C4R There is a black vertical stripe in the center of the screen. Approximately 10 cm. OSD (graphics) twitches. Fault C810 0.001, R012 47Kom
SONY KV-2220ES. BP in defense. Broken C818 (20 μF 250 V).It is in the scanner
SONI KV-M2100K no correction replace C806.47nk C808. PM105J D802. D28-06
S0NY G21M1 LED is blinking or STRS6707 is broken. replace C623 220.0x16V
SONY KV-14M1. The TV works for 15-20 minutes normally. Then, when switching programs, the TV. the LED is on (pseudo STN-BY) and does not respond to any commands, including STN-BY. You can turn it off only with the power button. If you immediately turn on the power button, then the TV, bypassing the standby mode, immediately turns on the program (sometimes at 00), which can work for a long time, if you do not switch programs and do not use the settings. The suspicion was for a 12 MHz quartz processor (quartz was replaced). The cause of the malfunction was the 24CO2 memory chip. After replacement, you have to reprogram all channels again.
SONY KV-25X1R After switching on, a high appears, for a split second. trapezoidal image on and off. Defective vertical scan microcircuit STV9379. Plants. 15 volts
S0NY KV-C2511D AE-1A no start (on the front panel the diode blinks continuously), according to the owner, the TV started after a few minutes, with each subsequent day the turn-on time increased. When switching off the TV, a high voltage sound is heard (TV tries to start). After checking the voltage of the PSU (secondary circuit), on the Q603 2SB1185 transistor (the emitter has a change, there is no filtering), replace the C615 1000.0 / 35v.
S0NY KV-C2569D AE-1 No start (pulsating three attempts) and blocking. Check by replacing C605 220 / 35v (power supply 12v, 15-pin TEA2260)
S0NY KV-C2951 TV operates in AV mode. there is no picture from the tuner. Graphics are normal, there is no snow during channel settings. The transistor in the submodule of the Q7 radio channel is faulty (FQ was replaced with 3J). SMD SI-P
Sony KV-M2101D having made a visual inspection, on the main board (OS connector) on the bottom side there is a charred block and a diode contact D806 (RGP02-17 has a high resistance of about 2-8kOhm. Norm). We eliminate burning, turn on TV. there is no start, the diode blinks 2 times. check the fuse supplying B to the TDKS (visually similar to a transistor, in the TRAF area)
SONY KV-S2911D TV turns on, works fine, but after shutdown there is no start, but only pulsating start attempts (with a high one) or with an understated power supply of the 180-200v network, the same picture. The power supply unit is assembled on 4605-3 (you can install 4605). check R611 100 Ohm. (from 10-pins TPI to D602)
SONY KV-X2941 AE-1C no start, the mode diode does not light up, applying 12v to the PC C714 TV starts, check 15.5 on the Q609 collector. breakage R618 or track from D623
Monoblock SONY KV-14V1K Turns on, can receive a cassette, but only manually return it. At first glance, the defect is simple, the output voltages are lowered to 10V after replacing almost the entire STR 6708 strapping and replacing the SE115. the defect remains! After several more days of searching, I found a planar transistor Q606. leak K-E. After replacing his candy bar came to life
Sony KV-2182M9 there is a narrow strip on the screen, about 10 cm.The reason is in the C558 capacitor (470 microfarads at 25 V.), dried up to 250 microfarads
SONY KV-X2901K. Malfunction. chaotic loss of reception on the I-th band (1-5 meter channels), we have an ORT program on the first button. It is clear that the matter is in the UV-916H tuner. I remove, solder almost the entire board. shielding partitions, coils, microcircuits, conclusions. A month later, a repeat with the same malfunction. Additional feature. when you move the plug in the antenna socket, reception appears, it is clear that somewhere the contact is missing. Again I had to unsolder the tuner and connect it with a loop. He took off the shielding covers and began to gently deform the tuner’s body, and the reception appeared. Using the insulated stick method, I found a missing contact between the case and the printed circuit board (this place is located in the upper part of the board near the back wall, almost opposite the antenna socket). I could not detect this defect visually. Conclusion: in order not to suffer, you need to immediately solder these damned tuners from SONEK completely, since their service life has expired, and people do not want to buy new TVs, and it seems to me that the new ones are worse than the old ones, you can cite as an example the TVs that were brought from. abroad and bought in. they work for 15-20 years
SONY KV-2000E. Fault: does not turn on. Failed BU208 in the power supply. Reason: there is a break in the lower case terristor marked SG-613. There are no analogues, You can try to restore the faulty terristor: for this we cut off its upper part by 1-2 mm on emery until there is free access to the crystal. We check the presence of contact from the leads to the crystal and restore it using conductive glue. Seals the hole with an aluminum plate using glue. We change BU208, install the repaired SG-613 terristor and turn on the TV
SONY KV-X2571R Problem: Correction of the raster (concavity on the sides) is violated, but some strange, not symmetrical and the vertical size is violated and the raster is shifted up. After a long research of the scanner, I realized that everything was in order there. The thought was suggested by the fact that all these distortions also change with new switching on. Sometimes the channel setting is lost when switching from channel to channel. I started looking in the memory area, and it immediately turned out that the SCL synchro bus goes 5v and only 3v on the SDA data bus. The shape of the impulses is normal. The voltage sat down on a protective zener diode. Replaced it all worked. This breakdown is surprising in its symptoms.
SONY KV-A2521K. When turned on, it seems to turn on, but there is no raster and sound. The indicator blinks at intervals of about 20-25 seconds once. Sometimes when turned on for 1 sec. high voltage appears and then silence. When checking, it was found that the power supply of the horizontal scan at some point is 135 volts, then it becomes equal to 150 volts. At the same time, there are no pulses for starting a horizontal scan from the 10th leg of the TEA2028B into the base of the 2SC2688 swing transistor. Also, the voltage of 12 volts is underestimated somewhere down to 10.5 volts. When the oscilloscope checked the pulses on the remaining pins of the TEA2028B microcircuit, everything seemed to be normal, but only on the 12th leg the pulses changed their shape. This H PLS pulse comes from the TEA2028B to the board where the raster correction circuit is located on the TEA2031A microcircuit. It also contains 2 SCART connectors, and cascades on TDA6200 microcircuits; CXA1114P etc. So on this board there is a diode designated in the diagram as D1504. This very diode stands in the circuit where the H PLS pulse passes. He then leaked. The reverse junction resistance is about 60Kom. The diode itself is turned on by the cathode to 12 volts. It turns out that through this leak, a voltage of 12 volts was mixed into the H PLS pulse and the processor worked out the error. After replacing the diode, the line scan started and the TV came to life
SONY KV-2584MT, 8-10 years old, GP-1A chassis. It turns on normally, works for up to a minute, or a little longer, then goes into standby mode. It turned out that the protection circuit, assembled on two transistors Q312, Q313, is triggered, which fix a drop of 130v on a powerful resistor R340 1.2om connected in series in a 130v circuit. The resistor burned out over the years and began to show about 6-8 ohms, this was enough, to fix false overload
SONY KV-G21M1, when the power button is turned on, the power pulses as if overloaded, it is on STRS6707, change 470.0x16v in the STR strap, at the same time 470x25v in the same place
SONY KV-21VM3MT Shassis BC-2. (video dual) Fault: there is no sound in the TV and VCR. The ULF works, the adjustment indication on the screen is from 0 to 100. The firmware of the 24C08 memory chip has flown. Change memory on the programmer
SONY KV-M1400K. Fault: when you turn it on, you can hear the start of the power supply, but the indicator of neither standby nor operating mode does not light up, the lowercase does not start at all. I started by measuring secondary supply voltages. Oddly enough, all tensions were normal. I looked at the processor, on the 41st leg. high level and does not change, when turned on, to low. Replaced the PCA84C840P / 012A processor. I turn it on, the standby indicator light up, as expected, red. I give it from the remote control to turn it on, goes into operating mode (the LED lights up green), but the result is the same, the lowercase does not start. After checking all the lines for starting the line scan, I did not find a specific defect. Then I decided to check the output circuit of the 12V stabilizer for a short one. The resistance of the output circuit of the stabilizer was 25 ohms. I began to sequentially unsolder the outputs of the microcircuits powered by this stabilizer. The faulty ones turned out to be: TDA7245 (full short 3 legs, it was already soldered by craftsmen) and TDA3508 (resistance between the 6th and 24th legs of the 25th). I replaced the TDA7245, but the TDA3508 was not at hand, I put the TDA3505 instead. I turn it on, no result. Then I change the TDA8304, turn it on, the lowercase has started, service information is displayed, but there is no image and sound. When applied to the LF input, the image and sound are normal, but silence from the tuner. God knows how long it took, I found an SMD transistor DTC124EK (the inscription on it is 25) on the Q020 circuit. This transistor switches the TV to TV / AV mode on command from the processor. He then was in the leak on (collector-emitter). When dialing the tester, be careful. it is with resistors inside. In my case, the transistor rang on K-E, like a conventional base-collector. After its replacement, the long-awaited image appeared, but at the moment of switching on, a bluish raster with reverse lines appears for a few seconds, and the image is normal, but without color. Maybe the line for a few seconds is due to the fact that instead of the TDA3508, I put the TDA3505. I’m digging further and one more microcircuit is faulty. TDA4650. I replace, the color appears. But here again the gimp. no sound. Rather, there is, but very weak with hiss, and even then, if the volume is turned on to maximum. Generally a circus. Almost everything does not work. I checked the sound channel and found two dead microcircuits. TDA3827 and CX20061. I change it, turn it on, and the sound is normal. The only thing left is the illumination of the raster with a bluish background with OX lines at the moment of switching on, literally by 5 seconds. But the owner did not even look at it. I tried to regulate the accelerating one, changed the conductors for the power supply of the video amplifier circuits and no changes, I am inclined to believe that the parameters of the TDA3508 and 05 are still different
SONY-KV-M2530k, Fault: there is no frame scan, the TDA8170 is out of order, but when replacing it, I recommend changing immediately its environment in the form of capacitors: C532 100.0x63v, C531 680.0x25v, C522 100.0x63v, because they are are almost always dry by this time
SONY KV2184MT Fault: went out when turned on from the duty room. The fuse is intact. The internal power transistor of the PWM STR50115B is open, R2M on B is broken. Everything has been replaced. TV started up, B is normal, there is a horizontal bar on the screen. In the break R853 (0.47E) on the E power supply of the KR. Replaced. TV turns on for 1 sec. and is cut down. Broken ms. KR hPC1488H. Replaced with LA7830 and it worked
SONY KV-G21M2. The raster is narrowed horizontally, there is no sound. The malfunctions, as it turned out, are related. The 115V capacitor was blown up, and the MC of the TA8248K sound was terribly warm. After a double replacement, the TV worked fine. According to the owner, there was very little tension on the previous night, the lights were barely glowing, and the TV was in the duty room. Apparently the power supply could not stand the bullying. Power is supplied to the MS of sound and in the duty room. Just in case, I changed the PC123 optocoupler. He’s not expensive
SONY KV-29LS60K, chassis AE6B. Fault: when turned on, the LED on the front panel flashes. two flashes each (means overcurrent), if you press the power buttons on the remote control. and off. the TV starts blinking in series of three flashes (means overvoltage). When a light bulb was connected instead of a 135V load, it flashed for a moment, then went out. With the connection of the load, the light stopped even briefly lighting up. After a thorough check of the elements on the line scan board, an element P5NA40 was found (item designation like Q8806). After replacing it with the P6NA60, the TV’s performance was restored. I also noticed that if you turn off the SCREEN control on the TDKS completely, the LED on the front panel starts blinking five times, but the image and sound remain. An unpackaged diode was also found, one end of which was not soldered, but contact with the board was due to the fact that it was tightly glued to the board. It was located on the power supply board, through it the STB6V signal went to the relay. Here is a white assembly for you, over time this malfunction, I think, would also come out
Sony M2155 and others like them. No color in PAL. The defect has been described many times. solutions are different. But the simplest thing. put instead of variable capacitance (about quartz 8.86 PAL) constant 18 pF and that’s it. This has been practiced for a very long time.
SONY KV-2100 or similar. When enabled, the raster is illuminated gradually to the maximum. There are no pictures, the channel number is barely visible, the sound is normal, there are no reverse lines of the CD. Replacing the TDA3508 does not help. Three-level strobe of normal amplitude. The capacitor of the capacitive divider SIOX is faulty (the OX pulse is removed from it to form the strobe), connected to the collector of the line transistor. As a result of the deterioration of the Q-factor of the capacitor, the amplitude of the pulse applied to the formation of the three-level strobe decreases, which leads to a decrease in the duration of the middle SSB area and the failure of the ABB circuit
Sony KV-25R1A / D / E / K / R Fault: the cut in the image increases with increasing brightness, it looks like a dead TDKS. It turned out that the poor soldering of the box terminal of the line transformer, although it did take place, had nothing to do with it. Replacement TDKS 859898800
SONY KV2964MT. When turned on, it beeps. Overload 130V. For a long time I could not find what was the matter. It turned out to be a dead R2 (I don’t remember with which letter). That’s what I was looking for. It stands not, as usual, near the power supply transformer, but somewhere in the middle of the entire board, and the board is very large and dirty (the TV is 15 years old). The root cause. capacitors C613 10mkFx100V and C11-47mkFx50 V in the strapping of the STR S5941 BP microcircuit. They were at zero
Sony G21M2. Does not turn on. Broken line transistor D1878. The reason seems to be obvious. cold soldering TMS. Soldered, the transistor was replaced with an identical one. I turn it on. The raster on the right does not fully open, the transistor heats up quickly. Once again I checked everything that is possible and what is not. Lost a lot of time. Then I decided to change the line transistor again. This time I installed D2333 and it worked. D1878 turned out to be defective, although it called out great and even launched a lowercase scan
Chinese TV Sony (chassis. 3Y01) composition: LC863332B (5Z51 3M05) LA76810A LA7642 (Seсam) CS5265 (ULF) 24С16. Fault: when the Auto search option is selected in the menu, the channels are rebuilt, but they are not recorded in the memory. Immediately replaced the memory. Result 0. Confused by one more thing. after 5 minutes of operation, the processor froze (the screen darkened, the control disappeared). The next step (which, in science, should have been the first, of course). checking processor power (and memory). Result. 9.5V (although no overheating of the IC cases was observed). Cause. stabilizer 7805 (item N553). After its replacement, the voltage returned to normal (5 V) and the channels were recorded in memory. Yes EPROMku had to leave a new one (the native still could not stand the double power supply. It was read, but did not write new data), but the processor. turned out to be more alive
SONY KV-G21M2 Extinguished The fuse is intact, R611 (0.1E) is open. Replaced. PSU on STR-S6708. Replaced. Also replaced by C623.624 at 470 uF. TV started working
SONY KV-25M1K After 5 minutes, all adjustments stop working, the channel does not switch. May not turn on, LED does not blink. Quartz replacement 3579545
SONY KV-2185MT no horizontal scan start, starts on 5 attempts, the output transistor heats up, replace C513 1.0x50V
Sony KV-21M3K (chassis BE-4A). Almost complete repetition of secret 569. TV does not turn on, there are 4 flashes in the duty room. There is no start from MC44002P, after replacing it from FBT it hits the spark into the core and the expensive 44002 dies again
Sony KV-M2100K, Fault: the image is strongly shifted to the right with a large turn on the left, the defect may self-eliminate, and then reappear. It turned out that R822 was poorly soldered by 1.8K, along the SSCP circuit, a breakdown occurs for the third time, it looks like this model has a weak point over the years
SONY KV-32FX68U chassis AE-6B. Fault: the TV does not turn on. The LED on the front of the TV blinks 14 times. The posistor of the demagnetization loop of the TH6002 kinescope is faulty
SONY KV-M2540 Chassis BE-3B Fault: there is sound and OSD graphics, no picture. On the ABL bus of board A (-2 volts), although it should be 5 volts. Resistor R829 56 kOhm is interrupted
SONY KV-G21M2. Fault: the TV turns on, but after 5 seconds it goes into standby mode. At the same time, there is sound, control works, the screen is dark, there are no graphics. It is noticed that when the Screen is enlarged, there is a slight backlight on the screen. Power supply output voltages are normal, lowercase. normal. Faulty IC551 LA7830 and capacity C552 100.0×35 V. at 7 (n) IC551
SONY-KV1984MT chassis GP-1A Fault: there is no sound, the amplifier is assembled on the IMC TDA2007. The 6.2 V zener diode D200 is faulty, the tester shows a short
SONY KV-M2540. Fault: Narrowing (turning) of the raster at the bottom of the screen. Cause. change in the value of the resistor R510 in the power circuit of the STV9379 microcircuit
Sony KV-21DK2. Fault: when turned on, an overload squeak is heard in the SR. At the same time, the power supply of the SR is underestimated to 80 V. When the CP is off, it works normally at a load of 40 W. The reason turned out to be in the ring cracks on the 500 kHz quartz of the CXA1213BS video processor
SONY-29CS30K Fault: the TV does not turn on, the LED on the front of the TV flashes 13 times. Broken line transistor BU2515DX
SONY KV-M2170K Problem: no vertical scanning (narrow band). R814 is cut off according to the scheme. 0.56 ohm
SONY KV-E2561, KV-E2961 chassis AE-2F Fault: when the beam is turned back on, the TV turns off after 1.2 minutes and the LED on the front panel blinks 5 times. Open circuit diode D1351. Through the diode, a voltage of 9 volts is supplied to the IC1351 TDA4780. RGB / CHROMA video processor
SONY KV-21FT1K. Remote RM-887. Fault: when turned on, the self-diagnosis LED blinks 11 times. The standby power supply unit is intact. The main power supply does not work. An open circuit is one of the chain of resistors connected in series R633, R610, R648, all at 330K, in the start circuit of the MCZ3001D PWM controller
SONY KV-G21M2. Fault: does not turn on, the fuse is intact, there is no voltage at the output of the power supply. Broken line transistor. After replacing, I tested the line scan. Start pulses from the video processor. yes, on the preamplifier. yes, at the entrance to the TMS. there are, but not very beautiful, there are no pulses on the collector of the line transistor. TMS was the culprit. Delivered the domestic TMS-21. I also found a burnt out FR in the power supply circuit of 200V video amplifiers
SONY KV-M1400K. Fault: according to the owner, the image was turned on, but after a while the raster began to disappear, while the sound remained. This time was gradually reduced and reached 5.10 minutes. I turn on the TV, indeed, the image is good, but after 10 minutes the screen gradually faded and the sound remained. Service information also disappeared. If the TV is allowed to cool down for a while and turn on, everything appears again and after 10 minutes it is completely dark. During the repair, it turned out that the fault was in the ABB circuit (auto white balance). The signals on the TDA3505 have been checked. RGB signals disappeared at 1, 3, 5 pins, of course the ABB circuit did not work and the screen went out. The signal on the 26th leg also disappeared. If you look at the diagram, then a cascade is assembled there on the Q305 transistor. This transistor is SMD (2SC2712G) A / C amplifier. So in the base circuit for power supply there is a capacitor C329 22.0x16B. He then leaked. After the replacement, everything worked as it should
SONY KV-A2521D. Fault: unstable decoding of PAL signal. Typical malfunction of these models, described on the site repeatedly. Cause. substandard components. The tuning capacitance C302 in the circuit of the 8.86 MHz crystal oscillator was replaced with a constant 10 pF (in another case, according to the site’s materials, it was 18 pF). The fault remained only on one of the PAL encoded channels. The TV works on the cable TV network. strong signal. At the averaged settings, the contrast turned out to be driven by 3/4 of the range, and I removed it by 1/2. everything is fine. Due to over-amplification, the PCTS was distorted, which prevented the decoder from correctly recognizing the signal, plus a known defect in the color module. Obviously this model has problems with AGC too.
SONY KV-G21M1 Problem: on the TV screen, about 10 cm of the upper part of the image has moved down to the bottom of the screen. I measured the voltage on the vertical sweep. everything is normal, except for 2 legs instead of 0.3v (-6v). I checked the 45th leg of the video processor with an oscilloscope (frame trigger pulse), it is not there (only noise) on the 44th leg, a sawtooth pulse of 100mV. Replaced TDA8366. The TV started working normally
Sony KV-21FT, chassis FE-2. The device was returned for repair after a thunderstorm. Fault: light raster with LOH. Is there sound. The LED blinks 5 times (Unstable current of the kinescope cathodes). Defective diode D504 in the OX pulse chain of the frame scan
Sony KV-G14M1. BG-S. Central processing unit CXP85116B-621S, video processor TDA8366. Fault: when turned on, a high appears for a moment and the TV goes into standby mode. If you turn off the protection, which is formed from three sensors assembled on transistors Q1513 (personnel), Q561 (B) and Q030 (lowercase) on the 50th leg of the IC300, and close this leg to the ground and add accelerating ones, we will see a bluish glow and rainbow stripes on the screen Here you can step on a rake and look for a malfunction for a long time, since you might think that the personnel and lowercase are normal. But in fact, the screen glows due to the features of the kinescope and does not mean that there will be a horizontal stripe due to the lack of frame pulses from the TDA8366. In this case, when checking the sensor strapping, a punched C1513 100 / 16v was found. In another device with exactly the same symptoms, R563 180k was cut off in the harness of the Q561 (B) sensor
SONY KV-21LT1K chassis FE-2. Fault: the LED on the front of the TV blinks 11 times and clicks the relay, turning off the main source. But this is not an 8 volt stabilizer, since the TV can be turned on and off with the remote control or the button 10 times, while the TV works fine until you turn it off, then you need to turn it on and off again, but less than 8 times 8. The strapping and triggering resistors of the PWM controller NCZ3001 were checked everything is intact. This malfunction is given by the PWM of the power supply
SONY KV-25FX30K, Fault: the vertical size (pillow) was narrowed, the TV was already being repaired before this defect with the replacement of the line operator and the processor, it worked for only two months, the feeling as if it was not completed in the first repair. Upon opening and inspection, a severely burnt resistor R539 1Kom, 2W, and a swollen capacitor C550 33Mk at 160V were found, after replacing these elements, the size became almost normal, but after 5-10 minutes. work, the resistor again overheated, the reason for this was R595 1 Ohm, which was in a cliff, because of it, and apparently this breakdown happened
SONY KV-25M1K Fault: the TV may turn on, but when you switch programs, it goes into the bowl. mode. Otherwise, the LED is on. It is impossible to turn on the TV, or the LED is off. The TV does not turn on. Fault: annular microcrack all in the same channel selector
Sony KV-G14M1. chassis BG-1S. video processor TDA8375. Fault: the screen is dark, the accelerating voltage can be changed from 200-800V, there is sound, there is OSD, 198v on the cathodes. There is no signal at the outputs of the TDA8375, the sweeps are working. If you increase the incandescence by short-circuiting the current-limiting resistor R705, then a sluggish image appears. One of the kinescope cannons has died, and the automatics cut out the image. If you do not want to change the pipe and are satisfied with the hooked color, the automation can be fooled. You can take three resistors of three megohms and solder them on the kinescope board from the 200V bus to the emitters of the transistors that go directly to the cathodes. You can, of course, only roughen up the dead color, but with three you get a slight alignment. Thus, even with a completely dead cannon, the impression of its work is created. Of course, it is necessary to stretch the dead color as much as possible.
Sony KV-M2100K missing or missing color in the PAL system. I offer my own way of troubleshooting. We solder the trimmer capacitor, trying not to knock off its setting. On the reverse side, where the flaring of the rotor lining is performed, we drip liquid flux and simply solder it so that the drop of solder covers all the places of the mechanical connection. We are waiting for cooling and put the container in place. We do the same with the second capacitor. If the position of the rotor does not cause confidence, then initially it is worth adjusting it. And pay attention to the soldering of the TDKS OUTPUTS!
Sony KV-25M1K Problem: during auto-tuning, programs are not fixed, with manual. there is no general synchronization. On the 2nd leg of the BA7046F, instead of the 5v pulse, 0.5v was present. It needs to be changed, but the microcircuit was not on sale. Loaded 820 ohms on 2 leg, thereby increasing the offset to the base of Q120, it began to open and give out sync pulses. A year passed until they returned
SONY KV-S29RN1. Fault: general synchronization was intermittently lost. Also disappeared when tapping the teletext board. Jumper PS01 on the teletext board broke
SONY KV-2185MT Fault: the sound disappears, or is completely absent, when the board is tapped, it may appear again. Check and, if necessary, solder the chip resistor R864 along the MUTE circuit, this is not the first time with this chassis
Sony 21LT1K (made in SLOVAKIA). Malfunction: admitted with a diagnosis. turns off. The screen is filled with red, OHL, after 3 seconds it goes into defense, the LED blinks 2 times. It is very similar to the sagging of the glow in the picture tube, but it turned out that the banal lack of loss on the board of the picture tube
SONY KV-G21M2 chassis BG-2S Fault: Knocking out lines. at first it is small, and after 10 minutes the color disappears, the sound with hiss (similar to sewing the multiplier UN-8,5 / 25 in ULPCT, UPIMTsT). The defect was eliminated after replacing TDKS 8-598-811-00. It took only a small adjustment in the service: the phase of the lines and the horizontal size
SONY KV-M2155K. Fault: the TV does not turn on. Broken line power transistor 2SD1878. Remembering that they rarely fail on their own, which is, as a rule, the reason, I solder TMS and all unreliable solders. I install a new transistor, TV starts up, a characteristic (some kind of inactive) rustle of a high appearance is heard, but there is no raster. At the same time, I detect an instant heating of the installed transistor. Once again I check the line scan circuit, high-voltage capacitors, supply voltage. Everything is okay! I am inclined to replace the line scan transformer FBT (859-898-800). I change it and feel bitter disappointment. the defect has not disappeared. Now the shape of the horizontal trigger pulse is under suspicion. The oscillogram shows a littered horizontal trigger pulse. To be sure, I started a pulse from the USR-1 unit (from Rubin Ts-381) and a raster appears, and the transistor is slightly warm! Before changing the TDA8304A synchroprocessor, I check the startup chain. The root of evil ended up in the C840 0.47x50v container. Replaced by 1.0x100v. the TV worked fine
Sony KLV-27HR3 LCD. Brought from Germany. Assembled in Spain 03.2005, Taiwan accessories. New. Fault: when turned on, a menu appears. after a couple of seconds it goes out, blinks two, three times and turns off at. After shutdown, the red LED blinks 4 times. On the LCD E211079 board, one of the seven PWM controllers, the backlight power converters, is faulty. In this case, IC501 OZ9721GN
SONY chassis AE-6. (usually FX66 or LC60). Fault: after warming up, the TV lives its own life. Up to spontaneous popping out of individual menu items. In the conference on TELEMASTER many copies were broken. And they washed and soldered and fried the M board (processor, memory). Colleagues, believe me, this kitchen will not help. It is necessary to change either the M board or the planar processor in it. Please note that you need to look for a processor with the corrected firmware 0359
Sony chassis FE-2. Fault: the LED on the front of the TV blinks 11 times. Check the line scan power transistor. After replacing the transistor, the TV does not start, the LED on the front panel blinks 2 times. We remove the line transformer and check. Most likely the transformer will be faulty. After replacing the transformer, the TV starts up, there is sound, there is no picture. precisely, something is slightly visible if you twist the accelerating voltage. We take a closer look at the strapping of the line transformer. If the chains are ABL. burnt elements D507, D505, R565 are detected, then the central processor with a 90% probability is out of order
SONY KP-S4613, KP-41S4 and similar. Large projection TVs. Fault: included, progressive pillow with ignorance. We climb onto the information board. Two large STK392-150. On the nutrition of one of them. black breaking resistance. We buy and are moved by the amazingly low price of a Chinese product. We cannot change and reduce normally. You need to buy your own (there is still a letter on the mikrushka. L. in my opinion) or 2 cheap Chinese at once
SONY KV-25M1 chassis BE-3B. Fault: When turned on with the power button, an impulse of the demagnetization loop of the kinescope and nothing else is heard. No raster, no image. The front panel LED is on. To begin with, I removed and examined the main board D. there were many ring cracks in the area of the terminals of the m / frame scan circuit IC500 and the line transformer T803. I carefully soldered the entire board. The TV began to turn on, an image appeared, but there was no reaction to the buttons, there was no control. I replaced the IC002 non-volatile memory chip, installed a new one on the socket (in case of future repairs). The device began to be controlled normally, but sometimes the image disappeared, the raster was also from the LF input. Video all without problems. I decided to solder the tuner. No improvements, even after installing additional ground jumpers, worried about the strong heating of the tuner’s m / circuits. Replaced the Spanish tuner BTP-EC411 8-598-045-01 with the same Malaysian one. Finally everything worked as it should! The TV as a whole left a vile impression, and the Trinitrona picture is grayish, even in the service mode it was not possible to improve. P.S. The service manual for the repair of this model says that the TV by flashes of the LED indicates a malfunction of the units, however, during the entire repair of the flashes, I have not seen
Sony KV-25M1K. Fault: there is no image from the video inputs, there is sound. On PIN 34 CXA1855Q (VOUT1) there is an external video signal, on the basis of Q403 it is also present, but there is no signal on its emitter. The reason is the breakage of R313 (100 ohms). circuit from emitter Q403 to input 29 TDA8366 (EXT CUBS IN)
SONY shassis BE-4, BE-5. I want to return to a defect common in these models: a failure of the PROM, leading to an overestimation of the line scan frequency, which in turn is accompanied by a narrowing of the raster size, complete absence of an image, chaotic flashes of the raster, etc. In most cases, there is no need to change and rewrite the new m / circuit of the 24CO4 PROM, it is enough to put the TV into standby mode, enter the service mode by pressing the buttons on the remote control in sequence: The screen will display (may not appear): TT. In any case, we enter the value 15 from the remote control, thus rewriting the basic settings from the memory of the control processor to the EPROM. We turn off and turn on the TV again, if the service information appears on the screen, you can start setting up the TV. If necessary, we adjust the raster geometry, white balance, adjust the AFC and AGC
SONY KV-3400 is a 1998 model. Fault: when turned on, the power supply starts up. The voltage at the output of the power supply is constantly pulsing. The LED on the front of the TV dims in time with the voltage ripple. There is no sound and bitmap. According to the owner, the TV was repaired at home three times by the same master. After each repair, the malfunction was repeated every week. The culprit of the malfunction is the Q805 2SC2688 line scan pre-output transistor. It was he who was out of order every week. And the reason for the weekly failure of this transistor was the R822 1Kom resistor. During the first repair, the master at home, apparently due to the lack of a circuit, replaced it with a resistance of 5.1 Ohm
Sony KV-29X2D Fault: Violation at the bottom of the raster in the form of discharges and line pairing (stripes). Inspection with an oscilloscope showed the presence of an RF patch at the input of the STV9379 vertical sweep microcircuit due to a defect in the filter capacitor C1506 (chip) 0.0022. A similar defect, but in the upper part of the raster, can be caused by a significant increase in the resistance of the resistor R1519 (120 Ohm, 3 W)
Sony KV-2131 Fault: the TV works for several minutes, after which a chaotic twitching of the image begins with a non-periodic interval, with a short-term loss of synchronization characteristic of a breakdown in high-voltage circuits. This thought was reinforced by the oscilloscope test. Emissions characteristic of breakdowns were detected, however, a detailed check with the substitution of all (!) Details of the BSR, including TDKS, did not lead to anything. After several days of observation, a short-term loss of synchronization was found, which prompted to check the synchronization circuit and the division of clock pulses between the TDA2579 and the teletext mode, it was found that the power circuits of the teletext module are CHIP. transistors, leaks in which led to how much heat that the board around them turned black. Replacing the transistors fixed the malfunction
Sony KV-14M1K. Chassis BE-4A. The malfunction manifested itself as follows: the picture was shifted to the left by about 5 cm, the OSD did not work. Replacing the memory chip with the new firmware did not lead to the elimination of the malfunction. The reason was rather unexpected. there was a C809 (1000pF, 2kV) capacitor installed in the line scan
Sony KV-2565MT. Chassis GP-1A. Fault: A few minutes after switching on, the screen goes out. When examining with an oscilloscope, it was found that at the time of the defect. the horizontal triggering pulses at the output of the IC CXA1213BS disappear. The search for the cause led to the resistor R340 (1.2 Ohm 3 W. stands in the power circuit of the output stage of the horizontal scan), a signal is removed from it to the protection circuit. With a slight warm-up, the resistance of this resistor increased
SONY KV-3400DV2 Fault: a horizontal strip appears in the light picture, sound disappears, secondary voltages float. Defective C610 (47m50v) in the power supply
Sony KV-G21M2. Fault: no picture, burning smell. Breakdown of S820 (1000nF 2kV) in line scan
Sony KV-G14M1. Fault: with warming up, the phase shifts and the line transistor begins to heat up strongly. Diode D860 is faulty (leakage)
Sony KV-G14M1. Fault: no sound is not tuned to channels (remembers only previously tuned channels). Defective transistor Q031 (2SA1037K) in SMD package. Open base-emitter. Replaced by 2SA1015
SONY KV-G21M2. Fault: when switched on to the network, the power supply jokes, tries to start and the LED on the front panel blinks synchronously. Check and, if necessary, replace C624, loss of capacity. Fault: OX lines are visible at the top of the image. Check and, if necessary, replace C552 100.0x16V, near the personnel chip, loss of capacity
Sony KV-29FX66E. Fault: the image and sound disappear, the relay clicks. Screen with a dark raster (as in AV mode), horizontal stripes are visible in the upper part. With the AV input, everything works without interruptions. Suspicion of a tuner with a radio channel (BTF-EC411 BD1M14 8-598-533-01). The replacement gave nothing. The memory (SMD) was flashed. The result is zero. As a result, the SAA5665HL / M1 / 0358 processor was soldered) 100 feet and a flash drive (Samsung143 K6T2008V2A-YF70) on the M board. Only after that the TV worked normally
Sony KV-M2530K. Fault: there is a narrow horizontal bar on the screen. IC1501 (TEA2031A. In the raster correction submodule) turned out to be faulty and the resistor R802 (4.7 Ohm) in the frame scan power supply circuit was cut off. After replacing these parts, the raster appeared, but m / s IC1501 is very hot and a small fold is noticeable on the raster. The reason turned out to be in a faulty capacitor C531 (680.0 x 25V)
Sony KV-2184MT. Fault: no start of line scan. fuse PS801 is open. After starting line scan. on the screen LOH at the top of the raster, vertical nonlinearity and frame rotation at the bottom of the screen. LOH were eliminated after replacing the C552 (100.0x50V), and nonlinearity and volvulus. after replacing С558 (470.0х25V)
Sony KV-2184MT Problem: does not hold the setting, or the setting goes away after a while. It can be adjusted by fine tuning, but when switching to another channel, it moves out again. Naturally, automatic tuning does not work (flies). The malfunction has occurred more than once. Remove cm / d of the radio channel and carefully solder. And that’s all. True, once I had to tinker: they soldered the tail and soldered all the details, including the SMD. Checked by tapping. Adjustment or repair of the circuits was never required. Obviously due to the fact that the conductors are not built-in, but SMD. There was one repetition that was incomprehensible at first: the setting is going on for the clients. except for ORT and GT, but we do not have it during the run. Turned out to be a faulty tuner. in the UHF range. standard non-propay (converters in our workshop and the client are different)
Sony KV-29FX30K Problem: LED does not turn on blinks 11 times. It turned out to be a punched NOT. I replaced it with BU2508DX and carefully soldered the ring cracks in the TDKS area and the line scan driver. The defect is typical for such assemblies and solder quality
SONY KV-14LM1K chassis FE-2 Malfunction: over time, the sound began to disappear on one, then on a number of programs, the picture remains normal, the flash of the memory chip helped
SONY KV-21B2911K, chassis AE-2 Fault: does not turn on, the LED blinks 13 times, which indicates a malfunction of the vertical scan. Soldering IC1501 did not work. In the course of a detailed examination, the chip resistor R1506 2.2 Kom in the protection harness was replaced
SONY KV-25R1R. Fault: does not exit the standby mode, the LED blinks 6 times. Does not exit the standby mode, the LED blinks 4 times. Replacing the TDKS solved all the problems. 4 times flashes on this model and when there are problems with the CRT
Sony KV-21T5R, chassis FE-1. Fault: we turn it on, after a while the picture begins to narrow at the edges, then the TV goes into standby mode and signals a malfunction, with two, sometimes four and, extremely rarely, five blinks of the LED. It happened that the picture tube simply turned off, but the sound remained, while the LED again indicated errors with two or four blinks. The reason was the destruction of the soldering point (ring crack) on the circuit board on the T531 transformer (according to the diagram)
SONY KV-2155K chassis BE-2A Fault: no raster there is high heat, no sound, voltage 138v, 21v, no 12v. IC802 (7812cv) is faulty, resistor R820.0.47 became 150 ohm, replaced diode D808 with HER207
Sony KV-29FX64X Fault: there is no sound, the raster is narrowed horizontally, pincushion distortion. Reason: short-term transistor 2SC5698 for the correction of the raster next to the NOT, apparently due to the small area of the radiator and the high value of the thermal intensity during operation. With the replacement of the transistor, a larger radiator was installed. The problem of no sound was the spontaneous switching of the sound system from D / K to B / G: in the main menu, the Manual tuning section, you need to change the parameter. PS: from personal experience, I noticed that a significant percentage of failures of TVs of a similar class (Philips, for example), associated with the lack of sound, lie in the problems of line scanning and B / P: non-soldering, ring cracks, high-voltage breakdowns, etc., due to for which the sound system is reset to B / G. If such problems arise, even if everything is in order with the geometry, installation prevention in the SR and B / P will not be superfluous
Sony KV-V2120K (video dual). Fault: when turned on, the indicator blinks and goes out once, the relay clicks and silence is heard. Reason: the Q603 (2SD601 smd) transistor is leaking, the base is leaking. emitter. Replaced by 2SC1815
Sony KV-29C3R. Fault: the image with a predominance of red, the lines of the return path of the beam are visible. Open R3718 (100R) and burst into two parts R3702 (820K) on the CRT board
Sony KV-X2931 chassis AE-1C. Malfunction: smoked. does not turn on. Breakdown of C613 2200 pF in the power supply. Replacement of C613 2200pf x 2KV, Q602 2SD1548, IC601 TEA2260, chip resistor R612 1Khm, as well as 4 electrolytes around this TEA
Other common problems
In addition to power-on and picture problems, Sony Bravia TVs may have other problems. Depending on the degree of complexity, some breakdowns can be eliminated with your own hands, without resorting to the help of specialists.
- No sound. If, after turning on the device, an image appears, but there is no sound reproduction, then the amplifier is definitely out of order. Replacing it is considered simple. it is enough to re-solder the microcircuits.
- Line scan. When a voltage multiplier with a combined horizontal transformer operates under increased loads, the horizontal output stage often breaks down. Signs of this breakdown: the TV does not turn on or off from the remote control, defocused screen image (matrix distortion), spontaneous TV shutdown. To solve the problem, you need to replace the cascade.
Why does not it turn on and what to do?
Sooner or later, Sony TV owners have to face the problem of not turning them on. To find out the cause of the malfunction, you must first of all pay attention to the light signals of the indicators that are lit on the front panel of the device. There are three such indicators in total: green, orange and red. The first lights up when the TV is turned on, the second when the timer mode is triggered, and the third indicates that there is no power. In addition, it may happen that the red indicator flashes, but the device still does not want to turn on and cannot be controlled from the remote control.
To solve these problems, it is necessary to consider in detail the reason for their appearance.
- The indicator is off, the TV does not start both from the button and from the remote control. As a rule, this is directly related to the lack of power in the mains. If the light is off, then it may have burned out, but in this case the device would have functioned normally without indication. Much less often, the equipment does not turn on and there is no glow of the indicators due to a break in the fuse-resistor, to which the voltage of 12 V is supplied. After replacing this part, the TV will start working normally.
- The indicators are blinking, but the device will not start. Continuous blinking of indicators on the panel indicates that the device is trying to diagnose all faults on its own or is reporting an error. You can easily find the decryption for the error codes in the operating instructions for the TV. Usually, such a breakdown occurs when there is a faulty node in the system. Because of this, the central processor automatically blocks the power-on mode. Another reason may be the hibernation of the screen, which was connected to the computer and served as a display.
- All indicators are constantly on, but the equipment does not turn on. Luminous diodes inform the user that all elements of the device are powered from the mains. Therefore, you must first try to turn on the device using the buttons located on the panel, without using the remote control (the cause of the malfunction may lie in it). If such actions did not bring any results, then the breakdown was provoked by the breakage of the resistor, which is located near the processor. To solve the problem, it is enough to replace this element with a new one.
In addition to the above, there are other causes of malfunctions.
- Wear of the power supply circuit due to long-term operation of the equipment. Frequent voltage fluctuations in the network, the negative effects of moisture and an unstable temperature regime in the room accelerate the wear and tear of any household device, and the TV is no exception. As a result of all this, the TV motherboard begins to become covered with microcracks, which provokes the failure of all its elements, including the inverter circuit, which is responsible for turning on the device.
- System failure. Sometimes the operating system malfunctions, and the signal from the remote control is not perceived, which is why the TV does not turn on. To eliminate the breakdown, it is necessary to perform diagnostics by contacting the service center.
- Protection. When this mode is triggered, the device, after trying to start, immediately stops responding to commands. This is usually caused by a failure in the transmission of power from the mains. To turn on the TV, you must first turn off the power by pulling the plug out of the socket, then after a while try to start again.
In order to prevent such problems, experts recommend turning on the device through surge protectors or stabilizers.
Sometimes there is an annoying situation when the TV turned on, a sound is heard, but there is no picture. There can be many reasons for such a malfunction, some of them are quite realistic to eliminate on their own, while others can only be dealt with by a specialist.
- The image is half-screen horizontally. This indicates a breakdown of one of the matrix modules (Z or Y). It is very difficult to carry out repairs at home, since you need to perform a full system diagnosis and replace two modules at once (if one burns out, then this will happen to the other). This usually happens due to poor operation of the power supply, with an unstable voltage in the network.
- There is no picture at all. If sound is heard when the TV is turned on, but there is no image, then most likely the inverter unit is out of order. The cause of the malfunction sometimes lies in the device matrix itself.
Only a master can diagnose this breakdown.
Since replacing the matrix on Sony Bravia TVs is considered an expensive procedure, many equipment owners decide to perform it on their own at home. To do this, it is enough to have skills in handling fragile objects and experience in assembling electronic equipment. In addition, you will need to purchase an original matrix for a specific Bravia model.
The replacement itself will be carried out in several stages.
- First of all, you need to dismantle the failed matrix, gaining access to it by opening the back cover of the device.
- Then, after removing the back cover, carefully disconnect all the cables that are connected to the modules.
- Everything ends with the installation of a new matrix, it is carefully connected to all electronic nodes, connected to the loops. Then the edges of the matrix must be wiped with a damp cloth and set in place, fixing with fasteners. After replacement, check the operability of the TV and the image quality.
Sony TV repair: malfunctions and their elimination
Sony TVs, like any other technology, can suddenly fail. Most often, there is a problem when the device does not turn on, while various indicators blink, the relays click. Such failures usually appear regardless of the service life of the equipment. To eliminate them, you need to know the causes of the breakdown, and then either do the repair yourself or contact the service center.
The repair of any household appliances should begin with determining the causes of the breakdown, this is no exception, and all Sony TV models have a horizontal output stage.
Experts recommend, first of all, to make a visual inspection of the device and clean it.
After that, you can immediately notice burnt resistors, broken capacitors or burnt-out microcircuits.
In addition, electrical measurements of functional units will also help to facilitate the search for the causes of a malfunction.
The following video provides an overview of Sony TV repair when no picture is displayed.
The indicator flashes when the TV is connected to a computer
The TV screen suddenly goes dark or the unit does not turn on immediately. Most likely, the computer has entered “hibernation” mode. It is enough to press any button on the keyboard or move the mouse. The picture will reappear on the TV.
The presence of extraneous sounds when turned on
Sometimes users complain about clicking sounds when turning on a household appliance, this happens if:
- The red light is flashing;
- The light on the TV is off.
A clicking sound is often associated with a spontaneous blocking of the system. This means that some part is out of order, in order to avoid more complex breakdowns, the device is forcibly turned off. Diagnostics of the household appliance is required in order to identify and eliminate the malfunction. The TV master of our service center will carry out repairs at your home. We are dealing with the more popular Philips brands. Rolsen. and also with less-running JVCs. Supra. Akai and others.
Reasons for not working TV
To carry out repairs on your own, you need to find out what the problem is. Each malfunction has its own symptoms:
- It often happens that the indicator is on, but the TV does not turn on. The reason may be an incorrectly selected mode, no signal from the antenna. Worst scenarios are also possible when the microcircuit burns out or one of the blocks fails.
- If the indicator flashes, then it is worth looking for the operating instructions and determine the corresponding malfunction.
- If the TV turns on immediately turns off, then we are talking about power outages.
- The reason that the TV does not turn on, the indicator does not light up, there may be a malfunction of some part.
Let’s figure out what to do with this behavior of a household appliance.
TV does not turn on, indicator signals
After a working day we come home, watch TV, relax. And it does not even occur to me that it could be otherwise: the equipment suddenly stopped turning on. Now you need to take time off from work to take the equipment for repair. And then wait a week or two without a household appliance, feel stress from future expenses associated with a TV breakdown.
Indicator is off
We check the network connection before continuing to troubleshoot. In the case where the connection is made through an extension cord, use a direct connection to the socket. You will have to purchase a new extension cord.
If the connection is checked, then there is a problem with the power supply, or rather, the block circuit is open, the fuse or resistor is damaged. Plasma and LCD TVs from Sony brands face this problem. LG. Samsung and others. Self-repair of a breakdown can be expensive for the owner of the equipment. Restoring the power supply by replacing capacitors or other circuit elements is more profitable than a complete replacement of the unit.
A blown fuse is also a common reason for non-working equipment. This happens with power surges. CRT TVs are especially prone to such breakdowns. It is possible to replace the fuse yourself if it is located in an accessible place, as on the Vityaz model. In order not to rack your brains in the search for a malfunction, entrust the repair of the TV to the Service Center “21st Century”.
The TV does not turn on, the indicator is on
First of all, we check that the AV mode is not turned on, otherwise we switch to TV and watch your favorite program. It didn’t work, then we check for the presence of a signal from the set-top box or antenna. Also check the cable. The TV may not respond to the remote control, in which case replacing the batteries will help. This is all that you can do on your own without the appropriate knowledge.
Invite a technician if you suspect an internal problem. Do not ignore if the TV turns on for a long time. Replacement of a burnt-out microcircuit or restoration of the control unit may be required. For Toshiba brands. Daewoo. BBK this is especially true.
8 (495) 745-24-00
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throughout Moscow and the Moscow region.