Model: KV19TS20
Problem: Snow only; sometimes channels would come in.
I checked the tuner by substitution and it was ok. The voltages on the tuner were ok, but the waveform on the clock pin didnt look right. Q123 the clock inverter was leaky. Replacing it fixed the TV. Q123 = {2SA1175 P/N 8-729-119-76}

Model: KV1985
Problem: has no power
Check: memory ic faulty.[24c02], reset ic faulty.[LR05], dry sold around fly back+power supply, driver transistor collector voltage not present [95v], regulator ic 7805 & 7812 faulty, clean ic cxa1213.remove from pcb & wash with wd-40, rep D1878, rep cxa 1213.

Model: KVEXR10
Problem: Dead, hear clic
The TV had no B+. Replace IC IC651 (STRS6301)

Model: KV20FS12
Problem: Dead
TV was dead and had no standby 7V power. D617 and Q605 were shorted and fuse resistor R602 was open. Replacing them repaired the TV. (R602 4.7 ohm 1/4W 1-249-389-11; D617 MTZJ-T-77-12C 8-719-110-31; Q605 2SK2663 8-729-046-40)

Model: KV20FV10
Problem: No sound
The TV had very little audio, even with the volume turned all the way up. IC402 was defective. IC402 is on the A board. (IC402 P/N 8-759-578-88)

Model: KV20S20
Problem: Dead set
The TV was dead, it had no B+. Q602 and Q603 were shorted and R606 was open. After replacing the parts, the B+ was too high and would not regulate.I found R619 (a 10 ohm chip resistor) to be open. I replaced it and the TV was repaired. Q602 and Q602 P/N {8-729-035-37 2SC5271-royg-f}; R606 P/N {1-260-288-11 .47 ohm 5% 1/2W}; R619 {1-216-001-00 10 ohm 5% 1/10W

Model: KV20S42
Problem: The picture pulls in at the sides.
The width was narrow, but the condition was very intermittent. Moving the chassis up and down would make it act up sometimes and when it did the B+ measured 85V instead of 115V. I found a broken circuit trace between D614 and R644. These components feed the voltage from the control winding on T603 to pin 1 of regulator IC601.

Model: KV20TS27
Problem: When switching to video the video would switch but the audio would not. (Sams 2903)
I located a break in a circuit trace near the front right tune mounting lug. Repairing the broken trace fixed the audio switching problem.

Model: KV20TS27
Problem:: The picture flickers.
The brightness was plusating up and down with screen content change. Replacing the jungle IC did no good. I decided the problem was in the ABL (automatic brightness control) circuit and I started at the ABL pin on the flyback and worked my way through the circuit until I came to the PIC-ABL circuit and I found an open electrolytic capacitor C317. Replaceing C317 repaired the set. (C317 22uf @ 50V P/N 1-126-233-11)

Model: KV20TS29
Problem: Lines at the top 2" of the picture.
There were red, green, blue, and white lines in the top 2 inches of the picture. I checked the capacitors around the Vertical output IC and found C509 to be open. Replacing C509 repaired the set. C509 = 100uf @ 50V

Model: KV20TS32
Problem: Just clicks no picture or sound.
The TV was going into shutdown due to the B+ being too high, 125V instead of 115V. Capacitor C630 had leaked electrolyte and damaged IC602 the power regulator IC. (C630 10uf 50V) (IC602 P/N 1-810-050-11)

Model: KV20VM20
Problem: Won't turn on.
The unit had power but would do nothing. IC103 in the VCR was defective. IC103 supplies 6V standby power. (IC103 AN7806 or KIA78006PI or ECG962)

Model: KV20VM20
Problem:: Picture is ok then goes to snow.
The TV would tune in a channel then it would go to snow only. The tuner was intermittent. When I recieved the new tuner it didn't come with the cable (F-pin) connector on it as the service manual had shown and there was no part number in the manual for the F-pin. Here is the part number for the F-pin connector 9-939-361-01. (Tuner P/N 9-909-004-01)

Model: KV20VM42
Problem: The picture is too big.
The vertical size would start out ok, but after 10 minutes the size would begin to increase and the linearity at the top would stretch. The output stage checked out ok. I found a leaky capacitor C362 in the vertical ramp up circuit. C362 is located on the MA board and is connected to pin 24 of IC501. (C362 P/N 9-882-164-01 2.2uf 50V 105')

Model: KV2182P
Problem: Dead
The TV had power and high voltage but no sound and a black screen. I found a open resistor that supplied power for the vertical circuit. Replacing R855 repaired the TV. (R855 .47 ohm 1/4W)

Model: KV25XBR
Problem: TV has poor sound, control audio, image are good, no noises audio.
If unit has US Sony sound mplx decoder HIC (MTS) module, replace any with any of the following part #'s GenericSBX1637-11, SBX1637A-01/02, SBX1638A-01A, Sony#8-746-371-10/11/20, Hitachi#1381181, RCA#SKUP9102,201632, Zenith#905-2321, Goldstar#OIS0163702A, Sears Canada# 575251381181. Another solution is to discard tiny Sony sound module from board and replace with 2 caps (4.7UF,50v), pin 12 put + of each, and pin 10,pin 11 for -.

Model: KV2657R
Problem: Picture is too dark
The picutre had low contrast and the picture control didn't work. Q005 on the M board was shorted. Q005 is the control transistor for the picture setting. (Q005 P/N 8-729-204-83 or ECG2362 or 2SA1048GR)

Model: KV2670R
Problem: Turns on then right off.
The 135V line was running high and the TV was going into shutdown. The regulator IC was ok. I found an open capacitor C540 that was the cause of the problem. (C540 33uf @ 160V)

Model: KV2790R
Problem: TV clicks but only the sleep light comes on.
The TV turned on, but had no picture or sound and only the sleep LED was on; the controls had no effect. I new the microcomputer IC101 needed vertical pluses to operate, so I checked for them at pin 7 and found that they were missing. I turned up the G2 screen control and had a white raster, so the vertical output was working. I checked for pulses at the base of Q506 the vertical pules transistor and found none there. I found R578 to be open. Replacing it repaired the set. R578 = 4.7K @ 1/4W

Model: KV2790R
Problem: TV takes awhile to come on.
When the power button was pushed the relay would click but there was no high voltage. After 5 minutes the high voltage would come up but low and the longer the TV ran the higher the voltage. I found that C578 the horizontal drive coupling capacitor was the cause of the problem. C578 is a .47uf 50V cap but use a 1uf 100V cap beacuse it will hold up better.

Model: KV27EXR10
Problem:: TV goes dead when hot.
The TV played for 2 hours then the screen went black and lost the sound too. The OSD was still present so I knew the power supply had not gone into shutdown. On the A board, I found loose connections on the A22 connector. This connector feeds video and audio to and from the A/V switch located on the U1 board. Soldering the connections repaired the set.

Model: KV27EXR25
Problem: The picture gets narrow on bright scenes.
The 135V line is low and has no regulation. IC652 is the cause. {IC652 P/N 8-719-156-73 or PS2501-1LB}

Model: KV27FS16
Problem: TV turns on by itself.
The TV will turn on by itself only when the sleep timer was used to automatically turn off the TV. The system control IC001 is the cause. It has a software bug in the timer control section and the IC must be replaced to resolve the problem. The new replacement part number is T-998-607-36. IC001 is located on the MA board. The TV also has a problem with Timer 2 and replacing the IC will fix it too.

Model KV27FX10
Problem: Sound is ok but the screen is black.
I saw a faint letter on the screen and decided to check the G2 screen voltage and found only 150V on it. The 1000V was missing and D508 was the cause. It was shorted and fuse resistor R542 was open. D508 and R542 are located on the D board. (D508 P/N 8-719-300-65, R542 1.8K 1W) By the way, does this model seem strange? This was Sony's early extended definition (line doubler) TV. Few were sold and fewer are still in use.

Model: KV27FX10
Problem: Green band in picture
There was a two inch horizontal green band 6 inches down from the top of the picture. The size would vary with the brightness but would never go away. The video and color circuits checked out ok. The voltages from the power supply measured ok but when my hand touched the heatsink of the main 5V regulator IC I noticed that the heatsink was cold and it should have been hot. The IC was not allowing enough current to pass to run the 5V line properly. Replacing IC2601 on the F board repaired the set. (IC2601 SI-3052 or SI-3522V P/N 8-749-920-71)

Model: KV27HFR
Problem: TV is dead.
The 135V B+ line was down to 90v and the picture was pulled in from all sides, before the TV went dead. I found that R656 a 220K 1/2w resistor had opened. This resistor is located on the G board in the switch mode power supply.

Model: KV27S10
Problem: No picture, does not fill the screen.
The TV did not have enough width and would not tune in the station. The B+ was only 95V. Power control transisior Q613 was shorted. Replacing it restored the TV to normal operation. P/N 8-729-924-90

Model: KV27S25
Problem: Has sound but no picture
The sound was ok but the screen was black and there was high voltage. I turned the screen control up and there was a faint white light on the screen that was brighter at the top and faded out towards the bottom. I thought there might not be any vertical deflection, so I scoped the vertical out IC and there was no output. When I check the voltages, I found the -15V to the vertical IC to be missing. R536 a .47 ohm 1/4w fuse resistor was open. Replacing R536 repaired the unit. R536 (P/N 1-249-377-11)

Model: KV27S42
Problem: Only a tiny picture at the bottom of the screen.
The TV had a faint white screen except for 1 inch at the bottom, which looked like the top of the picture. It almost appeared to be a vertical centering problem. I put the TV into the service mode and checked the values in the EEPROM and they were normal. The vertical centering register could be changed in value and the picture on the screen would move within the inch that was showing. I found the jungle chip IC301 to be the cause on the problem. (IC301 P/N (old 8-752-090-39) 8-752-095-96)

Model: KV27S66
Problem: Picture flashed on and off
The screen would flash on and off and never filled out the height or width. The power on SCR D606 was shorted gate to cathode and all the current had to go through the 6 ohm 10W pass resistor, so the set never had enough power to run right. Replacing D606 reutrned the set to normal operation. (D606 P/N 8-719-108-18 or ECG5418)

Model: KV27TS20
Problem: TV is dead.
The horizontal output transistor Q551 is shorted. I replaced the transistor and had intermittent horizontal drive. I found a bad connection on L507 and soldering it restored horizontal drive. Q551 = 2SD1941

Model: KV27TS20
Problem: TV just clicks.
The relay clicks and the high voltage is present, but there is no sound and the screen is black. D511 the 24V source rectifier has loose solder connections.

Model: KV27TS20
Problem: The remote won't work.
The remote detector IC801 had low output. Replacing it fixed the set. (IC801 P/N 8-742-101-10)

Model: KV27TS20
Problem: Black screen sound ok.
The TV had good audio but the screen was black. I turned the G2 screen up and saw a horizontal line through the middle of the screen. I found loose connections on the vertical output IC501 and loose connections on the yoke plug.

Model: KV27TS20
Problem: Black on the left side and moves right until the whole screen is black
The picture looked like it might have vertical blanking problems. After checking many circuits I found a loose connection on pin 16 of PM501 the protect module. Pin 16 supplies ABL and blank clamp voltages. Soldering PM501 repaired the TV.

Model: KV27TS27
Problem: Dead set
The set would not power up and the fuses were not blown. IC607 and Q615 were shorted. IC607 P/N {8-719-156-12} and Q614 P/N {8-729-927-12}

Model: KV27TS27
Problem: Dead
The standby power supply was dead. D622 was shorted and R647 was open.
D622 (P/N 8-719-510-02)
R647 (P/N 1-249-385-11 or 2.2 ohm 1/4w fusable)

Model: KV27TS30
Problem: Dead
Q551 (horizontal output) shorts after running several minutes or hours. The horizontal drive signal decreases after warmup. Solder poor connections on the horizontal driver transformer and L507. L507 feeds the drive signal to the base of Q551.

Model: KV27TS30
Problem: The picture pulls down from the top of the screen.
Solder poor connections at the deflection yoke plug DY-1.

Model: KV27TS30
Problem: Poor color or wrong color in corners.
The TV had poor purity. Solder the center pin of the degaussing thermistor THP601.

Model: KV27TS32
Problem: Dead
The TV had standby power but when the on button was pushed nothing happened. I measured the voltage on the base of Q604, the relay drive transistor, and I could see a small change in voltage when the on button was pushed. So, I thought the system contol was ok. Q604 was shorted from base to emitter. I replaced it but the relay (RY602) still would not turn on. I remembered that the way the overvoltage protect works is to turn the relay in the power supply off. I checked ovp module PM501 and found pin 1, the latch pin, was shorted to ground. Replacing PM501 got the set going. Q604 (8-729-119-78, 2SC2785-HFE or 2SC3311A) PM501 (1-801-061-11)

Model: KV27TS36
Problem: Dead
The TV had standby +5V. But in checking the voltages on standby regulator IC602, I found no voltage on pin 4 the reset +5V. Replacing the IC repaired the TV. IC602 (8-759-805-37, L78LR05D-MA)

Model: KV27V22
Problem: The TV would click but no sound or picture.
The overcurrent transistor Q563 was shutting down the 9V run line to kill the horizontal drive circuit. Q512, the pincushion output transistor, was shorted. I replaced it, but the TV still went into shutdown. IC351 was making Q512 conduct too much and after replacing it the Tv operated normally. Q512 P/N 8-729-809-29 and IC351 P/N 8-752-076-76

Model: KV27V26
Problem: Dead
The set was dead but no fuses had blown. The standby power was ok as was the main 135V source but the 9v supply only measured 3V. IC641 the 9V regulator was leaky. Replacing it repaired the TV. IC641 is located on the G board. (IC641 8-749-920-58)

Model: KV27V40
Problem: Wont tune in channel 5 when on cable.
I found loose grounds inside the tuner. Solder all circuit board grounds to the metal rail or sides.

Model: KV27V42
Problem: Picture pops in and out.
The TV would intermittently lose the channel it was tuned to. A pop could be heard from the audio when this happened. The tuner was the cause of the problem. (tuner P/N 8-598-431-00)

Model: KV27XBR35
Problem: Dead
The standby power supply voltage was low. C662 a 220uf 35V capacitor was open. The capacitor is located on the G board near the white 7 pin G-4 plug.

Model: KV27XBR45
Problem: TV has lines in the picture.
The picture had horizontal lines in the center, that would move from the center to the top. It looked like there was a vertical sweep problem, because the scanning lines would separate. The jungle IC301 {CXA1477AS}, located on the M board, was causing the problem. {IC301 P/N 8-752-063-50}

Model: KV27XBR45
Problem: No sound.
There was no sound from the speakers, but the monitor audio outs had audio. The TV had loose connections at pins 4 and 5 of CN115. CN115 is located on the A board.

Model: KV27XBR45
Problem: When the TV is turned on it just makes a clicking noise.
When the power button was pushed the TV would turn on and the high voltage would come up, then the power relay would start clicking and there was only a black screen and no sound. With no antenna connected to the TV, the relay would stay latched and there was sound and the channels could be changed. The screen was still black. I turned up the G2 screen control and saw a one inch horizontal bar across the center of the screen. The set had no vertical. The vertical output IC was ok and I found that there was no vertical drive coming out of pin 30 of IC301. IC301 is located on the M board along with the system control IC. Replacing IC301 repaired the TV. (IC301 P/N 8-752-063-50)

Model: KV27XBR50
Problem:: Dark screen, no picture sound ok
The TV had high voltage and the CRT filaments were on. I checked the G2 voltage and it was low. Diode D505 was shorted and resistor R519 was open. D505 and R519 are located near the flyback. (D505 p/n 8-719-976-64) ( R519 2.2K 1W)

Model: KV27XBR95S
Problem: Ther picture has a hour glass shape.
The raster was bowed in on the sides like the pincushion circuit was bad. I found a loose connection on Q605. Q605 is in the power control circuit and is located on the G board.

Model: KV32FS12
Problem: TV comes on with a bright white screen then goes dead.
The TV would turn on with normal sound, but the screen would be very bright with retrace lines and then the set would go into shutdown. The CRT cathodes measured 0V (should be about 135V) and the 200V source was ok. IC702 the CRT drive IC was defective. IC702 is located on the CA board. (IC702 P/N 8-759-562-43 or TDA6108JF/N1B)

Model: KV32FS12
Problem: TV doesn't show any channel numbers and the menu doesn't work.
The OSD (on screen display) was missing. OSD is generated within the microcomputer IC001, so I checked the voltages on pins 35 and 34 which is the OSD oscillator. Pin 35 was 5V and Pin 34 was 2.5V and since they are connected together by L040 a 2.7uH coil I checked the coils resistance and found that the coil was open. Replacing L040 repaired the TV. IC001 and L040 are located on the MA board (L040 P/N 1-408-963-11)

Model:KV32S15
Problem: Poor Picture
The TV had poor contrast, kind of dull looking like the high frequencies were attenuated. The PIP picture was ok. I decided to start at the pip board an found that the TV Y signal going into it was low. I traced the signal back to the video switcher IC402 pin 43 and decided that the IC was defective. Replacing IC402 repaired the TV. IC402 is located on the UA boaed. (IC402 P/N 8-752-072-34)

Model: KV32S25
Problem: Black screen, sound ok
The fuse resistor R536 for the -15V line was burned out. IC561 the vertical output IC was shorted. (IC561 P/N 8-759-980-58 or TDA8172) (R536 P/N 1-249-377-11 .47 ohm 1/6W)

Model: KV32S36
Problem: Dead
The TV was dead; Q601 and Q602 were shorted. R607 and R622 were open. After replacing these parts and before powering up the TV, I checked for shorts on the B+ lines and found the 135V line had zero ohms to ground. The horizontal output transistor Q502 was shorted. I replaced it and fired up the TV. The degaussing relay clicked and the front panel LED blinked and went out there was no high voltage. I found that the 9V power line had only 4.5V on It. IC641 was leaky. I replaced it and everything worked OK. Q602 and Q601 P/N {8-729-019-49} {2SC4834M}, R607 P/N {1-202-933-61} {.1 ohm 1/2W fusible}, R622 P/N {1-205-958-00} {10 ohm fusible}, IC641 {8-749-920-58} {SI-3090CA), Q502 {8-729-035-75} {2SC5148}

Model: KV27SXR10
Problem: TV only clicks, just dead
The TV had high voltage, but nothing else. The 16V line was very low. I found poor solder connections on D683 the 16V rectifier. D683 is located on the G board.

Model: KV32TS20
Problem: The TV had audio but the screen was black.
The high voltage was low and R504 was overheated as was T501. The horizontal drive transformer T501 was defective. Replacing T501 and R504 repaired the set. P/N 1-437-195-11

Model: KV32TS20
Problem: Sound is poor then goes low.
MM201, the MTS IC, located on the A board is bad. The surface mount capacitors are leaking and corroding the board. (MM201 8-746-371-10)

Model: KV32XBR200
Problem: Just goes dead.
The TV would turn on with a bright white screen and then shutdown. The 200V line to the CRT board measured 90V. The 200V source rectifier D534 was shorted and the fuse resistor R553 was open. Replacing them repaired the set. D534 and R553 are located on the A board. (D534 P/N 8-719-302-43) (R553 .47 ohm 1/4w P/N 1-249-377-11)