| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV32XBR50 | NO PICTURE, ONLY CHARACTER DISPLAY, CHECK THE IK LINE | Sometimes at turn on the screen was black but would show theon screen display. Turning up G-2 revealed a barely visible rasterexhibiting extreme pincushion distortion. Also, three retrace lines at thetop of screen caused by improper data buss activity. | ||
| Sony | CDP291 | INTERMITTENT STATIC IN AUDIO | Intermittent static in audio (especially in high frequency). | ||
| Sony | KV2791R | SHUT DOWN, REPLACE R-507 | When the brightness and picture controls are high, Pin 6 ofIC-301 would drop to 2V, then the set would shut down. | ||
| Sony | DTC300ES | NO DISPLAY | Minus 24 volt power supply fails. Gary in Costa Mesa showedme one that had all three components defective. -24 volts is lost whenQ-908 and Q-907 short, this I think causes C-915 to open. Gary says thisis the second unit he has had with this problem. | ||
| Sony | KV27XBR15 | DEAD, REPLACED Q-503 AND REPAIRED COLD SOLDER JOINTS | Unit was dead, found shorted H output transistor andcold solder joints on H. Drive transformer. | ||
| Sony | KV20EXR10 | LOW BRIGHTNESS, RESOLDERED R-741 ("C" BOARD) | Very low brightness. Looks like color only. RGB pulses arevery low. R-741 leads were not penetrating completely through the boardcausing misoperation of Q-711 thus sending a wrong IK pulse to pin 25 ofIC-301. | ||
| Sony | STRD2020 | NO LEFT CHANNEL AUDIO | No left channel audio. Traced audio back to IC-307 still didnot have audio. Went to IC-301 pins 2 and 27 had audio. Thought IC-301or IC-307 had to be bad because the digital path was still sending rightchannel audio throughout digital 1 PCB until it b | ||
| Sony | KV32HSR10 | SHUTS DOWN, "F" BOARD Q-651 E-B OPEN | Shut down. Found B+ 135V running between 136 and 142vdc. Iknew either the load was open or our B+ was not regulating. Removed the Fboard from the TV and jumped RY-601. I used a 60 watt lightbulb as my loadon the +135 volt line. Using the variac while mo | ||
| Sony | CDPC201 | NEW SPINDLE MOTORS ARE BENT | Vertical jitter on RF waveform (eye pattern) after spindlemotor replacement. This is caused by a bent spindle shaft. There is nopacking material to protect the spindle shaft. Out of the last ten motorsreplaced, 6 were noticeably bent but could be used | ||
| Sony | KV27TW71 | DEAD, REPLACED C-550 | Set was dead. Inspection of waveforms at base of Q-550, hori-zontal drive transistor was about 1Vpp. Service manual shows 4Vpp. | ||
| Sony | CDP391 | STATIC IN OUTPUT AUDIO | After warm up, static in the right channel was heard. | ||
| Sony | KV27EXR10 | NO COLOR - CHANNEL 3, REPLACE COMB FILTER CM-1301 | Unit had no color channel 3 only. All other channels ok.Voltage at pin 6 is approximately 4vdc. Disconnected R-445 and insert DCand color would appear, however, color on other channels is bleeding. | ||
| Sony | KPR46DX10 | UNIT INOPERABLE, REPLACED HIGH VOLTAGE BLOCK. | Set would click but nothing else. Found Q-1 shorted.After replacing Q-1, everthing worked normally for 15 minutes. Then, Q-1shorted again. Disconnected inputs to high voltage block and transistordid not short. | ||
| Sony | GV300 | MISSING CURTAIN CAUSING HORSESHOE SHAPED LIGHT IN LCD DSPLY | The unit was brought to an independent shop for a missing pix-el problem. The shop changed the LCD display. The customer then noticeda horseshoe shaped light in the LCD display. The shop changed second LCDthe problem is the same. | ||
| Sony | KV20TS20 | INTERMITTENT PICTURE DISTORTION, OPEN C-501 | Intermittent picture distortion - Christmas tree effect. |