Dicas Reparação
Modelo - Chassis KV25XBR
Pesquisa: KV25XBR Enviar Dica Resolvida
Resultados 95
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV25XBR | LOOSE COLOR AFTER TWO HRS OF OPERATION | loose color in several channels after two hrs of operation. | ||
| Sony | KV25XBR | COLOR BEAT INTERFERENCE AND HERRING BONE | Color beat interference on ch. 27, 28, 29. Only on cable,seems to be chassis pick up related, and temperature related. Cooling ofIC201 fixes problem. -HQ COMMENTS: Try following countermeasures: 1) Readjust RF AFC, RV201.2) Change C203 value to 7PF. | ||
| Sony | KV25XBR | NO VIDEO | No video, all other functions OK. Video present at input ofIC301, but no video at output. Pin 35, IC301 had 2.7VDC causing blanking,this voltage was caused by shorted EVP transistor Q1504 and open zenerdiode D1505. | ||
| Sony | KV25XBR | MUTED RASTER AND SOUND. | IC1501 was shorted and R1552 was open. This was a very dif-ficult problem to troubleshoot because there was no raster at all and thesound was muted. The RGB and sleep LEDs were also lit. With all thesesymptoms you could be led to the system control ci | ||
| Sony | KV25XBR | COARSE PICTURE | Coarse looking picture and improper interface. | ||
| Sony | KV25XBR | DEAD SET, REPLACED Q1524 | The horiz. output device Q1528 would short out shortly afterturn on. If set was operated with 90VAC applied, you could service itwithout immediate failure of Q1528. Waveform inspection revealed distor-tion at collector of Q1528 relating to problem in d | ||
| Sony | KV25XBR | WHITE VERT. LINES ON CABLE | Group W Cable of Chicagoline on both sides of screen about 3/4 wide. | ||
| Sony | KV25XBR | NO RASTER/NO SOUND BUT HAS HIGH VOLTAGE | Unit comes on with sleep time LED and RGB LEDraster, no sound but had H.V. Found there was no +40V on D board. | ||
| Sony | KV25XBR | VERTICAL JITTER | This unit had a one inch vertical jitter when playing copyguarded tapes on a Fischer VCR (Model FVH 839). | ||
| Sony | KV25XBR | INTERMITTENT DISTORTED DISPLAY ON SCREEN AT RANDOM | After set got warm, on occasion the channel numbers mightflash on and off on the screen. Also, weird words appeared on the screenwhere you normally would view the time and date. There was no set patternof words nor did they spell out anything, just a j | ||
| Sony | KV25XBR | DEAD UNIT | Unit came in dead. Found rectifier shorted, D655 on GB bd.Still did not have 140VDC. Convertor output okay, problem has to be T652or T653 on GB bd. I could see connector output up to C655 on GA bd(both sides) but not on T653 or T652. Not sure which o | ||
| Sony | KV25XBR | IMMEDIATE SHUTDOWN | Shorted cap causes immediate shutdown. | ||
| Sony | KV25XBR | NO OPERATION OF FRONT PANEL BUTTON CONTROLS EXCEPT FOR POWER | On screen display would always indicate MTS status whenattempting to change other controls. Switch has high resistance, andshows signs or corrosion. | ||
| Sony | KV25XBR | VERTICAL JITTER | This unit had a vertical jitter on a satellite antenna. Out-put from dish was low (about 3/4Vpp). Customer has two 25XBR TVs. Theother one does not jitter. The output at IC1501 Pin 20 was about 5Vpp. | ||
| Sony | KV25XBR | INTERMITTENT VERT | We have received a few reports of intermittent vertical. Theproblem is that C1519 on the D board is poorly soldered. |