Dicas Reparação
Modelo - Chassis V25
Pesquisa: V25 Enviar Dica Resolvida
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV25XBR | NO PICTURE, SOUND. SCREEN DISPLAY INDICATED PICTURE | Screen was black. Remote inoperative, front panel controlsinoperative except for power on/off. Only thing that screen displayedpicture. | ||
| Sony | KV25XBR | PURITY CHANGES WITH SET DIRECTION | When set turned East, top right corner turns magenta, bottomright turns green. Also slight cyan ring present on entire face of tube. -HQ COMMENTS: Smaller pitch CRTs require narrower landing tolerances.Follow procesure: 1) face CRT EAST, turn set ON 2) | ||
| 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 | KV25DXR | INTERMITTENT HORIZONTAL SQUEAL | This unit has an intermittent horizontal squeal. | ||
| 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 | KV25DXR | SERVICE MODE PROBLEMS AND NO REMOTE OR FRONT PANEL CONTROL | 1) This unit would not go past #19 in service mode. 2) Therealso was no remote or front panel controls and no display. Only power on/off worked. Found solder blob across S2001 section #4 connecting IC2005Pin 21 to 38 all the time. Pulling on wires fr | ||
| Sony | KV25DXR | INTERFERENCE IN PICTURE | This unit had an interference pattern in the picture, like aherring bone. | ||
| Sony | KV25DXR | NO RGB OPERATION WITH PC-701 | Inside the PC701 Pin 2 is shorted to Pin 28 with a shortingwire. In the DXR Pin 2 is 5 volts and Pin 28 is ground. | ||
| 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). |