Dicas Reparação
Modelo - Chassis KV2645R
Pesquisa: KV2645R Enviar Dica Resolvida
Resultados 32
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2645RS | INTERMITTENT FOCUS/BRIGHTNESS | After the unit was on for a while, it would intermittentlychange in brightness and de-focus. The problem was caused by intermittentarcing between pin 1/G4-Focus of the CRT and pin 12/G2-Screen. The arcingbetween these two pins was across the glass unde | ||
| Sony | KV2645R | PICTURE SHRINKAGE, REPLACED R520 | Picture shrinks about 1/4 inch - 1/2 inch at the top of thescreen. | ||
| Sony | KV2645RS | VERTICAL SHRINKAGE, REPLACE C518 | Set came in with vert. fold over, and vertical shrinkage.This unit had been worked on by an unauthorized person. I found ECGtransistors in the vertical output circuit. With the Sony sub. trans Q502(8-765-500-00) failed right away. Replacing it with th | ||
| Sony | KV2645R | NO PIC/SOUND, REPLACED D511, R533 AND L510 | The unit had no picture or sound. We found D511/15V rect. tobe shorted and R533 open. The problem was not resolved until L510 wasreplaced, which probably precipitated the problem. -HQ COMMENTS: L510 is off flyback in 15V line circuit. | ||
| Sony | KV2645RS | AUDIO POP ON CHANNEL CHANGE, ADJ T207 | Loud audio pop on channel change, power on, or power off.Changed T207 on A board, this reduced pop somewhat, but did not eliminateit. Adjusted T207 while changing channels to eliminate popping. | ||
| Sony | KV2645R | THUMP IN AUDIO WHEN CHANNEL CHANGED, REPLACED C226 | Two KV-2645Rand static in audio. The thump was kind of twang or dampered osc to it. | ||
| Sony | KV2645R | DEAD, REPLACED FBT | FBT (2) transformers were replaced the same week on twodifferent units for excessive vibrations or singing. Wedging did nothelp. | ||
| Sony | KV2645R | SOUND DISTORTION | Two transformers were replaced the same week on two differentunits for excessive vibrations or singing. Wedging did not help. | ||
| Sony | KV2645R | POPPING SOUND ON CHANNEL CHANGE, REPLACED T207 | Servicer had replaced T207, hoping to cure a highly inter-mittent sound loss problem. Set was returned to shop and I noticed apopping sound on channel change. | ||
| Sony | KV2645RS | JAIL BARS, REPLACED C539 | Jailbars faint under normal viewing conditions. Problembecomes obvious when camera fades to gray, or picture and brightnesscontrols are placed at minimum. Jailbars are then observed in graduallylightening shades of gray from left to right across the CR | ||
| Sony | KV2645RS | NO LAST CHANNEL MEMORY, REPLACED LEAKY D-26 ON MD BOARD | Last station memory is lost when the set is turned off. | ||
| Sony | KV2645RS | NOISE LINES ON THE SCREEN, REPLACED YOKE | Lines visible at left side of screen, one inch wide andvertical. All channels exhibited the lines. | ||
| Sony | KV2645R | AUDIO POP NOISE, REPLACED T207 | When changing channels, a pop occurred at the speakers.Sound was normal otherwise. Troubleshooting revealed a signal distortionat IC202 Pin 5 that is synchronized with the muting input at Pin 4. | ||
| Sony | KV2645RS | NO UHF, REPLACED PRESCALER BT-981 | No UHF, VHF OK. All voltages and pulses present exceptTP-59. | ||
| Sony | KV2645RS | LOW BRIGHTNESS, REPLACED R751 | Low brightness, like weak CRT. |