Dicas Reparação
Modelo - Chassis KV2781R
Pesquisa: KV2781R Enviar Dica Resolvida
Resultados 14
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2781R | LOSES VIDEO AND AUDIO, RESOLDER IF TRANSFORMERS AND GROUNDS | LOSES VIDEO AND AUDIO. | ||
| Sony | KV2781R | INTERMITTENT LOSS OF H OUT TRANSISTOR, REPLACE C-578 | Short life for horizontal out transistors. May last from afew days to many months. Found C-578 decreased in value altering thedrive signal. -HQ COMMENTS: This is the decoupling cap located on the base of theHorizontal Drive transistor. | ||
| Sony | KV2781R | INTERMITENT CONTROL FUNCTIONS, REPLACE LEAKY C PACK, CP-104 | Intermittent Picture, Volume, and Channel Up/Down. | ||
| Sony | KV2781R | PIN-CUSHION PROBLEM, RESOLDER R-577 (H SIZE CIRCUIT) | Customer complaint was that they could not see the channelnumbers and the volume control lines were not straight. | ||
| Sony | KV2781R | POPPING SOUND IN AUDIO, REPLACE IC-101 ON "A" BOARD | Popping sound in audio when changing channels. Also, whenMUTE button pressed, audio level would go high and stay high until volumelow function was pressed or set was turned off. | ||
| Sony | KV2781R | NO PINCUSHION, REPLACE R-536 ON "D" BOARD | Picture bowed in at sides (pincushioning). | ||
| Sony | KV2781R | DEAD, REPLACE R-555, D-557 AND CRT | The neck of the tube in this unit and a continuous arcing.This was the probable cause of the shorting of D557 and the opening ofR555. | ||
| Sony | KV2781R | DEAD, RESOLDER H DRIVE TRANSFORMER | Set came in dead, scoped horiz osc and I had an output, scopedhoriz driver Q551 collector and had an output. Scoped base of horizoutput, found no signal. Traced problem to driver (secondary) trans-former. | ||
| Sony | KV2781R | DEAD, REPLACE IC-001 AND D-1662 (NO STANDBY 5V) | The remote detector IC001 shorted and D1662 was defectivecausing no stand by 5 volts. The set would not turn on. | ||
| Sony | KV2781R | NO REMOTE, REPLACE IC-0001 ON "M" BOARD | The remote control would not operate this unit. | ||
| Sony | KV2781R | DARK PIC AND SATURATED RED, REPLACE PICTURE TUBE | Picture very dark, color saturated with red. Brightnesscontrol and picture control have very little control on brightness level.Had to crank G2 to maximum to get brightness. Occasional arcing, 30 minsinterval. | ||
| Sony | KV2781R | PICTURE BRIGHTNESS PULSED, REINSTALL ANODE CONNECTOR | Picture brightness pulsed intermittently, accompanied by aticking sound. | ||
| Sony | KV2781R | SHUT DOWN, RESOLDER HLC L-515 | Upon turning set on, the unit would immediately shut downsubbing ref voltage and sensing voltage to Pins 4 and 12 on IC301, setwould still shut down. Froze different section of A board. When HLCgoes as frozen set would stay on. Upon unsoldering HLC, f | ||
| Sony | KV2781R | POOR PURITY, REPLACE CRT | Pink in upper right hand corner. Could not adjust purityin upper right hand corner, tried using magnets, no help. I hit the CRTwith my hand and could see shift in purity. |