Dicas Reparação
Modelo - Chassis
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Resultados 81652
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1545R | INTERMITTENT RETRACE LINES IN PICTURE, REPLACED R722 | After the unit was energized, fine retrace lines wouldappear after 5 seconds and there was no control of brightness. G2voltage would not go low enough and G1 voltage was 125V DC instead of 30VDC. Wrong value resistor had been inserted in board (R722) i | ||
| Sony | KV1217 | INCORRECT TUNING OPERATION, REPLACED R078 | In program mode, pressing tune-up button would cause a changein address position only and could not program any channels. Also, nochannels could be put into or removed from memory. | ||
| Sony | KP5020 | DEAD | DC block assy failure (distorted waveform) DC fuses open. | ||
| Sony | KP5000 | DEAD, REPLACED MICA SPACER UNDER VERT OUTPUT TRANSISTOR | 2.5 amp fuse on B+ line would blow every 7 to 10 days.Replacement of the fuse restored operation and hours of testing providedno clue to problem causing fuse to open. By by-passing the relay witha jumper and using a variac, increasing AC input to 130V A | ||
| Sony | KV2645R | SNOW PICTURE, REPLACED BT981 PRESCALER | Unit goes to snow. Substituting tuner didn't cure problem.Voltages around front end seems to be at spec. Tried prescaler andthat solves the problem. | ||
| Sony | KV2645R | POOR REMOTE OPERATION, REPLACED Q1 | Remote would operate intermittently and is usable up to6 feet from cabinet. Q1 on head amp board noisy - collector voltage onQ017 on MD board was varying between 4 and 8 volts. | ||
| Sony | KV2601 | SNOW PICTURE, REPLACE C209 | Snowy picture on all channels. Uncontrollable RF, AGC:measuring DC potential at Pin 5 of IC201 (CX555) netted approx. 2.5VDCwith no change upon varying RF AGC potentiometers. Measuring C209 outof circuit yielded approx. 20 microamperes leakage. | ||
| Sony | KV1945R | INCORRECT TUNING OPERATION, REPLACED ZENER D008, Q006, Q008 | Unable to tune any VHF/UHF stations. | ||
| Sony | KV1945R | POOR REMOTE OPERATION, REPLACED C4 | The range of the remote control was no more than about8 feet. There was excessive noise seen at output of N board, remoteamplifier. | ||
| Sony | KV1913 | DEAD | Came dead with shorted horizontal output and fuse. Replaceparts, plug to variac and slowly raised line voltage. Current wasexcessive showing short on the circuit, but doesn't show on the ohmmeter.Found bad flyback. | ||
| Sony | KV1545R | NO TUNING, REPLACED PRE-SCALER | No signal on any channel except sound on Ch. 13 only. Ifexternal voltage was introduced to VC line I could get some of the highband channels, which indicate tuner was good. | ||
| Sony | KP7220 | INSUFFICIENT WIDTH, REPLACED IC-2003 "K" BOARD | Unit suddenly had insufficient width to fill the screen.Voltage on 115V regulator on K board was about 10 volts low. | ||
| Sony | KP5000 | POOR PURITY | Color purity problems around edge of picture. Problem wascaused by flaking of phosphor edges on all three CRTs. | ||
| Sony | KV2645R | INCORRECT OPERATION, REPLACED X002 | When master power switch turned off and unit allowed to cooldown, it would take approx. 2-3 hours for any function to operate afterapplying power. Cooling the ceramic osc. X002 would cause unit to shutdown and all functions became inoperative. | ||
| Sony | KV2645R | PICTURE DARK WITH EXCESSIVE COLOR, REPLACED R-751 | Color overload or flaming color. Color was especiallyextensive mostly in the red spectrum. Even when the color was turneddown, some overload still existed. |