Dicas Reparação
Modelo - Chassis FD42A
Pesquisa: FD42A Enviar Dica Resolvida
Resultados 7
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | FD42A | DEAD UNIT, REPLACED IC601 AND Q602 | The unit came in with an absence of 32V at IC601/pin 13.Replacing IC601 solved the problem but severe keystoning appeared.Replacing Q602 solved the distortion. -SOLUTIOIN: Replaced IC601 875980239 and Q602 872911155. -HQ COMMENTS: 32 volts on IC601 | ||
| Sony | FD42A | EJ BOARD P/N | Part number needed for EJ board, blank former type(without resistor). All three service manuals/FD-42A list only one partnumber for EJ board: 1-621-293-11 and this is for New Type board(with place for resistor). There is no listing for former type EJbo | ||
| Sony | FD42A | NO PIX, REPLACED Q802, D802, IC601 AND Q602 | 1. No picture. 2. No high voltage. 3. Bad keystone.1. Weak drive signal on Q801 base.2. Open Q802.3. No drive of pin 5 (IC601) open Q602. | ||
| Sony | FD42A | NO VIDEO, RESOLDERED Q401 | Cold solder on collector of Q401. | ||
| Sony | FD42A | PICTURE DISPLAYED KEYSTONE, Q602 | Picture displayed keystone problem, more severe with batteryoperation than with AC adaptor. See picture. Picture severely pulled intoward center at top of raster, from both sides. Waveform at collector ofQ602 was distorted. Resistance between E to B | ||
| Sony | FD42A | RV851 AND RV502 ARE REVERSED | Vertical size adjustment control RV851 and keystone adj.RV502 are reversed. That is, RV851 is the keystone adj. and RV502 is thesize adj. Schematic is correct. -HQ COMMENTS: We will publish a correction on this. | ||
| Sony | FD42A | KEYSTONE, REPLACED D602 | Unit had keystone problem, traced problem to base of regulatorQ602. Had a 5Vpp (mostly negative) waveform, nothing at collector.Found diode D602 open, not clamping negative half of waveform. |