Dicas Reparação
Modelo - Chassis STRAV550
Pesquisa: STRAV550 Enviar Dica Resolvida
Resultados 7
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | STRAV550 | NO AUDIO OUTPUT - IC802 DEFECTIVE | Q809 and Q810, which is the regulation line on the main board,didn't have 16v, only - 8v at collector of Q810. I unplugged connectorCN004 of the input board, and the regulator became normal. I found IC502defective on the input board. | ||
| Sony | STRAV550 | PROTECTION LIGHT ON - IC701, R707 FAULTY | Fuseable resister R707 (100 ohm) over-dissipated in thepower board. IC701 defective. IC701 had -41Vdc at pin 12 causing on theoutputs. | ||
| Sony | STRAV550 | PART NUMBER CORRECTION IC-402 | Part number for IC-402 on main PCB, location C/5, isincorrect. | ||
| Sony | STRAV550 | DOESN'T TUNE AM OR FM | Would not tune AM or FM. Display verified acceptance of keycommands. Substitution of VC tuning voltage proved signal circuits ok.Q-207 active low pass filter did not respond to normal PWM signal. For-cing the gate of this transistor to 4.8V (normal is | ||
| Sony | STRAV550 | DESIGN OF AC INPUT SECTION | If VZR-901 were to short and thus cause F-902 to open, unitwill still function normally. However, there will be no surge protectionany longer. It is very likely that customer would not realize that F-902had opened and would not bring unit in for servic | ||
| Sony | STRAV550 | DEAD UNIT | No oscillator IC351 found 5.5V on base of Q803. Q803 notturned on so no reset. | ||
| Sony | STRAV550 | NO TUNING | No tuning (AM/FM). VT read approx. 28V. Opened PLL loop andapplied external DC to VT and unit would tune. CLOCK, B+, OSC IN, DATA &LATCH were OK. There was no voltage change on Pin 7 (VT out of PLL). |