Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
---|---|---|---|---|---|
Sony | STRVX550 | UNIT DEAD EXCEPT FOR STANDBY LED - C824 OPEN, REPLACED | Unit dead except for standby lamp. | ||
Sony | STRVX5 | NO RECEPTION ON FM - Q101 FAULTY 8-729-671-04 | No reception on FM, manual and auto. I found Q101 Defective. | ||
Sony | STRVX550 | REPLACING LITHIUM BATTERY | When replacing bad and leaky back up batteries, while unsol-dering have had the molten solder disperse spraying solder on boards andoutwards to face, hands etc. This is due to the solderwick shorting anddischarging a capacitor across the solderwick. Th | ||
Sony | STRVX550 | NO OPERATION | No operation, no display, but standby indicator does light up.Problem may be intermittent. Same problem happens on STRVX750. | ||
Sony | STRVX5 | PART NUMBER FOR COMPLETE TRANSFORMER MISSING | The service manual lists the part number for the core forthese two transformers and when you order them you get only the core. Aservicer has the coils burned up. Are the complete transformers availableor can we provide specs so they can wind them? The | ||
Sony | STRVX550 | STK3042-II VOLTAGE AMP IC OVERHEATS - ORG. STK3042 OK | I have had a report that the STK3042-II overheats in thisunit, but the original type STK3042, which is NLA from Sony works ok. Anyideas? -HQ COMMENTS: The original STK-3042 also ran very hot. It is not un-common. There is not a big difference between | ||
Sony | STRVX550 | NO CONTROL OF VOLUME, BASS, TREMBLE AND INPUT SWITCHING | Volume was at one set level and would not change. Displaywould change. Also all inputs were being passed through the ASP chip andswitching would not switch the ASP chip. ASP chip had been changed withno success. We had data circuit and strobe into IC | ||
Sony | STRVX550 | RELAY CHATTER | Units power relay would chatter for some time and then wouldfunction properly. Problem may not show again for a few days. | ||
Sony | STRVX550 | STK3042 AND RELATED VOLTAGE AMP ICS IN AUDIO PRODUCTS | I believe that the majority of failures are heat related. Ihave solved this problem in the past by adding a substantial heat sink tothe IC, bonding it with a thermal proxy. This reduced operating temp. by20 degrees C. I believe this greatly improves r | ||
Sony | STRVX5 | LOOSE RADIO OUTPUT | Unit would come on cold and radio functions were fine. Afterapprox one hour, unit would loose all sound in radio modes and had nosignal strength indication. Display was OK. | ||
Sony | STRVX550 | UNIT WILL NOT TURN ON | The unit would not power up. We found IC403/P8 - remotedecoder to be low. This is the RESET pin. This was caused by an openC824 on the main board. Excessive ripple at IC402/P1 & 2 did not permitthe reset circuit to operate properly. | ||
Sony | STRVX550 | INTERMITTENT FM | FM would fade, become static or dissappear. Had turntableconnected and would exhibit same symptom. Several repairs had been made. | ||
Sony | STRVX5 | WRONG PART NUMBER IN MANUALS | Incorrect P/N 1-121-361-00 Correct P/N 1-123-361-00 -HQ COMMENTS: We will issue a Service Bulletin. | ||
Sony | STRVX550 | PREMATURE SPEAKER PROTECTION | When four speakers were hooked up, the unit would prematurelydisengage the speaker relay - about 20dB setting. We found C721 to beopen and causing the problem. | ||
Sony | STRVX5 | PART NUMBER FOR FRONT PANEL ASSY IS NOT IN S/M | Part number for front panel assy is not in S/M but is listedon parts microfische. -HQ COMMENTS: Part number is X-4877-106-1. We will issue a S/B. |