[Sony Service]

                             Technical Services

                       Electronic Service Information

                           Field Problem Reports

  ------------------------------------------------------------------------
                             FPR Number: P1285
                         Submitted by: WOODFIN, B.
                                Engineer: LD
Model(s):
STRD311

Subject:     FAILURE OF RIGHT CHANNELS OUTPUTS - REPLACED C756
Symptom:     111
Last Update: 2000-11-14
Status:      Closed

Customer Description:
In a prior field problem report, I reported that the right channel was
going out. We found Q755, Q762 and Q763 shorted. This unit is back for the
3rd time. Monitoring the voltage across R776, we found that after a few
minutes it would start to rise. When freeze spraying C756 voltage would
return to normal.
Solution:
Although this worked in this case. We have tried this solution and it has
met with little success in resolving the problem. Clipped the lead on C756
and the unit is OK after about 4 hours of operation at 55W. C756 is
against Q755 and Q757. Mounting C756 on the bottom of the Board away from
heat appears to have solved problem.
Technical Description:

Part's Information:
 P/N           Description               Reference     Board    Symptom

 110298900     D12/68PF, 5% 500V         C756          MAIN
