SERVICE BULLETIN
NO:04003
2004/04/21
MODELS :
TX-SR502/502E/8250/HT-R520
SUBJECT :
The countermeasure against IC oscillation.
Symptom:
TX-SR502's output sometimes has a hum with signals after power on within
few minutes.
When selector or DSP mode is switched to another at this moment, the protect
program starts.
Cause:
Oscillatation of IC regulator.
Procedure for service:
To exchange an electrolytic capacitor with that of 330uF for C6412 in NADG-
8230.
Circuit No.
Before
change
After change
Parts No.
Description
Parts No.
Description
C6412
394741007
ELECT C
CE04W16V10M
394743317
ELECT C
CE04W16V330M
Marking: No change
Application:
TX-SR502(B) MDD, MDC
HT-R520(B) MDD, MDC #1-
HT-R520(S) MDD, MDC #1-
