Troubleshooting - JVC CE MANUALXV-N450BUC Service Manual

5.1 ELECTRICAL TROUBLESHOOTING GUIDE
5.1.1 POWER CHECK FLOW
A.
No 5V
Is 3.3VA
section working?
YES
Is 5.6V present at
collector of Q126?
YES
Replace Q126.
SECTION 5

TROUBLESHOOTING

NO
No 3.3VA
Check FR101
Is there a DC voltage at
cathode of D105 or D107?
Replace IC101.
B.
NO
NO
Check D105/D106/D107/
NO
YES
No 3.3VA
Is 3.3VA
section working?
YES
Is 3.3V
present at emitter
of Q121?
YES
Replace Q121.
YES
D108 and replace.
(No.YD118)1-13