Zenith XBV613 Service Manual - Page 50
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UPC - 719192169715
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DVD PART ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER CHECK FLOW A. No 5V B. No 3.4VA. NO Is 3.4VA section working? YES Is 5.6V present at collector of Q126? YES Replace Q126. No 3.4VA Check FR101 Is there a DC voltage at Cathode of D105 or D107? NO Replace IC101. NO Is 3.4VA section working? YES NO Is 3.4V present at emitter of Q121? YES Replace Q121. YES NO Check D105/D106/D107/ D108 and replace. 3-57
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3-57
ELECTRICAL TROUBLESHOOTING GUIDE
DVD PART
1. POWER CHECK FLOW
No 3.4VA.
No 3.4VA
Is 3.4VA section working?
Is 3.4V present at emitter
of Q121?
Replace Q121.
Replace IC101.
Is there a DC voltage at
Cathode of D105 or D107?
Check FR101
No 5V
Is 3.4VA section working?
Replace Q126.
Is 5.6V present at collector
of Q126?
NO
NO
YES
YES
YES
Check D105/D106/D107/
D108 and replace.
YES
YES
A.
B.
NO
NO
NO