Zenith XBV613 Service Manual - Page 14
Electrical Troubleshooting Guide
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UPC - 719192169715
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ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) CIRCUIT (1) No 5.3VA No 5.3VA YES Is the FR101 NO Normal? YES NO Is BD101 Normal? Replace FR101 (Use the same ICW) Replace BD101 YES NO Is R101 Normal? Replace R101 YES Is Vcc (9V - 18V) sup- NO plied to IC101 Pin2? YES NO Are D125 normal? NO Is D102 normal? Replace D125 Check or Replace D102 Is there about 2.5V NO at IC103 Pin1? YES NO Is D123 normal? YES NO Is D124 Normal? YES NO Is D121 Normal? YES Power Line of Main PCB is short Replace IC103 Replace D123 Replace D124 Replace D121 3-3
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3-3
ELECTRICAL TROUBLESHOOTING GUIDE
NO
Check or Replace
D102
Replace D123
Replace D124
Replace D121
YES
YES
Is D121 Normal?
Power Line of Main
PCB is short
1. Power(SMPS) CIRCUIT
No 5.3VA
Replace FR101
(Use the same ICW)
Is the FR101
Normal?
Is R101 Normal?
Is BD101 Normal?
NO
NO
NO
NO
NO
NO
NO
NO
NO
Replace BD101
Replace R101
Is D102 normal?
Replace D125
Replace IC103
YES
YES
YES
YES
YES
YES
YES
Is Vcc (9V - 18V) sup-
plied to IC101 Pin2?
Are D125 normal?
Is there about 2.5V
at IC103 Pin1?
Is D123 normal?
Is D124 Normal?
(1) No 5.3VA