Troubleshooting Guide
Electrical Parts
Troubleshooting
Guide
Possible Trouble 1 | The unit does not operate. |
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Is the
Trans input power AC 115V? NO (208/230V for LWL1230WAL)
YES
•Check the Fuse.
•Check the wiring diagram.
Is the Trans output power | NO | Is shorted the Trans. output? | NO |
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about AC 14V? |
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| PCB pattern. |
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| YES |
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| • Replace the Trans. |
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Is output Voltage of IC01D | NO |
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| • Replace D02D~D05D. |
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| • Replace IC01D. |
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DC 12V? |
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| NO |
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Is output Voltage of IC02D |
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| • Replace IC02D. |
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DC 5V? |
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| YES |
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Is the reset circuit OK? | NO | |
(The No.14 of |
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Micom is 5V.) |
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| YES |
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Is the
connection between NO AC and DC
OK?
YES
NO
Is the voltage No.18 of Micom
DC 5V?
• Replace IC01A, C02A.
•Connect connector exactly.
•Check the PCB pattern.
YES
Replace AC PCB Ass'y.
Service Manual 31