Troubleshooting Guide
Electrical Parts Troubleshooting Guide
Possible Trouble 1
The unit does not operate.
Is the Trans output power | NO |
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| • Check the wiring diagram. |
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AC 220V? |
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| YES |
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| NO |
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Is the Trans output power | Is shorted the Trans. output? |
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| • Check the Main |
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about AC 14V? |
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| PCB pattern. |
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| YES |
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| YES |
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| • Exchange the Trans. |
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Is output Voltage of IC01D | NO |
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| • Exchange D02D~D05D. |
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| • Exchange IC01D. |
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DC 12V? |
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| YES |
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| NO |
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Is output Voltage of IC02D |
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| • Exchange IC02D. |
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DC 5V? |
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| YES |
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Is the reset circuit all right? | NO | |
(The No.16 of |
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Micom is 5V.) |
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| YES |
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Is the
connection between NO Main and Display
all right?
YES
NO
Is the voltage No.20 of Micom
DC 5V?
• Exchange IC01A, C02A.
•Connect connector exactly.
•Check the PCB pattern.
YES
Exchange Main PCB Ass'y.
Service Manual 28