Troubleshooting Guide
ELECTRIC PARTS TROUBLESHOOTING GUIDE:
Possible Trouble 1
Is the Trans input power AC 115V?
YES
Is the Trans output power
about AC 14V?
YES
Is output Voltage of IC01D
DC 12V?
YES
Is output Voltage of IC02D
DC 5V?
YES
• The unit does not operate.
NO |
| • Check the Fuse. |
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| • Check the wiring diagram. |
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NO |
| NO |
| • Check the Main |
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| Is shorted the Trans. output? |
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| P.W.B pattern. |
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| YES |
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| • Exchange the Trans. |
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NO |
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| • Exchange D02D~D05D. |
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| • Exchange IC01D. |
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NO | • Exchange IC02D. |
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Is the reset circuit all right?
(The No.14 of Micom
is 5V.)
YES
Is the
connection between
Main and Display
all right?
YES
NO
NO
• Exchange IC01A.
•Connect connector exactly.
Is the voltage No.18 of Micom | NO |
| • Check the P.W.B |
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DC 5V? |
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YES
Exchange Main P.W.B Ass'y. 
Service Manual 20