Electronic Parts Troubleshooting Guide
: The unit does not operate.
Possible Trouble 1
–52–
YES
YES
YES
NO
YES
Is the input voltage
of transformer AC220V?
Is the input voltage
of IC01D DC14V?
Check the FUSE
and the wiring diagram
Check the RY-COMP PIN 3
and CN-4WAY PIN 1
Is the output voltage
of IC01D DC12V?
Is the PIN 29 of
Micom DC5V?
Exchange Micom
YES
NO
Check the main P.C.B
pattern
NO
NO
Exchange D01D-D05D
NO
YES
Exchange
the transformer
Is shorted the
transformer output?
NO
YES
Is the output voltage
of IC02D DC5V?
NO
Is the PIN 55,64 of
Micom DC5V?
YES
Exchange IC01D
Exchange IC02D
NO
Check the 5V P.C.B
pattern
Is the output voltage
of transformer about AC14V?
Exchange IC01A
