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(1) If display LCD lighting is abnormal
Is the function selector in
the CD position?
Do display LCD then light?
(WITHOUT DISC)
NO
Check voltage in the power
supply circuitry.
YES
Is µ-COM reset circuit
nomail
micom
VDD
0V
RESET 0V
CD FUNCTION
YES
Is µ-COM 701pin14 and 15
(OSC) input?
About 0.125 µsec
YES
Is IC201 Pin51 52 53 54 to
72 output waveform normal?
3V
YES
- 2-3 -
NO
• Power supply circuitry
defective
• Check Q516 and CN603
NO
• Reset circuit defective.
• Surrounding circuit
defective.
3V
3V
NO
• X701 defective.
NO
• Pattern defective.
• Display defective.
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