Improper Lcd Display - Panasonic UF-490 Service Manual

4.2.

Improper LCD Display

START
Check connectors: CN5
(SC PCB) and CN51 (PNL PCB).
Is LED/LCD displayed?
NO
Does CN5, pin 3 on the SC
PCB measure +5 VDC?
NO
Replace the SC PCB.
Is the trouble
resolved?
YES
END
YES
YES
NO
Replace the
Power
Supply Unit.
Does the display appear normal?
YES NO
Replace the LCD
Module.
END
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