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?
Does CN5, pin 3 on the SC
PCB measure +5 VDC?
Replace the SC PCB.
Is the trouble
resolved?
END
NO
NO
NO
Replace the
Power
Supply Unit.
YES
YES
Does the display appear normal?
YES
YES
Replace the LCD
Module.
75
NO
END