Panasonic UF-7300 - Improper LCD Display

100
UF-7300/7200
UF-8300/8200
4.2. Improper LCD Display
• LCD Contrast Adjustment
1. Press the “FUNCTION”, “7” keys.
2. Select “8: MAINTENANCE?”, and press the “Set“ key to enter the Maintenance mode.
3. Select “6: LCD BRIGHTNESS?”, and press the “Set“ key.
4. Press the “ (Lighter)” key or “ (Darker)” key.
5. Press the “Set” key or the “Stop” key.
Replace the SC PCB.
Is the trouble
resolved?
Replace the Low
Voltage Power
Supply Unit.
Is the trouble resolved?
Check connectors on the SC PCB,
and PNL PCB.
Is LED/LCD displayed?
Does the display appear normal?
Replace the LCD
Module.
Replace the
Panel.
Does CNP501, pin 11 on the
SC PCB measure +5 VDC?
Ye s
Ye s
Ye s
Ye s
Ye s
No
No
No
No
No
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