Display - Lcd And Backlights - GE PANDA Service Manual

Possible Causes
4.4.3 Display – LCD and Backlights
4.4.3.1 White Display, Striped Display, or Color Shift
Possible Causes
Poor LCD cable
connection
4.4.3.2 Distorted Display: Test or Random Pattern
Possible Causes
Main application
software not loaded
4.4.3.3 Dim or Non-uniform Light
Possible Causes
Bad LCD backlight
Service Manual
Step Troubleshooting Procedure
Using DMM, back-probe J26 pins 1-3 or 2-4.
8. Depending on dimmer pot setting, voltage range
will be 8 to 12 VAC.
9. If no lamp voltage, replace transformer assembly.
Step Troubleshooting Procedure
1. Check LCD cable connection at Control PCA (J1).
If OK, check the LCD cable connection at LCD
2.
module.
3. If OK, replace LCD module.
Step Troubleshooting Procedure
1. Reload main application code (MAP software).
Step Troubleshooting Procedure
The backlight may not be connected to the LED
driver board mounted on the Control Board. Check
1.
to make sure connections are mated correctly as
well as any bent pins.
If OK, disconnect the LCD cable at the Control PCA.
2.
Turn on unit and examine for nonuniform lighting.
Chapter 4: Troubleshooting
Troubleshooting Tables
Comments
Comments
LCD Cable PN:
6600-1412-600
Comments
Comments
4-27