Chapter 4: Troubleshooting
Troubleshooting Tables
4-28 Service Manual
4.4.3.4 Blank Black Screen (with No Alarms)
4.4.3.5 Display Arrow Present after Installing New LCD
4.4.3.6 Black Background Has Red, Green, or Blue Tint
Possible Causes Step Troubleshooting Procedure Comments
Loss of 12V to
Control PCA
1.
Check to make sure the LED7 light is lit on the
Control PCA. If the light is red, then the LCD module
is receiving power.
LCD backlight is not
connected to the
LED driver board on
the Control Board
2.
Check the power cable between the Control PCA
and Power PCA for correct pins. (Refer to section
“6.13 Wiring Diagrams”.)
Power cable part #:
6600-1567-700
3. Check fuse F7 on Power PCA.
Needle nose pliers,
Ohm Meter
4.
Check backlight connection to the LED driver
board.
5.
Replace the Control PCA. If backlights still do not
work, replace LCD module.
Possible Causes Step Troubleshooting Procedure Comments
Protective film on
LCD
1.
Disassemble Electronics Enclosure and Remove
protective film on LCD.
Possible Causes Step Troubleshooting Procedure Comments
Bad LCD cable
connection
1. Check LCD cable connection at Control PCA (J1).
2.
If OK, check the LCD cable connection at LCD
module.
Defective LCD Cable 3. Remove and replace LCD Cable
LCD Cable PN:
6600-1412-600
To Next Page
Loading...
Need help?
General
