User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 86
Issue 1 06/01
3 DL2 UI Troubleshooting
3.1 CMT and keypad illumination problems
Each CMT–display and keypad LED has its own driver. If there is problems with
one or more
– Keypad–LED: check resistors R203–R208, transistors V213, V203, V204 and
the LEDs.
– CMT–LED: check resistors R200–R202, transistor V206 and the LEDs.
If the illumination does not work at all, measure voltages VB and KBLIGHTS.
VB should be the same as VBATT and KBLIGHTS approximately 2.5V when
the LEDs are supposed to be on. If these voltages are not correct, problem is in
hinge flex, connector X001 or on BL8 (see 2.23 in this document).
3.2 CMT LCD Troubleshooting
CMT LCD
Check
faulty
Display
CMT LCD or LCD Flex
Display
YES
NO
YES
NO
OK?
OK?
END
Problem in
C002, R003, X007
Make sure that the display flex is
connected to X007
probably damaged
Replace LCD.
Hinge Flex, connector X001
or BL8
Refer to chapter
2.23
Figure 74.