Display Faults - Nokia RM-11 Series Troubleshooting Manual

RM-11
Troubleshooting - Baseband

Display Faults

Display
faults
Are the Keyboard
and LCD LEDs
turned on when
mobile terminal is
turned on or when
making a call?
YES
Display
faults,
page 2
©2005 Nokia Corporation
Page 52
Measure VBATT
voltage at R315.
NO
Is it OK?
YES
Set mobile terminal to
Local Mode. Use
Phoenix
Troubleshooting ->
Factory -> Display Test
-> Lights.
Select display, and
select Keyboard.
Measure the driver
signal KLIGHT at
R304.
Is the signal OK?
YES
Check N300, L300,
V300, C302, C303,
C304, R300, R307,
R315, R316, R317,
and X301 connector
Confidential
CC Technical Documentation
Check VBATT line at
X100 connector and
NO
C109
Change UEM
NO
Issue 2 09/2005