User Guide

RH-23 Company confidential
CCS Technical Documentation
Page 58 Nokia Corporation. Issue 1 03/2004
LCD1 Illumination Fault
Figure 51: LCD1 illumination troubleshooting
Start
Do the LCD1 lights
switch on?
End
Yes
Check LCD module,
connectors X1100, X1101,
X302 and upper block assy.
Change/fix failing part
Change upper
block flex assy.
Are the lights
working now?
No
Activate lights with
Phoenix and measure
D305 SD pin ~0V and
Brgt pin ~0.6V
No
Change UEM (D200)
Yes
Check V313,
R332 and
R333. OK?
Change/fix
defected
component(s)
Change Hinge
flex assy
N
o
Yes
Measure module
j
igs “hinge” 37 to 39
~3.5 and
Pin 1 = 0.1V. OK?
Yes
No
Check R330, C333,
C331, C330, C332.
A
re the
y
OK?
Change D305
Yes
Change UEM (D200)
Yes
Yes
No
End