User Guide

Nokia Customer Care Troubleshooting Instructions
Company Confidential RH-30/RH-31
Issue 2 11/2004 © 2004 Nokia Corporation. Page 49
Figure 42: Illumination fault troubleshooting 2
Start
Are the keyboard
LEDs working?
Are the display LEDs
and/or Flashlight
working?
Change X301
Check X301 connector
contacts and solder
joints. Are they OK?
Change UI PWB
Are the LEDs working now?
No
VLED
No
Ye s
No
No
Flashlight
Retest failing UI PWB
Check V311,V312,
R311,R312 and R307
If not OK, change
defect part
Ye s
KB LED
Ye s