Nokia RH-6 Series Baseband Description & Troubleshooting page 66

RH-6
6 - BB Description & Troubleshooting
UI module and touchpad module - LED
TouchPad_LED
Are the display LEDs
working?
Yes
Are the Softkey LEDs
working?
Yes
End
Page 66
Company Confidential
Change UI Module.
No Are the LEDs
working now?
No
Check X302 (solder
joints). Is it OK?
Yes
Measure VLED+ and VLED-.
VLED+ = ~7.2V and VLED- =
~0.5V when LED driver
(N300) is enabled. Are they
OK?
(Notice: VLED+ = VBATT
when driver is disabled)
Change TP Module.
No Are the LEDs
working now?
No
Check X305 (solder
joints). Is it OK?
Yes
Measure VLED+.
VLED+ = ~7.2V when LED
driver (N300) is enabled.
Are they OK?
Yes
Retest
© 2003 Nokia Corporation.
CCS Technical Documentation
Retest failing
Yes
UI Module
No Change X302
Check N300, L300, V300, R300,
No C303, C304 and C305.
If not OK, change defect part
Retest failing TP
Yes
Module
No Change X305
Check N300, L300, V300, R300,
C303, C304 and C305.
If not OK, change defect part
Issue 1 10/2003