User Guide

Nokia Customer Care Troubleshooting - Baseband
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Issue 1 - Revision 002 09/2004 ©2004 Nokia Corporation Company Confidential Page 41
Display Faults
Display
faults
Display
faults,
page 2
Are the UI module
and display LEDs
turned on when the
phone is turned on
or when making a
call?
Measure KLIGHT at
J300, Vbat at C312,
and Pout at C313.
Are they OK?
If Vbat is not OK,
check the battery. If
Pout is not OK,
check N300.
Measure R300, R301,
(~6.3). Check V300
and V301.
Measure the
KLIGHT.
Is the signal OK?
Change UEM
Check N300.
Measure R300 and
R301 should be 1.5
X Vbat. Is it OK?
NO NO
YES
NO
YES
YES
Check X300 and
Z300.
YES
Replace
NO
Replace
NO
YES
Change N300
NO
Change LEDs
YES