User Guide

RAE-6/RA-4
Nokia Customer Care 6 - Baseband Description and Troubleshooting
60 COMPANY CONFIDENTIAL Issue 1 12/04
Copyright © 2004 Nokia. All Rights Reserved.
■ EM troubleshooting (APE)
Phone is in
module jig
Check SYNC/
MODE from
R4202(both
sides), High?
Faulty V4200, R4202, or
N4201. If all these are
connected, replace first
V4200 and R4202, next
N4201.
NO
Check
V15(1.57V),
OK? C4203
Check
V18(1.8V),
OK? C4211
Check
V28(2.8V),
OK? C4202
YES
Check
enable(VFLASH1),
high C2220 1/2
NO
NO
Check
enable(VIO),
high C4819
YES
NO
NO
Check voltage at
L4201(both
sides), 0 V?
Change coil and
retest V15
NO
YES
Change SMPS
chip(N4201) and
retest, OK?
YES
YES
Check caps C4206-4209
& C4211-4212. If OK,
change N4202 and
retest, OK?
YES
Check
enable(VIO),
high? C4819
NO
If capacitors C4200-
C4202 seem to be ok
change V28
regulator(N4200) and
retest, OK?
YES
YES
NO
END
Shortcut in V15
line
NO
Shortcut in
V18 line
NO
Shortcut in V28
line
NO
Fault is in non-reworkable
component. Refer to current
BER handling guidance.
(UEMEK D2200 problem)
Fault is in non-reworkable
component. Refer to current
BER handling guidance.
(OMAP D4800 problem)
If still doesn't help