User Guide

CCS Technical Documentation Troubleshooting — BB
RH-17
Issue 1 04/2003 Nokia Corporation Confidential Page 37
Power doesn‘t stay on or the phone is jammed
Measure VIO,
VCORE, Vflash1,
VANA, and VR3
votages. Are they
OK ?
Measure 32kHz
Sleep Clk from
testpoint .
Is it OK?
No
Yes
Measure
19.2MHz RF Clk at
testpoint J499.
Is it OK?
Yes
No
Measure PURX
and SleepX at test
points J402 and
J403. Are they
high (1.8V) ?
No
Yes
Jammed
page 2
Phone is
jammed
Check VBATT,
VIO, VCORE, VFlash1,
VANA, VR3 capacitors.
Are they OK ?
See phones top view
diagram for cap
location.
Measure the
32kHz Clk crystal.
Is it OK?
Measure
the 19.2MHz Clk
coming from the
VCTCXO at C524.
Is it OK ?
No
Check BSI/BTEMP
lines and VBATT lines
if OK re-flow or change
UEM
Repair
Change B200
Re-flow or Change
UEM
Change UEM
No
No
No
Check G501, C505,
C520, C502, C523,
C525, C524, R511,
R510, R512, R520,
R521, R522, R517,
R518, C503, V500.
If OK change G501
Change UPP
Yes
Yes
Yes
Yes