Power Does Not Stay On Or The Mobile Terminal Is Jammed - Nokia RM-11 Series Troubleshooting Manual

RM-11
Troubleshooting - Baseband

Power Does Not Stay on or the Mobile Terminal is Jammed

Mobile
terminal is
jammed
Measure VIO,
VCORE, VFlash1,
VANA, and VR3
voltages. Are they
OK?
YES
Measure 32kHz
Sleep Clk test
points. Are they OK?
YES
Measure 19.2MHz RF
Clk testpoint. Is it
OK?
YES
Measure PURX and
SleepX. Are they
high (1.8V)?
YES
Mobile
terminal is
jammed,
page 2
©2005 Nokia Corporation
Page 46
Check VBATT, VIO,
VCORE, VFlash1,
VANA, VR3 capacitors.
Are they OK?
NO
YES
Check BSI/BTEMP
lines and VBATT lines.
If OK, reflow or
change UEM
Measure the 32kHz Clk
NO
crystal. Is it OK?
YES
Reflow or change UEM
Measure the 19.2MHz
Clk coming from the
NO
VCTCXO at C502. Is it
OK?
YES
Check R517, R521,
and D527. Are they
OK?
YES
Change UPP
Is PURX OK?
NO
YES
Is SleepX OK?
YES
Confidential
CC Technical Documentation
Repair
NO
Change B200
NO
Check G503, G505,
C520, C503, R511,
NO
R512, R518, R553. If
OK, change G501.
Repair
NO
Change UEM
NO
Change UPP
NO
Issue 2 09/2005