Phone Is Jammed - Nokia NHM–7 Series Troubleshooting Instructions

NHM–7
Troubleshooting Instructions

Phone is jammed

Phone is
jammed
Measure
VIO, VCORE, FLASH1,
VANA, VR3 voltages.
Are they OK ?
Yes
Measure
32.6kHz Sleep Clk
from testpoint J404
Is it OK ?
Yes
Measure
13MHz RFClk from R420.
Is it OK ?
Yes
Measure PURX
signal from testpoint J402
Is it high (1.8V)?
Yes
Jammed
Page 2
Page 10
Check VBATT1–6
VIO, VCORE,
FLASH1, VANA,
VR3 lines. Are
No
they OK?
Yes
Measure
No
32.6kHz Sleep Clk
from B200.
Is it OK ?
Yes
No
Measure 26MHz RFClk
from C660.
Is it OK ?
Yes
No
E Nokia Corporation
PAMS Technical Documentation
Check
Z260 – Z265
No
C260 – C265
BSI / BTEMP
lines and
VBATT lines
Check BSI /
BTEMP lines. If
OK –>
UEM regulators
are not working
Change UEM
No
Check B200,
C209, C210
Change UEM
Check R661,
No
C661, R660,
C660 if OK
change G660
Check R420,
C420 if OK
change N600
Change UEM
Issue 1 10/2001