Nokia n-gageqd 服务手册
RH-29
Company Confidential
6b - Baseband Troubleshooting
Nokia Customer Care
Page 26
Copyright ©
2004 Nokia Corporation
Issue 1 05/2004
Company Confidential
"Insert SIM Card" in device display although card is inserted
START
Perform
SIM BB self tests.
Are they OK?
Perform
Phoenix SIM tests.
Are they OK?
Is the SIM
Detection Reliable?
Replace UEM
Replace UPP_WD2
Perform
BB SIM self tests.
Are they OK?
Problem solved?
Check SIM Power Up
sequencing. Is it OK?
sequencing. Is it OK?
Change UEM
Check & clean connector
contacts & pads
Replace connector
Change UEM
Check SIM connector
Is it OK?
Check & clean battery
centre contact. Verify BSI
signal has a steady voltage.
Measure VSIM.
Is it 1.8/3.0V when SIM
interface is powered
up?
Measure VSIM
resistance to GND.
Is it low?
Check C470. Is it OK?
Change VSIM
decoupler, C470
Change SIM ASIP, R470
Check Clk, RST &
DATA at SIM connector.
Are the signals
Check Clk,
RST & DATA between
UEM and the SIM ASIP.
Change SIM ASIP, R496
present?
Are the signals
present?
Analyse signals & look for
errors in rise / fall times due
to wrong fitted / faulty
passives
END
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
R470