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Upper Block Failures - Nokia RH-53 Troubleshooting Instructions

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Nokia Customer Care

Upper block failures

All checks can be done while the phone is partially disamsembled (no need for full reasembly

inbetween debugging steps):

SIM failure (including insert SIM faults)

1. Flex B2B connector pressed in?

2. Change LCD can assembly (for new flex) works?

3. C314 (VSIM cap) short circuitting?

4. C313 (SIMIO cap) short circuitting?

5. Voltages (SIM startup sequence)? Board to Board connector pin17

6. Change main PWB (UEM)?

The hardware of the SIM interface from UEM (D200) to the SIM connector can be tested with-

out a SIM card. When the power is switched on the phone first check for a 1,8V SIM card and

then a 3V SIM card. The phone will try this four times, whereafter it will display "Insert SIM

card".

VSIM – Board to board connector pin 17

Reset – Board to board connector pin 29

Clock – Board to board connector pin 20

Data – Board to board connector pin 19

Ch1 : VSIM

Ch2 : RESET

Check for SIM voltage during power-up

COMPANY CONFIDENTIAL

Ch3 : CLOCK

Ch4 : DATA

RH-53/54

ISSUE 1 09/2004

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Rh-54