Upper Block Failures - Nokia RH-53 Troubleshooting Instructions

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
18
Check for SIM voltage during power-up
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Ch3 : CLOCK
Ch4 : DATA
RH-53/54
ISSUE 1 09/2004