RH-53/54Nokia Customer Care16 COMPANY CONFIDENTIAL Issue 2 06/2005Copyright © 2005 Nokia. All Rights Reserved.Upper block failuresAll checks can be done while the phone is partially disassembled (no need for full reasemblyinbetween 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 pin176. 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 andthen a 3V SIM card. The phone will try this four times, whereafter it will display ”Insert SIMcard”.VSIM – Board to board connector pin 17Reset – Board to board connector pin 29Clock – Board to board connector pin 20Data – Board to board connector pin 19Check for SIM voltage during power-upCh1 : VSIMCh2 : RESETCh3 : CLOCKCh4 : DATA
