Sim Card Related Failures - Nokia NSE-6 SERIES Service Manual

NSE–6
Disassembly & Troubleshooting Instructions

SIM card related failures

The hardware of the SIM interface from MAD2 (D200) to the SIM connec-
tor (X451) can be tested without a SIM card. When the power is switched
on and the BSI line (J122) is grounded by a resistor, all the used lines
(VSIM, RST, CLK, DATA) rise up to 5 V four times. Thus "Insert SIM card"
faults can be found without SIM card.
The fault information "Card rejected" indicates that ATR message (the first
message is always sent from card to the phone) is sent from card but the
message is somehow corrupted, data signal levels are wrong etc. or fac-
tory set values (stored to the EEPROM) are not correct.
Voltage < 1.5 V at C120 when
BSI resistor is connected
VSIM, DATA, RESET and CLOCK lines
(J252, J116, J118, J117) rise up to 5V
after power on
VSIM, DATA_O,SIMRST_O and SIMCLK_O lines
rise up to 5V after power on at pins of SIM card
SIMPWR, SIMRST_A, SIMCLK, SIMIO_C
lines (J112, J113, J114, J115) rise up to 2.8 V
after power on
MAD2 (D200) or PCB is faulty
Page 18
Insert SIM card failure
YES
YES
NO
NO
NO
Technical Documentation
NO
Check R120. R122, C120,
Battery connector
YES
Check SIM card and SIM
reader connectors
YES
Check
R124, R125, R128, X451
YES
Faulty circuit
N100 (CCONT)
PAMS
Original 08/98