CSL EM941, Service Manual, Page: 22 / 40

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Test flowchart of slave SIM card
NO
Replace SIM
card
M6235 may have fault
Could not read
SIM card of slave
Clean or replace
SIM socket
If points of
SIM are OK
NO NO
NO
YES
YES
YES
YES
OK
End
If SIM card is
invalidation
Connect to steady-voltage
power supply to see
if
current is OK
Test if voltage of 4/5 pin of J701
exactly power on is 3V. If pin
1/2/3 has switch of pulse voltage
Replace U101
NO