Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/21 B 18(26)
7 SIM Problems
7.1 What is a SIM-problem
Insert a functional SIM-card and a charged battery into the phone.
If “Wrong card” or “Insert correct card” is displayed on the display when starting the
phone it means that the phone is SIM-locked and cannot be repaired at this level.
If the phone displays “Phone lock” on the display it means that the customer has locked the
phone with a personal code. The phone is unlocked by the reset part of the functional test.
If “PIN:” or “Enter PIN:” is displayed on the display it means that the SIM-card has been
locked with a personal code.
There is only a SIM-fault if “card error” is displayed.
7.2 Type of problem
Open the phone and check for liquid damage.
Replace J603.
Measure the resistance from pin 1 to pin 5 of J603 (>1 Mohms).
If the resistance is incorrect, replace C734 and C736.
If the fault remains, replace C735.
If the voltage at R734 (2.75 V) is incorrect, measure the resistance of R734 (10 kohms).
If the resistance is incorrect, replace R734.
Measure the resistance at R733, from the side close to R624, to pin 1 of J603 (15 kohms).
If the resistance is incorrect, replace R730.
Measure the resistance at R733, from the side close to R624, to pin 7 of J603 (33 ohms).
If the resistance is incorrect, replace R733.
Measure the resistance at R731 (at the side close to R624) to pin 2 of J603 (33 ohms).
If the resistance is incorrect, replace R731.
Measure the resistance at R732 (at the side close to R624) to pin 3 of J603 (0 ohm).
If it is incorrect, replace R732.
If the fault remains, send the unit on according to the local company directives.
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