PF768, Standard Electrical Repairs
4/00021-2/FEA 209 544/11.C
33
(68)
6 SIM (“Insert card”).
6.1 What is SIM fault?
Insert a charged battery and a functional SIM card into the phone. Start it up by
pressing the On/Off key.
•
If the phone displays “Wrong card” or “Insert correct card” in the display it
means that the phone is SIM-locked and it can’t be repaired at this level.
•
If the phone displays “Phone lock” it means that the customer has locked the
phone with a personal code. The phone is unlocked in the reset part of the test
flow.
•
If the phone displays “PIN:” or “Enter PIN” it means that the SIM card is
locked with a personal code.
•
Only if the phone displays “Insert card” there’s a SIM fault.
6.2 Measuring VSIMPAD.
Measure the voltage between pin 8 and 10 of the system connector (~4.9V, fig. 6.1).
•
If the voltage is too low or missing, proceed to section 6.3.
•
If the voltage is correct, proceed to section 6.4.
Fig. 6.1
6.3 VSIMPAD voltage too low or missing.
Open the phone and check for liquid damages, especially around the system connec-
tor pads.
Measure the resistance of R724 (class A, ~47 ohms, fig. 6.2).
