Sim Fault (Insert Card) - Ericsson I 888 Trouble-Shooting Instruction

7 SIM fault (Insert card)

7.1 What is a SIM fault?
Attach a fully charged battery and a SIM card to the phone.
• If the phone shows "Wrong card" or "Insert correct card" when started, then
• If the phone shows "Phone lock", then it is locked by the customer with a per-
• If the phone shows "PIN?" or "Enter Pin", then the SIM card is locked with a
• ONLY IF IT SHOWS "INSERT CARD" IS IT A SIM FAULT.
Open the phone and check for liquid damages. If there are no, put the phone back
together using a new SIM holder and try again. If it still doesn´t work open the
phone again. Check the solderings on D600:72-75 (Fig 7.2).
Measure the resistance between the SIM pads in fig 7.1 and ground. Check the
ground on GND by measuring the resistance between GND and another ground
point. It should be approximately 0 Ohm, if it is larger the board is faulty and has to
be discarded. Between SIMVCC-, SIMCONRST-, SIMCONDATA- and SIMCON-
CLK-pads and ground should the resistance be larger than 40 kOhm. If it isn´t,
replace as follow: for SIMMVCC: C625, C626, C627 and R618, for SIMCONRST:
C628, for SIMCONDAT: C630 and for SIMCONCLK: C629, all are class A,fig
7.2.
the phone is SIM locked and can´t be repaired at this repair level.
sonal code. The phone will be unlocked in the reset program in the normal repair
flow.
pesonal code.
GND
SIMVCC
SIMCONRST
SIMCONDAT
SIMCONCLK
4-00021-2/FEA 209 544/5.C
I888, Standard Electrical Repairs
Fig. 7.1
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