Nokia 6255 Description And Troubleshooting page 74

6255/6255i6256/6256i (RM-19)
Baseband Description and Troubleshooting
The error "SIM card rejected" means that the ATR message received from the SIM card is
corrupted (e.g., data signal levels are wrong). The first data is always ATR, and it is sent
from the card to the mobile terminal.
SIM faults
Is the SIM a 3.0V or
1.8V card?
YES
Measure VSIM at
X2700 pin 3. Is it 3V
or 1.8V?
YES
Check SIM power-up
sequence. It should
look like the
following picture:
Page 74
Replace used test
NO
SIM card
Check SIM reader
NO
X2700
If not as picture
©2005 Nokia Corporation
Measure VSIM at
NO
C2203. Is it 3V?
YES
Replace R2700
VSIM
Reset
Clock
Data
Company Confidential
Nokia Customer Care
NO
UEME failure
Issue 2 05/2005