Nokia 3210 Repair Manual page 36

Customer Care Europe & Africa
Technical Services Training Group
If other SIMcard problems appear, check the following signals at SIMcard reader pins:
SIMclock (pin x), SIMdata (pin 4) – but note:
These signals are only present when SIMcard is active (e.g. when phone registers to the network).
SIMreset (SIMRST_0) is low active, which means that SIMcard will be reseted when SIMreset is 0V.
This is the case after switching on the phone (see next diagram).
While VSIM is already high, SIMreset keeps low for a few milliseconds – in this time SIMcard will be reset.
© 2001 Nokia Mobile Phones
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
Checked by:
CC Training Group
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Repairhints
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Technical Services