Nokia 3210 Repair Manual page 19

Customer Care Europe & Africa
Technical Services Training Group
PHONE DOES NOT SWITCH ON: SECTION DC/DC CONVERTER
Phone does not switch
on, section: DC/DC
converter
Check VB (Battery
2.4V-3V) on L102
OK
Check soldering
and resistance of L102
"0 Ohm"
OK
Check connection
between L102 to R132
(0 Ohm)
OK
Check pin 3 from V105
on="low"status 0V
OK
Check voltage at
V101 anode 2.6V;
cathode 3.2V
OK
DC/DC converter is ok!
continue with
section CCONT
© 2001 Nokia Mobile Phones
Check connector X101/
nOK
X102 change if bent or
soiled
Resolder or change L102
nOK
Swap the phone if the
nOK
connection is open
Check V109 and the
respective voltage deviders
nOK
R131,132,134,143,144
Check 600kHz
switching frequency at
nOK
pin 4,5,12,13 of
V105
Yes
Check 1.2V operation voltage at
Pin 15 of V105
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
nOK
nOK
Checked by:
CC Training Group
19 (48)
Repairhints
Version 5.0 Approved
Check soldering of V105 or
change if necessary
Check soldering of V105 or
change if necessary. Also
check R102, R105, R112
Approved by:
Technical Services