Nokia 3210 Repair Manual page 31

Customer Care Europe & Africa
Technical Services Training Group
USER INTERFACE FAULTS
BUZZER FAILURE
Buzzer failure
buzzer control signal
from MAD 2.8Vpp at
N400 pin 3
Check VDC_OUT
3.9V DC at N400 pin 1 and
"+" at B400
buzzer signal 5Vpp at N400
pin 6 and "-" of B400
Change B400
B400 / board connections broken
Check buzzer control signal from MAD at N400, pin 3: 2.8Vpp / 1kHz
(use WinTesla/Testing/Audio Level 1, 1000Hz)
Check VDC_OUT 3.9VDC at N400, pin 1 and at Plus-pin of buzzer.
Check VBB 2.8VDC at N400, pin 2.
Check buzzer signal at Minus-pin of buzzer: 5Vpp, 1kHz.
Check board connection N400, pin 6 to Minus-pin of buzzer.
Change buzzer if all ok.
Clock time / Ringtone too fast or too slow - B100 faulty
Check Sleepclock 32.768kHz squarewave at C145 – 3Vpp
Check B100, C147, C148, C153, N100.
See Service Bulletin 017 for additional information (value change: capacitors C148, C153).
© 2001 Nokia Mobile Phones
Check
nOK
OK
nOK
OK
Check
nOK
OK
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
Swap the phone because
MAD or PCB might be
the reason
Check connection to
VDC_OUT at V105,
pin 1/16
Check VBB 2.8V DC at
pin 2 of N400
OK
Change N400
Checked by:
CC Training Group
Repairhints
Version 5.0 Approved
Check VBB 2.8V DC
nOK
at C117
Approved by:
Technical Services
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