Buzzer Failures - Nokia 3210 Service & Repair Manual

Buzzer failures

check buzzer control signal
from MAD 2,8Vpp on N400
pin 3, use WINTESLA /
testing / audio / level 1,
1000Hz
oK
Check 3,9V DC VDC_OUT
on pin 1 of N400 and "+" of
B400
oK
check buzzer signal 5Vpp
on pin 6 of N400 and "-" of
B400 (use same settings)
oK
change B400
B400 / board connections broken
Check the buzzer control signal from the MAD on pin 3 of N400 2,8Vpp 1KHz
Level 1, 1000Hz)
Check VDC_OUT 3,9V DC pin 1 N400 and "+" of buzzer
Check VBB 2,8V DC on pin 2 N400
Check the buzzer Signal on "-" of buzzer 5Vpp 1KHz
Check the board connection pin 6 of N400 to "-" of buzzer
Change the buzzer
version 1.0 / 05.11.1999
CONFIDENTIAL
Buzzer failure
swap the phone because
not oK
MAD or PCB should be the
reason
Check connection to
not oK VDC_OUT on V105 pin 1,
16
check VBB 2,8V DC on pin
not oK
2 of N400
oK
change N400
Service & Analysis Center Europe
Check connection to VBB
not oK
2,8V DC on C117
(use WINTESLA / testing / audio
Training Team
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