Nokia 6150 Service & Repair Hints

CONFIDENTIAL
Service & Analysis Center Europe
Training Team
version 1.0 / 19.10.1999 Page 22 of 41
X300, board to board connector
• Check soldering
• Check contact springs, change component if bent
D200, MAD
• Check buzzer signal on Pin 97 (200mV pulses) use WINTESLA / testing / audio
Level 1, 1000Hz
B100, 32.768KHz crystal
• Change component if ringing tone speed is to low or high if a call comes in.
If you pick a ringing tone from the menu, the speed is normal.
• In this case, also the clock is running wrong if the phone is switched off.
Internal Audio Failures
microphone
doesn't work
Internal audio failure
speaker doesn't
work
(receiving audio)
check impedance
of speaker (30
Ohm)
check solder of
N250, COBBA or
change if
necessary
change speaker
resolder or change
X300 if any spring
is bended
check contacts
and impedance of
microphone (800
Ohm)
change
microphone
check soldering
and contacts of
X100
resolder or change
if necessary
check MIC BIAS
voltage, 2,8V DC if
audio is active
change C266
check if MIC N or
MIC P is short
circuited to ground
change V103
check solder of
N250, COBBA or
change if
necessary
not Ok
Ok
not Ok
Yes
Yes not Ok
Ok
not OK
Ok
not Ok
Ok
not Ok
Ok

Nokia 6150 Specifications

General

Brand	Nokia
Model	6150
Category	Cell Phone
Language	English