Nokia 6150 Service & Repair Hints page 23

Speaker
No / quiet / distorted receiving audio signal
•
Check the mechanic of speaker, contacts, membrane, soiling
•
Check resistance of speaker (about 30Ω)
Microphone
No / quiet / distorted transmitting audio signal
•
Check contacts of microphone
•
Check resistance of microphone (about 800Ω)
X300
•
Check soldering
•
Check contacts (change connector if bent)
X100
•
Check microphone spring contacts
•
Check soldering
V103
•
Check resistance from MIC N or MIC P to ground (about 1KΩ and 2KΩ)
change component if resistance is 0Ω
C266
•
Check MIC BIAS voltage 2.8V DC collector V 250 if audio is active (use WINTESLA / testing / audio)
version 1.0 / 19.10.1999
CONFIDENTIAL Service & Analysis Center Europe
Training Team
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