Nokia 6150 - Phone Book; Storing and Managing Contacts

CONFIDENTIAL
Service & Analysis Center Europe
Training Team
version 1.0 / 19.10.1999 Page 23 of 41
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)