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Nokia Customer Care
Troubleshooting
Company Confidential
TFE-4/RV-1
Issue 2.0 Mar/2005
Copyright
©
2005 Nokia Corporation
Page 6-5
Company Confidential
Introduction to TFE-4/RV-1 troubleshooting
This document is intend to be a guide for localizing and repairing electrical faults in the
TFE-4/RV-1 device. Firstly there is a brief guide for fault localizing. Then fault repairing is
divided into troubleshooting paths.
Before any service operation you must be familiar with the TFE-4/RV-1 product and
module level architecture. You have to also be familiar with the TFE-4/RV-1 specified
service tools such as the Phoenix service software, flashing tools and software.
General guidelines for TFE-4/RV-1 trouble shooting
Tools needed for troubleshooting
• Service tools (as listed at service tools chapter in service manual)
• Laboratory power supply with current indicator
• Oscilloscope
• Digital multimeter
Low level troubleshooting for Nokia 610/N616
Fault symptom
Source of fault and corrective action
System doesn’t work at all
1
2
3
6
DU doesn’t work/no DU illumination
4
5
DU blank, illumination OK
5
Display is stuck
6
Input-device/HS doesn’t work, no illumination but DU is
working
4
7
Speaker doesn’t work
4
8
Microphone doesn’t work
4
9
SW hangs
6
Bad audio quality
10
No network connection/no service
11
No BT connection
12
No
Source of fault
Corrective action
1
The system cable is not connected to the Radio Unit
Check the cable connection
2 The 2A fuse of the system cable is faulty
Replace fuse
3
Check the supply voltage from the car battery
4 The connection cable is not connected
Check the cable connection
5 The Display Unit is faulty
Replace the DU
6 The SW has hung
Disconnect the system cable of the RU and restart
7 The Handset is faulty
Replace Handset
8 The Speaker is faulty
Replace Speaker
9 The Microphone is faulty
Replace Microphone
10
Check Equalizer settings
11
Check connections to antenna
12
Delete pairing, try to pair device again, BT device
may be faulty