User Guide
Table Of Contents
- 6-Troubleshooting
- Table of Contents
- Introduction to NMM-3 Troubleshooting
- General guidelines for NMM-3 trouble shooting
- Diagnostics
- Phone is Dead
- Flash Programming Fault
- SIM Card Fault (Insert SIM / Card Rejected)
- Keypad Fault
- Display Fault
- Illumination Fault
- Charger Fault
- Accessory Fault
- Audio Fault
- Camera Fault
- USB Fault
- GSM900/1800 TX Troubleshooting
- HELGO Troubleshooting
- PA and Antenna Switch Troubleshooting
- GSM900 RX Troubleshooting
- GSM1800 RX Troubleshooting
- GSM900/1800 Synthesizer Troubleshooting
- WCDMA Tx Troubleshooting
- PA and DC-DC Converter Troubleshooting
- WCDMA Rx Troubleshooting
- WCDMA Rx Synthesizer Troubleshooting
- WCDMA Tx Synthesizer Troubleshooting
- GSM/WCDMA Antenna Troubleshooting
- Test Points
- Calibration required when components changed
- BACK TO MAIN PAGE
NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-16 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
USB Fault
Start
Connect a USB device
to phone and check
N401 Vpu goes to 3.3V.
Check VCC
for ~5V
No
Y
es
Is there any
activity on
D+ and D-?
Y
es
No
Check R423, R424,
R410, R413 and
X410. OK?
Y
es
No
Replace
defective part.
Replace N401.
OK?
End
Check R442, L411,
C414 and X401.
Replace if defective.
No
Y
es
Replace
TIKU
No
Y
es