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
CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-9
Company Confidential
Replace the UI-
module. Are keys
workin
g
now?
Are the UI-
module keys
working?
Y
es
No
Y
es
Continue
Retest the faulty
UI-module.
Y
es
No
Check X400 solder
j
oints and spring
contacts. OK?
Replace
X400
No
Measure ROW0 –
ROW5 lines from
X400. Are voltage
levels ~1.8V?
Measure SLEEPX signal
on testpoint J301
when a key is pressed.
Is voltage level ~1.8V?
No
Y
es
When a key is
pressed, do the
LED’s illuminate?
Check ROW0 – ROW5
lines from X400. If OK
replace TIKU.
No
No
End
Illumination
Fault