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 6-24 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
PA and DC-DC Converter Troubleshooting
Y
es
Y
es
No
Y
es
Y
es
Y
es
No
No
No
Check with RF probe
Signal level at PA input
-3dBm?
Check Ireg voltage
(C980)1.3v?
Replace faulty
com
p
onents
Replace
Faulty
component
Y
es
Check VREG=2.8v
Check detector
voltage (C960)
0.6v<V<1.5v
Y
es
Check components
around detector
circuit OK
Y
es
Check R965 & R967
OK?
Check coupler,
isolator & duplexer
OK?
Replace DC-DC
converter
Change
PA
No
Check DC-DC Converter
enable
V
bat=3.6v (C387)
V
CC1 & VCC2
≥
1.5v
Check components
around DC-DC
converter OK?
Replace
faulty
component
No
No
Replace
faulty
component