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 6-27
Company Confidential
WCDMA Tx Synthesizer Troubleshooting
Replace
VCO
Synth
OK
Probe VCO o/p
3900Mhz
Span 1MHz
RF Level= -17dBm
V
CO o/p signal
<-17dBm?
Check o/p signal on 1GHz
Span. Signal found on
correct frequency?
Check with meter VCO
control voltage R914=
0V?
VCO control
Voltage >4V
Check balun output
& VCO solder joints
OK?
Replace
VCO
Check
V
cc= 2.8v
ExtReg1
Baseband
Troubleshooting
Check VCO loop
filter components
OK?
Replace faulty
components
Check synth serial
interface on Tex
Tex
Troubleshooting
Replace faulty
components
Replace
VCO
Replace
VCO
Y
es
Y
es
Y
es
Y
es
Y
es
No
Y
es
Y
es
No
No
No
No
No
No
No
Y
es
Y
es
Phoenix Settings:
Tx Contol (WCDMA)
Algorithm mode
Start Level = 0dBm
Channel= 9750 (1950MHz)
Click SEND