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NSD-6
Disassembly/Troubleshooting Instructions
Manual Verification
Use WinTesla as follows:
Troubleshooting
If this tuning fails, it is probably the highest power level indicating that there is a gain
loss in the transmitter path. This could be caused by many transmitter faults. Check the
PA N605 output Pins 11,12,13,14 (TP104) are not shorted to ground. Note this should be
done with the phone switched off. If these pins are shorted the PA must be replaced, and
it is likely that inductor L618 will have burnt out. Also check that the Tx VHF LO (TP105)
and UHF LO (TP106) are present at the correct frequency and level (see the AMPS Tuning
Tx Power Levels section).
NOTE: If any of these components are damaged and are replaced then the Tx IF AGC
must be retuned.
Tx Output spectrum at RF Connector with 30dB attenuator on Spectrum Analyzer:
Page 34
Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Issue 1 04/01
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Table of Contents
Troubleshooting
