Table of Contents
Advertisement
NSD-6
Disassembly/Troubleshooting Instructions
Manual Verification
Use WinTesla as follows:
Troubleshooting
Check components in the 1900 MHz receiver chain, from the Duplexer N711, External
LNA V705, Down converter N701, the 128.1MHz CDMA IF SAW filter Z704 and RFI N702.
Check that the RX_IF_AGC RIF Pin 7 (TP112) changes as the receiver input signal level is
adjusted.
NOTE: If any of these components are damaged and are replaced, then the Rx IF AGC
must be retuned.
1900 CDMA Tuning Rx IF Compensation
Description of Test
In this tuning the receiver is calibrated at six different frequencies across the band. Win-
Tesla instructs the Signal Generator to be set at six specific frequencies and a fixed
amplitude. The RX_IF_AGC is adjusted by the phones software to make the best use of
the CAFÉ ADC. The setting of RX_IF_AGC is then read from the phone at each of the six
frequencies.
Definition of Result
The five different values of RX_IF_AGC are stored to EEPROM.
Page 42
Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Issue 1 04/01
Advertisement
Table of Contents
Troubleshooting
