Receiver Fault Amps; General Instructions; Path Of The Received Signal - Nokia NSC/W–1/3 Series Disassembly & Troubleshooting Instructions

NSC/W–1/3
Disassembly & Troubleshooting Instructions

Receiver Fault AMPS

General Instructions

Start the WINTESLa software and use it to start the needed RX mode of the
phone. The troubleshooting flow chart is divided into three steps:
– general checking,
– local checking
– RX-chain checking.
Make sure to check all solderings and the presence of all components before
changing an ASIC or filter.

Path of the received signal

Block level listing:
Antenna EXT RF
Duplexer
Low Noise Amplifier (LNA)
RX Filter
First Mixer
116.19 MJz filter
IF amplifer
ACG/Buffer
Second mixer
450 kHz fillter
Buffer/limiter
Baseband (FM detector)
The following fault finding charts are for the receiver chain.
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Path of the received signal
PAMS
Technical Documentation
Original 11/99