Motorola Tarpon V. 120C, Service Manual, Page: 3 / 81

V.120c
© 2001 Motorola, Inc. 3
Product Description 4
CDMA Dual Band Trimode Phone 4
General 4
V.120c Logic Circuit 5
Key Features of the Wally IC 5
Key Features of the CCAP IC 5
V.120c RF Circuit 6
Theory of Operation 7
AMPS 7
Receiver Circuitry 7
Receiver Audio 7
Transmitter Audio 7
Transmitter Circuitry 8
CDMA Cellular (800Mhz) Mode of Operation 8
Receiver Circuitry 8
Receiver Audio 8
Transmitter Audio 8
CDMA PCS (1900Mhz) Mode of Operation 9
Receiver Circuitry 9
Receiver Audio 9
Transmitter Audio 9
Transmitter Circuitry 10
Frequency Synthesizer Circuitry 10
Transmit Power Control Circuitry 10
Audio Logic Block Diagram 11
RF Side Block Diagram 12
Disassembly Procedure 13
Introduction 13
Recommended Tools 13
Disassembly Procedure 13
Assembly Procedure 13
Troubleshooting 17-58
Replacement Parts 59
Mechanical Exploded Diagram 59
Contents