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Chapter 9 – UHF1 Low Power Service Information
Table of Contents
Section 1 Troubleshooting Charts
1.0 Troubleshooting Flow Chart for Receiver ............................................................ 1-1
2.0 Troubleshooting Flow Chart for 25W Transmitter................................................ 1-4
3.0 Troubleshooting Flow Chart for RFIC .................................................................. 1-5
4.0 Troubleshooting Flow Chart for Rx VCO ........................................................... 1-10
5.0 Troubleshooting Flow Chart for Tx VCO............................................................ 1-13
Section 2 UHF1 PCB/Schematics/Parts List
1.0 Allocation of Schematics and Circuit Boards ....................................................... 2-1
1.1 UHF1 25W Circuits......................................................................................... 2-1
2.0 UHF1 (403–470 MHz) 1–25W PCB/Schematics/Parts List ................................. 2-3
UHF1 (403–470 MHz) 1–25W 84012735001-A Top Side...................................... 2-3
UHF1 (403–470 MHz) 1–25W 84012735001-A Bottom Side................................. 2-4
UHF1 (403–470 MHz) 1–25W Overall Schematic Diagram ................................... 2-5
UHF1 (403–470 MHz) 1–25W Receiver Front-End Schematic Diagram ............... 2-6
UHF1 (403–470 MHz) 1–25W Receiver IF Amp Schematic Diagram.................... 2-7
UHF1 (403–470 MHz) 1–25W Transmitter Power Amplifier Schematic Diagram .. 2-8
UHF1 (403–470 MHz) 1–25W Power Control Schematic Diagram....................... 2-9
UHF1 (403–470 MHz) 1–25W Transmitter Power Amplifier DC Distribution
Schematic Diagram....................................................................................... 2-10
UHF1 (403–470 MHz) 1–25W RFIC Schematic Diagram .................................... 2-11
UHF1 (403–470 MHz) 1–25W Receiver VCO Schematic Diagram...................... 2-12
UHF1 (403–470 MHz) 1–25W Transmit VCO Schematic Diagram...................... 2-13
UHF1 (403–470 MHz) 1–25W VCO Buffer Schematic Diagram .......................... 2-14
UHF1 PCB 84012735001-A Parts List 1–25W..................................................... 2-15