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Cordless Telephone
Beaver M254
Service manual
PYE Beaver M254 Service Manual
Vhf fm mobile
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Contents
Table of Contents
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Table of Contents
Table of Contents
General Information
Summary of Data
Introduction
Equipment Variations
Module Identification
Installation and Operation
Pre-Installation Checks
Netting Procedures
Test Frequency Crystal Information
Contents List (Installation Items)
Installation Procedure
Fig. 2.1 Typical Installation (Front Mount)
Fig. 2.2 Basic Installation Front & Remote Mount
Fig. 2.3 Basic Installation Motorcycle
Operation
Technical Description
Receiver Circuit Summary
Fig. 3.1 Receiver Block Diagram
Transmitter Circuit Summary
Fig. 3.2 Transmitter Block Diagram
Power Distribution and Switching
Fig. 3.3 Power Supply Block Diagram
Control Panel (Front Mount)
Control Unit (Remote Mount)
RF Front End
Oscillator Modules
12-Channel Oscillator
Single Channel Oscillator
6-Channel Oscillator
PA Module
Antenna Filter and Changeover Relay
Replacement of Plug-In Modules
Use of FM Beaver Test (Extension) Assemblies Kit
Fault Finding - Integrated Circuits (IC's) and Thick Film Circuits (Tfs)
Antenna Loading
Receiver Oscillator Multiplier
Transmitter Exciter
Construction
Fig. 4.2 Mechanical Construction
Equipment Access
Tools Required
Procedure
Module Replacement
Fig. 4.3 Facility Socket Interconnections
Test Equipment
Fig. 4.4 Diode Probe Circuit Diagram
Fig. 4.5 Connection of AF Output Meter
Crystal Information
Alignment Procedure and Performance Checks
Test Points (Tps)
Measuring Points (Mps)
Identification of Modules and Components
Signal Generator Levels
Intermediate Frequencies
Multiple Channel Equipments
Multimeter
General Preliminary Checks and Adjustments
Receiver Alignment
Transmitter Alignment
Change of Frequency Procedure
Receiver Performance Checks
Audio Sensitivity
Audio Power Output
Bandwidth
Squelch
Frequency Count
Sinad Measurement
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Service Manual
Pye Telecommunications Ltd
Beaver
VHF FM Mobile
Radiotelephone
Types M254 & M256
Publication Ref No.TP271
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Beaver m256
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