PYE Beaver M254 VHF FM Mobile Manuals

Manuals and User Guides for PYE Beaver M254 VHF FM Mobile. We have 1 PYE Beaver M254 VHF FM Mobile manual available for free PDF download: Service Manual

PYE Beaver M254 Service Manual

PYE Beaver M254 Service Manual (99 pages)

VHF FM Mobile

Brand: PYE | Category: Cordless Telephone | Size: 9 MB

Table of Contents

Table of Contents
4
General Information
8
Summary of Data
8
Introduction
10
Equipment Variations
11
Module Identification
12
Installation and Operation
13
Pre-Installation Checks
13
Netting Procedures
14
Test Frequency Crystal Information
14
Contents List (Installation Items)
14
Installation Procedure
15
Operation
28
Technical Description
31
Receiver Circuit Summary
31
- Fig. 3.1 Receiver Block Diagram
  31
Transmitter Circuit Summary
32
- Fig. 3.2 Transmitter Block Diagram
  32
Power Distribution and Switching
33
- Fig. 3.3 Power Supply Block Diagram
  33
Control Panel (Front Mount)
34
Control Unit (Remote Mount)
34
RF Front End
36
Oscillator Modules
37
- 12-Channel Oscillator
  37
- Single Channel Oscillator
  38
- 6-Channel Oscillator
  39
PA Module
40
Antenna Filter and Changeover Relay
40
Replacement of Plug-In Modules
49
Use of FM Beaver Test (Extension) Assemblies Kit
49
Fault Finding - Integrated Circuits (IC's) and Thick Film Circuits (Tfs)
49
Antenna Loading
49
Receiver Oscillator Multiplier
49
Transmitter Exciter
49
Construction
51
- Fig. 4.2 Mechanical Construction
  51
Equipment Access
52
Tools Required
52
Procedure
52
Module Replacement
53
- Fig. 4.3 Facility Socket Interconnections
  54
Test Equipment
55
- Fig. 4.4 Diode Probe Circuit Diagram
  55
- Fig. 4.5 Connection of AF Output Meter
  55
Crystal Information
56
Alignment Procedure and Performance Checks
56
Test Points (Tps)
56
Measuring Points (Mps)
56
Identification of Modules and Components
57
Signal Generator Levels
57
Intermediate Frequencies
57
Multiple Channel Equipments
57
Multimeter
57
General Preliminary Checks and Adjustments
57
Receiver Alignment
57
Transmitter Alignment
59
Change of Frequency Procedure
61
Receiver Performance Checks
61
Audio Sensitivity
61
Audio Power Output
61
Bandwidth
61
Squelch
61
Frequency Count
62
Sinad Measurement
62

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