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Manuals
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Motorola Manuals
Radio
M120
Service manual
Motorola M120 Service Manual
146-174 mhz, 403-433 mhz, 438-470 mhz, 465-495 mhz, 490-520 mhz
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Revision Details
Attachments
Parts List
Schematic Diagram for HLD8265A and HLD8266A VHF RF Boards, 136-162 Mhz
Circuit Board Details for HLD8265A and HLD8266A VHF RF Boards, 136-162 Mhz
Circuit Board Details and Schematic for HDL8293A VHF Power Amplifier, 136-162 Mhz, 10-25 Watts
Circuit Board Details and Schematic for HLE8385A UHF Power Amplifier, 403-433 Mhz, 1-10 Watts
Instructions for Expanded Accessory Connector
Extracting a Terminal
Inserting a Pin
Accessory Connector, Rear View
M120 Radio Accessory Connector Table
Table of Contents
How to Use this Manual
Ordering Replacement Parts
M120 VHF Mobile Radio 146 - 174 Mhz 1 - 10 Watts RF Power
M120 VHF Mobile Radio 146 - 174 Mhz 10 - 25 Watts RF Power
M120 VHF Mobile Radio 146 - 174 Mhz 25 - 45 Watts RF Power
M120 VHF Mobile Radio 403 - 433 Mhz 25 - 40 Watts RF Power
M120 UHF Mobile Radio 438 - 470 Mhz 1 - 10 Watts RF Power
M120 UHF Mobile Radio 438 - 470 Mhz 10 - 25 Watts RF Power
M120 UHF Mobile Radio 438 - 470 Mhz 25 - 40 Watts RF Power
M120 UHF Mobile Radio 465 - 495 Mhz 25 - 40 Watts RF Power
M120 UHF Mobile Radio 490 - 520 Mhz 25 - 35 Watts RF Power
Accessories List
Specifications
Disassemble Radio
Remove Control Head and Chassis Covers
Remove RF Chassis Shield
Remove PA Heatsink
Remove RF Circuit Board/Logic Circuit Board/Pa Circuit Board
Assembly Radio
Align Circuits
Program Radio
Recommended Test Equipment
Replace and Calibrate Logic Board
Theory of Operation
RF Board
VHF Receiver Front End, 146-174 Mhz
UHF Receiver Front End/Characteristics of Resonator Filter
Receiver Back End
Receiver IC Block Diagram
Frequency Synthesizer
Synthesizer Section Block Diagram
Charge Pump
Loop Filter
Reference Oscillator
Vcos and Buffers
Logic Board
DC Distribution and Regulation
Microcomputer and Logic
Receiver Audio
Voice Path
Microcomputer Start-Up Routine/Programmable I/O
Transmitter Audio
Transmitter Power Control
Voice/Data Path
Control Line Functions
RF Power Amplifiers
Power Control Operation
1-10 Watt VHF Power Amplifier
10-25 Watt VHF Power Amplifier
25-45 Watt VHF Power Amplifier
1-10 Watt UHF Power Amplifier
10-25 Watt UHF Power Amplifier
25-35/40 Watt UHF Power Amplifier
Front Panel Boards
Display Board
VOL/MIC Board
Front Panel Filter Board
Jumper-Selectable Options
Jumper Positions
Non-Field-Serviceable Components
Operation of the Reference Oscillator
Schematic Diagram for HDL8029A and HDL8031A VHF RF Boards, 146-174 Mhz
Circuit Board Details for HDL8029A and HDL8031A VHF RF Boards, 146-174 Mhz
Schematic Diagram for HLE8229A and HLE8230A UHF RF Boards, 403-433 Mhz
Circuit Board Details for HLE8229A and HLE8230A UHF RF Boards, 403-433 Mhz
Schematic Diagram for HLN8074E Masked Logic Board (2-Layer) (Sheet 1 of 2)
Schematic Diagram for HLN8074E Masked Logic Board (2-Layer) (Sheet 2 of 2)
Service Manual Revision
Schematic Diagram for HLE8300A and HLE8301A UHF RF Boards, 438-470 Mhz
Circuit Board Details for HLE8300A and HLE8301A UHF RF Boards, 438-470 Mhz
Circuit Board Details for HLN8074E Masked Logic Board (2 Layer)
2-Layer Logic Parts List
Switchboard Shown from Component Side
Schematic Diagram for HLE8263A and HLE8264A VHF RF Boards, 465-495 Mhz
Circuit Board Details for HLE8263A and HLE8264A VHF RF Boards, 465-495 Mhz
Schematic Diagram for HLE8227A and HLE8228A UHF RF Boards, 490-520 Mhz
Circuit Board Details for HLE8227A and HLE8228A UHF RF Boards, 490-520 Mhz
Schematic Diagram for HLN8074B Masked Logic Board (2-Layer) (Shit 1 of 2)
Schematic Diagram for HLN8074B Masked Logic Board (2-Layer) (Shit 2 of 2)
Circuit Board Details for HLN8074B Masked Logic Board (2-Layer)
Circuit Board Details and Schematic for HDL8299A VHF Power Amplifier, 146-174 Mhz, 1-10 Watt
Circuit Board Details and Schematic for HDL8033A VHF Power Amplifier, 146-174 Mhz, 10-25 Watt
Circuit Board Details and Schematic for HDL8287A VHF Power Amplifier, 146-174 Mhz, 25-45 Watts
Circuit Board Details and Schematic for HLE8275A UHF Power Amplifier, 404-433 Mhz, 25-40 Watts
Circuit Board Details and Schematic for HLE8267A UHF Power Amplifier, 438-470 Mhz, 1-10 Watts
Circuit Board Details and Schematic for HLE8034A UHF Power Amplifier, 438-470 Mhz, 10-25 Watts
Circuit Board Details and Schematic for HLE8271A UHF Power Amplifier, 438-470 Mhz, 25-40 Watts
Circuit Board Details and Schematic for HLE8284A UHF Power Amplifier, 465-495 Mhz, 25-40 Watts
Circuit Board Details and Schematic for HLE8269A UHF Power Amplifier, 490-520 Mhz, 25-35 Watts
Circuit Board Details, Schematic and Parts List for Front Panel Filter Board (01-80704Y83)
Circuit Board Details, Schematic and Parts List for HLN8439A Display Board, 2 Frequency
Circuit Board Details, Schematic and Parts List for HLN8071A Volume/Microphone Board
Exploded View, Schematic, Circuit Board Detail, and Parts List for Microphone
Exploded Mechanical View and Parts List for M120 Mobile Radios
RF 146-174 Mhz Parts List
RF 403-433 Mhz Parts List
RF 438-470 Mhz Parts List
RF 465-495 Mhz Parts List
RF 490-520 Mhz Parts List
HLN8074B Logic Board 2-Layer Masked Parts List
PA 146-174 Mhz (1-10W) Parts List
PA 146-174 Mhz (10-25W) Parts List
PA 146-174 Mhz (25-45W) Parts List
PA 403-433 Mhz (25/40W) Parts List
PA 438-470 Mhz (1-10W) Parts List
PA 438-470 Mhz (10-25W) Parts List
PA 438-470 Mhz (25/40W) Parts List
PA 465-495 Mhz (25/40W) Parts List
PA 490-520 Mhz (25/35W) Parts List
Service Manual Revision (More)
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1
M120 Vhf Mobile Radio 146 - 174 Mhz 1 - 10 Watts Rf Power
2
M120 Vhf Mobile Radio 146 - 174 Mhz 25 - 45 Watts Rf Power
3
Specifications
4
Program Radio
Download this manual
NOTE: This manual incorporates
MMR-077, MMR-100, AND MMR-104
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Summary of Contents for Motorola M120
Page 1
NOTE: This manual incorporates MMR-077, MMR-100, AND MMR-104...
Page 7
(Page 8 is blank)
Page 86
(Page 28 is blank)
Page 128
END OF DOCUMENT...
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