Motorola M120 Manuals

Manuals and User Guides for Motorola M120. We have 1 Motorola M120 manual available for free PDF download: Service Manual

Motorola M120 Service Manual (129 pages)

146-174 MHz, 403-433 MHz, 438-470 MHz, 465-495 MHz, 490-520 MHz

Brand: Motorola | Category: Radio | Size: 7.03 MB

Revision Details
2
Attachments
2
Parts List
5
Schematic Diagram for HLD8265A and HLD8266A VHF RF Boards, 136-162 Mhz
12
Circuit Board Details for HLD8265A and HLD8266A VHF RF Boards, 136-162 Mhz
13
Circuit Board Details and Schematic for HDL8293A VHF Power Amplifier, 136-162 Mhz, 10-25 Watts
14
Circuit Board Details and Schematic for HLE8385A UHF Power Amplifier, 403-433 Mhz, 1-10 Watts
15
Instructions for Expanded Accessory Connector
16
Extracting a Terminal
16
Inserting a Pin
16
Accessory Connector, Rear View
16
M120 Radio Accessory Connector Table
17
Table of Contents
18
How to Use this Manual
20
Ordering Replacement Parts
20
M120 VHF Mobile Radio 146 - 174 Mhz 1 - 10 Watts RF Power
21
M120 VHF Mobile Radio 146 - 174 Mhz 10 - 25 Watts RF Power
22
M120 VHF Mobile Radio 146 - 174 Mhz 25 - 45 Watts RF Power
23
M120 VHF Mobile Radio 403 - 433 Mhz 25 - 40 Watts RF Power
24
M120 UHF Mobile Radio 438 - 470 Mhz 1 - 10 Watts RF Power
25
M120 UHF Mobile Radio 438 - 470 Mhz 10 - 25 Watts RF Power
26
M120 UHF Mobile Radio 438 - 470 Mhz 25 - 40 Watts RF Power
27
M120 UHF Mobile Radio 465 - 495 Mhz 25 - 40 Watts RF Power
28
M120 UHF Mobile Radio 490 - 520 Mhz 25 - 35 Watts RF Power
29
Accessories List
30
Specifications
32
Disassemble Radio
33
Remove Control Head and Chassis Covers
33
Remove RF Chassis Shield
33
Remove PA Heatsink
33
Remove RF Circuit Board/Logic Circuit Board/Pa Circuit Board
34
Assembly Radio
34
Align Circuits
36
Program Radio
36
Recommended Test Equipment
36
Replace and Calibrate Logic Board
36
Theory of Operation
37
RF Board
37
VHF Receiver Front End, 146-174 Mhz
37
UHF Receiver Front End/Characteristics of Resonator Filter
37
Receiver Back End
38
Receiver IC Block Diagram
38
Frequency Synthesizer
39
Synthesizer Section Block Diagram
40
Charge Pump
41
Loop Filter
41
Reference Oscillator
41
Vcos and Buffers
41
Logic Board
42
DC Distribution and Regulation
42
Microcomputer and Logic
43
Receiver Audio
43
Voice Path
43
Microcomputer Start-Up Routine/Programmable I/O
43
Transmitter Audio
44
Transmitter Power Control
44
Voice/Data Path
44
Control Line Functions
44
RF Power Amplifiers
45
Power Control Operation
45
1-10 Watt VHF Power Amplifier
45
10-25 Watt VHF Power Amplifier
46
25-45 Watt VHF Power Amplifier
46
1-10 Watt UHF Power Amplifier
46
10-25 Watt UHF Power Amplifier
47
25-35/40 Watt UHF Power Amplifier
47
Front Panel Boards
48
Display Board
48
VOL/MIC Board
48
Front Panel Filter Board
48
Jumper-Selectable Options
49
Jumper Positions
49
Non-Field-Serviceable Components
50
Operation of the Reference Oscillator
50
Schematic Diagram for HDL8029A and HDL8031A VHF RF Boards, 146-174 Mhz
52
Circuit Board Details for HDL8029A and HDL8031A VHF RF Boards, 146-174 Mhz
53
Schematic Diagram for HLE8229A and HLE8230A UHF RF Boards, 403-433 Mhz
54
Circuit Board Details for HLE8229A and HLE8230A UHF RF Boards, 403-433 Mhz
55
Schematic Diagram for HLN8074E Masked Logic Board (2-Layer) (Sheet 1 of 2)
56
Schematic Diagram for HLN8074E Masked Logic Board (2-Layer) (Sheet 2 of 2)
57
Service Manual Revision
58
Schematic Diagram for HLE8300A and HLE8301A UHF RF Boards, 438-470 Mhz
59
Circuit Board Details for HLE8300A and HLE8301A UHF RF Boards, 438-470 Mhz
60
Circuit Board Details for HLN8074E Masked Logic Board (2 Layer)
61
2-Layer Logic Parts List
62
Switchboard Shown from Component Side
65
Schematic Diagram for HLE8263A and HLE8264A VHF RF Boards, 465-495 Mhz
66
Circuit Board Details for HLE8263A and HLE8264A VHF RF Boards, 465-495 Mhz
67
Schematic Diagram for HLE8227A and HLE8228A UHF RF Boards, 490-520 Mhz
68
Circuit Board Details for HLE8227A and HLE8228A UHF RF Boards, 490-520 Mhz
69
Schematic Diagram for HLN8074B Masked Logic Board (2-Layer) (Shit 1 of 2)
70
Schematic Diagram for HLN8074B Masked Logic Board (2-Layer) (Shit 2 of 2)
71
Circuit Board Details for HLN8074B Masked Logic Board (2-Layer)
72
Circuit Board Details and Schematic for HDL8299A VHF Power Amplifier, 146-174 Mhz, 1-10 Watt
73
Circuit Board Details and Schematic for HDL8033A VHF Power Amplifier, 146-174 Mhz, 10-25 Watt
74
Circuit Board Details and Schematic for HDL8287A VHF Power Amplifier, 146-174 Mhz, 25-45 Watts
75
Circuit Board Details and Schematic for HLE8275A UHF Power Amplifier, 404-433 Mhz, 25-40 Watts
76
Circuit Board Details and Schematic for HLE8267A UHF Power Amplifier, 438-470 Mhz, 1-10 Watts
77
Circuit Board Details and Schematic for HLE8034A UHF Power Amplifier, 438-470 Mhz, 10-25 Watts
78
Circuit Board Details and Schematic for HLE8271A UHF Power Amplifier, 438-470 Mhz, 25-40 Watts
79
Circuit Board Details and Schematic for HLE8284A UHF Power Amplifier, 465-495 Mhz, 25-40 Watts
80
Circuit Board Details and Schematic for HLE8269A UHF Power Amplifier, 490-520 Mhz, 25-35 Watts
81
Circuit Board Details, Schematic and Parts List for Front Panel Filter Board (01-80704Y83)
82
Circuit Board Details, Schematic and Parts List for HLN8439A Display Board, 2 Frequency
83
Circuit Board Details, Schematic and Parts List for HLN8071A Volume/Microphone Board
84
Exploded View, Schematic, Circuit Board Detail, and Parts List for Microphone
85
Exploded Mechanical View and Parts List for M120 Mobile Radios
86
RF 146-174 Mhz Parts List
87
RF 403-433 Mhz Parts List
90
RF 438-470 Mhz Parts List
94
RF 465-495 Mhz Parts List
98
RF 490-520 Mhz Parts List
102
HLN8074B Logic Board 2-Layer Masked Parts List
106
PA 146-174 Mhz (1-10W) Parts List
109
PA 146-174 Mhz (10-25W) Parts List
111
PA 146-174 Mhz (25-45W) Parts List
113
PA 403-433 Mhz (25/40W) Parts List
115
PA 438-470 Mhz (1-10W) Parts List
117
PA 438-470 Mhz (10-25W) Parts List
119
PA 438-470 Mhz (25/40W) Parts List
121
PA 465-495 Mhz (25/40W) Parts List
124
PA 490-520 Mhz (25/35W) Parts List
126
Service Manual Revision (More)
128

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