Sign In
Upload
Download
Table of Contents
Contents
Add to my manuals
Delete from my manuals
Share
URL of this page:
HTML Link:
Bookmark this page
Add
Manual will be automatically added to "My Manuals"
×
Bookmark added
×
Added to my manuals
Manuals
Brands
Icom Manuals
Transceiver
IC-751A
Service manual
Table Of Contents - Icom IC-751A Service Manual
Hide thumbs
Also See for IC-751A
:
Instruction manual
(64 pages)
,
Instruction manual
(64 pages)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
Table Of Contents
151
page
of
151
Go
/
151
Contents
Table of Contents
Bookmarks
Table of Contents
Advertisement
Table of Contents
Table Of Contents
3
General Specifications
5
Transmitter Specifications
5
Receiver Specifications
6
Outside And Inside Views
7
Front Panel
7
Display
9
Top Panel
9
Rear Panel
10
Main Unit View
11
Logic And Pll Units View
13
Rf Unit View
15
Pa Unit View
15
Block Diagram
17
Circuit Description
18
Receiver Circuits
18
Rf Circuits (Rf And Connector Units)
18
If Circuits/Rf Unit
18
Main Unit
19
Filter Section (Main Unit)
19
Noise Blanker Circuit
19
Two Signal Receive Characteristics Diagram
19
Notch/Detector/Agc Circuit
20
Fm If Amplifier And Detector Circuits
20
Af Amplifier Circuits
20
Agc Circuit Schematic Diagram
20
Transmitter Circuits
21
Mic Amplifier Circuit/Balanced Modulator Circuit/Ssb And Am Transmitter If Circuits/Compressor Circuit
21
S-Meter Circuit
21
Squelch Circuit
21
Cw, Rtty Oscillation Circuits
22
Cw Keying Circuit
22
Fm Oscillator And Modulator Circuits/Bfo Circuits
22
Transmitter If Amplifier Circuits
22
Rf Unit Block Diagram
23
Pbt Oscillator Circuit
23
Sw Sidetone Circuit
23
Pa Unit/Filter, Connector Units
23
Monitor Circuit/Monitor Preamplifier Circuit
24
Alc/Apc Circuit
24
Transmitter Meter Circuits
24
Vox And Anti-Vox Circuits
24
Power Supply Circuits/Pll Circuits
25
Meter/Filter Switching Circuit
25
8V Regulator Circuit/Receive/Transmit 8V (R8V) Regulator Circuit
25
Power Supply Switching Circuit/Regulator Switching Timing Circuit
25
Reference Frequency Oscillator And Marker Circuits
26
Pll Sub-Loop Block Diagram
26
Main Loop Circuits
27
Pll Ic
27
Marker Generator Chart
27
Vco
28
Loop System
28
Loop Filter And Mute Circuits
28
In-Loop Local Oscillator Circuit/Sub-Loop
28
Logic Unit
29
Cpu/Cpu Input Control Circuit
29
Pll Data
29
How To Derive N-Data
29
Custom Ic Pin Connection Chart
30
Cpu Pin Connection Chart
30
Cpu Memory Map
30
I/O Expander Circuit
31
N-Data Of Pll
31
N-Data Output Timing Diagram
31
Matrix Unit
32
Y0→Db0-Db3 (Ten Key)
32
Y0→Db4 (Scan Start/Stop)
32
Y1→Db4 (Vfo A/B)
32
Y1→Db5 (Memory Read)/Y1→Db6 (Ham/General)
33
Y1→Db7 (Rit On/Off)/Y2→Db0 (Function)
33
Y2→Db3 (Rit/∆Tx Clear)
33
Y2→Db4 (Vfo A=B)
33
Matrix Unit (Cont.)
34
Frequency Differences In Various Modes Chart
34
Display Unit
35
Matrix Unit (End)
35
Display Section
36
Display Data Timing Chart
36
Dc/Dc Converter Section
36
Other Circuits/Enc 1 And Enc 2 Units
36
Relay Unit
37
Keyer Unit
37
Dot, Dash Inputs And Electronic Keyer Output
37
Spd/Weight/Fan Motor Control
37
Disassembly And Assembly Diagrams
38
Frame Disassembly
38
Front Panel Disassembly
40
Front Panel (2) Disassembly
42
Front Panel (3) Disassembly
44
Rear Panel Disassembly
46
Front Unit Connector Assembly
48
Main Unit Connector Assembly Diagram
50
Logic And Pll Unit Connector Assembly Diagram
51
Rf Unit Connector Assembly Diagram
52
Filter Unit Connector Assembly Diagram
52
Rear Panel Connector Assembly Diagram
53
Maintenance And Adjustment
54
Preparation Before Servicing
54
Pll Adjustment
55
Pll Unit View
56
Frequency Adjustment
57
Main Unit Illustration
58
Receiver Adjustment
59
Main Unit Illustraton (2)
60
Receiver Adjustment (Cont.)
61
Main Unit Illustration (3)
62
Transmitter Adjustment
63
Pa Unit
64
Transmitter Adjustment (Cont.)
65
Main Unit Illustration (4)
66
Transmitter Adjustment (Cont)
67
Main Unit Illustration (5)
68
Transmitter Adjustment (Continued)
69
Main Unit Illustration (6)
70
Board Layouts
71
Front Af Unit Board Layout
71
Front Marker Unit Board Layout
71
Front Mode Switch Unit Board Layout
71
Matrix Unit Board Layout
72
Matrix Switch Unit Board Layout
72
Display Unit/Keyer Unit Board Layouts
73
Logic Unit Board Layout
74
Main Unit Board Layout
75
Pll Unit Board Layout
76
Rf Unit Board Layout
77
Pa Unit Board Layout
78
Pa Connector Unit/Pa Choke Unit Board Layout
79
Filter Unit Board Layout
80
Voltage/Circuit Diagrams
81
Main Unit Circuit Diagram
81
Pll Unit Circuit Diagram
83
Logic Unit Circuit Diagram
85
Fr Unit Circuit Diagram
87
Matrix Unit Circuit Diagram
89
Display Unit Circuit Diagram
91
Pa Unit Circuit Diagram
93
Filter Unit Circuit Diagram
95
Keye Unit/Front Encoder Units Circuit Diagrams
96
Front Unit Wiring Diagram
97
Ic Specifications
99
Linear Ics Specifications
99
Logic Ics Specifications
100
Parts List
105
Ef Unit/Front Unit Parts List
105
Display Unit Parts List
106
Logic Unit Parts List
108
Matrix Unit Parts List
111
Pll Unit Parts List
113
Main Unit Parts List
116
Rf Unit Parts List
127
Filter Unit Parts List
131
Pa Unit Parts List
133
Keyer Unit Parts List
135
Mute Unit Parts List
135
Options Installation
136
Optional Filters
136
Filter Reverse Switches
136
Fl-52A, Fl-53A, Fl-63A, Fl-70 Filters Installation
136
Optional Ic-Ps35 Internal Power Supply
137
Fl-33 Installation
137
Optional Ic-Ex310 Voice Synthesizer Unit
138
Optional Cr-64 High-Stability Crystal Unit
138
Optional Ut-30 Programmable Encoder Unit
139
Filter Characteristics Chart
139
Filter Combinations Chart
140
Filter System
140
Filters Diagram
140
Ic-751A Schematic Diagram
141
Previous
Page
1
...
150
151
Show Quick Links
Quick Links:
IC-751A Schematic Diagram
Hide quick links:
Permanently
Temporary
Cancel
Advertisement
Table of Contents
Related Manuals for Icom IC-751A
Receiver Icom ic-751a Instruction Manual
Hf all band transceiver general coverage receiver (64 pages)
Transceiver Icom IC-751A Instruction Manual
Hf all band transceiver general coverage receiver (64 pages)
Transceiver ICOM IC-751 Instruction Manual
Hf all band transceiver, general coverage receiver (37 pages)
Transceiver Icom IC-751 Service Manual
(164 pages)
Transceiver Icom IC-756 Instruction Manual
Hf/50 mhz all mode transceiver (72 pages)
Transceiver Icom IC-756 Service Manual
(132 pages)
Transceiver ICOM IC-756PRO Instruction Manual
Hf/50 mhz all mode transceiver (84 pages)
Transceiver Icom IC-756PRO Service Manual
Hf/50mhz all band transceiver (93 pages)
Transceiver Icom IC-756PRO III Service Manual
Hf/50mhz all mode transceiver (104 pages)
Transceiver Icom IC-756PRO Alignment Procedure
(13 pages)
Transceiver Icom IC-756PROIII Service Manual
Hf/50mhz all band transceiver (119 pages)
Transceiver Icom IC-756PROII Instruction Manual
Hf/50 mhz all mode transceiver (88 pages)
Transceiver Icom IC-756PROII Service Manual
Hf/50mhz all mode transceiver (105 pages)
Transceiver ICOM IC-756PROIII Instruction Manual
Hf/50 mhz all mode transceiver (124 pages)
Transceiver Icom IC-756PROIII Service Manual
Hf/50mhz all mode transceiver (6 pages)
Transceiver Icom IC-756proIII Service Manual
(106 pages)
Related Content for Icom IC-751A
IC-M91D Table Of Contents
Icom IC-M91D
IC-756PRO2 Table Of Contents
Icom IC-756PRO2
IC-M91D Table Of Contents
Icom IC-M91D
IC-F29SDR Table Of Contents
Icom IC-F29SDR
ID-51A Table Of Contents
Icom ID-51A
ID-31E PLUS Table Of Contents By Topic
Icom ID-31E PLUS
iM323 Table Of Contents
Icom iM323
ID-4100A Table Of Contents By Topic
Icom ID-4100A
IC-7000 Table Of Contents
Icom IC-7000
ic-718 Table Of Contents
Icom ic-718
IC-910H Table Of Contents
Icom IC-910H
ID-5100E Table Of Contents
Icom ID-5100E
IC-7600 Table Of Contents
Icom IC-7600
IC-7600 Table Of Contents
Icom IC-7600
ic-450 Table Of Contents
Icom ic-450
ic-m423 Table Of Contents (Continued)
Icom ic-m423
Table of Contents
Print
Rename the bookmark
Delete bookmark?
Delete from my manuals?
Login
Sign In
OR
Sign in with Facebook
Sign in with Google
Upload manual
Upload from disk
Upload from URL