User Manuals: ICOM IC-775 Amateur HF Transceiver

Manuals and User Guides for ICOM IC-775 Amateur HF Transceiver. We have 7 ICOM IC-775 Amateur HF Transceiver manuals available for free PDF download: Service Manual, Instruction Manual, Maintenance Manual

Icom IC-775 Service Manual (146 pages)

HF All Band Transceiver

Brand: Icom | Category: Transceiver | Size: 60 MB

Introduction
2
Ordering Parts
2
Repair Notes
2
Table of Contents
3
Specifications
4
Disassembly and Option Installations
5
Top and Bottom Covers
5
PA Unit
5
REG Unit
5
Option Installations
6
Front Block
6
UI-100 DSP Unit
6
Optional Filter
7
Filter Selection
7
UT-66 Voice Synthesizer Unit
7
CR--282 High-Stability Crystal Unit
8
AC Voltage Selection
9
Backup Battery Replacement
9
Inside Views
10
Bottom View
10
Top View
11
Circuit Description
12
Receiver Circuits
12
RF Switching Circuit
12
RF Bandpass Filter Circuit
12
1St if Circuit
13
2Nd if Circuit
13
2Nd Mixer Circuit
13
Noise Blanker Circuit
13
4Th Mixer and 4Th if Circuits
14
Twin PBT Circuit
14
IF Notch Circuit
14
AG Circuit
14
SSB/CW Demodulator Circuit
15
AM Demodulator Circuits
15
FM Demodulator Circuit
15
APF and AF Low-Pass Filter Circuits
15
AF Amplifier Circuit
16
Transmitter Circuits
16
Microphone Amplifier Circuit
16
VOX Circuit
16
FM and am Modulation Circuits
17
RF Speed Compressor Circuit
17
IF Amplifier
17
RF Circuit
17
APC Circuit
18
Temperature Protection Circuit
18
Monitor Circuit
18
RF, SWR, ALC, COMP, Meter Circuits
18
PLL Circuits
19
1St lo PLL Circuits
19
Frequency Construction
19
Reference Loop PLL
19
2Nd lo and Reference Oscillator Circuits
20
3Rd/4Th lo and Receiver/Transmit/Monitor BFO Circuits
20
Antenna Tuner Circuits
20
Matching Circuit
20
Detector Circuit
21
Motor Control Circuit
21
Antenna Tuner CPU Port Allocation
21
SWR Detector
21
Logic Circuits
22
Band Selection Data
22
Main CPU Port Allocations
22
SUB CPU Port Allocations
23
I/O Expander Port Allocations
23
Output Ports
23
DSP Circuits
24
DSP Receiving
24
DSP Transmitting
24
Adjustment Procedures
25
Preparation before Servicing
25
Required Test Equipment
25
Connection
25
PLL Adjustment
26
PLL Unit
27
Receiver Adjustment
28
IF and RF Units
29
Transmitter Adjustment
32
Tuner Unit Adjustment
38
CTRL Unit
38
Parts List
39
Mechanical Parts
74
Semi-Conductor Information
85
Transistor and Fet's
85
Diodes
86
Board Layouts
87
DSP Unit
87
SW-A Unit
89
MIC Unit
90
SW-B Unit
93
Display Unit
93
VR-A Unit
95
Main Unit
97
IF Unit
104
Voltage Diagram/Block Diagram
119

Icom IC-775 Service Manual (146 pages)

all band

Brand: Icom | Category: Transceiver | Size: 10 MB

Table of Contents
3
Specifications
4
Disassembly Instructions
5
Option Installations
6
Section 3 Inside Views
10
Section Inside Views
10
Section 4 Circuit Description
12
- Transmitter Circuits
  16
- Antenna Tuner Circuits
  20
- Logic Circuits
  22
- Dsp Circuits
  24
- Preparation before Servicing
  25
- Pll Adjustment
  26
- Receiver Adjustment
  28
- Transmitter Adjustment
  32
- Tuner Unit Adjustment
  38
Section 6 Parts List
39
Section 8 Semi-Conductor Information
85
SECTION 9 BOARD LAYOUTS 9 - 1 to
87
- Dsp Unit
  87
- Sw-Aunit
  89
- Sw-Band Display Units
  93
- Vr-Aunit
  95
- Main Unit
  97
- Rfunit
  101
- If Unit
  104
- Pll Unit
  108
- Pa Unit
  112
- Filter Unit
  114
- Ctrl Unit
  116
- Relay Unit
  118

Icom IC-775 Instruction Manual (70 pages)

Brand: Icom | Category: Transceiver | Size: 9 MB

Explicit Definitions
2
Table of Contents
3
Panel Description
4
Setting Procedure
7
Technical Information
16
Installation and Connections
20
Command Table
23
Basic Operation
24
E When First Applying Power (CPU Resetting)
24
W Basic SSB/AM Operation en
26
O] Basic FM Operation
26
E Basic CW Operation
28
E Frequency Setting with the Main Dial
28
E Direct Frequency Entry with the Keypad
28
Quick Tuning Step
29
Auto Tuning Step Function
29
E Advanced Tuning Functions en
31
FUNCTION OPERATIONS en
32
E Memo Pad Operation
32
W if Notch Operation E
33
Practical Example
37
Operation
39
Tuner Operation
44
Manual Tuning
44
Set Mode
49
Voice Synthesizer
49
E Programmed Scan Operation
58
E Select Memory Scan Operation
58
Maintenance and Adjustment
60
E Frequency Calibration (Approximate)
60
WE Main Dial Brake Adjustment
60
E AC Fuse Replacement Ee
61
Installation SE
61
E Lithium Backup Battery
61

ICOM IC-775 Instruction Manual (70 pages)

HF Transceiver

Brand: ICOM | Category: Transceiver | Size: 9 MB

ICOM IC-775 Instruction Manual (67 pages)

ICOM IC-775: User Guide

Brand: ICOM | Category: Transceiver | Size: 15 MB

ICOM IC-775 Maintenance Manual (7 pages)

ICOM IC-775DSP: User Guide

Brand: ICOM | Category: Two-Way Radio | Size: 1 MB

Icom IC-775 Maintenance Manual (6 pages)

Brand: Icom | Category: Transceiver | Size: 1 MB

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