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IC-735
Service manual
Icom IC-735 Service Manual
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Also See for IC-735
:
Service manual
(149 pages)
,
Instruction manual
(51 pages)
,
Common questions
(4 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Specifications
Installation and Connections
Antenna
Microphone
CW Key
Power Supply
For AC Operation with the PS-55
For AC Operation with Other Manufacturers AC Power Supply
Ground
System Interconnections
Linear Amplifier
Using the IC-2KL Linear Amplifier
Antenna Tuner
Using the AT-150
Using the IC-AT100/500
RTTY Terminal Unit
Using MIC/Phone Jacks
Using ACC (1) Connector
RTTY Operation
Frequency Readout
Receive Antenna
Rear Panel Connections
Accessory Socket Connections
Acc (1, 2)
Band Control Voltage Chart
Option Installations
IC-EX243 Electronic Keyer Unit
Installing Optional Electronic Keyer Unit
Fl-32, FL-63 CW Narrow Filters
UT-30 Tone Encoder Unit
Subaudible Tone Encoder Programming Chart
Assembly Procedure
Circuit Description
Main Unit
Attenuator (ATT), Reception Band-Pass Filter (BPF), and Band-Signal DC Amplifier
NB Circuit
9 Mhz Band if Amplifier and Notch Filter
455 Khz if Amplifier
Configuration of the PBT
PBT Operation of this Unit
SSB and CW Detection Circuit
FM, am Detection Circuit
AGC Circuit
All-Mode Squelch Circuit
AF Amplifier
CW Key Circuit Side Tone
Vox Break-In Circuit
RF and SWR Circuit
Power Supply Circuit
Timing Diagram of CW Operation
PLL Unit
PLL Section
Frequencies of the PLL Section am Mode
PLL Block Diagram
Reference Oscillation Circuit
Main Loop
Ics for the PLL
Vco
LO in the Loop
PLL Reference Frequency and Marker Circuit
Sub Loop (LPL)
2Nd lo Output
Determining the N-Data
MIC Amplifier Circuit
Logic Section
CPU Port Allocations
Reset Circuit
CPU Reset Circuit
Sensor and MIC Up/Down Circuit
Sensor Circuit
MIC Up/Down Circuit
4 Times Speed
Truth Tables
PLL and Display Data
Frequency Ranges
BPF, LPF, VCO, and LDA Classifications
Shift in PLL Data According to Mode
Displayed Frequency: Constant
LCD Display
Front Unit
Rit Circuit
Send Circuit
Dimmer Circuit
PA Unit
Protection Circuit
Filter Unit
Die-Cast Heat Sink
Theory of Matrix Function
Front Panel Operation (Matrix Input)
Xmit
Description of Additional Matrix Input
Voltage/Circuit Diagrams
Front Unit and Wiring Diagram
Main Unit Diagram
PL Unit
PA Unit (Power Amplifier)
PA Unit (Filter)
Front Unit Dimmer Circuit
Sensor Unit
Maintenance and Adjustment
Preparation before Servicing
General Adjustment
PLL Adjustment
Transmitter Adjustment
Rear Panel
Receiver Adjustment
Adjustment Locations
Main Unit Side
Bottom View
Side View
PL Unit Side
Top View
Lithium Battery Replacement
Fuse Replacement
How to Remove PA Cover
Troubleshooting
Inside Views
PA Unit (Power Amplifier and Filter)
Disassembly and Assembly Diagrams
Front Panel Disassembly
Top Cover, Bottom Cover, PA Disassembly
Front Sub-Chassis Connector Assembly
Main Unit Connector Assembly
PL Unit Connector Assembly
PA Unit Connector Assembly
Board Layouts
Block Diagram
IC Ratings
Pd4066Bc
Maximum Ratings
Pin Connection
PD7225G (LCD Controller/Driver)
Nd487C1-3R
Ba618
PC577H (FM-IF Amplifier)
PC1037 (Double Balanced Modulator)
NJM4558D (Dual Low Noise Amp)
Njm072082D
HD10551 (Pre-Scaler for Digital Tuning System)
PC1181H (Audio Power Amplifier)
M5218L (Dual Audio Amplifier)
A78M08
BA222 (Monolithic Timer)
Pd4001Bc
Logic Diagram
Pd4069Ubc
Equivalent Circuit Diagram
Hd63A01V1
Pd4510Bc
Pd4021Bc
Pd82C43C
DAN401 (High-Speed Switching Diode Array)
PD2834C (PLL Frequency Synthesizer)
Pb555C
SN76514 (Circuit Type Balanced Mixer)
A78M05C
PC1037H (Double Balanced Modulator)
SN4LS90N (Decode Counter)
Optional Units
Other Options Available
Parts List
ICOM CI-V Communication Interface System
Features
Theory of Operation
CPU I/O Port and Input Matrix
Terminal Descriptions
Serial Data
Typical Command Message
Csma/CD
Control Code
Collision Detection
Operation with the IC-735
Control Code Operation
IC-735 Baud Rates
Control Code [00] (Set Frequency-Transceive)
Control Code [01] (Set Mode-Transceive)
Control Code [02] (Tuning Range Request)
Control Code [03] (Frequency Request)
Control Code [04] (Mode Request)
Control Code [05] (Set Frequency)
Control Code [06] (Set Mode)
Control Code [07]
Control Code [08] (Set Memory Channel)
Control Code [09] (Memory Write)
Control Code [0A]
IC-735 Schematic Diagram
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IC-735 Schematic Diagram
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Instruction Manual
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