Kenwood TM-742 A VHF/UHF Transceiver Manuals

Manuals and User Guides for Kenwood TM-742 A VHF/UHF Transceiver. We have 1 Kenwood TM-742 A VHF/UHF Transceiver manual available for free PDF download: Service Manual

Kenwood TM-742 A Service Manual

Kenwood TM-742 A Service Manual (167 pages)

144/430 Mhz, FM Multi Bander; 144/430/1200 MHz FM Tribander

Brand: Kenwood | Category: Receiver | Size: 15 MB

Table of Contents

Contents
1
Overview
2
Band Units
2
Circuit Description
11
28 TX-RX Unit Frequency Configuration
11
28 TX-RX Unit Receive Signal Channel
11
Signal-Strength Meter
11
Shift-Register Circuit
12
28 TX-RX Unit Transmit Signal Channel
12
Modulator Circuit
12
Younger-Stage Circuit/Power Amplifier Circuit
12
APC Circuit
13
8T (8 V During Transmission) and Unlock Signal
13
28 TX-RX Unit PLL Synthesizer
13
PLL Circuit Pin Functions
13
50 TX-RX Unit Frequency Configuration
14
50 TX-RX Unit Receive Signal Channel
14
50 TX-RX Unit Transmit Signal Channel
15
Power Amplifier Circuit
15
LPF Circuit
16
50 TX-RX Unit PLL Synthesizer
17
144 TX-RX Unit Frequency Configuration
18
144 TX-RX Unit Receive Signal Channel
18
144 TX-RX Unit PLL Synthesizer
19
220 TX-RX Unit Frequency Configuration
20
220 TX-RX Unit Receive Signal Channel
21
220 TX-RX Unit Transmit Signal Channel
22
220 TX-RX Unit PLL Synthesizer
22
430 TX-RX Unit Frequency Configuration
23
430 TX-RX Unit Receive Signal Channel
23
430 TX-RX Unit Transmit Signal Channel
24
430 TX-RX Unit PLL Synthesizer
24
1200 TX-RX Unit Frequency Configuration
25
1200 TX-RX Unit Receive Signal Channel
25
1200 TX-RX Unit Transmit Signal Channel
26
1200 TX-RX Unit PLL Synthesizer
27
Unlock Circuit
28
ALT (Automatic Frequency Locked Turning) Circuit
28
Predrive Circuit HIC
28
Drive Circuit HIC
28
Digital Control Unit
29
Clock IC Initialiation
29
Data Control
30
Data Read
30
Data Write
30
Mode Setting Register
30
Panel Unit
31
Key Rotary Encoder Input Circuit
31
Display Circuit
31
Dimmer Circuit
31
Control Unit
32
Reset Backup Circuit
32
Microphone/Key Input Circuit
32
Shift Register
32
Shift Register Port Specification List
33
I/O Port Specification List
35
Terminal List of Clock IC
42
List of Terminals of the Parallel - Serial Converter IC
43
LCD Driver List
49
Tone Output
52
Input/Output of CTCSS
52
Input/Output of DTMF
52
AF Signal System
55
Speaker Switching Circuit
56
Squelch Circuit
56
Connector Connecting the Band Unit and Control Unit
57
Description of Components
58
Semiconductor Data
75
Parts List
78
Exploded Views
123
Adjustment
129
Common Section Adjustment
130
Receiver Section Adjustment
130
Transmitter Section Adjustment
131
PC Board View
140
Schematic Diagram
142
Block Diagram
157
Level Diagram
159
Multi Function Microphone
164
Multi Function Microphone with Autopatch
165
Specification
166

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