Kenwood TH-78A Manuals

Manuals and User Guides for Kenwood TH-78A. We have 5 Kenwood TH-78A manuals available for free PDF download: Service Manual, Instruction Manual, Instructions

Kenwood TH-78A Service Manual (114 pages)

144/430 (440) MHz FM Dual Bander

Brand: Kenwood | Category: Two-Way Radio | Size: 10.85 MB

Contents
1
Circuit Description
2
Frequency Configuration
2
Receiver System
3
VHF Receiver
3
RX Selection Block Diagram
3
Sub VHF Receiver
4
UHF Receiver
4
Sub UHF Receiver
4
Audio Circuits
4
Receiver Audio Signals Switching
5
RX Audio Switching Circuit
5
External Speaker Detection
6
Audio Amplifier
6
Squelch Circuit
6
S Meter Circuit
6
Transmitter System
7
Modulator Circuit
7
88.5 Hz LPF
7
Driver and Final Amplifier
7
APC Circuit
8
Power Supply Circuit
9
Save Circuit
9
PLL Circuit
10
Pll
10
Vco-V
10
Vco-U
10
Unlock Detection Circuit
11
LED Drive Circuit
11
Remote Control Microphone Circuit
11
Microcomputers and Peripheral Circuits
12
Reset and Backup Circuits
12
DTMF and Dtss/Paging
13
DTMF Encode
13
DTMF Decode
13
DTMF Decode Timing
13
CTCSS Operation
14
Speaker, Microphone, Remote Circuit
14
Description of Components
15
Control Unit
15
TX-RX Unit
16
Semiconductor Data
21
Block Diagram
21
Pin Functions
23
Pin Layout
23
UHF Power Module
24
Maximum Rating
24
Electrical Characteristics
24
Microcomputer
25
Pin Connection
25
I/O Port Specifiations
26
Parts List
33
Disassembly
54
Adjustment
57
Required Test Equipment
57
Preparation
57
TH-78 Adjustment
58
Adjustment Point
62
Wiring Diagram
64
Unit Boards
65
Level Diagram
99
Terminal Functions
101
Battery Case
103
Head Set with Vox & PTT
104
Extension Memory Unit
106
DC Cord
107
Plug with Cord
107
SC-35 External View
108
SC-36 External View
108
MB-6 External View
108
WR-2 External View
108
SMC-31 External View
109
SMC-32 External View
109
SMC-31 Specifications
109
SMC-32 Specficiations
109
SMC-33 Specifications
110
HS-9 External View
110
TSU-7 PC Board View
111
TSU-7 Parts List
111
PC Board Views
112
Circuit Diagram
112
Specifications
113

Kenwood TH-78A Instruction Manual (69 pages)

144/430, 144/440 FM Dual Banders

Brand: Kenwood | Category: Two-Way Radio | Size: 0.76 MB

Instruction Manual
1
Table of Contents
2
Accessories

4
Before Operation

4
- Controls Overview
  5
- Nicd Battery Pack (PB-13)
  7
The Battery Pack

7
- Recharging
  
  7
- Installing the Battery Pack
  7
- Battery Voltage Level
  8
- Battery Operating Time
  8
Receiver Operation

9
- Getting Started
  9
- Tuning Control and Volume Control
  9
- Selecting Frequency
  11
- Step Size Selection
  13
- Programmable VFO Tuning Limits
  14
- Basic Receiving Functions
  15
Transmitter Operation

16
- To Transmit
  16
- Changing Transmitter Output Power
  16
- TX. Stop Function
  17
- Time out Timer
  17
Using the Memory

18
- Microprocessor Memory Backup
  18
- Initializing the Memory
  18
- Memory Channel
  18
- Memory Contents
  19
- Entering Memory Data
  19
- Entering Split Channel Frequencies
  20
  - Entering the Call Channel Frequency
    20
  - Recalling Memory Channels
    21
  - Memory Shift
    21
- Memory Channel Character Display
  22
Scanning

23
- Hold/Resume Programming
  23
- Scan Operation Cancel
  23
- Scan Options
  24
- Scanning Memory Channels
  24
- Scanning Band
  25
- Programmable Band Scan
  25
- Mhz Scan
  26
- Vfo/Memory Scan
  26
- CALL/VFO Scan
  27
- Call/Memory Scan
  27
- M/C(Vfo/Memory/Call) Scan
  27
  - The Alert Function
    27
Repeater Operation

28
- Transmitter Offsets
  28
- Selecting the Offset Direction
  28
- Automatic Offset Selection
  28
- Manual Offset Selection
  29
- The Reverse Function
  29
- Tone Operation
  30
- Autopatch Operations
  31
- DTMF Memory
  32
Operation as a Repeater

33
Ctcss Operation

34
The Dual Tone Squelch System (Dtss)

35
- DTSS Code
  35
- DTS Code
  35
- Using the DTSS Function
  35
Paging

36
- Paging Operation Overview
  36
- Paging Code Memory
  37
- Setting Paging Codes
  37
- Sending Pages (Calling)
  38
- Receiving Pages Wait)
  40
- Canceling Signal Squelch
  41
- Locking out Codes
  41
- Answer-Back
  41
Message Transmission and Reception

42
- Message Transmission Modes
  42
- Using the Message Memory
  42
- Message Memory Check
  44
- Message Memory Transmission
  44
- Message Reception
  44
- Receive Message Memory
  45
Enhanced Receiver Functions

46
- The Tone Alert System
  46
- Monitor
  47
- Beepoff
  47
- Lamp
  47
- Key Lock
  47
- Volume Adjustment When You Use Anearphone
  48
- Switching Speaker Output When a Speaker-Microphone Is Connected
  48
- Automatic Band Change Function
  49
  - Simultaneous Receive Function of Two Signal in the same Band
    49
- Single Band Operation
  50
- 11 Mhz Mode
  50
- Channelized Frequency Display
  50
Power Saver Features

51
- The Battery Saver Mode
  51
- Automatic Power off (APO)
  51
Clock Function

52
- Time Setting
  52
- Timer Function
  52
Duplex Operation

54
Power on Message and Function Message

55
- Power on Message
  55
- Function Message
  55
Maintenance

57
- General Information
  57
- Service
  57
- Record Keeping
  57
Troubleshooting

58
Accessories

59
Quick Reference

67

Kenwood TH-78A Instruction Manual (52 pages)

144/440MHz FM Handheld Dual Bander

Brand: Kenwood | Category: Transceiver | Size: 0.29 MB

Table of Contents
2
Controls Overview

5
The Battery Pack

6
Receiver Operation

7
- Getting Started
  7
- Tuning Control and Volume Control
  8
- Selecting Frequency
  10
- Step Size Selection
  11
- Programmable VFO Tuning Limits
  12
- Basic Receiving Functions
  13
Transmitter Operation

13
- To Transmit
  13
- Changing Transmitter Output Power
  14
- Tx.stop Function
  14
- Time out Timer
  14
Using the Memory

15
- Microprocessor Memory Backup
  15
- Initializing the Memory
  15
- Memory Channel
  15
- Memory Contents
  16
- Entering Memory Data
  16
- Entering Split Channel Frequencies
  16
- Entering the Call Channel Frequencies
  17
- Recalling Memory Channels
  18
- Memory Shift
  18
- 10 Memory Channel Character Display
  18
Scanning

19
- Hold/Resume Programming
  19
- Scan Operation Cancel
  20
- Scan Options
  20
- Scanning Memory Channels
  21
- Scanning Band
  21
- Programmable Band Scan
  21
- Mhz Scan
  22
- Vfo/Memory Scan
  23
- CALL/VFO Scan
  23
- 10 CALL / Memory Scan
  23
- Vfo/Memory/Call Scan
  23
- 12 The Alert Function
  23
Repeater Operation

24
- Transmitter Offsets
  24
- Selecting the Offset Direction
  24
- Automatic Offset Selection
  24
- Manual Offset Selection
  24
- The Reverse Function
  24
- Tone Selection
  25
- Autopatch Operations
  26
- DTMF Memory
  27
Operation as a Repeater

28
Ctcss Operation

28
The Dual Tone Squelch System (Dtss)

29
- DTSS Code
  29
- DTS Code
  29
- Using the DTSS Function
  29
- Using DTSS with a Repeater
  30
Paging

30
- Paging Operation Overview
  30
- Paging Code Memory
  31
- Setting Paging Codes
  31
- Sending Pages (Calling)
  33
- Receiving Pages (Wait)
  34
- Canceling Signal Squelch
  35
- Locking out Codes
  35
- Answer-Back
  35
Message Transmission and Reception

36
- Message Transmission Modes
  36
- Using the Message Memory
  36
- Message Memory Check
  37
- Message Memory Transmission
  37
- Message Reception
  37
- Receive Message Memory
  38
Enhanced Receiver Functions

39
- The Tone Alert System
  39
- Monitor
  40
- Beep off
  40
- Lamp
  40
- Key Lock
  40
- Volume Adjustment When You Use an Earphone
  40
- Switching Speaker Output When a Speaker-Microphone Is Connected
  41
- Automatic Band Change Function
  41
- Simultaneous Receive Function of Two Signals in the same Band
  41
- 10. Single Band Operation
  42
- 11 Mhz Mode
  42
- 12 Channelized Frequency Display
  42
Power Saver Features

43
- The Battery Saver Mode
  43
- Automatic Power off (APO)
  43
Clock Function

44
- Timer Setting
  44
- Timer Function
  44
Duplex Operation

45
Power on Message and Function

46
- Power on Message
  46
- Function Message
  46
Troubleshooting

48
Accessories

49

Kenwood TH-78A Instruction Manual (72 pages)

144/430 and 144/440 MHz Fm dual bander

Brand: Kenwood | Category: Two-Way Radio | Size: 36.92 MB

Kenwood TH-78A Instructions (4 pages)

Brand: Kenwood | Category: Transceiver | Size: 0.14 MB

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More Kenwood Manuals

Kenwood TH-78A Manuals

Kenwood TH-78A Service Manual (114 pages)

Table of Contents

Kenwood TH-78A Instruction Manual (69 pages)

Table of Contents

Accessories

Before Operation

The Battery Pack

Recharging

Receiver Operation

Transmitter Operation

Using the Memory

Scanning

Repeater Operation

Operation as a Repeater

Ctcss Operation

The Dual Tone Squelch System (Dtss)

Paging

Message Transmission and Reception

Enhanced Receiver Functions

Power Saver Features

Clock Function

Duplex Operation

Power on Message and Function Message

Maintenance

Troubleshooting

Accessories

Quick Reference

Kenwood TH-78A Instruction Manual (52 pages)

Table of Contents

Controls Overview

The Battery Pack

Receiver Operation

Transmitter Operation

Using the Memory

Scanning

Repeater Operation

Operation as a Repeater

Ctcss Operation

The Dual Tone Squelch System (Dtss)

Paging

Message Transmission and Reception

Enhanced Receiver Functions

Power Saver Features

Clock Function

Duplex Operation

Power on Message and Function

Troubleshooting

Accessories

Kenwood TH-78A Instruction Manual (72 pages)

Kenwood TH-78A Instructions (4 pages)

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