Kenwood T-278N Manuals

Manuals and User Guides for Kenwood T-278N. We have 1 Kenwood T-278N manual available for free PDF download: Service Manual

Kenwood T-278N Service Manual (97 pages)

Brand: Kenwood | Category: Transceiver | Size: 12 MB

Contents
1
General
3
Introduction
3
Personnel Safety
3
Realignment
4
Controls and Keys
4
Getting Acquainted
4
Display
6
Transceiver Modes
7
Description of Mode Functions
8
Keyboard Entry for Mode Startup
10
Disabling the Self-Programming Function
10
Self Programming Flow Chart
12
Dealer Mode
14
Self Programming
14
Notice in Self-Programming Mode
20
QT Frequency
26
DQT Standard Table
26
Trunking Set Mode
27
Setting the Smartrunk II Panel Programming Mode
27
Outlines for Panel Programming Mode Settings
27
Wired Clone Mode
28
Master Side
28
Slave Side
29
Wireless Clone Mode
29
Test Mode
32
LCD All Lamp Mode
32
Destination Set Mode
32
Display Numbers for Destination Settings
33
Frequency Display Mode
34
Changing the Frequency
34
Qt
35
PC Mode
36
KPG-22 Description
36
Programming Software Description
36
All Reset
39
Auxiliary
39
Disassembly for Repair
40
Separating the Chassis from the Unit
40
Removing the Lever
40
Protecting the Ground Terminal of the RF Power Amplifier
41
Assembling the Case Assembly and Chassis
41
Assembling the Panel
41
Speaker Installation Location
42
Circuit Description
43
Frequency Configuration
43
Receiver System
43
Front End
44
First Mixer
44
IF Amplifier
44
AF Amplifier
45
Squelch
45
Receiver Signaling
45
Qt/Dqt
45
Dtmf
46
2-Tone
46
AF Amplifier and Squelch
46
Pll
47
PLL Circuit
47
Reference Oscillator Circuit
48
Transmitter
49
Transmit Audio
49
QT/DQT Encoder
49
VCO and RF Amplifier
50
Final Module
50
ANT Switch and LPF
50
Apc
50
Power Supply
52
Control System
52
Keys and Rotary Encoder Circuit
52
Semiconductor Data
53
Pin Connection Diagram
53
Voltage Selector
57
Block Diagram
57
Audio Amp
57
Description of Components
59
TX-RX Unit
59
Parts List
63
Capacitors
63
Resistors
63
Exploded View
71
Packing
72
Adjustment
73
Required Test Equipment
73
DC Ammeter
73
Power Meter
73
Adjustment Frequency List
75
Alignment Mode
76
Adjusting Transmit Power
76
Aligning the Battery Reference Value
77
Storing the BUSY Reference Value
77
Adjusting QT Deviation
78
Adjusting DQT Deviation
78
Jig for Adjustment
79
Section Common to the Transmitter and Receiver
80
Receiver Section Adjustment
80
BPF-Wave
86
PC Board Views
87
TX-RX Unit Component Side View
87
Foil Side View
88
Schematic Diagram
91
Level Diagram
93
Circuit Diagram
94
Specifications
94

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Kenwood T-278N Service Manual (97 pages)

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