Parts List
Table Of Contents
- 1GENERAL
- 2SYSTEM OVERVIEW
- 2.1Transmitter Operation
- 2.2Frequency Selection
- 2.2.1Synthesizer Transmitter
- 2.3Transmitter Assembly and Adjustment
- 2.3.1Complete Transmitter Alignment
- 2.3.2Frequency Change
- 2.3.3Output Power Adjustment
- 2.3.4Deviation Setting
- 2.3.5Setting RF Alarm Thresholds
- 2.4Recommended Test Equipment List
- 2.5Repair Note
- 2.6Printed Circuitboard Numbering Convention
- 3ILLUSTRATIONS
- 4PARTS LIST
- 5REVISION HISTORY
- TRANSMITTER MAIN BOARD
- 1GENERAL
- 2THEORY OF OPERATION
- 2.1 Transmitter Main Board
- 2.1.1General
- 2.1.2Transmitter Push-To-Talk
- 2.1.2.1Microphone PTT
- 2.1.2.2PTT With Time-Out-Timer
- 2.1.2.3PTT No Time-Out-Timer
- 2.1.2.4Optional Relay
- 2.1.2.5PTT Output
- 2.1.2.6PTT Voltage Switching
- 2.1.2.7Transmitter Standby Modes
- 2.1.3Audio Circuits
- 2.1.3.1Microphone Audio
- 2.1.3.2Received Audio
- 2.1.4Channel Selection
- 2.1.4.1Synthesized Transmitter
- 2.1.4.2Crystal Controlled Transmitter
- 2.1.5Amplifier Circuits
- 2.1.6Time-Out-Timer Circuitry
- 2.2MT-3 Front Panel Board
- 2.3MT-3 Audio Processor (Version 1.6)
- 2.3.1General
- 2.3.2Power Requirements
- 2.3.3Audio Processor Turn-on Time
- 2.3.4Audio Processor Signals
- 2.3.4.1Audio Processor Outputs
- 2.3.4.2Audio Processor Modulation Output
- 2.3.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.3.4.4Audio Processor Inputs
- 2.3.4.5Audio Processor Microphone Input
- 2.3.4.6Audio Processor Balanced Input
- 2.3.4.7Audio Processor Auxiliary Input
- 2.3.4.8Audio Processor Subtone Inputs
- 2.3.4.9Audio Processor Direct Modulation Input
- 2.4MT-3 Audio Processor (Version 1.8)
- 2.4.1General
- 2.4.2Power Requirements
- 2.4.3Audio Processor Turn-on Time
- 2.4.4Audio Processor Signals
- 2.4.4.1Audio Processor Outputs
- 2.4.4.2Audio Processor Modulation Output
- 2.4.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.4.4.4Audio Processor Inputs
- 2.4.4.5Audio Processor Microphone Input
- 2.4.4.6Audio Processor Balanced Input
- 2.4.4.7Audio Processor Auxiliary Input
- 2.4.4.8Audio Processor Subtone Inputs
- 2.4.4.9Audio Processor Direct Modulation Input
- 2.5Low Frequency Modulation
- 3TRANSMITTER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Printed Circuitboard Numbering Convention
- 3.4Recommended Test Equipment List
- 3.5Standard Factory Settings and Jumper Configuration
- 3.5.1MT-3 Transmitter Board Factory Configuration
- 3.5.2MT-3 Audio Processor Factory Configuration (Version 1.6)
- 3.6MT-3 Transmitter Board Alignment
- 3.6.1General
- 3.6.2MT-3 Transmitter Board Test Points
- 3.7Module Installation and Removal
- 3.8MT-3 Audio Processor Alignment (Version 1.6)
- 3.8.1General
- 3.8.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.9Standard Factory Settings and Jumper Configuration
- 3.9.1MT-3 Audio Processor Factory Configuration (Version 1.8)
- 3.10MT-3 Audio Processor Alignment (Version 1.8)
- 3.10.1General
- 3.10.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.11Low Frequency Modulation Configuration
- 3.11.1MT-3 Transmitters
- 3.11.2MT-3 Transmitter Audio Processors
- 3.11.3Synthesizer and Crystal Controlled Oscillator
- 3.11.4Tuning the Transmitter
- 4TRANSMITTER INTERCONNECT PIN DEFINITIONS
- 5ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5.1Transmitter Block Diagram
- 5.2Transmitter Main Board Electrical Assembly
- 5.2.1Transmitter Main Board Top Side Component Layout
- 5.2.2Transmitter Main Board Bottom Side Component Layout
- 5.2.3Transmitter Main Board Schematic Diagram
- 5.3Front Panel Board
- 5.3.1Front Panel Board Component Layout
- 5.3.2Front Panel Board Schematic
- 5.4Audio Processor Electrical Assembly (Version 1.6)
- 5.4.1Audio Processor Component Layout
- 5.4.2Audio Processor Schematic Diagram
- 5.5Audio Processor Electrical Assembly (Version 1.8)
- 5.5.1Audio Processor Component Layout
- 5.5.2Audio Processor Schematic Diagram
- 6PARTS LISTS
- 6.1Transmitter Main Board Parts List
- 6.1.1Transmitter Main Board Electrical Parts List
- 6.1.2Transmitter Main Board Mechanical Parts List
- 6.1.3MT-3 Front Panel Board Electrical Parts List
- 6.2MT-3 Audio Processor Parts List (Version 1.6)
- 6.2.1MT-3 Audio Processor Electrical Parts List (Version 1.6)
- 6.3MT-3 Audio Processor Parts List (Version 1.8)
- 6.3.1MT-3 Audio Processor Electrical Parts List (Version 1.8)
- 7REVISION HISTORY
- AUDIO PROCESSOR
- 1 FM AUDIO PROCESSOR
- 2 SIGNALS
- 3 THEORY OF OPERATION
- 4 ALIGNMENT
- 5 TROUBLESHOOTING - TEST EQUIPMENT NEEDED
- 6 TEMPERATURE COMPENSATION
- 7 ILLUSTRATIONS, TABLES AND SCHEMATIC DIAGRAMS
- 8 FM AUDIO PROCESSOR PARTS LIST
- 9 AM AUDIO PROCESSOR
- 9.1 Introduction
- 9.2 Performance Specifications
- 9.3 Audio Specifications
- 9.4 Audio Circuits
- 9.5 Power Requirements
- 9.6 Transmitter Standby Modes
- 9.7 Audio Circuitry
- 9.8 AM Audio Processor Factory Configuration
- 9.9 AM Audio Processor Alignment
- 9.10 AM Audio Processor Electrical Parts List
- 9.11 AM Audio Processor Component Layout
- 9.12 AM Audio Processor Schematic Diagram
- 10 REVISION HISTORY
- VHF AMPLIFIER
- 1GENERAL
- 2THEORY OF OPERATION
- 3VT-3/150 AMPLIFIER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Recommended Test Equipment List
- 3.4Printed Circuitboard Numbering Convention
- 3.5Standard Factory Settings and Jumper Configuration
- 3.6VT-3/150 Amplifier Alignment
- 3.6.1General
- 3.6.2VT-3/150 Amplifier Adjustment
- 3.6.2.1General Set-Up
- 3.6.2.2Output Power Alarm (Forward Power)
- 3.6.2.3Output Power
- 3.6.2.4Antenna VSWR Alarm (Reverse Power)
- 3.6.2.5Antenna VSWR Overload
- 3.6.2.6Procedure Verification
- 4ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5PARTS LISTS
- 6REVISION HISTORY
- ENHANCED AM/FM SYNTHESIZER
- 1. GENERAL
- 2. THEORY OF OPERATION
- 2.1 Internal Power and Control (Digital Board)
- 2.2 Synthesizer Analog Circuitry (Analog Board)
- 2.2.1 Common Analog Board Circuitry
- 2.2.2 29 - 71.4 MHz Analog Board Circuitry
- 2.2.3 118 - 159.4 MHz Multichannel AM Analog Board Circuitry
- 2.2.4 128 - 174 MHz Analog Board Circuitry
- 2.2.5 406 - 470 MHz Analog Board Circuitry
- 2.3 Synthesizer Digital Circuitry (Digital Board)
- 2.4 Frequency Control
- 2.4.1 BCD Switch Frequency Control
- 2.4.2 Frequency Select Handle Frequency Control
- 2.5 Synthesizer Base and Frequency Increment Table
- 2.6 5.0/6.25 kHz Channelization.
- 2.7 8.333 kHz Channelization.
- 2.8 12.5 kHz Channelization.
- 3. SYNTHESIZER ALIGNMENT
- 3.1 General
- 3.2 Repair Note
- 3.3 Recommended Test Equipment
- 3.4 OS(R/T)-3(A/H) Synthesizer Factory Configuration
- 3.5 OS(R/T)-3(A/H) Synthesizer Alignment
- 3.5.1 General
- 3.5.2 Synthesizer Test Points
- 3.5.3 Synthesizer Removal and Installation
- 3.5.4 Circuit Board Removal
- 3.5.5 Frequency Adjustment and Channel Selection
- 3.5.5.1 VHF OS(R/T)-3H 29 - 71.4 MHz VCO Alignment
- 3.5.5.2 VHF OS(R/T)-3A 118 - 159.4 MHz Alignment
- 3.5.5.3 VHF OS(R/T)-3H 128 - 174 MHz VCO Alignment
- 3.5.5.4 UHF OS(R/T)-3H 406 - 470 MHz VCO Alignment
- 3.5.5.5 Reference Frequency Alignment
- 3.5.6 Jumper Configuration
- 4. ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 4.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Diagrams
- 4.1.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Bottom)
- 4.1.2 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Top)
- 4.1.3 OS(R/T)-3H 29 - 71.4 MHz Analog Board Schematic Diagram
- 4.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Diagrams
- 4.2.1 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Bottom)
- 4.2.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Top)
- 4.2.3 OS(R/T)-3A 118 - 159.4 MHz Analog Board Schematic Diagram
- 4.3 OS(R/T)-3H 128 - 174 MHz Analog Board Diagrams
- 4.3.1 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Bottom)
- 4.3.2 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Top)
- 4.3.3 OS(R/T)-3H 128 - 174 MHz Analog Board Schematic Diagram
- 4.4 OS(R/T)-3H 406 - 470 MHz Analog Board Diagrams
- 4.4.1 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Bottom)
- 4.4.2 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Top)
- 4.4.3 OS(R/T)-3H 406 - 470 MHz Analog Board Schematic Diagram
- 4.5 OS(R/T)-3(A/H) Digital Board Diagrams
- 4.5.1 OS(R/T)-3(A/H) Digital Board Component Layout (Bottom)
- 4.5.2 OS(R/T)-3(A/H) Digital Board Component Layout (Top)
- 4.5.3 OS(R/T)-3(A/H) Digital Board Schematic Diagram
- 5. PARTS LISTS
- 5.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Electrical Parts List
- 5.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Electrical Parts List
- 5.3 OS(R/T)-3H 128 - 174 MHz Analog Board Electrical Parts List
- 5.4 OS(R/T)-3H 406 - 470 MHz Analog Board Electrical Parts List
- 5.5 OS(R/T)-3(A/H) Digital Board Electrical Parts List
- 5.6 OS(R/T)-3(A/H) Synthesizer Mechanical Parts List
- 6. REVISION HISTORY
- VHF CHANNEL DESIGNATION TABLES
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
M
M
N
N
O
O
P
P
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
1 1
0 0
R1 C2
R2  C3
R3 C8
R4 F4
R5 D5
R6 E4
R7 G4
R8 G3
R9 G3
R10 G5
R11 H6
R12 N8
R13 H1
R14 H2
R15 H2
R16 J5
R17 J4
R18 J4
R19 L5
R20 K5
R21 L7
R22 L7
R23 L5
R24 L5
R25 L5
R76 E5
R77 L7
R78 N8
R79 K7
R80 N8
R81 O8
R82 F6
R83 N8
R84 I4
R85 K4
R86 N6
R87 D9
R88 N7
R89 O7
C51 B6
C52 D8
C53 I2
C54 J2
C55 L8
C56 O7
FB1  B3
JU1  G3
JU2 G4
JU3 L5
JU4  B8
JU5  E6
JU6  P5
JU7  K6
JU8 O6
JU9 I6
JU10 D6
JU11 C5
JU12 B5
JU13 B8
JU14 H6
JU15 H2
JU16 H7
JU17 C5
JU18 L7
JU19 J6
JU20 C8
JU21 K7
JU22 N5
JU23 N7
JU24 K5
JU25 L7
JU26 I8
JU27 D8
JU28 B8
JU29 O6
JU30 N/A
JU31 L6
JU32 O7
JU33 F6
JU34 M7
JU35 N8
JU36 D2
JU37 P8
JU38 O7
JU39 N8
JU40 N/A
JU41 O8
JU42 D8
JU43 B9
JU44 O7
JU45 O7
P1-1 A4
P1-2 A5
P1-3 A3
P1-4 A3
P2-1 A6
P2-2 A7
P2-3 A4
P2-4 A4
P3-1 P6
P3-2 J9
P3-3 A4
P3-4 A9
P4-4 A7
P4-1 A8
P4-3 A9
P4-2 P8
P9 N5
P10 N5
P11 M5
P12 M6
Q1 J7
R26 L5
R27 K4
R28 K5
R29 K6
R30 B5
R31 C5
R32 O8
R33 C8
R34 N7
R35 N7
R36 N7
R37 N7
R38 F4
R39 D3
R40 H7
R41 D3
R42 E7
R43 H7
R44 O8
R45 O9
R46 B6
R47 D8
R48 E6
R49 E6
R50 M7
R51 C4
R52 G6
R53 O8
R54 P8
R55 J7
R56 D2
R57 F6
R58 K7
R59 D3
R60 F3
R61 E3
R62 D4
R63 F3
R64 D5
R65 G5
R66 O5
R67 O5
R68 M5
R69 M5
R70 C9
R71 I1
R72 K6
R73 E5
R74 E3
R75 K8
C26 F3
C27 O7
C28 M7
C29 B9
C30 D4
C31 B9
C32 F6
C33 O6
C34 P8
C35 D3
C36 G3
C37 G3
C38 H6
C39 H7
C40 O6
C41 O8
C42 E3
C43 J5
C44 N7
C45 M6
C46 O6
C47 O7
C48 G1
C49 K4
C50 J4
COMPONENT LOCATION TABLE
DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC DES LOC
C1 D3
C2 E4
C3 I1
C4 D2
C5 C3
C6 O5
C7 E5
C8 F4
C9 D4
C10 F7
C11 N/A
C12 O7
C13 D2
C14 E6
C15 G4
C16 F6
C17 I4
C18 G1
C19 G5
C20 H2
C21 M5
C22 C9
C23 N7
C24  N6
C25 E2
DES LOC
U1a D2
U1b D4
U2a I2
U2b D8
U2c F6
U2d G6
U3a J4
U3b L4
U3c O8
U3d N6
U4 N5
U5 M7
U6 M8
DES LOC
TP1 I2
TP2 E7
TP3 F4
TP4 C4
TP5 L4
TP6 G6
TP7 J7
TP8 O6
TP9 O7
TP10 J5
TP11 D3
TP12 F2
TP13 D8
TP14 K5
DES LOC
DANIELS
ELECTRONICS LTD.
TM
VICTORIA B.C.
DE
DANIELS
ELECTRONICS
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DWG No: MT3APM2F
WIRE JUMPER
FOR UHF ONLY
DWG REV DATE: 03 OCT 2000
BOARD REV: VERSION 2.3
BOARD No: 43-911923
R89
FM Audio Processor Board Instruction Manual
JU40C11 JU30
TCX
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DULA TI
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JU45
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HIGHEST REFERENCE DESIGNATORS
Y
X
Y
X
Y
X
-----
-----
-----
TWO PORT POLARITY
Y
X
PRE-EMPHASIS
FLAT AUDIO
DATE: 19 APR 2000
4
.
0
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MICR
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C
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PRE-EMPHASIS
FLAT AUDIO
BALA NC
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DWN BY: LARRY JOE
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VOICE + SUBAUDIBLE
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-----
-----
U6
Q1
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UNUSED REFERENCE DESIGNATORS
-----
10 P O LE LO WP AS S F
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Y
X
Y
X
Tx Au dio Con trol
OPTIONAL
Y
X
BALA NC
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P
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MICR
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TITLE: MT-3 TX AUDIO PROCESSOR SCHEMATIC DIAGRAM
YX
-----
AUXILIARY IN
P
UT
L
EVE
L C
O
NTR
O
L
NOT INSTALLED FOR DIGITAL MOD.
+9.5V CONTINUOUS
Y
X
Y
X
Y X
Y
X
LOW FREQUENCY / DIRECT
MODULATION OUTPUT
h
i
gh = vo
i
ce
l
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= da
t
a
D
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O
N
C
O
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DIRECT
MODULATION
INPUT
APRVD:
BALANCED INPUT
MICR
O
P
H
O
N
E
IN
P
UT
L
EVE
L C
O
NTR
O
L
PRE-EMPHASIS
FLAT AUDIO
BALA NC
E
D
IN
P
UT L
EVE
L
C
O
NTR
O
L
3
P1
2
P1
1
P1
4
P1
3
P3
3
P2
1
P2
1
P4
3
P4
1
P3
2
P4
4
P4
JU37
4
P2
+9.5V CONTINUOUS
4.7uF
C3
2
13
JU22
C10
10nF
+9.5V CONTINUOUS
4.7uF
C45
4.7uF
C28
4K53
R46
R16
100K
C17
10nF C49
10nF
1
2
3
R29
50K0
R55
49K9
R75
10K0
E
B
C
Q1
BC817-25
C5
10nF
1
2
3
R2
5K0
FB1
TP1
+8.0V SWD
+8.0V SWD
+8.0V SWD
+8.0V SWD
+8.0V SWD
JU6
JU31
4
P3
2
P3
R44
0R0
R45
N/I
C48
4.7uF
C50
4.7uF
C18
100nF
C12
1.0nF
R54
SEL
1
2
3
R36
50K0
1
2
3
JU5
JU32
47uF
C13
3
2
1
100K0
R48
680nF
C7
4.7uF
C8
TP3
SEL
R32
47uF
C31
47uF
C29
SEL
R57
N/I (22nF)
C32
JU29
47uF
C34
R12
N/I
Rect In
Var G
Rect Cap
Output
Inv In
R3
THD
Trim
15
14
16
10
12
11
9
U1
SA571D
a
680nF
C42
TP12
4.7uF
C26
Vcc
Rect In
Var G
Rect Cap
Output
Inv In
R3
THD
Trim
GND
2
3
1
7
5
6
8
13
4
SA571D
U1b
1
2
3
JU27
+9.5V CONTINUOUS
2
P2
JU16
R79
49K9
JU7
SEL
R23
N/I
R24
SEL
R25
N/I
R26
SEL
R28
SEL
R17
SEL
R18
SEL
R20
In+
In-
Gnd
V-
Vout
V+
Rx
Div/Clk
1
2
3
4
8
7
6
5
U4
LTC1569-6
R66
22K1
R67
30K9
R68
3K48
R69
2K00
+8.0V SWD
P11
P12
P9
P10
2
3
11
1
4
U2
MC33174
a
9
10
8
U2
MC33174
c
2
3
4
1
11
U3
MC33174
a
6
5
7
U3
MC33174
b
9
10
8
U3
MC33174
c
1 2
R19
SEL
1 2
SEL
R27
R74
N/I
R73
N/I
0R0
R72
0R0
R58
1
2
C21
1.0uF
1
2
C6
1.0uF
R37
49K9
R34
49K9
+8.0V SWD
C20
10nF
13
12
14
U2
MC33174
d
4.0V
TO ALL 4.0V SUPPLY POINTS
4.0V
4.0V
C24
10nF
10K0
R13
10K0
R15
4.0V
+8.0V SWD
4.0V
JU23
TP5
TP6
TP7
TP8
TP9
R43
11K8
C39
2.2uF
SEL
R81
JU41
10nF
C41
3
2
1
5K0
R42
C35
1.0uF
C1
1.0uF
C9
1.0uF
C30
1.0uF
R3
100K
R33
100K
R47
100K
R82
10K0
C37
3.3nF
R84
10K0
R85
10K0
R86
10K0
3
2
1
R83
50K0
R53
N/I
R80
27K4
+8.0V SWD
1
2
3
JU35
R78
10K0
R49
16k2
C14
10nF
4.0V
R76
16k2
C16
1.0uF
JU33
R71
5K11
TP10
1
2
3
JU20
C51
1.0uF
1
2
3
JU12
2
1
3
JU15
R39
15K4
R41
137K
R59
20K0
R62
15K4
R5
1M00
C25
1.0uF
R60
18K2
R61
18K2
R8
2K21
R9
49K9
R4
18K2
R6
18K2
330nF
C36
C15
3.3nF
R7
2K21
R10
49K9
330nF
C19
C2
1.0uF
R51
10K0
2
1
3
JU1
2
1
3
JU2
2
3
1
JU39
JU11
1 2
150pF
C43
1
2
3
JU34
JU38
3
2
1
R14
N/I (5K0)
TP11
TP4
JU10
R52
100K
R65
100K
C38
3.3nF
R11
2K21
R40
49K9
2
1
3
JU14
1
2
3
R31
5K0
R30
604R
TP2
C23
330pF
C44
330pF
13
12
14
U3
MC33174
d
C22
10nF
R70
10K0
R35
SEL
JU8
100nF
C27
1.0uF
C33
1.0uF
C40
1.0uF
C47
1.0uF
C46
1
2
3
JU42
6
5
7
U2
MC33174
b
MT-3 TX TIME-OUT-TIMER
J3
J2 J4
J1
P7
P6
P5
P8
1
2
3
R87
50K0
+8.0V SWD
TP13
1
2
3
JU25
R22
49K9
R21
49K9
1 2
3
4
5
U5
TC4S66F
1 2
3
4
5
U6
TC4S66F
4.0V
R50
49K9
R88
49K9
JU43
C52
150pF
1
2
3
JU4
JU26
JU28
JU13
4.0V
215R
R1
R64
100K
4.7uF
C53
C54
100nF
C55
100nF
R56
0R0
TP14
JU44
33nF
C56
4.0V
C4
1.0uF
+9.5V CONTINUOUS
R77
20K0
JU18
2
31
JU36
JU17
1
2
3
JU9
2
1 3
JU19
2
3
1
JU21
1 2
JU45
1
2
3
JU24
1
2
3
JU3
1
2
3
5K0
R63
3
2
1
5K0
R38
R89
100R
MICROPHONE INPUT
SUBTONE INPUT 2
SUBTONE INPUT 1
TONE/DIGITAL I/P