MT-3 FM Transmitter Mainboard Instruction Manual
IM20-MT3TXMN
Illustrations and Schematics
42
fm audIo ProCeSSor Board SCHematIC dIaGram
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
HIGHEST REFERENCE DESIGNATORS
UNUSED REFERENCE DESIGNATORS
VICTORIA B.C.
elecTronics lTd.
daniels
FM AUDIO PROCESSOR - VHF LOW BAND SCHEMATIC DIAGRAM
DWG REV DATE: 19 Jan 2010
TP14
SUBTONE 1 INPUT
LEVEL CONTROL
DWG No: 03-S-05-01
TRANSMIT AUDIO CONTROL
BALANCED INPUT
VOICE +
SUBAUDIBLE
TWO PORT POLARITY
30 Gauge
wire added
REVISED BY: LARRY JOE
Trace Cut
BOARD No: 43-911923 Rev. 2.3
DATE: 19 APR 2000
R89
JU40
C11
JU30
JU45
C56
-----
-----
-----
-----
-----
U6
Q1
P12
FB1
-----
-----
DWN BY: LARRY JOE
APRVD:
TCXO MODULATION
LEVEL ADJUST
TCXO DC
LEVEL
ADJUST
INPUT DC LEVEL
ADJUST
Y
X
Y
X
Y
X
Y
X
PRE-EMPHASIS
FLAT AUDIO
Y
X
Y
X
Y
X
MICROPHONE
COMPRESSION
CONTROL
PRE-EMPHASIS
FLAT AUDIO
BALANCED
COMPRESSION
CONTROL
Y
X
Y
X
DCS, LTR
TEMPERATURE
COMPENSATION
LIMITER
Y
X
Y
X
Y
X
10 POLE LOWPASS FILTER
Y
X
Y
X
OPTIONAL
Y
X
BALANCED AGC PREAMP
MICROPHONE AGC PREAMP
Y
X
AUXILIARY INPUT
LEVEL CONTROL
NOT INSTALLED FOR DIGITAL MOD.
+9.5V CONTINUOUS
Y
X
Y
X
Y
X
Y
X
LOW FREQUENCY / DIRECT
MODULATION OUTPUT
DEVIATION
CONTROL
Y
X
DIRECT
MODULATION
INPUT
BALANCED INPUT
MICROPHONE INPUT
LEVEL CONTROL
PRE-EMPHASIS
FLAT AUDIO
BALANCED
INPUT LEVEL
CONTROL
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
C3
4.7uF
2
1
3
JU22
10nF
C10
+9.5V CONTINUOUS
C45
4.7uF
C28
4.7uF
R46
4K53
100K
R16
10nF
C17
10nF
C49
50K0
R29
49K9
R55
10K0
R75
E
B
C
BC817-25
Q1
10nF
C5
5K0
R2
FB1
TP1
+8.0V SWD
+8.0V SWD
+8.0V SWD
+8.0V SWD
+8.0V SWD
JU6
JU31
4
P3
2
P3
0R0
R44
N/I
R45
4.7uF
C48
4.7uF
C50
100nF
C18
1.0nF
C12
10K0
R54
50K0
R36
1
2
3
JU5
C13
47uF
R48
100K0
C7
680nF
C8
4.7uF
TP3
R32
51K1
C31
47uF
C29
47uF
R57
N/I
C32
N/I
C34
1uF
N/I
R12
Rect In
Var G
Rect Cap
Output
Inv In
R3
THD
Trim
15
14
16
10
12
11
9
a
SA571D
U1
C42
680nF
TP12
C26
4.7uF
Vcc
Rect In
Var G
Rect Cap
Output
Inv In
R3
THD
Trim
GND
2
3
1
7
5
6
8
13
4
b
U1
SA571D
JU27
+9.5V CONTINUOUS
2
P2
JU16
49K9
R79
JU7
R23
N/I
R24
N/I
R25
5K11
R26
N/I
R28
N/I
R17
11K8
R18 N/I
R20
11K8
In+
In-
Gnd
V-
Vout
V+
Rx
Div/Clk
1
2
3
4
8
7
6
5
LTC1569-6
U4
16K2
R66
56K2
R67
3K48
R68
2K00
R69
+8.0V SWD
P11
P12
P9
P10
2
3
11
1
4
a
MC33174
U2
9
10
8
c
MC33174
U2
2
3
4
1
11
a
MC33174
U3
6
5
7
b
MC33174
U3
N/I
R19-THD
N/I
R73
R72
0R0
R58
0R0
1.0uF
C21
1.0uF
C6
49K9
R37
+8.0V SWD
10nF
C20
13
12
14
d
MC33174
U2
4.0V
TO ALL 4.0V SUPPLY POINTS
4.0V
4.0V
10nF
C24
R13
10K0
R15
10K0
4.0V
4.0V
JU23
TP5
TP6
TP7
TP8
TP9
11K8
R43
680nF
C39
R81
N/I
JU41
C41
10nF
R42
5K0
1.0uF
C35
1.0uF
C1
1.0uF
C9
1.0uF
C30
100K
R3
100K
R33
100K
R47
10K0
R82
3.3nF
C37
10K0
R84
10K0
R85
10K0
R86
50K0
R83
N/I
R53
27K4
R80
+8.0V SWD
1
2
3
JU35
10K0
R78
16k2
R49
10nF
C14
4.0V
16k2
R76
1.0uF
C16
JU33
5K11
R71
TP10
1
2
3
JU20
1.0uF
C51
1
2
3
JU12
2
1
3
JU15
13K3
R39
137K
R41
221K
R59
15K4
R62
1M00
R5
1.0uF
C25
18K2
R60
2K21
R8
49K9
R9
18K2
R4
18K2
R6
C36
330nF
2K21
R7
49K9
R10
C19
330nF
1.0uF
C2
10K0
R51
2
1
3
JU1
2
1
3
JU2
2
3
1
JU39
JU11
C43
150pF
1
2
3
JU34
JU38
N/I
R14
TP11
TP4
JU10
100K
R52
100K
R65
3.3nF
C38
2K21
R11
49K9
R40
2
1
3
JU14
5K0
R31
604R
R30
TP2
330pF
C23
13
12
14
d
MC33174
U3
10nF
C22
10K0
R70
JU8
C27
100nF
C33
1.0uF
C40
1.0uF
C47
1.0uF
C46
1.0uF
1
2
3
JU42
6
5
7
b
MC33174
U2
50K0
R87
+8.0V SWD
TP13
1
2
3
JU25
49K9
R22
49K9
R21
1
2
3
4
5
TC4S66F
U5
1
2
3
4
5
TC4S66F
U6
4.0V
49K9
R50
49K9
R88
JU43
150pF
C52
1
2
3
JU4
JU26
JU28
JU13
4.0V
R1
0R0
100K
R64
C53
4.7uF
100nF
C54
100nF
C55
0R0
R56
TP14
4.0V
1.0uF
C4
+9.5V CONTINUOUS
20K0
R77
JU18
JU17
1
2
3
JU9
2
1
3
JU19
2
3
1
JU21
JU45
R63
5K0
R38
5K0
100R
R89
N/I
C44
9
10
8
c
MC33174
U3
R35
1K00
MT-3 TX TIME-OUT-TIMER
J3
J2
J4
J1
P7
P6
P5
P8
JU29
JU32
R27-THD N/I
33nF
C56
2
3
1
JU36
1
2
3
JU24
JU44
49K9
R34
+8.0V SWD
1
2
3
JU3
3.3nF
C15
N/I
R74
18K2
R61
R19-SMD N/I
R27-SMD 10K
MICROPHONE INPUT
SUBTONE INPUT 2
SUBTONE INPUT 1
TONE/DIGITAL I/P
Содержание MT-3 Series
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