User's Manual
Table Of Contents
- Front Cover
- Contents
- List of Tables
- List of Figures
- Foreword
- Safety and General Information
- Introduction
- System Applications
- Models and Specifications
- Approved Accessories
- Setup and Connections
- Operation
- Troubleshooting
- Introduction
- Recommended Test Equipment
- Troubleshooting Procedures
- Module Replacement Procedures
- Preselector Field Tuning Procedure
- Functional Theory of Operation
- Schematics
- Back Cover
68P81093C75-O December 1, 2000 11-3
Figure 17. PDR 3500 Schematic Sheet 1
0
1
1
11
VHF R1
VHF R2
UHF R1
UHF R2
POWER SUPPLY +
POWER SUPPLY -
EXTERNAL DC +
EXTERNAL DC -
FAN
ANTENNA RELAY
PA POWER
SETTINGS FOR S1
1 2 BAND
0
0
0
2
P3
2
P3
1
P4
1
P1
P1
1
A+
P2
1
10
8
U4
MC74HC32A
1
2
3
MC74HC32A
U4
12
13
11
1
2
3
U4
MC74HC32A
4
5
6
MC74HC32A
U4
9
C22
470pF
MC74HC32A
U9
390
2.8V
VR2
U15
MC33074
9
10
8
R16
100pF
100pF
C19
C18
100pF
C17
100pF
81
A+
C16
C14
S1
0.1uF
C36
470pF
C35
470pF
LN+5
C34
0.1uF
R28
1K
R27
0
0
R26
1%
R25
0
Y
1
Y0
5
Y1
2
Y2
4
Y3
LN+5
33.2K
R24
GND
VCC
167
VEE
13
X
12
X0
14
X1
15
X2
11
X3
3
2
3
1
U2
10
A
9
B
ENABLE*
6
8
MC33074
U3
13
12
14
U3
MC33074
4
5
6
U5
MC74HC86
9
10
8
LN+5
U5
MC74HC86
1
2
3
MC74HC86
U5
18
VAG
13
VDD
20
VREF
14
VSS
10
A+
7
AN7
8
AN8
9
AN9
11
CS*
15
DIN
17
DOUT
16
EOC
19
SCLK
AN0
1
AN1
2
AN10
12
AN2
3
AN3
4
AN4
5
AN5
6
AN6
2
U8
P2
2
18.2K
R39
1%
P4
470pF
C47
4
Y3
0.1uF
C46
12
X0
14
X1
15
X2
11
X3
3
Y
1
Y0
5
Y1
2
Y2
10
A
9
B
6
ENABLE*
8
GND
VCC
167
VEE
13
X
U13
VR5
2.8V
C15
R31
10K
470pF
0.1uF
C2
470pF
9
10
8
C1
MC33074
U3
Y0
1
Y1
5
Y2
2
Y3
4
C21
0.1uF
16
VCCVEE
7
X
13
X0
12
X1
14
X2
15
X3
11
Y
3
U1
A
10
B
9
ENABLE*
6
GND
8
39pF
C58
470pF
C37
LN+5
15pF15pF
C53 C54C52
15pF
P5
1
A+
LN+5
LN+5
LN+5 LN+5
LN+5
Y1
5
Y2
2
Y3
4
16.2K
R21
1%
VEE
7
X
13
X0
12
X1
14
X2
15
X3
11
Y
3
Y0
1
U11
A
10
B
9
6
ENABLE*
GND
8
16
VCC
6
5
7
1%
10K
R48
LN+5
LN+5
LN+5
LN+5
MC33074
U3
P10
4
P10
10
9.6V
2
P10
8
P10
6
470pF
P10
470pF
C42
C45
470pF
C39
0.1uF
C38
11
X3
3
Y
1
Y0
5
Y1
2
Y2
4
Y3
ENABLE*
6
8
GND
VCC
167
VEE
13
X
12
X0
14
X1
15
X2
U12
10
A
9
B
R42
20K
S1
72
LN+5
R43
20K
P5
3
C59
39pF
L2
220nH
L8
220nH
L6
220nH
L4
220nH
C23
100pF
100pF
C24
C64
0.22uF
100pF
220nH
L3
C63
1%
R36
10K
5.62K
R32
1%
16.2K
R40
1%
R19
1%
1%
R34
10K
R13
5.62K
1%
R12
16.2K
18.2K
1%
5.62K
R10
1%
1%
P5
2
5.62K
R3
10.5K
R49
1%
D2
6
5
7
LN+5
U16
MC74HC00
1
2
3
LN+5
Q2
D
G
S
U15
MC33074
2
A+
Q1
D
G
S
1
P6
2
P7
1
P7
P8
4
J9
31
P6
P8
3
C60
100pF
R45
10K
2
3
1
R44
20K
MC33074
U15
C56
C55
39pF
39pF
C40
C57
39pF
L9
220nH
100pF
1%
R38
10K
R35
10K
L7
220nH
220nH
L5
1%
1%
R1
22.1K
10K
R2
1%
R20
10K
1%
R22
10.5K
R18
20K
20K
R17
1%
1%
R4
22.1K
1%
R11
32.4K
1%
R55
LN+5 LN+5
1%
R54
10K
10K
1
P8
2
100pF
C68
P8
C67
100pF
C69
100pF
C70
100pF
C71
100pF
220nH
C72
100pF
L11
220nH
L13
220nH
L12
C66
100pF
100pF
C65
3.9K
R61
10K
R62
9.6V
9.6V
Q5
D
G
S
R60
10K
10.5K
R37
1%
P9
3
P9
4
P9
5
1%
R41
10.5K
P9
2
Q4
D
G
S
P9
1
470pF
C62
LN+5
C61
470pF
C44
470pF
C43
0.22uF
C41
100pF
LN+5
LN+5
C80
C81
100pF
220nH
100pF
R6
L10
MC74HC00
U16
4
5
6
1K
R59
100
R33
22.6K
1%
R5
11.5K
6.2K
LN+5
1%
R51
R52
15K
R50
10K
100pF
C79
100
R14
LN+5
10K
R9
1%
Q3
D
G
S
LED_GREEN
PTT_REQ_SC
PTT_REQ_INV
1%
R46
10K
10K
R47
VFWD_FROM_PA VFINALFORWARD
VTEMP_FROM_PA
VCONTROL
VTEMP_FROM_PA
VFWD_FROM_PA
PATEMP
ANTRYKREYEDA+
LED_RED
LED_GREEN
LED_RED
PTT_SWITCH
RESET_SWITCH
PTT_REQ_INV
PTT_REQ_EX
PTT_SWITCH
SPIMOSI
SPIMISO
SPICLK
A4
A3
A0-CS1
A5
A1-CS2
A2
AMUXCTRL
BMUXCTRL
X3MUX
Y3MUX
X2MUX
Y2MUX
MAEPF-27076-O