Service manual

3-59
March 2000
Part No. 001-3139-502
RDM INTERFACE BOARD SCHEMATIC (1 OF 3)
FIGURE 3-48
FOLDOUT
DS101
ALARM DISPLAY
U101
14495L
DISPLAY DRIVER
2
3
4
5
7
8
9
10
5
6
9
10
2
3
1
15
4
14
13
12
1
6
f
g
e
dd
h 1
cc
bb
aa
A
B
C
D
CL
U105
MPD70320L-5
R10
10k
59
3
43
46
NM1
EA
CTS0
CTS1
48
51
52
54
DMARQ0
DMAAK0
TC0
DMARQ1
+5V
R111
10k
45
9
49
53
75
VTH
IC1
IC2
IC3
IC4
47
41
83
TXD1
RXD0
R/W
U11C
U12A
74HC32
U12B
1
2
3
5
4
6
8
9
10
2
MREQ
INTP0
67 70
U109C
U109D
5
6
12
11
J105
38400
19200
9600
4800
2400
1200
Y1
10 MHz
C1
10pF
C2
10pF
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
20
19
18
17
16
15
14
13
81
RESET
A18
40
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
A19
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
12
11
10
9
8
7
6
5
27
26
23
25
4
28
29
3
2
1
Vpp
OE
WE
CE
24
31
22
+12V
30
PWD
D0
D1
D2
D3
D4
D5
D6
D7
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
21
20
19
18
17
15
14
13
DATA BUS (7:0)
R105
10k
+5V
R102
10k
R101
0
S101
RESET
68
3
1
2
4
7
ST
TD
PBRST
TDL
GND
RST
Vcc
U102
RESET
3 DISABLE
2
1 WATCHDOG
J104
U120B
U120A
74HC00
4
6
5
3
1
2
D
20
21
22
23
C
B
A
O14 O15
U119
74HC154
A19
A18
A17
A16
Q2
O0
3
1
18
19
G2
G1
17
Q15
G1
A13
A14
A15
23
22
21
18
A
B
C
O3
O0
U113
74HC154
6
4
3
O5
G2
19
D0
D1
D2
D3
D4
D5
D6
D7
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
19
18
17
16
15
13
12
11
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
10
9
8
7
8
5
4
5
25
24
21
23
2
26
1
U8
60L256
EPROM
U3
28F001BX
FLASH MEMORYMAIN MICROPROCESSOR
OE
R/W
CE
22
27
20
+5V
Q101
3612
R103
100k
R104
4.7k
Q102
1300
R108
10k
R107
4.7k
R105
10k
U108C
8
9
10
U108B
6
4
5
U108A
2
1
3
R109
10k
+5V
66
64
READY
T OUT
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
1
O1
O2
O4
2
5
68 69 71
72
INTP1
PT2 PT3 PT4 CLK OUT
2
4
6
8
10
12
1
3
5
7
9
11
J105
WATCHDOG
TIMER RESET
MREQ
U107
28C64
D0
D1
D2
19
18
17
16
D3
D4
D5
D6
15
14
13
12
D7
Q1
Q2
Q3
Q4
Q5
Q6
23
CE
Q7
U114
74HC574
D0
D1
D2
2
3
4
5
D3
D4
D5
D6
6
7
8
9
D7
13
D1
D2
D3
D4
D5
D6
D7
11
CLK
Q7
D8 Q8
12
U115
74HC574
D0
D1
D2
2
3
4
5
D3
D4
D5
D6
6
7
8
9
D7
Q1
Q2
Q3
Q4
Q5
Q6
19
18
17
16
15
14
13
D1
D2
D3
D4
D5
D6
D7
11
CLK
Q7
D8
U116
74HC574
D0
D1
D2
2
3
4
5
D3
D4
D5
D6
6
7
8
9
D7
Q1
Q2
Q3
Q4
Q5
19
18
17
16
15
D1
D2
D3
D4
D5
D6
D7
11
CLK
D8
U117
74HC574
D0
D1
D2
2
3
4
5
D3
D4
D5
D6
6
7
8
9
D7
Q2
Q4
Q5
18
16
15
13
D1
D2
D3
D4
D5
D6
D7
14
Q6
Q7
D8
Q8
12
U220-9 (3) RF DATA C
U220-10 (3) RF DATA B
U220-11 (3) RF DATA A
U217A-1 (3) FSK TO AUDIO GATE
U212A-1 (3) RX AUDIO GATE
U212D-16 (3) LOCAL AUDIO MUTE
U212B-8 (3)
U211A-1 (3) RX OPTION GATE
U211D-16 (3) RX SQ ACTIVE
U211D-15 (3) NORM RX
U212D-16 (3) RX MUTE
U217B-8 (3) LOGIC SQ A-D
U217C-9 (3) DATA TO A-D
1716
Q8
1
OC
1
OC
1
OC
1
OC
U101
U102, U202, U206, U209, U214
U104, U107
U105
U106, U123, U124
U108, U111, U112, U120, U121, U122
U109
U110
U113
U114, U115, U116, U117, U118, U126
U125
U127
U128
U201, U204, U208
U203, U207, U210
U205, U215, U216
IC
PIN NUMBER
+5V -5V +9V +12V GND
16
8
4
16
7
42,77
14
9
4
10
20
12
8
4
11
4
8
32
14
50,80
28
16
26
20
40
24
28,1
16
4
4
8
1
8
8
R131
10k
+5V
RDM RS-232 3
RVM RS-232 12
REPEATER RS-232 11
RVM AUDIO 10
REPEATER AUDIO 9
INDIC IN 7
INDIC OUT 13
FSK AUDIO - 6
FSK AUDIO + 5
GROUND 8
15
14
BOARD TEST 4
1
+15V IN 2
J101
+15V
WO 101
WO 102
WO 103
WO 104
TO T201 (3)
J106
TO AUDIO REVERT OPTION
023-2000-710
UNDIC OUT 10
INDIC IN 9
REPEATER AUDIO 6
RVM AUDIO 8
RVM RS-232 11
REPEATER RS-232 13
RDM RS-232 12
RDM AUDIO 7
GROUND 4
14
+15V 1
15
+9V 2
16
-5V 3
RELAY CONTROL 5
WO 105
WO 106
WO 107
+15V
U212-2 (3)
+9V
-5V
J107
J108
1
2
2
1
P108
P107
67
68
PT0
PT1U124-25 (2)
U123-3 (2)
78
79
X1
X2
R132
10k
RXD1
84
MSTB
U122-5 (2)
U122-1 (2)
R110
10k
1
2
3
EPROM
FLASH
+5V
U109C
14 3
U109D
13 4
U109A
215
R115
10k
4 MODEM DCD
3 COMPUTER RX
2 COMPUTER TX
1 GROUND
J102
U110
82C51
19
3
11
TxD
RxD
CS
5
RST
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
20
19
18
17
16
15
14
13
U111
MC14024
U112BU112E
R116
10M
R117
2k
Y102
2.4575 MHz
C104
62pF
C103
62pF
11 310 4
2
Q6
Q5
Q4
Q3
Q2
Q1
RESET
12
11
9
6
5
4
1
CLK
Q7
3
76800
14 13
25
9
RxC
TxC
12
CLK
14
18
20
TxE
RxRDY
C1 D
RESET
RD WR
1013
21
UART
U118
ADC0804
RD
WR
R122
10k
C106
150pF
19
5
4
CLK IN
CLK R
INTR
WR RD
32
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
20
19
18
17
16
15
14
13
6
VIN+
15
16
14
U217D
RSSI SELECT
RSSI
R120
10k
R121
10k
C105
.1
+5V
9
VREF
13
O11
A15 20
D
1
CS
7
O6
U122-2 (2) RX FIFO
U122-4 (2) TX FIFO
FLIP-FLOP
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
RAM
OE
WE
25
31
11
10
9
8
7
6
5
4
29
28
24
27
3
R118
10k
R119
10k
20 RF DATA
18 RF CLOCK
J201
16 HS CS RX
12 SYN CS RX
INC
U/D
U220-6 (3) RF MUX2 INH
CLK
Q3
11
17
U211, U212, U217
U219
U220
13 4
18
16
7,8
NOTES:
1. ALL RESISTORS ARE IN OHMS AND CAPACITORS IN MICROFARADS UNLESS OTHERWISE SPECIFIED.
2. IC PIN NUMBERS NOT SHOWN.