This document contains a schematic diagram for a Digitech RP-20 main circuit board. It includes numerous components such as integrated circuits, resistors, capacitors, and other electrical parts. The schematic shows the connections between these components in the circuit design. Revision and part number information is provided in the header along with the company name and address.

1. ECN# DATE ECN# DATE
DESCRIPTION
DESCRIPTION
REV REV
|LINK
|055308A0.001
|055308A0.002
|055308A0.003
|055308A0.004
|055308A0.005
|055308A0.006
|055308A0.007
|055308A0.008
P0 PROTOTYPE 1-28-97
|055308A0.009
P1 PROTOTYPE 4-14-97
P2 PROTOTYPE 6-10-97
A0 PRODUCTION RELEASE 7-22-97
Tuesday, March 28, 2000
055308A0.000 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
0 9
Title
Size Document Number Rev
Date: Sheet of

2. COMP OUT LEVEL
INPUT
COMP THRESHOLD
COMP RATIO
Tuesday, March 28, 2000
055308A0.001 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
1 9
Title
Size Document Number Rev
Date: Sheet of
+12V
+12V
+12V
+12V
-12V
-12V
+12V
+12V
+12V
+12V
+12V
+5VA
+12V
+12V
-12V
-12V
-12V
-12V
-12V
-12V
+12V -12V
-12V
-12V
-12V
-12V
-12V
-12V
+12V
+5VA
-12V
-12V
-5VA
J1
J320118
2
5
4
1
3
6
P1
100K402030
1
2
3
Q2
2N5088
L2
FB260217
L1
FB260217
C48
.047MD7
R53
10K-7
C35
220PKD7
D3
1N4148R
R59
470K-7
D5
1N4148R
U9B
NJM4560/SM
5
6
7
8
C52
10NPME1
C47
15PJD7
R69
4.7K-7
U9A
NJM4560/SM
3
2
1
4
C14
.39J
C22
.047J
R33
10K-7
R36
6.8K-7
R23
20K-7
R32
4.7K-7
R37
22-7
R42
100K-7
R41
470K-7
C28
1M50E1
R45
1K-7
C31
10ME1
U7
THAT2252
SYM
4
BIAS
2
V+
8
IN
1
V-
5
GND
3
CAP
6
OUT
7
R39
330-7
R79
22-7
R38
22M
R76
100K-7
U11A
LF353/SM
3
2
1
4
R75
20K-7
R78
1K-7
D31
1N4148R
D32
1N4148R
R204
3.3K-7
U34C
LM1973A/SM
18
16
17
R206
0-7
U2A
LF353/SM
3
2
1
4
R58
3.3K-7
R68
15K-7
U8
2159
1
3
5
6
2
4
7
8
C51
10NPME1
R57
51-7
C59
50PJD1
R93
15K-7
U16B
LF353/SM
5
6
7
8
C154
10NPME1
U34A
LM1973A/SM
4
6
5
U16A
LF353/SM
3
2
1
4
R104
62K-7
R105
3.3K-7
C37
10NPME1
R63
2K-7
R62
1K-7
R60
1K-7
R61
2K-7
C36
10NPME1
U12C
4053/SM
Y
4
S
9
A
5
B
3
C26
120PKD1
R40
2K-7
U6A
NJM4560/SM
3
2
1
4
C42
2.2S50E
Q3
2N5088
R73
10K-7
R74
1M-7
C33
4.7ME1
R44
1M-7
R43
220K-7
C34
1LLM50E1
R51
10K-7 R47
1M-7
U34B
LM1973A/SM
2
20
1
R52
330K-7
R56
100K-7
R67
470K-7
U11B
LF353/SM
5
6
7
8
R55
1M-7
R49
330K-7
C38 .047MD7
R48
1M-7
R54
20K-7
R3
62K-7
R4
3.3K-7
U2B
LF353/SM
5
6
7
8
R103
10K-7
R102
47K-7
R101
4.7K-7
U14A
LF353/SM
3
2
1
4
C71
10NPME1
R121
10K-7
R123
3.3K-7
U19
2159
1
3
5
6
2
4
7
8
R122
51-7 C80
.0010J
R115
1M-7
C76
.0068J
U18B
LF353/SM
5
6
7
8
C100
10NPME1
R138
10K-7
L4
600UH-H
1
2
R85
0-7
R89
4.7K-7
R91
20K-7
R90 10K-7
U14B
LF353/SM
5
6
7
8
R88
10K-7
R140
3.3K-7
U22
2159
1
3
5
6
2
4
7
8
R139
51-7
R72
1M-7
R71
4.7K-7
R77
47K-7
C54
.0068J
U10A
NJM4560/SM
3
2
1
4
R134
10K-7
R133
OMIT
R132
20K-7
U18A
LF353/SM
3
2
1
4
C49
10NPME1
R83
2K-7
R84
1K-7
C53
10NPME1
R82
2K-7
R87
1K-7
U12A
4053/SM
Y
14
S
11
A
12
B
13
C39
120PKD1
R66
2K-7
U10B
NJM4560/SM
5
6
7
8
U12D
4053/SM
EN
6
VD
16
VS
8
VE
7
R200
47K-7
WAH CRTL
*COMP BYP
*WAH BYP
DRY
COMP ATTACK 1
COMP ATTACK 0
WAH OUT

3. Tuesday, March 28, 2000
055308A0.002 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
2 9
Title
Size Document Number Rev
Date: Sheet of
VCC VDD +5V VSS
VEE -12V
+12V
-12V
+12V
+12V
+12V
+12V
+12V
-12V
-12V
-12V
-12V
-5VA
+5VA
C184
10NPME1 R219
2K-7
R218
1K-7
C183
.047J
R217
7.5K-7
R216
6.8K-7
U37A
CD4052DA/SM
X0
12
X1
14
X2
15
X3
11
X
13
VEE
7
VSS
8
VDD
16
C143
.047J
R187
100K-7
U29A
LF353/SM
3
2
1
4
C185
10NPME1
R221
20K-7
R220
10K-7
R186
220K-7
C142
120PKD1
C151
.022J
C150
.010J
Q9
2N5088
R193
2K-7
R185
10K-7
R192
47K-7
C155
120PKD1
R197
470K-7
U32B
LF353/SM
5
6
7
8
R225
47K-7
C193
10NPME1
U43A
LM1972/SM
4
2
1
U32A
LF353/SM
3
2
1
4
C81
1NPME1
R109
2K-7
C69
.047J D6
1N4148R
D7
1N4148R
R110
100K-7
R100
100K-7
U15A
NJM4560/SM
3
2
1
4
C170
10NPME1
R213
47K-7
R212
27K-7
C169
10NPME1 R210
27K-7
R211
27K-7
C168
10NPME1 R207
47K-7
R208
20K-7
U37B
CD4052DA/SM
Y0
1
Y1
5
Y2
2
Y3
4
INH
6
A
10
B
9
Y
3
U12B
4053/SM
Y
15
S
10
A
2
B
1
C58
15PJD7
R92
47K-7
U15B
NJM4560/SM
5
6
7
8
C109
.010J
R152
100K-7
U25B
LF353/SM
5
6
7
8
R151
100K-7
D12
1N4148R
D18
1N4148R
D17
1N4148R
D13
1N4148R
C107
.0018J
U25A
LF353/SM
3
2
1
4
C121
1NPME1
R50
1K-7
R65
20K-7
R166
20K-7
R170
4.7K-7 C41
.47J D2
1N4148R
D4
1N4148R
R31
10K-7
U6B
NJM4560/SM
5
6
7
8
R27
10K-7
C57
10NPME1
U43B
LM1972/SM
20
17
19
R183
220K-7
R179
100K-7
R173
6.8K-7
C126
.010J
U30B
LF353/SM
5
6
7
8
R178
10K-7
R182
22K-7
R64
20K-7
R201
2K-7
R246
39K-7
R209
100K-7
WAH OUT
SS ADC IN
SS SEL 0
SS SEL 1
SS SEL 2

4. B+
Tuesday, March 28, 2000
055308A0.003 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
3 9
Title
Size Document Number Rev
Date: Sheet of
WAH OUT
WAH OUT
+12V
+12V
-12V
+12V
+12V
-12V
-12V
-12V
-12V
VLED/Vh
+5VA
-5VA
D16
1N4148R
PA1
PA1
1
C95
.010J R128
1M-7
R127
1M-7
R174
47K-7
U28B
LF353/SM
5
6
7
8
R175
33K-7
C125
.0022J
R176
10K-7
R180
10K-7
Q8
2N5088
C128
.047MD7
U17A
CD4052DA/SM
X0
12
X1
14
X2
15
X3
11
X
13
VEE
7
VSS
8
VDD
16
C96
.010J
R130
47K-7
R131
47K-7
R129
4.7K-7
R125
2K-7
D15
1N4148R
D10
1N4148R
D9
1N4148R
C102
47PJD7
R155
470K-7
U23B
LF353/SM
5
6
7
8
C5
1NPME1
U23A
LF353/SM
3
2
1
4
R156
10K-7
U27B
LM1972/SM
20
17
19
C4
.047MD7
R6
1M-7
H2B
PA5156
2
H2A
PA5156
1
H2C
PA5156
3
C3
33LLME1
R13
680-7
R12
2K-7
C23
.022J
C20
470PK500D
R25
100K-7
C32
33S63E
C29
33S63E
C30
33S63E
R46
4.7K-7
C24
.022J
R2
1M-7
R21
OMIT
C17
.10J
C15
.10J
R30
470K-7
H2E
PA5156
5
H2D
PA5156
4
R20
100K-7 C18
470PK500D
C10
220PKD7
R24
100K-7
R34
220K-7
R29
33K-7
C19
.10J
C25
.047J
R28
20K-7
R35
4.7K-7
C90
120PJD7
C92
.0010J
R177
15K-7
C123
.022J
C124
.022J
U29B
LF353/SM
5
6
7
8
R181
33K-7
C129
10NPME1
R124
2K-7
R126
2K-7
C16
.022J
C12
.022J
R14
1M-7
R17
100K-7
U1A
LF353/SM
3
2
1
4
U1B
LF353/SM
5
6
7
8
U28A
LF353/SM
3
2
1
4
C74
470PKD7
R97
33K-7
C68
.022J
C62
.022J
R107
220K-7
R98
33K-7
R96
1M-7
R94
22K-7
R114
10K-7
R111
10K-7
R99
0-7
R108
1M-7
U17B
CD4052DA/SM
Y0
1
Y1
5
Y2
2
Y3
4
INH
6
A
10
B
9
Y
3
R165
3.9M-7
U24A
LF353/SM
3
2
1
4
C105
1NPME1
R154
0-7
U27A
LM1972/SM
4
2
1
R189
220K-7
R190
100K-7
U30A
LF353/SM
3
2
1
4
R188
10K-7
R194
6.8K-7
C148
.010J
R196
22K-7
H1B
PA3156
2
H1C
PA3156
3
D11
1N4148R
R7
62K-7
R5
10K-7
H1A
PA3156
1
WAH OUT
TUBE ADC IN
TUBE BRIGHT
TUBE SEL 0
TUBE SEL 1
WAH OUT
WAH OUT

5. Tuesday, March 28, 2000
055308A0.004 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
4 9
Title
Size Document Number Rev
Date: Sheet of
TMS IN 1
LRCK
LRCK
SCLK
SCLK
TMS IN 1
SCLK
LRCK
+5V +5V +5V +5V +5V +5V
+12V
+5VA
+5VA
-12V
+5V
+5V
+5V
+5VA
+5VA
R289
20K-7
R290
20K-7
R288
20K-7
R291
20K-7
R268
20K-7
R262
20K-7
U47A
74HC139/SM
A
2
Y0
4
B
3
Y1
5
Y2
6
G
1
Y3
7
U46
TMS57070
AR1
56
AR2
57
ARLR1
78
ARLR2
79
ARBC1
46
ARBC2
47
DIV512(LRCK)
77
DIV8(SCK)
70
CLKIN
14
RST
86
CLKO
17
CLKM0
9
CLKM1
10
SEL5V/3V
83
LAV
71
LMV
72
BIO
42
EMPTY
54
DRDY
73
INT1
43
INT2
44
INT3
45
CS
63
HR
59
HRBCK
58
HRS
60
HX
53
HXBCK
61
HXS
62
HBCKS
64
HDIR
82
TCK
13
TDI
12
TDO
76
TMS
11
TRST
85
EMU1/OFF
75
EMU0
74
TEST3
41
TEST2
40
TEST1
39
TEST0
38
AX1
48
AX2
49
AX3
50
ED15
37
ED14
36
ED13
35
ED12
34
ED11
31
ED10
30
ED9
29
ED8
28
ED7
27
ED6
26
ED5
25
ED4
24
ED3
21
ED2
20
ED1
19
ED0
18
EA11/ED23
6
EA10/ED22
5
EA9/ED21
4
EA8/ED20
3
EA7/ED19
2
EA6/ED18
1
EA5/ED17
100
EA4/ED16
99
EA3
96
EA2
95
EA1
94
EA0
93
RAS
88
CAS
89
WE
92
IOE
87
AXLR1
69
AXLR2
55
AXBC1
67
AXBC2
68
MUTE
84
R270
10-7
R284
10-7
R286
10-7
R198
10.0K 1%-7
R199
10.0K 1%-7
U33B
LF353/SM
5
6
7
8
C189
.47J
R232
51-7
R237
100-7
C188
.47J R231
51-7
R236
100-7
C196
.0022J
U44
CS5335
VD+
6
VA+
3
SDATA
9
SCLK
8
LRCK
12
MCLK
7
FRAME
10
RST
18
DGND
5
AGND
4
AINL+
17
AINL-
16
CMOUT
15
AINR+
13
AINR-
14
OVFL
2
PU
11
HP DFT
1
DIF0
20
DIF1
19
C191
.47J
R234
51-7
R239
100-7
C197
.0022J
R203
10.0K 1%-7
R202
10.0K 1%-7
U33A
LF353/SM
3
2
1
4
C190
.47J
R233
51-7
R238
100-7
R248
10-7
R250
10-7
C206
.10KD7 C207
1M50E1
C205
.10KD7 C204
1M50E1
R249
100-7
U42
CS4327
VD+
6
VA+
3
AOUTL
14
CMFILT
16
AOUTR
13
AGND
4
DGND
5
SDATA
10
SCLK
9
LRCK
7
MCLK
8
DIF1
11 DIF0
15
DEM1
2 DEM0
1
AMUTE
12
R227
10-7
R228
10-7
R244
10-7
R242
10-7
C199
.10KD7 C186
1M50E1
C202
.10KD7 C203
1M50E1
C198
1M50E1
R253
10-7
LRCK
SCLK
CLK 512
*RESET
TXS
CKS
AN OUT L
AN OUT R
*RESET
TUBE ADC IN
SS ADC IN
CLK 256
TMS IN 2
*TMS CS
RXS
TMS
*TMS DRDY
*TMS EMPTY
*TMS LMV
*TMS LAV
TMS OUT 1
TMS OUT 2
TMS IN 1
LRCK
LRCK
SCLK
SCLK
TMS IN 1
SCLK
LRCK

6. Tuesday, March 28, 2000
055308A0.005 A0
RP-20 MAIN BOARD
Digitech
8760 S. Sandy Parkway
Sandy, Ut 84070
B
5 9
Title
Size Document Number Rev
Date: Sheet of
*RAS
DRA0 DRD0
*CAS DRA1 DRD1
DRA2 DRD2
DRA3 DRD3
DRA4 DRD4
*DWR DRA5 DRD5
DRA6 DRD6
DRA7 DRD7
DRA0 DRD8
DRA1 DRD9
DRA2 DRD10
DRA3 *RAS DRD11
DRA4 *CAS DRD12
DRA5 DRD13
DRA6 *DWR DRD14
DRA7 DRD15
DRD0
DRD1 DRA0 DRD16
DRD2 DRA1 DRD17
DRD3 DRA2 DRD18
DRD4 DRA3 DRD19
DRD5 DRA4 DRD20
DRD6 DRA5 DRD21
DRD7 DRA6 DRD22
ADDR0 DRD8 DRA7 DRD23
ADDR1 DRD9
ADDR2 DRD10
ADDR3 DRD11
ADDR4 DRD12 *RAS
ADDR5 DRD13 *CAS
DRD14
D0 DRD15 *DWR
D1 DRD16
D2 DRD17
D3 DRD18
D4 DRD19
D5 DRD20
D6 DRD21
D7 DRD22
DRD23
DRD[0..23]
DRA[0..7]
ADDR[0..5]
D[0..7]
+5v
X1
22.579MHZ-L
R313
1M-7
C219
22PJD7
C226
22PJD7
R310
200-7
R311
200-7
U51
SDISCII_100
RAS
26
CAS
29
DWR
23
DRAM_A0
50
DRAM_A1
48
DRAM_A2
47
DRAM_A3
45
DRAM_A4
44
DRAM_A5
43
DRAM_A6
42
DRAM_A7
41
DRAM_A8
40
DRAM_D0
1
DRAM_D1
6
DRAM_D2
7
DRAM_D3
9
DRAM_D4
10
DRAM_D5
12
DRAM_D6
13
DRAM_D7
14
DRAM_D8
15
DRAM_D9
16
DRAM_D10
17
DRAM_D11
18
DRAM_D12
19
DRAM_D13
20
DRAM_D14
21
DRAM_D15
22
DRAM_D16
31
DRAM_D17
32
DRAM_D18
33
DRAM_D19
34
DRAM_D20
35
DRAM_D21
36
DRAM_D22
37
DRAM_D23
38
I2S_IN0
76
I2S_IN1
73
LRCK
49
SCLK
46
I2S_OUT0
68
I2S_OUT1
55
I2S_OUT2
51
XTAL
82
EXTAL
81
CLK_OUT
75
CLK_IN
74
CLK_BUF_OUT
67
CLK_BUF_IN
65
SYNC
79
MASTER
83
BUS_A
72
BUS_B
71
BUS_C
70
BUS_D
69
RESET_IN
84
RESET_OUT
80
OVER_FLOW
97
UP_CS
93
UP_RD
96
UP_WR
94
UP_WR_OUT
95
UP_A0
92
UP_A1
91
UP_A2
90
UP_A3
89
UP_A4
88
UP_A5
87
UP_D0
56
UP_D1
57
UP_D2
58
UP_D3
59
UP_D4
60
UP_D5
61
UP_D6
62
UP_D7
63
INV_IN
24
INV_OUT
27
OR_IN1
11
OR_IN2
8
OR_OUT
4
TEST0
100
TEST1
99
TEST2
98
UP_ADR5NEG
85
R325
10-7
L15
FB260219
L16
FB260219
L14
FB260219
R316
0-7
R317
OMIT
(0-7)
R314
100-7
R315
100-7
U57
256KX16-70
A0
16
A1
17
A2
18
A3
19
A4
22
A5
23
A6
24
A7
25
A8
26
RAS
14
LCAS
29
UCAS
28
WE
13
OE
27
D1
2
D2
3
D3
4
D4
5
D5
7
D6
8
D7
9
D8
10
D9
31
D10
32
D11
33
D12
34
D13
36
D14
37
D15
38
D16
39
U56
256KX16-70
A0
16
A1
17
A2
18
A3
19
A4
22
A5
23
A6
24
A7
25
A8
26
RAS
14
LCAS
29
UCAS
28
WE
13
OE
27
D1
2
D2
3
D3
4
D4
5
D5
7
D6
8
D7
9
D8
10
D9
31
D10
32
D11
33
D12
34
D13
36
D14
37
D15
38
D16
39
R336
10K-7
R337
10K-7
R338
10K-7
R339
10K-7
R340
10K-7
R344
10K-7
R345
10K-7
R347
10K-7
DRD[0..23]
DRA[0..7]
ADDR[0..5]
D[0..7]
ADDR[0..5]
CLK 512
*RESET
*RD
*WR
D[0..7]
*SDISC EN
SCLK
LRCK
TMS OUT 2
CLK 256
TMS IN 2
TMS OUT 1
*ME
*WR
ROM *WR
*RAS
DRA0 DRD0
*CAS DRA1 DRD1
DRA2 DRD2
DRA3 DRD3
DRA4 DRD4
*DWR DRA5 DRD5
DRA6 DRD6
DRA7 DRD7
DRA0 DRD8
DRA1 DRD9
DRA2 DRD10
DRA3 *RAS DRD11
DRA4 *CAS DRD12
DRA5 DRD13
DRA6 *DWR DRD14
DRA7 DRD15
DRD0
DRD1 DRA0 DRD16
DRD2 DRA1 DRD17
DRD3 DRA2 DRD18
DRD4 DRA3 DRD19
DRD5 DRA4 DRD20
DRD6 DRA5 DRD21
DRD7 DRA6 DRD22
ADDR0 DRD8 DRA7 DRD23
ADDR1 DRD9
ADDR2 DRD10
ADDR3 DRD11
ADDR4 DRD12 *RAS
ADDR5 DRD13 *CAS
DRD14
D0 DRD15 *DWR
D1 DRD16
D2 DRD17
D3 DRD18
D4 DRD19
D5 DRD20
D6 DRD21
D7 DRD22
DRD23

7. RIGHT OUTPUT
LEFT/MONO OUTPUT
HEADPHONES
Tuesday, March 28, 2000
055308A0.006 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
6 9
Title
Size Document Number Rev
Date: Sheet of
VCC VDD +5V VSS
+12V
+12V
+12V
+12V
+12V
+12V
-12V
-12V
-12V
-12V
-12V
-12V
+12V
+12V
-12V
-12V
P2B
100K402113
5
3
2
P2A
100K402113
6
4
1
D19
1N4001R
C77
10ME1
R119
470K-7
R113
10K-7
R118
10K-7
C78
.0010J C85
150PMD1
R117
10K-7
C84
.0027J
U21B
LF353/SM
5
6
7
8
R112
6.8K-7
U20B
LF353/SM
5
6
7
8
R120
6.8K-7
R116
6.8K-7
C83
.010J
C56
1NPME1
R86
20K-7
C55
25PJD1
U13B
LF353/SM
5
6
7
8
C119
1NPME1
R164
1K-7
C113
120PJD7
L6
FB260217 J2
J320119
2
5
4
1
3
6
C97
10ME1
R142
470K-7
R143
10K-7
R144
10K-7
C101
.0010J
C98
150PMD1
R137
10K-7
C94
.0027J
U21A
LF353/SM
3
2
1
4
R136
6.8K-7
U20A
LF353/SM
3
2
1
4
C93
.010J R141
6.8K-7
R135
6.8K-7
C65
1NPME1
R95
20K-7
C73
25PJD1
U13A
LF353/SM
3
2
1
4
C103
1NPME1
R149
470K-7
R150
1K-7
C120
120PJD7
L7
FB260217 J3
J320119
2
5
4
1
3
6
R168
10K-7
U26A
LF353/SM
3
2
1
4
R184
2K-7
D20
1N4001R
D21
1N4001R
Q7
2N6726
3
2
1
R169
10-7
R163
100-7
C131
120PJD7
R162
10-7
Q6
2N6714
L9
FB260217
R167
33K-7
C147
120PJD7
L11
FB260217
C134
.047MD7
J4
J320119
2
5
4
1
3
6
L10
FB260217
C140
120PJD7
R160
100-7
Q5
2N6726
3
2
1
R159
10-7
R148
10-7
Q4
2N6714
R153
2K-7
U26B
LF353/SM
5
6
7
8
D14
1N4001R
R146
2K-7
R158
33K-7
R157
10K-7
R172
2K-7
L8
FB260217
C116
.047MD7
L5
FB260217
C99
.047MD7
R161
470K-7
AN OUT L
AN OUT R

8. MIDI IN
MIDI OUT/THRU
Tuesday, March 28, 2000
055308A0.007 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
7 9
Title
Size Document Number Rev
Date: Sheet of
D0
D1
D2
D3
D4
D5 ADDR0 D0
D6 ADDR1 D1
D7 ADDR2 D2
ADDR3 D3
ADDR0 ADDR4 D4
ADDR1 ADDR5 D5
ADDR2 ADDR6 D6
ADDR3 ADDR7 D7
ADDR4 ADDR8
ADDR5 ADDR9
ADDR6 ADDR10
ADDR7 ADDR11
ADDR8 ADDR12
ADDR9 ADDR13
ADDR10 ADDR14
ADDR11 A15
ADDR12 A16
ADDR13 A17
ADDR14 A18
ADDR15
ADDR16 ADDR19
ADDR17 ROM *RD
ADDR18
ADDR19
*RESET *IOE
*ME ADDR0 D0
ADDR1 D1
ADDR2 D2
ADDR3 D3
ADDR4 D4
ADDR5 D5
*WR ADDR6 D6
ADDR7 D7
*RD ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
BAT BKUP ADDR13
ADDR14
ADDR15
ADDR16
*RESET
ADDR19
*RD
*WR
BAT BKUP
ADDR11
ADDR12
ADDR13
ADDR10
ADDR14
A18 *IOE
D2 ADDR18
*RESET
A17 ADDR11
ADDR17 ADDR12
ADDR13
ADDR14 *OUTEN5
A16 ADDR10
ADDR16 *IOE
*RD
*RESET
A15
ADDR15
D7
D6
D5
D4
D3
D2 *RESET
D1
D0
*OUTEN5
*RD ROM *RD
*ME
ADDR[0..19]
D[0..7]
+5V
+5V
+5V
+5V
+5V
+5V
+5VPR
+5VA
+12V
+5VA
+12V
+5VA
+5VA
+5V
-12V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
J6
J320116
1
3
4
2
5
6
7
X2
20.000MHZ-L
TP1
TESTP
BT1
BTC241014
+
+ + -
-
-
-
-
-
-
1 2
BT2
BT241016
U38
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
U39
LA10502
B1
2
B2
3
B3
4
B4
5
B5
6
B6
7
B7
8
B8
9
VREF
10
VO
1
R215
1K-7
R145
22K-7
R147
470-7 C106
33LLME1
U24B
LF353/SM
5
6
7
8
U47B
74HC139/SM
A
14
Y0
12
B
13
Y1
11
Y2
10
G
15
Y3
9
R16
10K-7
R15
10K-7
C13
10NPME1
R19
10K-7
C8
1M50E1
R26
10K-7
U4
ADS1286
VREF
1
VCC
8
DCLOCK
7
DOUT
6
CS/SHDN
5
GND
4
IN-
3
IN+
2
U5
ADS1286
VREF
1
VCC
8
DCLOCK
7
DOUT
6
CS/SHDN
5
GND
4
IN-
3
IN+
2
R11
0-7
R9
OMIT
R10
OMIT
Q1
LPT80A-V
1
2
R8
0-7
R1
10K-7
JP1
SBRIDGE
2
1
D1
LEDR702082
R18
680-7
U3B
LF353/SM
5
6
7
8
U48A
74AC74/SM
D
2
Q
5
CLK
3
Q
6
PR
4 CL
1
U48B
74AC74/SM
D
12
Q
9
CLK
11
Q
8
PR
10 CL
13
U63A
74HC86/SM
1
2
3
U63B
74HC86/SM
4
5
6
U63C
74HC86/SM
9
10
8
U63D
74HC86/SM
12
13
11
U52
MC34064P
I
2
G
3
R
1
U60F
74HC04/SM
13 12
C232
4.7ME1
R321
4.7K-7
R332
27K-7
R334
100K-7
C236
22PJD7
U60A
74HC04/SM
1 2
U60B
74HC04/SM
3 4
U64
74HC138/SM
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
U65
74HC138/SM
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
U60C
74HC04/SM
5 6
C245
.047MD7
U60E
74HC04/SM
11 10
U62
128KX8_SRAM
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
3
CS1
22
OE
24
WE
29
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
VCC
32
GND
16
A15
31
A16
2
CS2
30
L20
FB260219
L21
FB260219
U66
Z8S180/S
XTAL
3
EXTAL
4
PHI
68
TXS
55
RXS/CTS
56
CKS
57
TXA0
48
CKA0/DREQ0
50
RXA0
49
RTS0
45
CTS0
46
DCD0
47
TXA1
51
CKA1/TEND0
54
RXA1
53
DREQ1
58
TEND1
59
RESET
8
NMI
9
INT0
10
INT1
11
INT2
12
BUSREQ
7
BUSACK
6
LIR
65
HALT
60
WAIT
5
REF
61
ST
13
E
64
RD
67
WR
66
ME
63
IOE
62
A19
35
A18/TOUT
33
A17
32
A16
31
A15
30
A14
29
A13
28
A12
27
A11
26
A10
25
A9
24
A8
23
A7
22
A6
21
A5
20
A4
19
A3
17
A2
16
A1
15
A0
14
D7
44
D6
43
D5
42
D4
41
D3
40
D2
39
D1
38
D0
37
C250
15PJD7
C252
22PJD7
U60D
74HC04/SM
9
8
R349
10K-7
C243
OMIT
(470PMD1)
R350
2K-7
Q26
2N4124
R352
200-7
L19
FB260217
L18
FB260217
J7
J320116
1 3
4
2
5
6 7
L17
FB260217
R348
200-7
R351
4.7K-7
D45
1N4148R
Q27
2N4124
C244
10ME1
D44
1N4148R
R343
100-7
R346
100-7
D43
1N4148R
U55
6N138
AN
2
CAT
3 OB
7
OUT
6
VCC
8
GND
5
R335
330-7
R333
3.3K-7
R353
1K-7
U3A
LF353/SM
3
2
1
4
R22
2K-7
U61
72-1423-04 (V1.00)
DQ0
13
DQ1
14
DQ2
15
DQ3
17
DQ4
18
DQ5
19
DQ6
20
DQ7
21
VCC
32
VSS
16
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
29
A15
3
A16
2
A17
30
A18
1
CE
22
OE
24
WE
31
ADDR[0..19]
D[0..7]
ADDR[0..19]
*WR
*RD
*OUTEN0
*OUTEN1
*OUTEN2
*OUTEN3
*OUTEN4
DISP EN
*RESET
*INEN0
*INEN1
*SDISC EN
D[0..7]
ADS CS
DCLOCK
WAH CRTL
D1 OUT
D2 OUT
DRY
TXS
RXS
CKS
ROM *WR
*ME
D0
D1
D2
D3
D4
D5 ADDR0 D0
D6 ADDR1 D1
D7 ADDR2 D2
ADDR3 D3
ADDR0 ADDR4 D4
ADDR1 ADDR5 D5
ADDR2 ADDR6 D6
ADDR3 ADDR7 D7
ADDR4 ADDR8
ADDR5 ADDR9
ADDR6 ADDR10
ADDR7 ADDR11
ADDR8 ADDR12
ADDR9 ADDR13
ADDR10 ADDR14
ADDR11 A15
ADDR12 A16
ADDR13 A17
ADDR14 A18
ADDR15
ADDR16 ADDR19
ADDR17 ROM *RD
ADDR18
ADDR19
*RESET *IOE
*ME ADDR0 D0
ADDR1 D1
ADDR2 D2
ADDR3 D3
ADDR4 D4
ADDR5 D5
*WR ADDR6 D6
ADDR7 D7
*RD ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
BAT BKUP ADDR13
ADDR14
ADDR15
ADDR16
*RESET
ADDR19
*RD
*WR
BAT BKUP
ADDR11
ADDR12
ADDR13
ADDR10
ADDR14
A18 *IOE
D2 ADDR18
*RESET
A17 ADDR11
ADDR17 ADDR12
ADDR13
ADDR14 *OUTEN5
A16 ADDR10
ADDR16 *IOE
*RD
*RESET
A15
ADDR15
D7
D6
D5
D4
D3
D2 *RESET
D1
D0
*OUTEN5
*RD ROM *RD
*ME

9. LCD CONNECTOR
UPPER FOOTSWITCH
BOARD CONNECTOR
LOWER FOOTSWITCH
BOARD CONNECTOR
FRONT BOARD
CONNECTOR
CLIP
Tuesday, March 28, 2000
055308A0.008 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
8 9
Title
Size Document Number Rev
Date: Sheet of
LEDCOL1
LEDCOL2
D0 LEDCOL3
D1
D2 LEDCOL4
D3
D4 D4
D5 D5
SWROW1
D6 D6
SWROW2
LEDROW1
D7 D7
SWROW3
LEDROW2
LEDROW3
D2 ENCODE1
D3 ENCODE2
D0
D1 LED1
D0
D1
D2
D3
D4 LED2
D5
D0 SWCOL1 D6
D1 SWCOL2 D7
D2 SWCOL3
D3 SWCOL4
LED3
LED4
D4 SWCOL5
D5 SWCOL6 D0
D6 SWCOL7 D1
D7 SWCOL8 D2
D3
D4
D5
D6
D7 LED5
D0
D1 L/S0 LED6
D2 L/S0
D3 L/S1
D4 L/S2
D5
D6
D7 LED7
SWCOL7
L/S1 LED8
SWCOL8
SWROW1
D0 SWROW2
D1
D2 SWROW3
D3 LED9
D4 LEDCOL3
D5
D6 L/S2 LEDCOL4
D7
LEDROW1
LED10
LED1 LEDROW2
LED2 LEDROW3
LED3
LED11
LED4
SWROW3
LED5 SWCOL5
SWROW2
LED6 SWCOL6
SWROW1 LED12
LED7 SWROW1
ENCODE1
LED8 SWROW2
ENCODE2
LED9 SWROW3
SWCOL4
D0 LED10 LEDCOL1
D1 SWCOL3
D2 LED11 LEDCOL2
D3 SWCOL2
D4 LED12 LEDROW1
D5 SWCOL1
D6 LEDROW2
D7
LEDROW3
D[0..7]
+5V
+5V
VLED/Vh
+12V
+5V
+5VA
-5VA
+5VA
-5VA
+5VA
-5VA
+5VA
-5VA
+5VA
+5VA
-5VA
-5VA
RC1
RC321214
Q25
2N4124
R309 680-7
U53A
74HC244A/SM
2
4
6
8
18
16
14
12
1
U53B
74HC244A/SM
11
13
15
17
9
7
5
3
19
U54A
74HC244A/SM
2
4
6
8
18
16
14
12
1
U54B
74HC244A/SM
11
13
15
17
9
7
5
3
19
U58
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
R341
1K-7
U59
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
R342
1K-7
R354
10-7
H7
HDR321083
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RCH2
RCH10079
RCH1
RCH10079
U43C
LM1972/SM
SDI SDO
CLK DGND
AGND
AGND
AGND
AGND
AGND
AGND
L/S
VDD
VDD
VSS
VSS
11
9
3
5
6
12
8
18
14
16
10
13
15
7
R245
2K-7
U34D
LM1973A/SM
SDI SDO
VDD
VSS
AGND
VSS
AGND
VDD
CD
CLK
DGND
11
9
10
14
3
12
13
15
19
7
8
R205
2K-7
U27C
LM1972/SM
SDI SDO
CLK DGND
AGND
AGND
AGND
AGND
AGND
AGND
L/S
VDD
VDD
VSS
VSS
11
9
3
5
6
12
8
18
14
16
10
13
15
7
R171
2K-7
R330
10K-7
R328
10K-7
R326
10K-7
R323
10K-7
R324
10K-7
R327
10K-7
R329
10K-7
R331
10K-7
U41
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
R223
1K-7
U50
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
R319
1K-7
U49
74HC574/SM
D0
2
Q0
19
D1
3
Q1
18
D2
4
Q2
17
D3
5
Q3
16
D4
6
Q4
15
D5
7
Q5
14
D6
8
Q6
13
D7
9
Q7
12
OE
1 CLK
11
R318
1K-7
H6
PA13X2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
H4A
PA10/2MM
1
H4B
PA10/2MM
2
H4C
PA10/2MM
3
H4D
PA10/2MM
4
H4E
PA10/2MM
5
H4F
PA10/2MM
6
H4G
PA10/2MM
7
H4H
PA10/2MM
8
H4I
PA10/2MM
9
H4J
PA10/2MM
10
H5A
PA10/2MM
1
H5B
PA10/2MM
2
H5C
PA10/2MM
3
H5D
PA10/2MM
4
H5E
PA10/2MM
5
H5F
PA10/2MM
6
H5G
PA10/2MM
7
H5H
PA10/2MM
8
H5I
PA10/2MM
9
H5J
PA10/2MM
10
R224 200-7
R226 200-7
R229 200-7
R230 200-7
R240
10K-7
R241
10K-7
R243
10K-7
Q11
2N4124
Q13
2N4124
Q12
2N4124
R254
100K-7
Q14
2N4124
R257 680-7
R256 680-7
R255 3.3K-7
R261 680-7
R260 680-7
R259 3.3K-7
Q15
2N4124
R258
100K-7
R267
100K-7
Q16
2N4124
R269 3.3K-7
R285 680-7
R283 680-7
R312 680-7
R308
3.3K-7
Q21
2N4124
R287
100K-7
R279
100K-7
Q20
2N4124
R282
680-7
R281 680-7
R280 3.3K-7
R307 680-7
R306 680-7
R305 3.3K-7
Q23
2N4124
R304
100K-7
R275
100K-7
Q19
2N4124
R278 680-7
R277 680-7
R276 3.3K-7
R303 680-7
R302 680-7
R301
3.3K-7
Q22
2N4124
R300
100K-7
R296
100K-7 R297 3.3K-7
R298 680-7
R299
680-7
R274 680-7
R273 680-7
R272 3.3K-7
Q18
2N4124
R271
100K-7
R292
100K-7
Q24
2N4124
R293 3.3K-7
R294 680-7
R295 680-7
R266 680-7
R265 680-7
R264
3.3K-7
Q17
2N4124
R263
100K-7
R106
1K-7
D8
LEDR702082
Q10
2N4124
R235
10K-7
R322
10K-7
R320
10K-7
D[0..7]
DISP EN
*INEN0
*INEN1
D[0..7]
*OUTEN0
*OUTEN1
*OUTEN2
*OUTEN3
DCLOCK
ADS CS
*OUTEN4
TUBE SEL 0
TUBE SEL 1
*COMP BYP
*WAH BYP
COMP ATTACK 0
COMP ATTACK 1
SS SEL 0
SS SEL 1
SS SEL 2
*TMS LAV
*TMS LMV
*TMS EMPTY
*TMS DRDY
*TMS CS
D1 OUT
D2 OUT
TMS
TUBE BRIGHT
LEDCOL1
LEDCOL2
D0 LEDCOL3
D1
D2 LEDCOL4
D3
D4 D4
D5 D5
SWROW1
D6 D6
SWROW2
LEDROW1
D7 D7
SWROW3
LEDROW2
LEDROW3
D2 ENCODE1
D3 ENCODE2
D0
D1 LED1
D0
D1
D2
D3
D4 LED2
D5
D0 SWCOL1 D6
D1 SWCOL2 D7
D2 SWCOL3
D3 SWCOL4
LED3
LED4
D4 SWCOL5
D5 SWCOL6 D0
D6 SWCOL7 D1
D7 SWCOL8 D2
D3
D4
D5
D6
D7 LED5
D0
D1 L/S0 LED6
D2 L/S0
D3 L/S1
D4 L/S2
D5
D6
D7 LED7
SWCOL7
L/S1 LED8
SWCOL8
SWROW1
D0 SWROW2
D1
D2 SWROW3
D3 LED9
D4 LEDCOL3
D5
D6 L/S2 LEDCOL4
D7
LEDROW1
LED10
LED1 LEDROW2
LED2 LEDROW3
LED3
LED11
LED4
SWROW3
LED5 SWCOL5
SWROW2
LED6 SWCOL6
SWROW1 LED12
LED7 SWROW1
ENCODE1
LED8 SWROW2
ENCODE2
LED9 SWROW3
SWCOL4
D0 LED10 LEDCOL1
D1 SWCOL3
D2 LED11 LEDCOL2
D3 SWCOL2
D4 LED12 LEDROW1
D5 SWCOL1
D6 LEDROW2
D7
LEDROW3

10. Tuesday, March 28, 2000
055308A0.009 A0
RP-20 MAIN BOARD
Digitech
8760 South Sandy Parkway
Sandy, Utah 84070
B
9 9
Title
Size Document Number Rev
Date: Sheet of
VCC VDD +5V VSS
+12V
+12V
-12V -12V
+12V
-12V
VLED/Vh
+12V
+12V +12V
+12V
+12V
+12V +12V
+12V +12V
+12V
+12V
+12V
-12V -12V -12V
-12V -12V -12V
-12V
-12V
-12V
-5VA
-5VA
-5VA
+5VA
+5VA
+5VA
-12V
-12V -12V
+12V +12V +12V +12V +12V +12V +12V
+12V
-12V -12V -12V -12V -12V -12V -12V
-12V
+5V +5V +5V +5V +5V +5V +5V +5V +5V
+5V +5V +5V +5V +5V +5V +5V +5V +5V
+5V +5V +5V +5V +5V +5V +5V +5V +5V
+5V +5V +5V
+5V +5V
-12V
+5V
-12V
+12V
-5VA
+5VA
B+
B+
I1
INS704209
WA1
WA280187
1
2
WA2
WA280187
1
2
WA3
WA280187
1
2
WA4
WA280187
1
2
PA2
PA1
1
PCB1
80-5308-A
SR1
SR280058
SR2
SR280058
SR3
SR280059
SR4
SR280059
W1
W360031
1
2
C177
100S50E
C171
100S50E
C182
100S50E
C173
100S50E
C165
100S50E
C163
100S50E
C152
100S50E
D33
1N4005R
D35
1N4005R
D27
1N4005R
D37
1N4005R
D36
1N4005R
D34
1N4005R
D30
1N4005R
D29
1N4005R
D26
1N4005R
D25
1N4005R
D24
1N4005R
D23
1N4005R
D22
1N4005R
C153
100S50E
C164
100S50E
C166
100S50E
C179
100S50E
C174
100S50E
C160
100S50E
C167
100S50E
L12
FB260215R
J5
J320099
1
4
2
3
6
5
C224
.047MA3
C223
.047MA3
C229
.047MA3
L13
FB260215R
C200
470M25E
C194
470M25E
C180
470M25E
C175
470M25E
D40
1N4001R
D41
1N4001R
D39
1N4001R
D38
1N4001R
C201
470M25E
C176
470M25E
C195
470M25E
C181
470M25E
U36
7812-H
I
1
G
2
O
3
U35
7912-H
I
2
G
1
O
3
U31
79L05
I
2
G
3
O
1
C149
10ME1
C141
10ME1
C172
10ME1
C178
10ME1
C208
10ME1
U45
78L05
I
1
G
2
O
3
C192
10ME1
C216
4700ME4
U40
7805-H
I
1
G
2
O
3
D42
1N5402
R251
47 2W
C145
33S63E
C146
33S63E
R195
1M-7
R191
4.7K
C139
33S63E
C138
33S63E
C137
33S63E
SS8
SS280902
1
SS7
SS280902
1
SS6
SS280902
1
SS5
SS280902
1
SS4
SS280897
1
SS3
SS280897
1
SS2
SS280897
1
SS1
SS280897
1
S61
DIP32S
C79
.047MD7
C159
.047MD7
C122
.047MD7
C104
.047MD7
C158
.047MD7
C75
.047MD7
C40
.047MD7
C64
.047MD7
C21
.047MD7
C43
.047MD7
C2
.047MD7
C61
.047MD7
C82
.047MD7
C133
.047MD7
C112
.047MD7
C63
.047MD7
C156
.047MD7
C132
.047MD7
C1
.047MD7
C45
.047MD7
C60
.047MD7
C86
.047MD7
C87
.047MD7
C108
.047MD7
C127
.047MD7
C157
.047MD7
C111
.047MD7
C9
.047MD7
C110
.047MD7
C46
.047MD7
C7
.047MD7
C67
.047MD7
C88
.047MD7
C50
.047MD7
C6
.047MD7
C135
.047MD7
C161
.047MD7
C70
.047MD7
C117
.047MD7
C136
.047MD7
C44
.047MD7
C72
.047MD7
C27
.047MD7
C66
.047MD7
C89
.047MD7
C91
.047MD7
C118
.047MD7
C130
.047MD7
C162
.047MD7
C115
.047MD7
C11
.047MD7
C114
.047MD7
C217
.047MD7
C218
.047MD7
C210
.047MD7
C211
.047MD7
C212
.047MD7
C215
.047MD7
C214
.047MD7
C213
.047MD7
C251
.047MD7
C231
.047MD7
C230
.047MD7
C220
.047MD7
C221
.047MD7
C222
.047MD7
C241
.047MD7
C240
.047MD7
C233
.047MD7
C237
.047MD7
C209
.047MD7
C246
.047MD7
C235
.047MD7
C234
.047MD7
C248
.047MD7
C242
.047MD7
C238
.047MD7
C239
.047MD7
C247
.047MD7
C227
.047MD7
C228
.047MD7
C187
.047MD7
HS2
HS704205
1
2
3
4 R80
0-7
R81
0-7
R70
OMIT (0-7)
L3
FB260219
R214
OMIT (0-7)
R247
OMIT (0-7)
R252
OMIT (0-7)
R222
OMIT (0-7)
HS1
HS704204
H3A
HDR2
1
H3B
HDR2
2
C225
.047MD7
C249
.047MD7
C144
33S63E
D28
1N4005R

11. 055308a0
&l0 (s0P (s15H (s8V (s0S &l6D &l66P &l3E &a7L &a120M &l61FDOD Software
Page 1
RP-20 MAIN BOARD Revised: July 22, 1997
055308A0.000 Revision: A0
Bill Of Materials July 30, 1997 15:11:34
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________
1 BT1 BTC241014 24-1014 Holder For 3V Battery
1 BT2 BT241016 24-1016 3V Battery, Lithium, Eveready Part #CR2032
92 C1,C2,C4,C6,C7,C9,C11, .047MD7 62-3129 .047 uF Cap 50V 20% Cerm SMT 0805
C21,C27,C38,C40,C43,C44,
C45,C46,C48,C50,C60,C61,
C63,C64,C66,C67,C70,C72,
C75,C79,C82,C86,C87,C88,
C89,C91,C99,C104,C108,
C110,C111,C112,C114,C115,
C116,C117,C118,C122,C127,
C128,C130,C132,C133,C134,
C135,C136,C156,C157,C158,
C159,C161,C162,C187,C209,
C210,C211,C212,C213,C214,
C215,C217,C218,C220,C221,
C222,C225,C227,C228,C230,
C231,C233,C234,C235,C237,
C238,C239,C240,C241,C242,
C245,C246,C247,C248,C249,
C251
2 C3,C106 33LLME1 60-0059-01 33 uF Cap 16V 20% Elect., LL T&R
8 C5,C56,C65,C81,C103,C105, 1NPME1 60-0046-01 1.0 uF Cap 16V -20/+20% Elect., N.P. T&R
C119,C121
7 C8,C28,C186,C198,C203, 1M50E1 60-0044-01 1.0 uF Cap 50V -20/+20% Elect., T&R C&F
C204,C207
2 C10,C35 220PKD7 62-3138 220 pF Cap 50V 10% Cerm SMT 0805
9 C12,C16,C23,C24,C62,C68, .022J 56-0008 .022 uF Cap 50V 5% Poly Film 223J ammo
C123,C124,C151
18 C13,C36,C37,C49,C51,C52, 10NPME1 60-0051-01 10 uF Cap 16V -20/+20% Elect., NP T&R
C53,C57,C71,C100,C129,
C154,C168,C169,C170,C184,
C185,C193
1 C14 .39J 56-0040 .39 uF Cap 50V 5% Stacked Metal Pet 394J ammo
3 C15,C17,C19 .10J 56-0012 .10 uF Cap 50V 5% Stacked Metal Pet 104J ammo
2 C18,C20 470PK500D 62-0071 470 pF Cap 500V 10% Ceramic Disc
5 C22,C25,C69,C143,C183 .047J 56-0010 .047 uF Cap 50V 5% Stacked Metal Pet 473J ammo
4 C26,C39,C142,C155 120PKD1 62-0002 120 pF Cap 50V 10% Ceramic Disc T&R
9 C29,C30,C32,C137,C138, 33S63E 60-0324 33 uF Cap 63V Alum, Rad
C139,C144,C145,C146
10 C31,C77,C97,C141,C149, 10ME1 60-0049-01 10 uF Cap 16V -20/+20% Elect.,-D Ammo
C172,C178,C192,C208,C244
2 C33,C232 4.7ME1 60-0048-01 4.7 uF Cap 16V -20/+20% Elect., T&R
1 C34 1LLM50E1 60-0045-01 1.0 uF Cap 50V 20% Elect., LL T&R
5 C41,C188,C189,C190,C191 .47J 56-0016 .47 uF Cap 50V 5% Stacked Metal Pet 474J ammo
1 C42 2.2S50E 60-0072 2.2 uF Cap 50V -20/+80% Elect.,-S
3 C47,C58,C250 15PJD7 62-3128 15 pF Cap 50V 5% Cerm SMT 0805
2 C54,C76 .0068J 56-0005 .0068 uF Cap 50V 5% Poly Film 682J ammo
2 C55,C73 25PJD1 62-0001 25 pF Cap 50V 5% Ceramic Disc T&R
1 C59 50PJD1 62-0008 50 pF Cap 50V 5% Ceramic Disc T&R
1 C74 470PKD7 62-3133 470 pF Cap 50V 10% Cerm SMT 0805
4 C78,C80,C92,C101 .0010J 56-0000 .0010 uF Cap 50V 5% Poly Film 102J ammo
8 C83,C93,C95,C96,C109, .010J 56-0006 .010 uF Cap 50V 5% Poly Film 103J ammo

12. 055308a0
DOD Software Page
RP-20 MAIN BOARD Revised: July 22, 1997
055308A0.000 Revision: A0
Bill Of Materials July 30, 1997 15:11:34
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________
C126,C148,C150
2 C84,C94 .0027J 56-0027 .0027 uF Cap 50V 5% Poly Film 272J ammo
2 C85,C98 150PMD1 62-0031 150 pF Cap 50V 20% Ceramic Disc T&R
6 C90,C113,C120,C131,C140, 120PJD7 62-3135 120 pF Cap 50V 5% Cerm SMT 0805
C147
1 C102 47PJD7 62-3132 47 pF Cap 50V 5% Cerm SMT 0805
1 C107 .0018J 56-0026 .0018 uF Cap 50V 5% Poly Film 182J ammo
3 C125,C196,C197 .0022J 56-0002 .0022 uF Cap 50V 5% Poly Film 222J ammo
14 C152,C153,C160,C163,C164, 100S50E 60-0068 100 uF Cap 50V -20/+80% Elect
C165,C166,C167,C171,C173,
C174,C177,C179,C182
8 C175,C176,C180,C181,C194, 470M25E 60-0058 470 uF Cap 25V -20/+20% Elect
C195,C200,C201
4 C199,C202,C205,C206 .10KD7 62-3139 .10 uF Cap 50V 20% Cerm SMT 0805
1 C216 4700ME4 60-0062 4700 uF Cap 16V -20/+20% Elect-L
4 C219,C226,C236,C252 22PJD7 62-3134 22 pF Cap 50V 5% Cerm SMT 0805
3 C223,C224,C229 .047MA3 62-0067 0.047 uF Cap 50V 20% Axial Monolithic
2 D1,D8 LEDR702082 70-2082 Red Light Emitting Diode, T1 Encap, w/housing
20 D2,D3,D4,D5,D6,D7,D9,D10, 1N4148R 70-0004 1N4148 Diode Silicon Switching, 75 Volts PIV, RADIAL
D11,D12,D13,D15,D16,D17,
D18,D31,D32,D43,D44,D45
8 D14,D19,D20,D21,D38,D39, 1N4001R 70-0000 1N4001 Silicon Rectifier, 1 Amp, 50 Volts PIV, RADIAL
D40,D41
14 D22,D23,D24,D25,D26,D27, 1N4005R 70-0017 1N4005 1N4005,Silicon Rectifier, RADIAL
D28,D29,D30,D33,D34,D35,
D36,D37
1 D42 1N5402 70-0100 1N5402 Silicon Rectifier, 3Amp, 200 PIV
1 H1 PA3156 00-0000 3 Pin Pad Pattern, Not a part, .156 spacing
1 H2 PA5156 00-0000 5 Pin Pad Pattern, Not a part, .156 spacing
1 H3 HDR2 32-1069 2 Pin Header, 0.1" spacing, Cut fron 5 Pin Hdr
2 H4,H5 PA10/2MM 00-0000 10 Pin Pad Pattern, Not a part, 2MM Spacing
1 H6 PA13X2 00-0000 13X2 Pin Pad Pattern, Not a part
1 H7 HDR321083 32-1083 14 Pin Hdr, 7x2, 0.1" spacing, 0.025 pins, .375
1 HS1 HS704204 70-4204 Heatsink, 3 Regulator, Top
1 HS2 HS704205 70-4205 Heatsink, L-Shape Base
1 I1 INS704209 70-4209 Insulator, 3 Regulator Heatsink
1 J1 J320118 32-0118 1/4 Phone Jack, Hor. Mount, 1/2 Nose Thread Slimline
3 J2,J3,J4 J320119 32-0119 1/4 Phone Jack, Hor. Mount, Full Nose Thread Slimline
1 J5 J320099 32-0099 4 Pin Din JACK, Female PCB Mount, R/A Shielded U/M
2 J6,J7 J320116 32-0116 JACK, Shielded 5 pin DIN, PCB mount
1 JP1 SBRIDGE 00-0000 Jumper, solder bridge
12 L1,L2,L5,L6,L7,L8,L9,L10, FB260217 26-0217 Ferrite Bead, 2.5Kohms @70Mhz, SMT 0805
L11,L17,L18,L19
6 L3,L14,L15,L16,L20,L21 FB260219 26-0219 Ferrite Bead, 600 ohms @100Mhz, SMT 0805
1 L4 600UH-H 26-0196 600 uH Inductor
2 L12,L13 FB260215R 26-0215 Ferrite Bead, 70ohms @100Mhz, RADIAL
1 P1 100K402030 40-2030 100 K "W" 12mm, Rot Pot, 25mm D Shaft Hor
1 P2 100K402113 40-2113 100 K "D" 14mm, Rot Pot X2, 25mm D shaft horiz mt.
2 PA1,PA2 PA1 00-0000 1 Pin Pad Pattern, Not a part
1 PCB1 80-5308-A 80-5308-A RP20 Valve Main PCB, RAW
1 Q1 LPT80A-V 70-2010 Photo Transistor, Vertical (LPT80-A)
4 Q2,Q3,Q8,Q9 2N5088 70-1007 2N5088 NPN, Transistor, T&R
DOD Software Page

13. 055308a0
RP-20 MAIN BOARD Revised: July 22, 1997
055308A0.000 Revision: A0
Bill Of Materials July 30, 1997 15:11:34
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________
2 Q4,Q6 2N6714 70-1155 2N6714 NPN, Transistor
2 Q5,Q7 2N6726 70-1156 2N6726 PNP, Transistor
18 Q10,Q11,Q12,Q13,Q14,Q15, 2N4124 70-1009 2N4124 NPN, Gen. Purp. Amplifier/Switching Xstr T&R
Q16,Q17,Q18,Q19,Q20,Q21,
Q22,Q23,Q24,Q25,Q26,Q27
58 R1,R5,R15,R16,R19,R26, 10K-7 50-1503 10 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R27,R31,R33,R51,R53,R73,
R88,R90,R103,R111,R113,
R114,R117,R118,R121,R134,
R137,R138,R143,R144,R156,
R157,R168,R176,R178,R180,
R185,R188,R220,R235,R240,
R241,R243,R320,R322,R323,
R324,R326,R327,R328,R329,
R330,R331,R336,R337,R338,
R339,R340,R344,R345,R347,
R349
16 R2,R6,R14,R44,R47,R48, 1M-7 50-1506 1 MOhm Resistor 5% 1/10 Watt CF, SMT 0805
R55,R72,R74,R96,R108,
R115,R127,R128,R195,R313
3 R3,R7,R104 62K-7 50-1501 62 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
19 R4,R58,R105,R123,R140, 3.3K-7 50-1525 3.3 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R204,R255,R259,R264,R269,
R272,R276,R280,R293,R297,
R301,R305,R308,R333
9 R8,R11,R80,R81,R85,R99, 0-7 50-1531 0 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
R154,R206,R316
11 R9,R10,R21,R70,R133,R214, OMIT 00-0000 This part has been omitted
R222,C243,R247,R252,R317
23 R12,R22,R40,R61,R63,R66, 2K-7 50-1508 2 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R82,R83,R109,R124,R125,
R126,R146,R153,R171,R172,
R184,R193,R201,R205,R219,
R245,R350
26 R13,R18,R256,R257,R260, 680-7 50-1511 680 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
R261,R265,R266,R273,R274,
R277,R278,R281,R282,R283,
R285,R294,R295,R298,R299,
R302,R303,R306,R307,R309,
R312
28 R17,R20,R24,R25,R42,R56, 100K-7 50-1504 100 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R76,R100,R110,R151,R152,
R179,R187,R190,R209,R254,
R258,R263,R267,R271,R275,
R279,R287,R292,R296,R300,
R304,R334
19 R23,R28,R54,R64,R65,R75, 20K-7 50-1507 20 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R86,R91,R95,R132,R166,
R208,R221,R262,R268,R288,
R289,R290,R291
7 R29,R97,R98,R158,R167, 33K-7 50-1512 33 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R175,R181
DOD Software Page
RP-20 MAIN BOARD Revised: July 22, 1997

14. 055308a0
055308A0.000 Revision: A0
Bill Of Materials July 30, 1997 15:11:34
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________
10 R30,R41,R59,R67,R119, 470K-7 50-1523 470 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R142,R149,R155,R161,R197
11 R32,R35,R46,R69,R71,R89, 4.7K-7 50-1509 4.7 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R101,R129,R170,R321,R351
6 R34,R43,R107,R183,R186, 220K-7 50-1514 220 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R189
10 R36,R112,R116,R120,R135, 6.8K-7 50-1513 6.8 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R136,R141,R173,R194,R216
2 R37,R79 22-7 50-1532 22 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
1 R38 22M 50-0307 22 MOhm Resistor 5% 1/4 Watt Carbon Film
2 R39,R335 330-7 50-1517 330 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
18 R45,R50,R60,R62,R78,R84, 1K-7 50-1505 1 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R87,R106,R150,R164,R215,
R218,R223,R318,R319,R341,
R342,R353
2 R49,R52 330K-7 50-1519 330 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
7 R57,R122,R139,R231,R232, 51-7 50-1524 51 Ohm Resistor 5% 1/4 Watt CF, SMT 0805
R233,R234
3 R68,R93,R177 15K-7 50-1516 15 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
11 R77,R92,R102,R130,R131, 47K-7 50-1502 47 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
R174,R192,R200,R207,R213,
R225
4 R94,R145,R182,R196 22K-7 50-1522 22 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
1 R147 470-7 50-1518 470 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
16 R148,R159,R162,R169,R227, 10-7 50-1500 10 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
R228,R242,R244,R248,R250,
R253,R270,R284,R286,R325,
R354
11 R160,R163,R236,R237,R238, 100-7 50-1515 100 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
R239,R249,R314,R315,R343,
R346
1 R165 3.9M-7 50-1537 3.9 MOhm Resistor 5% 1/10 Watt CF, SMT 0805
1 R191 4.7K 50-0015 4.7 KOhm Resistor 5% 1/4 Watt Carbon Film
4 R198,R199,R202,R203 10.0K 1%-7 52-4500 10.0 KOhm Resistor 1% 1/10 Watt MF, SMT 0805
4 R210,R211,R212,R332 27K-7 50-1527 27 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
1 R217 7.5K-7 50-1521 7.5 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
8 R224,R226,R229,R230,R310, 200-7 50-1510 200 Ohm Resistor 5% 1/10 Watt CF, SMT 0805
R311,R348,R352
1 R246 39K-7 50-1528 39 KOhm Resistor 5% 1/10 Watt CF, SMT 0805
1 R251 47 2W 50-2166 47 Ohm Resistor 5% 2 Watt Carbon Film
1 RC1 RC321214 32-1214 26 Pin Ribbon Cable Conn, .1 spacing, 13X2
2 RCH1,RCH2 RCH10079 32-1221 10 Pin Ribbon Cable, Holder, 2mm spacing
1 S61 DIP32S 70-3017 32 Pin Dip Socket
2 SR1,SR2 SR280058 28-0058 Screw, 6-32 x 3/8", Pozi, Pan, Black
2 SR3,SR4 SR280059 28-0059 Screw, 6-32 x 1/4", Pozi, Pan, Black
4 SS1,SS2,SS3,SS4 SS280897 28-0897 Swage Standoff, 0.187" Round x 0.125"H, 4-40
4 SS5,SS6,SS7,SS8 SS280902 28-0902 Swage Standoff, 0.187" Round x 0.250"H, 4-40
1 TP1 TESTP 00-0000 Test point, Standard
19 U1,U2,U3,U11,U13,U14,U16, LF353/SM 72-4032 LF353M Dual Op-Amp, SMT
U18,U20,U21,U23,U24,U25,
U26,U28,U29,U30,U32,U33
2 U4,U5 ADS1286 72-1420 CONVERTER, 12-Bit Serial A to D, SMT
DOD Software Page
RP-20 MAIN BOARD Revised: July 22, 1997
055308A0.000 Revision: A0

15. 055308a0
Bill Of Materials July 30, 1997 15:11:34
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________
4 U6,U9,U10,U15 NJM4560/SM 72-4233 NJM4560 Dual Op-Amp, SMT SOIC
1 U7 THAT2252 72-4056 THAT2252 RMS Level Detector
3 U8,U19,U22 2159 72-4262 VCA,THAT 2159 (DOD & Digitech)
1 U12 4053/SM 72-0087 74HC4053 Triple 2 to 1 Analog Multiplexer, SMT
2 U17,U37 CD4052DA/S 72-0079 Dual 4-CH MUX, SOIC, SMT
2 U27,U43 LM1972/SM 72-4038 LM1972 2-Channel Audio Attenuator w/Mute, SMT
1 U31 79L05 70-4127 79L05 -5 Volt 100 mA Voltage Regulator TO-92
1 U34 LM1973A/SM 72-4036 LM1973 3-Channel 76dB Audio Attenuator w/Mute (SMT)
1 U35 7912-H 70-4017 7912 -12 Volt 1 Amp Voltage Regulator TO-220 HORIZ
1 U36 7812-H 70-4013 7812 +12 Volt 1 Amp Voltage Regulator TO-220 HORIZ
6 U38,U41,U49,U50,U58,U59 74HC574/SM 72-1263 Octal D-Type Edge Triggered Flip-Flops SMT
1 U39 LA10502 54-0351 8 Bit R-2R Ladder, 5.00 kOhm 1% Thick Film
1 U40 7805-H 70-4014 7805 +5 Volt 1 Amp Voltage Regulator TO-220 HORIZ
1 U42 CS4327 72-3020 CS4327, 20 Bit Stereo, 101dB DAC, SMT
1 U44 CS5335 72-3021 CS5335, 20 Bit Stereo, 105dB ADC, SMT
1 U45 78L05 70-4012 78L05 +5 Volt 100 mA Voltage Regulator TO-92
1 U46 TMS57070 72-3042 TMS57070 in QFP100 SPECIAL FOOTPRINT, SMT
1 U47 74HC139/SM 72-5420 Dual 2 Line to 4 Line Decoder/Demultiplexer, SMT
1 U48 74AC74/SM 72-5425 74AC74 Dual D-Type Pos Edge Trig Flip-Flop, SMT
1 U51 SDISCII_10 72-3178 SDISCII W/I's Interface in QFP100 SPECIAL FOOTPRINT, SMT
1 U52 MC34064P 70-5004 MC34064 Undervoltage Sensing Circuit
2 U53,U54 74HC244A/S 72-1111 Octal Buffer-Line Driver W/3-State Outputs SMT
1 U55 6N138 70-2139 6N138 Opto-Isolator
2 U56,U57 256KX16-70 72-1419 DRAM, 256K x 16 70ns, SOJ, SMT
1 U60 74HC04/SM 72-1086 Hex Inverter 74HC04, SMT
1 U61 72-1423-04 72-1423-04 AT49F040-12JC 4 MEG Flash EEPROM,V1.00 (RP20)
1 U62 128KX8_SRA 72-5417 128K X 8 RAM Static, SMT
1 U63 74HC86/SM 72-1404 74HC86 Quad 2-Input XOR Gate, SMT
2 U64,U65 74HC138/SM 72-5419 3 Line to 8 Line Decoder/Demultiplexer, SMT
1 U66 Z8S180/S 72-4161 CPU Z8S180 Microprocessor, 20MHz (SMT)
1 W1 W360031 36-0031 Wire, 2 End, 5.50", White, 20AWG UL/CSA
4 WA1,WA2,WA3,WA4 WA280187 28-0187-A Washer, for grounding J320119
1 X1 22.579MHZ- 76-0316 20.579 MHZ Crystal, Low Profile
1 X2 20.000MHZ- 76-0317 20.00 MHZ Crystal, Low Profile