Lincoln Electric SVM118-A Welder User Manual


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G-8
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 355
Control PC Board
(G2512) Schematic
G-8
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not
available from Lincoln Electric. This information is provided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result
in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.
CHK.
A475-1BB
50V
0.1
C118
50V
0.1
C129
54HC74
X39
7
14
NAND
X38
14
7
50V
0.1
C124
50V
0.1
C126
74HC373
X42
20
10
74HC373
X40
20
10
50V
0.1
C105
50V
0.1
C131
NUMBER.
CANADA
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
50V
0.1
C106
CLEVELAND, OHIO U.S.A.
Ch'ge.Sht.No.
DB/MW
MATERIAL TOLERANCE ("t") TO AGREE
ON ALL ANGLES IS + .5 OF A DEGREE
THE LINCOLN ELECTRIC CO.
ELECTRICAL SYMBOLS PER E1537
GENERAL INFORMATION
74HC373
NONE
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLES SIZES PER E-2056
FRANCE
9/24/90
DR.
DATE
SCALE
ON 2 PLACE DECIMALS IS + .O2
ON 3 PLACE DECIMALS IS + .OO2
CAPACITORS =
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
AUSTRALIA
74AC138
X37
16
8
74AC373
X36
20
10
50V
0.1
C107
74AC139
X35
16
8
50V
0.1
C109
54HC74
X41
7
14
74AC04
X34
14
7
+
REF
-
TL431
X33
1
6
8
50V
0.1
C34
50V
0.1
C35
33074A
X31
4
11
33074A
X29
4
11
50V
0.1
C28
2.43K
R59
50V
0.1
C36
50V
0.1
C29
50V
0.1
C31
500
CW
R137
LM224
X26
4
11
681
R56
150
50V
C39
150
50V
C37
4.7
35V
C40
4.7
35V
C38
4.7
35V
C66
681
R150
J13
4
J13
3
50V
0.1
C27
33074A
X28
4
11
50V
0.1
C26
OP27
X27
7
4
50V
0.1
C32
1.82K
R57
+15V
VREF
-15V
Adjust
Voltage
Reference
475
A
50V
0.1
C33
POT GND
1.00K
R146
10K
R36
1K
CW
R129
+5V
CLKOUT
9.09K
R38
+5V
VREF
D16
+5V
Calibration
Gain
Rectifier
Adjust
Balance
Current
2/4 STEP
SHIFT
REGISTER
A/D
LATCH
20
10
O CTRL
3D
6Q
7Q
1D
8Q
5Q
4Q
3Q
2Q
1Q
Vcc
GND
G
7D
5D
6D
2D
4D
8D
54HC373
X40
8
13
2
5
9
15
18
12
1
19
7
14
11
16
17
3
6
4
4.75K
R41
X29
7
5
6
CW
500
R144
X29
1
3
2
D17
4.75K
R43
50V
0.1
C1
20
10
/OFLW
D2
REF+
AG IN
D6
REF-
D7/RD
TLC0820AI
/CS
D4
D5
NC
MODE
GND
D0
Vcc
D3
D1
/WR
/INT
X16
19
7
2
3
5
15
8
14
9
17
18
6
12
16
13
1
4
11
J10
2
100
R135
CURRENT FB+
CURRENT TEST
To Shunt
50V
2700p
C50
+15V
D14
100
R136
50V
0.1
C69
CURRENT FB-
D15
TP1
10
10K
R149
J8
1
1.00K
R34
-15V
+15V
D97
100
R160
J11
11
D93
D92
100K
R155
+5V
+15V
-15V
VREF
VREF
X31
7
5
6
267
R142
D8
C47
10K
R16
D95
C48
150K
R48
X29
8
9
10
22.1K
R25
D9
X28
7
5
6
D19
D18
4.75K
R17
X31
8
9
10
CW
500
R132
600V
.02
C71
1.50K
R22
D6
4.75K
R18
CUR_GAIN
4.75K
R21
D10
51.1K
R148
X31
14
13
12
30.1K
R26
X31
1
3
2
4.75K
R28
10K
R24
10K
R19
X32
13
12
D12
D11
D5
D7
1.00K
R158
VREF
10K
R23
10K
R20
10K
R15
10K
R156
D20
50V
150p
C74
D87
POWER SUPPLY
CNY17-3
OCI4
42
1
6
5
4.75K
R126
16.2K
R91
681K
R54
475
R138
50V
150p
C73
1.50K
R50
1.00K
R139
CNY17-3
OCI1
42
1
6
5
475
R49
475
R55
D21
1.00K
R52
J9
1
475
R140
D88
J9
8
18
15V
C72
+5V
C46
D24
10K
R53
D22
18
15V
C51
4.75K
R31
51.1K
R37
10K
CW
R128
10K
R39
681K
R27
D89
10K
R10
1.50K
R117
J8
2
C62
V
V
INPUT
CC
EE
NC
OUT
INPUT
NULL
4
NULL
7
OP27
X27
2
8
3
6
5
1
AMPTROL INTERFACE
1K
R40
.33
50V
C42
10K
R116
D23
J9
2
POT INTERFACE
START CURRENT
PEAK CURRENT
AFTERFLOW
SPOT TIME
AC BALANCE
STICK FORCE
PREFLOW
LATCH
BIT I/O
AC MODE
START TIME
J10
4
D67
100
R89
D49
D34
J10
3
D36
D45
D44
100
R88
4.75K
R131
10K
R112
J10
5
100
R113
D48
J10
14
100
R82
100
R99
100
R105
D60
10K
R98
10K
R104
D66
D74
D75
D47
D62
D58
D37
D33
D32
D39
J10
13
100
R84
100
R81
100
R101
D59
100
R97
D63
10K
R96
J10
10
D40
J10
15
D79
D41
100
R85
D42
100
R109
10K
R108
D70
D71
100
R86
20
10
O CTRL
3D
6Q
7Q
1D
8Q
5Q
4Q
3Q
2Q
1Q
Vcc
GND
G
7D
5D
6D
2D
4D
8D
54HC373
X11
13
14
2
5
9
15
11
12
1
19
8
17
7
16
18
4
6
3
D50
J10
6
CLKOUT
DATA[15]
DATA[7]
DATA[5]
HARD_RST
ADDRESS[5]
ADDRESS[0]
ADDRESS[9]
+5V
ADDRESS[3]
14
28
A4
A12
A7
A3
A5D5
Vcc
D3
A6
D4
D1
D2 A2
D0
Vpp
A0
A1
D6
D7
NC
/PGM
/CE
/DE
GND
A11
A10
A9
A8
27C64-90
X6
10
4
13
17
16
1
11
9
5
6
12
25
3
7
8
15
24
19
26
27
22
18
20
2
23
21
100V
10p
C64
EPROM
X34
1
2
10
30
/MEN
A5
A8
Vss
A9
A10
A1
A11
/WE
/BIO
A3
/DEN
MC
A7
A0
A6
A4
/INT
/RS
A2
D15
X1
X2
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
Vcc
D10
D11
D12
D13
D14
CLKOUT
TMS320C10A
X4
34
3
23
22
12
20
14
40
19
35
37
28
24
33
29
2
1
39
38
36
26
13
25
11
21
6
27
32
31
9
5
4
15
16
17
18
7
8
10K
R121
"Voltage below trip point"->
TESTCODE
*
uP
A/D EOC* ->
"MEMORY ENABLE"
(X2,21,36)
(X10,15,37)
EPROM
ADDRESS[0]
40
19.6608MHz
Y1
1
2
100V
10p
C63
TP1
4
ADDRESS[11]
ADDRESS[10]
ADDRESS[8]
ADDRESS[0:11]
ADDRESS[7]
ADDRESS[6]
ADDRESS[5]
ADDRESS[1]
ADDRESS[2]
ADDRESS[3]
ADDRESS[4]
ADDRESS[9]
C59
14
28
A4
A12
A7
A3
A5D5
Vcc
D3
A6
D4
D1
D2 A2
D0
Vpp
A0
A1
D6
D7
NC
/PGM
/CE
/DE
GND
A11
A10
A9
A8
27C64-90
X5
10
4
13
17
16
1
11
9
5
6
12
25
3
7
8
15
24
19
26
27
22
18
20
2
23
21
+15V
OVER_VOLT
CUR_GAIN
CLKOUT*
DATA[0]
DATA[1]
DATA[3]
DATA[2]
DATA[0:15]
*
BACKGND GND
BACKGND CMD
COUNTER
RIPPLE
(X30 Current FB)
SCR CLN
(To Opto-triac
POWERDOWN
Interlock Circuit)
CLN
51.2 KHZ 20%
SCR/BACKGND CNTRL
*
SCR GND
PEN
(Voltage FB)
J14
5
1K
R76
40V
600mA
Q5
J14
1
50V
2700p
C57
1.50K
R70
DATA[4]
DATA[6]
DATA[7]
DATA[5]
50V
2700p
C54
8
16
CLK Bb
54HC390
CLK Aa
QDb
QBb
GND
Vcc
QCa
QCbQDa
CLK Ba
QBa
QAb
QAa
RSTa
CLK Ab
RSTb
X2
4
7
6
1
2
15
11
12
3
9
10
13
14
5
267
R69
C55
10K
R68
267
R64
10K
R75
40V
600mA
Q7
C61
X3
5
6
4
X3
1
3
2
47.5K
R78
D31
CNY17-3
OCI3
42
1
6
5
1.50K
R65
J14
4
J14
2
X26
7
6
5
681K
R79
10K
R80
150V
8A
Q6
J14
3
D13
1W
680
R32
40V
600mA
Q4
X32
1
2
10K
R133
4.75K
R33
SCR PEN
POWER SUPPLY SOURCE POINT
LABELS
EARTH GROUND CONNECTION
D-
COMMON CONNECTION
FRAME CONNECTION
VOLTAGE NET
SUPPLY
X34
3
4
DISPLAY GND
DISPLAY DATA
DISPLAY CLK
475
A
_
R-
C-
MFD
RESISTORS = Ohms (
1A, 400V
(
DIODES =
1/4W
.022/50V
NC
NC
NC
SHT.
NO.
TYPE
SUBJECT
EQUIP.
162
97
SUP'S'D'G.
WITH PUBLISHED STANDARDS
SCHEMATIC
CONTROL
UNLESS OTHERWISE SPECIFIED)
132
LAST NO. USED
_
_
X38
12
11
13
X20
12
11
13
100
R120
J14
6
J12
8
3.01K
R8
3.01K
R66
J13
9
3.01K
R9
3.01K
R67
J14
7
40V
600mA
Q9
4.75K
R73
X20
9
8
10
4.75K
R14
J12
10
50V
0.1
C25
J12
5
40V
600mA
Q11
1W
680
R13
27
10V
C65
TP1
8
100
R119
4.75K
R7
WATCHDOG
Q
/Q
CLK
RST
SET
/K
J
X24
13
11
10
14
15
12
9
"Interrupt uP" X4pin5
8
16
Q3
54HC259
DTIN
Q6
Q4
GND
Vcc
RST
Q5Q7
A2
EN
Q2
A1
A0 Q0
Q1
X13
3
12
15
13
1
4
9
7
2
11
10
6
5
14
Q
/Q
CLK
RST
SET
/K
J
X24
3
1
6
2
5
4
7
TP1
6
X20
2
3
1
X32
11
10
+5V
HARD_RST
INT
HARD_RST
HARD_RST
+5V
"Multiple Watchdog Resets"
DISABLE
*
X23
2
3
1
TP1
7
J12
12
I3
I1
I0
O0
O3
O2
O1
MC1413BP
O6
O4
I6
GND
I4
O5
I5
I2
CLAMP
X25
4
7
6
1
2
15
11
12
3
9
10
13
14
5
16
8
J12
6
40V
600mA
Q3
40V
600mA
Q2
J12
7
J13
8
4.75K
R12
J12
9
J12
11
4.7
35V
C68
J11
14
1.00K
R162
4.75K
R161
1W
680
R11
X34
11
10
V
CC
8
16
C
R
Q12
Q6
Q5
Q7
Q4
Q3
Q2
Q1
Q11
Q10
Q8
Q9
GND
74HC4040
X7
4
7
6
1
2
15
11
12
3
9
10
13
14
5
40V
600mA
Q1
54HC4066
X30
14
7
54HC08
X23
14
7
54HC00
X20
14
7
50V
0.1
C121
27C64-90
X5
28
14
50V
0.1
C123
50V
0.1
C117
54HC08
X3
14
7
54HC390
X2
16
8
54HC109
X24
16
8
74HC165
X21
16
8
+5V
+5V
50V
0.1
C122
74HC373
X12
20
10
50V
0.1
C128
50V
0.1
C110
50V
0.1
C101
50V
0.1
C119
50V
0.1
C120
74HC4040
X10
16
8
50V
0.1
C127
74HC165
X22
16
8
50V
0.1
C100
54HC259
X13
16
8
50V
0.1
C104
74HC165
X15
16
8
27C64-90
X6
28
14
50V
0.1
C111
74HC4040
X7
16
8
50V
0.1
C102
5320C10A
X4
30
10
50V
0.1
C103
74HC373
X11
20
10
54HC259
X14
16
8
74HC04
X32
14
7
50V
0.1
C125
50V
0.1
C112
50V
0.1
C108
D86
+15V
243
R62
D25
1.00M
R46
+
t
56
PTC1
D84
40V
600mA
Q10
.1
50V
C56
10K
R123
D26
Vout=10.2V
267
R125
600V
.02
C52
4.75K
R60
4.75K
R63
X29
12
14
13
J9
7
3.32K
R58
X26
8
9
10
47.5K
R124
+
t
56
PTC2
4.75K
R127
+15V
VREF
+15V
+15V
-15V
VREF
REMOTE LOW
REM CUR
A=2.43
Offset
Adjust
REMOTE HI
REMOTE TAP
D28
D27
600V
.02
C53
J9
6
J9
5
D85
332
R61
3.01K
R152
X32
9
8
C58
150V
8A
Q8
"Missed Watchdog Reset*"
D_TIMER*
"25us Timeout" ->
10K
R71
7
14
/Q1
CLOCK 1
SET 1
RESET 1
Q1
54HC74
RESET 2
N.C.
DATA 1
DATA 2
GND
Q2
CLOCK 2
VCC
SET 2
X39
10
1
11
4
2
3
6
9
13
12
5
8
CLK1
H
H
SA
CLK2
SS/PL
H
Q
F
Q
E
D
C
B
A
G
74HC165
X22
9
14
12
11
1
7
2
15
10
6
13
3
4
5
X34
98
X38
4
6
5
X38
9
8
10
X28
14
12
13
NC
NC
NC
V
CC
8
16
C
R
Q12
Q6
Q5
Q7
Q4
Q3
Q2
Q1
Q11
Q10
Q8
Q9
GND
74HC4040
X10
4
7
6
1
2
15
11
12
3
9
10
13
14
5
COUNTER
RIPPLE
SQUARE WAVE 355
FAULT DETECT
TIMER
HARD_RST
CLKOUT
J12
2
+15V
50V
0.1
C116
+5V
J12
3
J13
10
HARD_RST
+15V
50V
0.1
C114
Q
/Q
CLK
RST
SET
/K
J
X19
13
15
10
14
11
12
9
X34
5
6
10K
R72
TP1
5
X20
5
6
4
+5V
+5V
J12
4
NC
(UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
NC
54HC109
X19
16
8
50V
0.1
C113
X34
13
12
50V
0.1
C115
TLC0820AI
X16
20
10
50V
0.1
C130
54HC4351
X17
20
10
54HC4351
X18
20
10
4.7
35V
C67
X23
10
8
9
ADDRESS[4]
ADDRESS[5]
ADDRESS[8]
ADDRESS[4]
DATA[9]
ADDRESS[10]
ADDRESS[6]
ADDRESS[7]
DATA[5]
DATA[6]
DATA[4]
DATA[6]
DATA[3]
DATA[7]
DATA[8]
DATA[2]
DATA[3]
ADDRESS[3]
DATA[2]
DATA[1]
DATA[0]
DATA[0]
DATA[1]
+5V
ADDRESS[0]
ADDRESS[1]
ADDRESS[2]
ADDRESS[0]
ADDRESS[1]
ADDRESS[11]
ADDRESS[10]
ADDRESS[9]
ADDRESS[8]
DATA[10]
ADDRESS[7]
ADDRESS[6]
ADDRESS[2]
ADDRESS[1]
ADDRESS[2]
ADDRESS[0:11]
ADDRESS[11]
DATA[12]
DATA[13]
DATA[4]
+5V
DATA[14]
DATA[11]
+5V
CLKOUT*
HARD_RST
X13,14,24,4,39,41)
(X20 pins 2,5,10,13;
CLK1
H
H
SA
CLK2
SS/PL
H
Q
F
Q
E
D
C
B
A
G
74HC165
X21
9
14
12
11
1
7
2
15
10
6
13
3
4
5
X23
4
6
5
"Software Error Detected"->
SOFT ERR*
IOWR2*
MAIN PROCESSOR
IOWR3*
D72
DATA[14]
DATA[13]
J10
11
CRATER CURRENT
TP1
3
POT REF
100
R118
DATA[15]
+5V
10K
R114
+5V
D57
D35
+5V
J10
9
J10
12
100
R95
D55
D56
VREF
100
R83
D38
VREF
20
10
O CTRL
3D
6Q
7Q
1D
8Q
5Q
4Q
3Q
2Q
1Q
Vcc
GND
G
7D
5D
6D
2D
4D
8D
54HC373
X12
7
8
2
5
9
15
18
12
1
19
4
14
11
16
17
13
6
3
ARC START *
IP2 B15
IP2 B14
CRATER FADE
VREF
VREF
LATCH
PULSE %
D77
100
R107
D43
100
R90
D46
100
R87
J10
1
10K
R110
D76
100
R111
D73
TP1
2
100
R115
D69
VREF
X28
8
9
10
1.00K
R157
ANALOG
NC
NC
SWITCH
Logic 0 / A=16
CURRENT/VOLTAGE FEEDBACK
VOLTAGE FB
(Electrode
Terminal)
"DATA ENABLE" ->
"WRITE ENABLE" ->
*
*
Calibration
FB Voltage
(X14 pin12)
1 / A=1
FB VOLTS
<-FULL RANGE CURRENT
FB CURRENT->
8
16
C
G1
B
/G2A
74AC138
/Y5
/Y3
/Y7
A
/G2B
/Y6
/Y2
/Y4
/Y1
GND
Vcc
/YO
X37
2
1
3
4
5
6
7
10
9
11
15
12
14
13
NC
NC
NC
NC
IOWR1*
A/D EOC*
<-
NC
BITS IN*
NC
NC
NC
LWE*
8
16
Y2a
Y0b
74AC139
Y1a
A0a
select a
A1b
VCC
select b
GND
Y3a
Y1b
A0b
Y2b
A1a
Y0a
Y3b
X35
13
14
15
3
6
1
2
7
5
12
11
10
9
4
CLKOUT
CLKOUT*
D94
7
14
XB
GND
YB
Actrl
YA
XD
XC
XA
Vcc
Bctrl
Dctrl
Cctrl
YC
YD
54HC4066
X30
11
13
1
4
3
12
5
8
2
10
9
6
20
10
G
1D
6D
5D
O CTRL
5Q
6Q
7Q
7D
8D
8Q
Vcc
GND
4Q
3D
2Q
3Q
1Q
2D
4D
74AC373
X36
13
14
2
5
9
15
11
12
1
19
8
17
3
16
18
4
6
7
AUTO BALANCE
LED
*
24 VAC Input
SWITCH COMMON
24 VAC Input
ARC START
DC MODE
HI FREQ ON
GAS ON
*
1 OF 8
AC RELAY
BIT I/O
*
LED/DISPLAY INTERFACE
AC MODE
STICK
OCV BOOST
*
DC RELAY
START
10K
R51
DECODE
OP3 B7
LED
DRIVER
NC
LED SET *
ANALOG
MUX
J11
9
J11
5
J12
1
J11
13
*
DIPLAY VCC
*
*
*
CRATER
*
LED POWER
GASWAT
ARC
PEAK
HI FREQ
*
*
BACKGND
10K
R100
J11
3
J11
1
20
10
X3
NC
X2
X1
A
X0
B
Vee
54HC4351
X7
EN1
EN2
X4
X5
GND
X
Vcc
LTEN
NC
X6
C
X17
1
6
4
3
11
8
9
7
12
13
16
2
19
15
5
18
14
17
X3
9
8
10
20
10
O CTRL
3D
6Q
7Q
1D
8Q
5Q
4Q
3Q
2Q
1Q
Vcc
GND
G
7D
5D
6D
2D
4D
8D
54HC373
X42
13
14
2
5
9
15
11
12
1
19
8
17
3
16
18
4
6
7
X32
3
4
J11
7
Q
/Q
CLK
RST
SET
/K
J
X19
3
1
6
2
5
4
7
+5V
J9
3
X38
1
3
2
X3
12
11
13
4.75K
R1
TRIP POINT
POWERFAIL* ->
+8.8V
+8.4V
7805
C132
D2
10K
R2
J13
7
J13
6
.33
50V
C45
X26
14
13
12
D90
100K
R141
D81
D80
D82
4.7
35V
C44
D83
X26
1
3
2
10K
R122
D4
10K
R5
10K
R3
D3
10K
R6
4.75K
R4
D1
-15V
-15V
VREF
+15V
+5V
VREF
+5V
AC SYNC->
4.20V
J13
2
GND
IN
OUT
S18104-2HS
X1
1
2
3
J13
5
D29
J13
1
150
50V
C43
-UNREG
+UNREG
P_GND
20
10
X3
NC
X0
X1
A
X2
B
Vee
54HC4351
X7
EN1
EN2
X4
X5
GND
X
Vcc
LTEN
NC
X6
C
X18
16
1
4
3
11
8
5
7
12
13
19
6
9
15
2
17
14
18
PULSE
D52
SHOW VOLTS
SWITCH GND
X24pin7 (Fault Detect)
4.75K
R42
A/D INTERFACE
100
R93
1K
CW
R154
J10
7
J11
12
CRATER
J10
8
3.01K
R153
D53
X32
5
6
D51
100
R103
J11
8
10K
R106
D68
D96
10K
R159
10K
R102
D64
100
R94
HF CONTINUOUS
D54
J11
6
J11
4
D61
(Powerdown Circuit)
+5V
D78
+15V
OVER_VOLT
D65
68.1K
R30
"Select Channel and Convert"
TP1
9
18
15V
C49
10K
R130
X28
1
3
2
100
R74
D91
BACKGROUND
INT
HARD_RST
100
R134
10K
R29
J11
10
10K
R35
475
R151
CLK1
H
H
SA
CLK2
SS/PL
H
Q
F
Q
E
D
C
B
A
G
74HC165
X15
9
14
12
11
1
7
2
15
10
6
13
3
4
5
CUR
SPOT
START
SHOW START CUR
DATA[9]
DATA[10]
DATA[12]
DATA[11]
DATA[8]
REMOTE
HF OFF
STICK
ARC START *
SWITCH INTERFACE
AC MODE
"Watchdog Reset ->"
IP0_STB*
A/D READ* ->
DATA_RD1
BITS OUT *
LED SET *
A/D SET *
SOFT WATCH *
+5V
+5V
VREF
VREF
PULSE FREQUENCY
60Hz 34 sec
"50 or 60 Hz"->
50Hz 41 sec
Reset Error Counter
AC SYNC
RESET FREQUENCY
X23
13
11
12
CLKOUT*
DATA[14]
DATA[13]
DATA[11]
DATA[10]
DATA[9]
DATA[15]
DATA[0:15]
DATA[12]
DATA[8]
+5V
HARD_RST
CLKOUT
HARD_RST
DATA[0]
DATA[3]
HARD_RST
DATA[2]
DATA[1]
HARD_RST
+5V
CLKOUT
DATA[0]
DATA[4]
DATA[3]
DATA[5]
DATA[6]
DATA[7]
DATA[0]
DATA[1]
DATA[2]
DATA[2]
DATA[1]
OP2 B8
1 OF 8
DECODE
8
16
Q3
54HC259
DTIN
Q6
Q4GND
Vcc
RST
Q5Q7
A2
EN
Q2
A1
A0 Q0
Q1
X14
3
12
15
13
1
4
11
5
2
9
10
7
6
14
7
14
/Q1
CLOCK 1
SET 1
RESET 1
Q1
54HC74
RESET 2
N.C.
DATA 1
DATA 2
GND
Q2
CLOCK 2
VCC
SET 2
X41
10
1
11
4
2
3
6
9
13
12
5
8
BITS OUT *
NC
+5V
DATA[1]
100
R92
J11
2
MUX
ANALOG
DATA[3]
DATA[2]
+5V
VREF
VREF
VREF
VREF
DATA[4]
DATA[7]
DATA[6]
DATA[0]
DATA[5]
VREF
VREF
VREF
VREF
+5V
+5V
+5V
-15V
+5V
+5V
+5V
5-8-92E
6-11-93H
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