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G-10
OPTION & TIMER PC BOARD SCHEMATICS
A
0
R016
6
OVER
1
5
515
D8C
584
1
R014
TIME
2
INITIATE
2
588
13
R012
12
CURRENT
3
OPTION BOARD
4
5
6
7
8
520
B1C
C001
510P
9
B3C
515
D6C
C902
500
D9C
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 avail-
able 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.
B
C
D
515
D8C
D001
583
TIME
X002
R017
OVER
4
A
D002
R015
515
500
C004
D8C
D9C
500
D003
588A
D9C
X002
R018
B
3
D004
520
500
B1C
D9C
C002
632
635
C4A
B3F
X002
X002
Q001
8
CW
CW
C
11
D
10
SPEED
X001
X001
9
A
3
9
B
4
8
5
6
Q002
510P
B3C
562
PROCEDURE
ENABLE
500
D9C
515
14
D8C
14
X001
X002
1
2
10
12
13
C003
7
7
11
500
D9C
N.C.
14
16
16
16
16
X901
X902
X903
X904
X905
12
13
C904
8
8
1
2
7
C903
8
C906
8
POWER SUPPLY DISTRIBUTION AND BYPASSING
ELECTRICAL DIAGRAMS
E
F
G
H
515
D8C
TIMER BOARD
I
X901
R901
8
A
10
INITIATE
9
1
15
9
7
1
15
9
7
515
3
6
3
Q4
Q3
Q1
Q4
Q3
Q1
Q2
C
Q2
PE
PE
D8C
13
CF
12
13
CF
0
X902
X903
4
INH
MR
10
DP4
DP2
DP4
DP2
DP3
DP1
DP3
2
14
11
5
2
14
11
VOLTS
515
515
D8C
D8C
500
D9C
S901A
S901B
MOST SIGNIFICANT DIGIT
FOR OPTION P.C. BOARD L6246-2
OR HIGHER USE M16795 SCHEMATIC
FOR COMPONENT VALUES AND
CIRCUIT CONNECTIONS.
TIMER P.C. BOARD
OPTION P.C. BOARD
C902
C001
THRU
.022/25
THRU
.022/25
C906
C004
C907
100pf/100
5.6K
R001
D901
1A, 400
R002
10K, 2W MULTI-TURN POT
1A, 400
330
D902
R003
R004
5.6K
10K, 2W MULTI-TURN POT
R901
R005
THRU
22K, 1/4W
R006
1.8K
4.7K
R915
R007
R916
1K
R008
47K
27K
R009
X901
QUAD 2-INPUT NAND GATE
R010
22K
47K
X902
R011
PROGRAMMABLE
THRU
R012
DIVIDE-BY-N
22K, 1/4W
X904
THRU
COUNTER
X905
R016
1K
R017
X906
3 DIGIT BCD THUMBWHEEL
1K
R018
SWITCH
J
K
L
M
5
X901
R916
B
4
6
D902
1
15
9
7
N.C.
6
6
3
6
Q4
Q3
Q1
C
Q2
C
PE
13
12
CF
12
0
0
1
15
9
X904
7
4
4
INH
INH
3
Q4
Q3
Q1
Q2
MR
10
MR
10
13
DP4
DP2
DP1
DP3
DP1
X905
5
2
14
11
5
INH
515
DP4
DP3
DP2
DP1
D8C
2
14
11
515
D8C
FROM
500
500
500
655
PROCEDURE
R914
D9C
D9C
D9C
PC BOARD
100 HZ TIME
S901C
BASE OUTPUT
LEAST SIGNIFICANT DIGIT
KEY TO SYMBOLS
COMMON CONNECTION TO ANALOG POWER SUPPLY
SCHEMATIC LOCATION REFERENCE
HORIZONTAL CO-ORDINATE LETTER
VERTICAL CO-ORDINATE NUMBER
2N 4125
Q001
Q002
2N 4123
SCHEMATIC IDENTIFICATION LETTER
X001
QUAD ANALOG
N.C. X905 AND C906 ARE USED ONLY ON 100 SECOND
SWITCH
TIMER BOARDS. BOARD JUMPER IS USED ON 10
X002
QUAD 2 INPUT
SECOND TIMER BOARDS.
NAND GATE
D001
UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:
THRU
1A, 400V
CAPACITORS = MFD/VOLTS
D004
RESISTORS = OHMS, 1 2 WATT
/
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT
BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGE-
ABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT
SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS
HAVING A COMMON CODE NUMBER.
ELECTRICAL SYMBOLS PER E1537
G-10
515
D8C
D901
O
OVER
500
D9C
6
C
12
0
4
MR 10
5
C907
500
D9C
NA-5
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