Lincoln Electric LN-25 Service Manual page 79

WIRING DIAGRAM — CODES 9812 AND BELOW
S2
WIRE SPEED DIAL
RANGE SWITCH
HI
LO
523
N.B.
522
632
633
R1 631
10K
WIRE SPEED
CONTROL RHEOSTAT
N.B.
N.D.
ARC
VOLTMETER
OPTIONAL
+
TIMER
VM
PLUG
621
667
N.B.
621
TO WORK CLIP
BLACK
S1
POS
POLARITY
SWITCH
67
J5 A 622A
B
TRIGGER
C 500A
CONNECTOR
D
E
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted inside the machine on one of the enclosure panels.
667
N.D.,N.E.
500
530
621
607
CONTACTOR
606
P C BOARD
512
530A
624
530A 2
512 4
606 6
*
J6
607
3
530
1
500
5
*
J7
N.G.
500
S4 530B 530
S3
621
WIRE FEED
COLD INCH
MODE SWITCH
PUSHBUTTON
NEG
VV
SWITCH
667
530B 530C
N.B.
667
N.B. ,N.D. ,N.H.
N.F.
N.F.
ELECTRICAL DIAGRAMS
621 1
539 WHITE
500A 2
*
J1
667
3
541 BLACK
622A 4
N.C.
621 1
*
606 2
J2
512 3
624A 4
1 500
SOLENOID P C
2 607
BOARD PLUG
3 622
4 512
5 530A
N.D.
*
6 667
J3
7 624
500A
8
CONTROL
9 530
P C BOARD
606
10
11 621
12 622A
*
J4
512
1 2 3 4 5 6 7 8 9
555
500
CV
N.F.
67
CONTACTOR
CONTACTOR
COIL
N.D.,N.E.
*
CONNECTOR CAVITY NUMBER
J2 J1,J7
J6 J4
CAVITY NUMBERING SEQUENCE
(COMPONENT SIDE OF BOARD)
ELECTRICAL SYMBOLS PER E1537
CONTACTOR
P C BOARD PLUG
N.A.
500 N.D.
607
622
512
530A
667
ARC SOLENOID
P C BOARD
624
500A
530
606
621
606 608
512
622A
621
624A
OPTIONAL REMOTE
KIT PLUG
608
621
LEGEND
S1 POLARITY SWITCH
S2 WIRE SPEED DIAL RANGE SWITCH
S3 WIRE FEED MODE SWITCH
S4 COLD INCH SWITCH
NOTES
N.A. WHEN A CONTACTOR IS NOT USED THE
JUMPER PLUG MUST BE INSTALLED UNLESS
OPTIONAL REMOTE KIT IS BEING USED.
N.B. CONNECTIONS AS VIEWED FROM BACK OF
RHEOSTAT AND SWITCHES.
INPUT
N.C. FUSE USED ON EARLIER MODELS ONLY:
CABLE
ON G1757-2 THRU G1757-5 CONTROL P C BOARDS,
A 1 8 AMP FUSE INTERRUPTS THE 500A. /
LEAD TO THE TRIGGER SWITCH. ON THE G1757-1
P C BOARD A 5 AMP FUSE WAS USED TO INTERRUPT
THE 667 LEAD.
N.D. ITEM FACTORY INSTALLED ON SOME MODELS AND
OPTIONAL EQUIPMENT ON SOME MODELS.
N.E.
CONTACTOR CAN BE INSTALLED IN UNITS WITH A
G1757-3 (OR HIGHER PART NO.) CONTROL
P C BOARD.
N.F. WHEN A CONTACTOR IS NOT USED, THE '67' LEAD
TO THE POLARITY SWITCH COMES FROM THE
CONDUCTOR BLOCK AND THE INPUT CABLE
CONNECTS DIRECTLY TO THE CONDUCTOR BLOCK.
N.G.
JUMPER PLUG MUST BE INSTALLED UNLESS
J3
OPTIONAL TIMER IS USED.
N.H.
TOGGLE SWITCH USED ON EARLIER UNITS.
G-4
GAS
SOLENOID
VALVE
N.D.
PURGE
LN-25