Lincoln Electric PRECISION TIG 275 IM702-A - Manual (Page 38)

F-1 WIRING DIAGRAM F-1
PRECISION TIG 275
RECEPT
ACLE C A
B
B
CON
TROL PC BOARD
1
0K A-B
F E D C
AT MINIMUM
D F
REMOTE
TM
AMPTRO
L
OPTI
ONAL
A
E
REMOTE
A B C D E F
+
-
G
R
G
Y
5 4 3 2 1
(S T ICK)
(AU
TO BA
L)
(RE
M O TE)
(P.
FLO
W)
(T HERM
AL
)
8
4 1 2 3 6 5
6
B
W
+
-
B
W
+
-
B
W
+
-
B
W
+
-
G
331
6 5 4 3 2 1 2 3 4 5 7 1
5 4 3 2 1 6
6
301
303
304B
30
6
302
METER
(VIEWED FROM REAR)
8 7 6 5 4 3 2 1
J23
J22
30
1
30
2
30
3
30
4
304A 306
304B
32
1
32
2
31
3
314 315 31
6
31
7
318 319 320 311 312
J8 J9
5 9 8 3 7 2 1 6 4
331
10
411 W 403 40
4
40
5
406 407 408 409 41
0
401 402
TIG OP TION PC B
(OPTIONAL)
8 7 6 5 4 3 2 1
22
0
G1 21
7
2 1
W 22
1
R 222
11 3 10 2
26
9
27
0
27
1
220B
6 5 4 3 2 1
23
3A
23
5
16 8 15 7 14 4 13 5 12 6 9 1
J11
L8
J10
J1
J5
J12
J4 J6
N.A.
8 6 2 3 4 5 7 1
J5A
N.B.
26
0
23
6
5 2 1 3
J7
PROT
ECTI
ON PCB
R12
R11
R10
G
R9 FREQ
ON TIME
DOWN SLOP
E
BACKGROUND
401D
402
403
405
406
408
409
410
401B
(PU
LS
E ON)
+
-
ADVANCED CONTROL
PANE
L
(OPTI
ONAL)
401C
401D
W
B
V
IE
W
OF
C
ONN
EC
T O
R
ON
PC
B
O
ARD
ELEC
TRICA
L S
YMBOL
S PER
E1537.
OHMS/WAT
TS
COMPONENT V
ALUE
UNITS: RESIS
TORS
:
MFD/VOLT
S
CAPACI
TORS
:
8
LAT
CH
0F
C
ONN
EC
T O R
J5
E X AM
P L E : TH
IS
IS PI
N 7
3
2
LEAD CO
LORING CODE:
B-BLACK
2
1
8
G-GREEN O-ORANGE R-RED CONN
EC
T O
R
P
IN
NU
MBE
RS
:
7 14
U-BLUE Y-YE
LLOW
W-WHITE
1
3 J5
46
0 VO
L T CONNEC
TI
ON
CONNECT S
TRAP
T
O
HIGH (H4) (AS SHOWN)
232
H4 (46
0V)
F
W209
18VAC X7
R210 201
X8
F S
X5 X2 X1
T1
78V
AC
S
204
115V
A C
X9 X1
0
20VAC
X3
H3 (23
0V)
H2 (20
8V)
X6
262
263
63.
5VAC
267 268
CR4
231A 231
11
5VAC X4
CB1 15A
232
231
F S F S
F S
CR4
233B 234
48 2
6
233
0
1
233A
C8
C9
21
4
21
3
R8
267
233A 231A
26
8
269
220B
27
1
270
220A
262 263 201 204 W209 R210
11
5VAC
ARC ST
ARTER
AS’B
LY
R5
SV1
GAS VALVE
L3
C6
T2
C7
T3
GAP SPARK L2
237
S F
R6
BYPASS/ STABI
LIZE
R
PC
BOA
RD
FAN
260 235
233A
239 238
28
4
285
23
6B
236
231D
231E
231A
231E
233A
POS
D
FRONT GANG
NEG POLARI
T Y
SWI
TCH MICRO SWI
TCH
POLARI
T Y
S2
NO
(REAR VIEW, SHOWN
X2
NC
MICRO-SWITCH
CLOSED CLOSED OPEN TO GROUND PER
C
A-C, D-E, B-F B-D, C-E, A-F, G-H
G
DC
+ REAR GANG
DC-
26 6A
S2A
26 5A
H
A
L1
AC
SWI
TCH E
F
ELEC
TRICA
L CODE
NATI
ONAL
25 3
POS
B-D, A-E, C-F, G-H IN AC POS
IT
ION)
D2
B
25 2
R7
28 6
W2 21
R2 22
271A
BACKGROUND RECTIFIER
26 5
26 6
G4 G3 G2
213 214 20
1
20
4
W209 R210 262 263 265 26
6
25
2
253
G1 G2 217 216 220 G3
22 0A
G4 218
SCR
4
D1
X1
NE G
SCR
3
POS
(+
)
SCR
1
SCR
2
25 2
(-
)
B
G4031
B
PRECI
SI
O
N T
IG
275 W
IRI
NG
DI
A
G
RA
M FOR CODE: 10806
L9 L10
L7
L6
L5
L12
L4
L13
L1
1
J3
N.
D.
N.C.
L1 (U) L2 (V)
C1
RECONNECT PANE
L
H4
H2
H1
H3
25
0
S1
POWER SWI
TCH
H1
C5 C4
CAPAC
ITORS
(O
P T IONA
L)
PO
W E R F A C T O R
C2
A
GR
OU
ND
HIGH
MID
LOW
COM
25
1
2
1
3456
89
10
7
2
13
4
5
68
9
10
7
J2 J3
2
1
3456
89
10
7
OR
N.
C.
23
0 VO
L T CONNEC
TI
ON
CONNECT S
TRAP
T
O
MID (H3) 20
8 VO
L T CONNEC
TI
ON
CONNECT S
TRAP
T
O
LOW (H2)
40 7
L1 (U) L2 (V)
FR
O
N
T
ELECTRO
DE
REAR
ELECT
RO
DE
WO
RK
TRA
NSF
OR
MER
PRIMAR
Y
THE
RM
OS
TAT
TRA
NSF
OR
MER
SECONDAR
Y
THE
RM
OS
TAT
PULSE
2-S
TEP
40 1
40 4
ON OFF
41 1
40 1A
4-S
TEP
TRIGG
ER
40 1B
R4
R1
R2
BALANCE
MINIMU
M
OUTPU
T
MAXIMU
M
OUTPU
T
MODE
REMOTE
R3
POS
T FLOW
31 9
32 2
31 6C
31 3C
31 6B
31 5
31 6
31 7
31 1
31 2
31 3
31 8
31
3B
TI
G
STICK
32 1 DISPL
AY
31 4
32 0
LOCAL
31 1A
31 6A
31 6C
31 1A
31 6A 31 6B
F
C
S
E
N.
E.
CON
TROL PANE
L (VIEWED FROM R
EAR)
33 2
33 3
B
W
33 4
33 5
B W
332
B W
333
B W
334
B W
335
B W
12 11 10 9 8 6 5 4 3 1 2 7
12 11 10 9 8 6 5 4 3 1 2 7
6 4
10 9
216 218
C1
,C
2
P O W
E R
FA
CT
O R C
A P A CI
T O R S , 5
0 /4
6 0 ( O P T IO
NA
L )
C4
,C
5
BY-
PASS
CAPA
CI
T O
R S , .
0 0 4 7
C6
HI
GH
V
O L T AG
E CAP
ACI
T O R,
. 0 0 1 5 /1
2 k V
C 7
P H A S E S
H IF
T C
A P A C IT
O
R ,
15uF
/2 50V
A C
C 8 ,C
9
H IGH
F
R E Q P
R OT
E C T ION
C
A P A C IT
O
R S , .2
2/400
CB
1
C IR
C U
IT
BR
EAKE
R,
1
5 AM
P
CR
4
1 2 V DC RE
L A Y CO
IL
D1
F R
EE W
H EEL
IN
G
D
IO
D E
D2
BAC
KGRO
UND D
IODE
L 1
OUT
P U T INDUC
T O
R ( C HOK
E )
L 2 ,L 3
H IG
H
F
R EQ
IN
DU
CT
O
R S
L 4 - L 1 3
RF
T
O ROI
D CH
OKES
R1
OUT
PUT
CONT
ROL
PO
T E N
T IO
M
E T E R,
1
0 K
R2
BAL
AN
CE CO
NT
R O
L POT
ENT
IO
M E T E R , 1
0 K
R3
POS
T F
L OW
POT
E N T IOM
E T E R , 10
K
R4
M IN
OUT
P U
T P
O T E NT
IO
M E T E R, 10
K
R 5
P H A S E S
H IF
T R
E S IS
T OR
, 200/1
00
R6
HOLDIN
G RES
IS
T O
R , 5
0 /225
R7
RES
IS
T O R , 2
0 /1 0 0
R8
RES
IS
T O R , 5
/5
0
R9
F R
EQ C
O
NT
ROL
POT
ENT
IO
M
E T E R,
1
0 K
R1
0
O N T
IM
E C
O NT
ROL
PO
T E NT
IO
M
E T E R,
1
0 K
R1
1
BAC
KGRO
UND P
O T E NT
IO
M E T E R,
1
0 K
R1
2
D OW
N SL
OPE
P
O
T E NT
IO
M
E T E R,
1
0 K
S1
IN
PU
T PO
W
E R SW
IT
CH
S2
PO
L A R
IT
Y SW
IT
C H
S2
A
M IC
RO
S W
IT
CH
O
N PO
L A R
IT
Y SW
IT
C H
S C R 1 ,2 ,3,4
MA
IN
P
O W
E R S
C R
’S
SV
1
G AS
SO
L E NO
ID
VAL
VE
, 1
1 5 VAC
SV
2
W
AT
ER SO
L E NO
ID
V
A L VE,
1
1 5 V AC (
O
PT
IO
NA
L )
T 1
M A IN
T
R ANSF
O R M
E R
T 2
HI
G H
V
O L T AG
E
T R ANSF
O
R M E
R
T 3
HI
G H
F
R EQ
T
R
ANSF
O
R M
E R
N.
A.
CO
NN
ECT
ION
IS
P
IN
TO
P
IN
B
ET
W
EE
N
J23
AN
D J5
.
N.
B.
RO
BOT
IC
INT
ERF
AC
E CO
NN
ECT
ION
.
N.
C.
R
EMO
VE
JUM
PER
PL
UG
IN
J3
W
HE
N
IN
ST
ALL
ING
TI
G
OP
TI
ON
P
C
BO
AR
D.
N.
D.
D
ISC
ONN
ECT
JUM
PER
L
EAD
B
ET
W
EE
N
PI
N 1
AN
D
PI
N
2
IN
J3
TO
DO
UB
LE
PR
EFLO
W
&
PO
STFLO
W
T
IME
S.
N.
E.
D
IS
PL
AY
TOGGL
E
SH
OW
N
IN
MI
N
AM
P PO
SI
TI
ON
.
N.F
. PL
UG
S
INTO
LO
W
ER
S
W
ITC
HE
D
RE
CE
PT
AC
LE
.
SV2
WAT
ER VA
LVE
(OPTI
ONAL)
N.F.
31
3A
NOTE: This diagram is for r
efer
ence only
. It may not be accurate for all machines cover
ed by this manual. The specific diag
ram for a particular code is pasted
inside the machine on one of the enclosur
e panels. If the diagram is illegible, write to the Service Department for a r
eplacem
ent. Give the equipment code number
..
ENHANCED DIAGRAMS