Lincoln Electric PRECISION TIG 375 IM703-A - Manual (Page 40)

F-3 WIRING DIAGRAM F-3
PRECISION TIG 375
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
.
RECEP
T ACLE C A
B
B
CON
TROL PC
B
OAR
D
1
0K A-B
F E D C
A T MINIMUM
D F
A
E
REMOT
E
A B C D E F
R4
R1
R2
BALANCE
MINIMUM OUTPUT
MAXIMUM OUTPUT
MODE
REMOT
E
R3
POST FLOW
319
5 4 3 2 1
322
316C
313C
316B
315
316
317
311
312
313
318
31
3A
313B
TI
G
S TICK
8
4 1 2 3 6 5
6
321
12 11 10 9 8 6 5 4 3 1 2 6 5 4 3 2 1 2 3 4 5 7 1
5 4 3 2 1 6
6
301
303
304B
306
302
METER
(VIEWED FROM RE
AR)
DISPL
AY
314
320
LOCA
L
311A
316A
8 7 6 5 4 3 2 1
J23
J22
7
316C
30
1
30
2
30
3
30
4
304A 306
304B
32
1
32
2
31
3
314 315 31
6
317 318 319 320 311 312
J8 J9
2 1
W 22
1
R 22
2
11 3 10 2
269 270 271 220B
6 5 4 3 2 1
233A 235
16 8 15 7 14 4 13 5 12 6 9 1
J11
L8
J5
J12
J6
N.A.
8 6 2 3 4 5 7 1
J5A
N.B.
255
256
256 260 255 236
PRO
T ECTION PCB
R1
2
R1
1
R10
R9
FREQ
ON T
IME
DOWN SLO
PE
BACKGROUND
401D
PULS
E
2-ST
EP 402
403
405
406
401
408
409
410
401B
407
ADVANCED CON
TROL PANEL
404
ON OFF
401C
411
401A
401D
V
IE
W
OF
C
ONN
EC
T
O R
ON
PC
B
O
ARD
ELEC
TRICA
L SYMBO
LS PER E
1537.
OHMS/WAT
T S
COMPONENT
VALUE
UNITS
:
RESIS
TORS:
MFD/VOL
T S
CAPACI
TORS:
8
LAT
CH
0F
C
ONN
EC
T O
R
J
5
E X
AM
P
L E
: TH
IS
IS
P
IN
7
3
2
LEAD C
OLORING
CODE:
B-BLAC
K 2
1
8
G-GREEN O-ORANGE R-RED CON
NEC
T O
R
P
IN
N
U M
B
ER
S :
7 14
U-BLUE Y-YE
LLOW
W-WHITE
1
3 J5
C1
RECONNECT PANE
L
H4
H2
H3
H1
CAPAC
IT ORS
PO
WER
FA
C T OR
C2
HIGH
MID
LOW
COM
251
F
W20
9
18
VAC
X7
R210 201
X8
F S
X5 X2 X1
T1
78
VAC
S
204
115V
A C
X9 X1
0
20
VAC
X3 X6
262
263
63.5VAC
267 26
8
CR4
231A 23
1
115VAC
X4
CB1 15A 23
2
231
S F S
F S
CR4
23
3B 234
48 2
6
233
0
1
233A
X13
223
231B
C8
C9
R8
267
233A 23
1A
268
269
220B
271 270
220A
262 263 20
1
204 W20
9
220C
231B
115VAC
ARC S
T ARTER AS
’BLY
R5
SV1
GAS VALVE
L3
C6
T2
C7
T3
GAP
SPARK L2
237
S F
R6
BYPASS
/
ST
AB
ILIZE
R
PC
B
OAR
D
FAN
260
235
233A
239 23 8
284
285
236B
236
231D
231E
5
8
CR3 CR2
25
8 257
CR3 CR2
231C
3
9
B
A
B
A
FAN
231A
231E
231B
233A
255
256
CR3CR3
CR3
220C
AC BOO
S T
DC BOOS
T
3
9
260A
231F
R13
HI-FREQ INTENSI
T
Y
238A
240
POS
D
FRONT G
ANG
NEG POLARI
T Y SW
ITCH
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
S2
A
26 5A
H
A
L1
AC
SWI
TCH E
F
ELEC
TRICA
L CODE
NATIONAL
25 3
POS
B-D, A-E, C-F, G-H IN AC P
OSITI
ON)
D2
B
25 2
R7
28 6
W2 21
R2 22
271A
22 8
22 8
BACKGROUND RECTIFI
ER
26 5
26 6
47
5
8
7 4
R14
22 3
22 4
22
6
225
227 CR2
CR3
225A
22 8
227A
OCV BO
OST
RECTIFI
ER
21
3
214 201 204 W20
9
R210 26
2
263 265 266 252 253
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
22 4
G4047-2
A
N.
A.
CO
NN
ECT
ION
IS
P
IN
TO
PI
N B
ET
W
EE
N J
23
AN
D
J5
.
N.
B.
RO
BOTI
C
INT
ERF
AC
E CO
NN
ECT
ION
.
N.
C.
D
IS
PL
AY
TOGGL
E
SHO
W
N
IN
MI
N
AMP
PO
SITIO
N.
N.
D.
PL
UGS
INTO
LO
W
ER
S
W
ITCH
ED
R
EC
EPT
AC
LE
.
PRE
C
IS
IO
N TI
G
375
W
IRI
NG
DI
A
G
RA
M FOR CODE 10894
L9 L10
L6
L5
L4
L1
3
L11
411 W 403 404 405 406 407 40
8
40
9
410 401 402
TIG OP TION P CB
J1
06/ 17/ 20 02
1
3456
89
10
7
2
1
3
456
8
9
10
7
J2
C3
FR
O
N
T
ELECT
RO
DE
REAR
ELECTRO
DE
WO
RK
212
214 213
21
5
TRANSF
OR
MER
PRI
MAR
Y
THERM
OS
TA
T
TRANSF
OR
MER
SECON
DARY
THERM
OS
TA
T
MIC
RO-
SW
IT
C H
223
4-S
T E
P
TRIG
GER
40 1B
31 1A
31 6A 31 6B
F
C
S
E
N.C.
CON
TROL PANEL (VIEWE
D FRO
M REA
R)
+
-
G
R
G
Y
(STI
CK)
(AU
TO BA
L )
(RE
M O TE)
(P.
FLO
W)
(T
HER
MA
L)
B
W
+
-
B
W
+
-
B
W
+
-
B
W
+
-
G
33 1
5 9 8 3 7 2 1 6 4
331
10
J10
L7
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
REMOT
E TM
AMP
TROL
OPTI
ONAL
GROUND
25 0A
25 1A
S1A
H1
S1
POWER SWI
TCH
L1 (U) L2 (V)
X1 X1
212
8 7 6 5 4 3 2 1
220 G1 217
J4
5 2 1 3
J7
G4 G3 G2
L12
6 4
10 9
216 21
8
J3
41
5 V
OL
T CONNEC
TI
ON
CONNECT S
TRAP
TO
HIGH (H4) (AS
SHOWN)
CONNECT S
TRAP
TO
MID (H3) 06/17/2002
105VAC
F
X1
4
52
52
CB2 5A
51
50
50
A
C1
,C
2 ,C3
P O W
E R
F A CT
O R C
A P A CI
T O R S , 6
0 /4
6 0
C 4 ,C
5
B Y-
PAS
S C
A P A C IT O R S , .0
0 4 7
C 6
H IG
H V
O LT
A G E C
A P A C IT O R , .001
5/ 1 2 k V
C 7
P H A SE SH
IF T C
A PAC
IT O R , 1 5 u F /2 5 0 V A C
C 8 ,C
9
H IG
H F
R EQ
P
R O T E C T IO
N C
A PA
C IT O R S , .2 2 /4
0 0
CB
1
C IR
CU
IT B
R E A K E R,
1
5 A
M P
CB
2
C IR
CU
IT B
R E A K E R,
5
A
M P
C R 2 ,C
R 3
1 2 0 V
AC
R
E L A Y C
O IL
CR
4
1 2 V DC RE
L A Y CO
IL
D1
F R E E W
H E E L ING
DI
O
D E
D2
B A C K G
R O U ND
DI
O D E
L 1
O
U T P UT
I N D U CT
O
R ( C H O K E )
L2,
L3
H IG
H F
R E Q I N D U C T OR
S
L4 -L13
R F T O R O ID
C
H OK
E S
R 1
O
U T P UT
CO
N T RO
L P
O T E NT
IO
M E T E R , 1 0 K
R2
B A L A NC
E C
O NT
R O L P
O T E N T IO
M E T E R,
1 0 K
R3
P O S T F
L O W
P
O T E NT
IO
M E T E R,
1 0 K
R4
M
IN O
U T P UT
P
O T E NT
IO
M
E T E R,
1
0 K
R 5
P H A SE SH
IF T R
E SI
ST
O R , 2
0 0 /1 0 0
R 6
H O LD
IN
G R
E S IS
T OR
, 50/
225
R 7
R E SI
ST
O R , 2
0 /1
0 0
R 8
R E SI
ST
O R , 5
/5 0
R 9
F R E Q CO
N T RO
L P
O T E NT
IO
M
E T E R,
1
0 K
R1
0
O
N T
IM
E CO
NT
RO
L P
O T E NT
IO
M E T E R,
1 0 K
R1
1
B A C K G
RO
U N D P
O T E NT
IO
M E T E R,
1 0 K
R 1 2
D O W
N SL
O P E PO
T E N T IO
M E T E R , 1
0 K
R1
3
H IG
H F
R E Q I N T E N S IT Y CO
N T RO
L , 3
/2 5
R1
4
R E S IS T O R,
8 /3 0 0
S1
IN
P U T PO
W
E R S
W
IT C H
S1
A
M
IC
R O SW
IT C H O
N I N PU
T P
O W
E R SW
IT C H
S2
P O L A R IT Y SW
IT C H
S2
A
M
IC
R O SW
IT C H O
N PO
L A R IT Y SW
IT C H
S C R 1 ,2 ,3 ,4
M
A IN P
O W
E R SC
R ’S
SV
1
G
A S SO
L E N O ID
VAL
VE,
1
1 5 V A C
SV
2
W
A T ER
SO
L E N O ID VA
L V E , 1 1 5 V AC
( O
P T IO
N A L )
T 1
MA
IN T
R A N S F O R ME
R
T 2
H IG
H V
O L T A G E T
R AN
SF
O R M E R
T 3
H IG
H F
R EQ
T
R AN
SF
O R M E R
22
0V
A C
232
50A
SV
2
WA
T ER VA
LVE
(OPT
IONAL)
N.D.
H5 (44
0V)
H4 (41
5V)
H2 (22
0V)
H3 (38
0V)
25
0
A
25
0
R210
G
(PU
L SE ON
) +
-
W
B
L1 (U) L2 (V) L1A L2A
BY
PASS
PC BO
ARD
TO GROUND PER
NATIONAL
ELEC
TRIC CODE
GND4
GND5
GND1
RE
CO
NN
EC
T PAN
EL
SU
PP
OR
T
T1
TRANS
.
FOO
T
CASE BACK
CASE FRONT
CONTRO
L
PANE
L
11
5 VAC
RECEP
T.
GAS VALVE
GND6
PRO
TECTIV
E BONDING CIR
CUIT
220 VAC RECEP
T.
38
0-40
0 V
OL
T CONNEC
TI
ON
22
0-23
0 V
OL
T CONNEC
TI
ON
GND-H2
GND-H
CONNECT S
TRAP
TO
LOW (H2)
ENHANCED DIAGRAMS