Lincoln Electric IM908 PRECISION TIG 275 - Manual (Page 40)

F-1 WIRING DIAGRAM F-1
PRECISION TIG 275
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
.
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
R9
FREQ
ON TIME
DOWN SLOPE
BACKGROUND
401D
402
403
405
406
408
409
410
401B
ADVANCED CONTROL
PANE
L
(OPTI
ONAL)
401C
401D
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
EX
A M
P
L E:
T
H
IS
I S
P
IN 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
41
5 VO
L T CONNEC
TI
ON
CONNECT S
TRAP
T
O
HIGH (H4) (AS SHOWN)
23
2
H5 (44
0V)
F
W209
18VAC X7
R210 201
X8
F S
X5 X2 X1
T1
78VAC
S
204
115V
A C
X9 X1
0
20VAC
X3
H4 (41
5V)
H2 (22
0V)
X6
262
263
63.
5VAC
267 268
CR4
231A 231
11
5VAC X4
CB1 15A
232
231
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
L Y
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
G4031-2
B
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
.
PRE
C
IS
IO
N TI
G
275
W
IRI
NG DI
A
G
RA
M FOR CODE: 11370
L9 L10
L7 L6
L5
L12
L4
L13
L1
1
J3
N.
D.
N.C.
C1
RECONNECT PANE
L
H4
H2
H1
H3
S1
POWER SWI
TCH
H1
CAPAC
IT ORS
(O
P T IONA
L)
PO
W E R F A C T O R
C2
GR
OU
ND
HIGH
MID
LOW
COM
25
1
2
1
3456
89
10
7
2
1
3
456
89
10
7
J2 J3
2
1
3456
89
10
7
OR
N.
C.
38
0-40
0 VO
L T CONNEC
TI
ON
CONNECT S
TRAP
T
O
MID (H3)
22
0-23
0 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
SV2
WAT
ER VA
LVE
(OPTI
ONAL)
105VAC
50A
F
X1
4
52
CB1 15A
52
CB2 5A
51
50
50A
C1,
C2
P O W
E R F A CT
O R CA
P A CI
T O RS
, 5
0 /4
6 0 ( O P T IO
NA
L )
C 4 ,C
5
B Y -PAS
S C
A PAC
IT
O R S , .0
0 4 7
C6
HI
GH V
O LT
A G
E CA
P A C IT
OR,
. 0015
/12k
V
C7
P H A S E S
H IF
T CA
P A
C IT OR,
15uF
/250
V A C
C8,
C9
HI
GH F
R E Q P
R OT
E C T IO
N CA
P A CI
T O
RS
, .
22/
400
CB
1
C IR
CUI
T B
R E A K E R,
15 A
M
P
CB
2
C IR
CUI
T B
R E A K E R,
5 A
M
P
CR4
12V
DC
RE
LA
Y CO
IL
D1
F R E E W
H E E L ING
DI
O
D E
D2
B A CK
G
R O U N D DI
O D E
L1
O U T P U T I N D UCT
O
R (C
HO
K E )
L2
,L
3
H IG
H F
R E Q I N DUC
T O
RS
L4
-L13
RF
T
O RO
ID
CH
O K E S
R 1
O U T P UT
CO
NT
RO
L P
O T E NT
IO
M
E T E R , 1
0 K
R2
B A LA
NC
E CO
NT
RO
L P
O
T E NT
IO
M
E T E R,
10K
R 3
PO
ST
F
L O
W
PO
T E N
T IO
ME
T E R
, 1
0 K
R4
M
IN O
U T P UT
P
O T E N T IO
M E T E R,
1
0 K
R 5
PH
ASE
SH
IF
T R
E SI
ST
O R , 2
0 0 /1
0 0
R6
HOLDI
NG RE
S IS
T O
R , 50
/225
R7
RE
S IS
T OR,
20/
1 0 0
R8
RE
S IS
T OR,
5/
50
R9
F R E Q C
O N T RO
L P
O T E N T IO
M
E T E R,
1
0 K
R10
O N T
IM
E CO
NT
RO
L P
O T E NT
IO
M
E T E R,
10K
R11
B A CK
G
R O U N D P
O T E
NT
IO
M
E T E R,
10K
R 1 2
D O W
N SL
O P E P
O T E
N T IO
M
E T E
R , 1
0 K
S1
IN
P U T PO
W
E R SW
IT C H
S2
PO
L A R IT Y S
W
IT
C H
S2
A
M
IC
R O SW
IT C H O
N PO
L A R IT
Y S
W
IT C H
SC
R 1 ,2 ,3
,4
M
A IN
P
O
W
E R S
C R ’S
SV1
G AS S
O L E N O ID
VAL
VE
, 1
1 5 V A C
S V 2
W
A T E R S
O
LE
N O
ID
V
A LV
E , 1
15V
A C (OP
T IO
N A L )
T1
M
A IN
TR
A N S F O R M
E R
T 2
H IG
H
V
O L T AG
E T
R AN
SF
O
R M E
R
T 3
H IG
H
F
R EQ
T
R AN
S F O R ME
R
220V
A C
N.F.
H3 (38
0V)
25
0
A
250
G
(PU
LS
E ON)
+
-
W
B
L1 (U) L2 (V) L1A L2A
BYP
ASS
PC BOARD
TO GROUND PER
NATI
ONAL
ELEC
TRIC CODE
GN
D-
H2
GN
D-
H
GN
D4
GN
D5
GND1
RE
CO
NN
EC
T P
ANE
L S
UPP
OR
T
T1
TRANS. FOO
T
CASE BACK
CASE FRONT
CONTROL
PANEL
115 VAC RECEPT
.
GAS VALVE
GND6
PRO
TECTIV
E BON
DING CIRCUIT
22
0 VAC
RECEPT
.
313A