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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 available from Lincoln Electric. This information is pro-
vided 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.
ELECTRICAL DIAGRAMS
G-10
PRECISION TIG® 225
PC BOARD ASSEMBLY - BYPASS (L10121)
EN-168
S
O
L
I
D
E
D
G
E
L10121-3
SW
TI
G
175
& 275
BYPASS/STABILIZER P.C. BOARD ASSEMBLY
1:1
L1012
1-1
DO N
OT S
CA
LE
TH
IS
D
RAW
ING
EQU
IP
ME
NT
TYPE
:
SU
BJ
EC
T:
UF
CRM34
432
1
PA
GE
___
OF
___
1
ENGINE
ERING CONTROL
L
ED
MANUFACTURER:
No
T
HIS
DOC
UME
N
T C
ON
TAINS P
R
OP
RIETA
RY IN
FO
RMATIO
N
OW
NE
D BY L
IN
C
OLN
GLOBAL, IN
C. A
N
D MAY NOT BE
D
UPLI
CA
TE
D,
C
OMMU
NI
CA
TE
D
TO OT
HE
R PA
R
TIES O
R
USE
D
FO
R A
NY P
U
RP
OSE WIT
HOU
T THE E
X
PRESS
W
RITTE
N PE
RMISSIO
N
OF LIN
C
OLN
GLOBAL, IN
C.
PROPRI
ETA
RY & CONFIDE
NTIAL:
REVISED P.C.
B
OARD B
L
ANK
INFORMAT
ION
t
MAT
ERIAL TOLERANCE (
"
")
TO A
G
REE
WITH PUBLISHED
STANDARDS.
O
N ALL AN
GLES IS
±
.5
OF A
DEG
REE
ON
3
P
LA
C
E
DECIM
ALS
IS
±
.0
02
i
n.
(
±
0.05
mm)
O
N 2
PLACE DEC
IMALS IS
±
.02
in
. (
±
0.5
mm)
U
NLESS
OTHERW
ISE
SPE
C
IF
IE
D
TOLERA
N
CE
:
MANUFACTURIN
G
TOLERANCE PER
E2056
C
HA
N
GE DE
T
AIL:
REFE
RE
N
CE:
SCA
LE:
MATE
RIAL
DISPO
SITION:
APP
ROV
AL
DAT
E:
PRO
JE
CT
NU
MBE
R:
DOCUMENT
N
UMBER:
DOCUMENT
REVIS
I
ON:
U
NITS:
IF
PRIN
TED
@
A2
S
IZE
IN
CH
9-7-
2007
f
ivory
-
-
DR
A
WN
BY:
E
NG
IN
EE
R:
CLEVELAND
APP
RO
VE
D:
CO
NT
ROL:
C
L10121-3
Insigh
t
C
AP
ACI
TORS
= MFD
/V
OLTS
INDU
CTA
NC
E
= HENR
YS
1
P.
C
. B
OARD
BLA
NK1
I
TEM
REQ'D
PA
RT N
O.
IDE
NTIFI
C
ATION
3
.16
OZ
E2861
SE
ALA
NT
SE
E BL
AN
K I
NF
O.
M
AK
E P
ER
E191
1-
ROHS
TES
T
PE
R
E355
3-
B
L101
21-3
D0
MANUFA
CTU
RED
AS:
IDE
NTIFI
C
ATION
CODE
N.C
.
SQ
U
EE
ZE TOGETHE
R
I
TEM
S
C1-C
4,
TP1
A
ND
C5-C
9,
TP2
BEF
OR
E APPLYI
N
G SEAL
A
NT.
N.D
.
APPLY SEALA
NT AS S
HO
WN
.
BOT
TOM O
F BO
ARD.
N
OTES:
ENC
AP
SU
LATE
WI
TH E1844,
2
CO
ATS.
N
.F. KEEP
THIS A
R
EA F
R
EE O
F E
NC
APS
U
LAT
IO
N
,
TOP
A
ND
N
.G.
TIN
ALL E
X
POS
ED C
OPP
ER WI
TH SOL
DER
IN T
H
IS A
R
EA,
BOT
H
SI
D
ES O
F BO
ARD.
WI
THI
N 0.5" 0 (B
OTH SI
D
ES
).
N.H
.
N
O I
CIC
LES O
R
SOL
DER
BLOBS A
R
E PE
RMIT
TED
SCHEM
ATIC
REFERENC
E: S
22530
-3
D0
FOR
P
A
RTS
ORDER
S
ONLY:
INCLUD
E S2
2772P
RI
NT
3
1
(.3
38
)
(3.
462
)
N.C
.,
N.D.
0
3.80
±
.04
(3.
450
)
(.3
50
)
(1.
900
)
4.50
±
.04
(.4
38
)
(4.
250
)
0
1.00
XXX
XXXXXXXXXXX
XXXXXXXXXXX
XXX
XXXXXXXXXXX
XXX
N
.F.
,
N
.G.
N.H.
XXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
TP1 TP2
R1
C9
C1
C2
C3
C4
C5
C6
C7
C8
L10121-3 BYPASS/STABILIZER
SE
E EL
E
CTR
ONIC
FI
LE
FOR
A
DDIT
IO
N
AL I
NFORM
ATION
P.C
.
BOARD
BL
ANK
I
NFORM
ATI
ON
BU
Y
COM
PLETE AS
L10121
-D
(2
LA
YE
R
B
OARD
PE
R
E328
1
WI
TH LEA
D
F
R
EE
H
ASL
SURFAC
E
FI
N
IS
H
).
M
AK
ES 1
2 B
OARD
S P
ER
PA
N
EL.
A
LL
C
OMP
ON
E
NT
S A
ND
MATE
RI
ALS
U
SE
D IN
TH
IS
ASSEM
BL
Y ARE TO
B
E
R
oH
S
C
OMPLIA
NT
PE
R
E4253.
REFERENCES
QTY
PART NUMBER DESCRIPTION
C1, C2, C3, C4, C5, C6, C7, C8 8
T11577-58K
CAPACITOR,CD,.0047,3000V,20%
C9
1
S13490-155
CAPACITOR,POLYPROPYLENE METALLIZED
FILM,PPMF,15MF,250VAC,10%
R1
1
T14648-25
RESISTOR,WW,5W,10,5%,SQ
TP1, TP2 2
T13640-18
MOV,320VRMS,150J,20MM
G-10
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