Lincoln Electric SVM186-A Welder User Manual


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ELECTRICAL DIAGRAMS
G-3
PRECISION TIG® 225
SCHEMATIC - COMPLETE MACHINE - ALL CODES (G5647)
EN-170
S
O
L
I
D
E
D
G
E
E
NGI
N
EE
RI
NG
CO
NT
RO
LLE
D
M
A
N
U
F
A
C
T
U
RE
R
:
No
R
EL
EASE
DF
R
OM
X
A.02
G5647
Precision Tig 225
MACHINE SCHEMATIC
NONE
G4588
Jbart o
R
Sam
ode
ll
Ap
prove
D
RAWN
BY:
DESIG
N
I
NFO
RMATI
ON
ENG
I
NEER:
AP
PRO
VED
:
REFERE NCE:
EQ
UIP
M
ENT
TYPE:
SUBJECT:
SCA
L
E:
MATE RI AL
DI SPOS
IT
ION:
APPROVAL
DATE:
PROJECT
NUMBER:
NA
C
RM38254
1
PAGE ___ OF
___
1
DO
C
UM
E
NT
N
UM
BE
R:
DOCUMENT
REVI SION:
THIS DOCUMENT CONTAINS PROPRIETAR
Y
INFORMATION OWNED B
Y
LINCOLN GLOBA
L, INC.
AND MA
Y
NOT BE DUPLICATED, COMMUNICATED
TO O
THER PARTIES OR US
ED FOR
AN
Y
PURPOS
E WITHOU
T
THE EXPRES
S WRIT
TEN PERMISSION
OF LINCOLN GLOBAL, INC.
PRO
PRIETARY & C
ONFIDENTIAL:
A
T
HE I
NF
ORMA
T
IO
N
ON
T
HIS
PRIN
T
IS
F
OR
RE
F
ER
ENC
E
ON
LY.
C
O
MPON
EN
T
S
AND
CIRCUI
T
RY
MA
Y
BE
DIFFER
ENT
F
RO
M
AN
AC
T
UAL
M
ACHI N
E.
06/20/2006
CHANG
E
D
ET
AIL:
G
5647
LE
A
D
C
OL
O
R
COD
E:
B-
BL
AC
K
O
R
GRAY
G-
GREEN
O-
ORANGE
R-
RE
D
O
R
PI
NK
U-
BL
UE
W-
W
HIT
E
Y-
Y
ELL
OW
C
OM
PONE
NT
V
AL
U
E
U
NIT
S:
CAPA
CIT
O
R: MF
D/
V
OLT
S
RE
SI
ST
O
R:
O
HM
S/
W
ATT
S
CONNE
CT
O
R
PI
N
N
UM
BER
S:
VI EW
OF
CONNEC
TO
RON PC BOARD
1
2
6
7
12
LA
TCH
EX.
12
PIN CONNEC
TO
R
LABELS:
C
OMM
ON
FR
AM
E
GROUND
EA
RT
H
GROUND
SCR4
SCR3
SCR1
SCR2
M
A
I
N
S
C
R
RECTIF
IE
R
D1
OUTPUT
INDUCTOR
AC
D
C
DC
DC
DC
AC
AC
AC
++
-
-
POLA
RI
T
Y
SWITCH
SHUNT
M
AI
N
TRANSFORMER
X1
X2
H1
H2
H3
L2
L
1
+
-
250
VA
C
.0047/
400
A/
200mV
S
2
C1
C2
L
1
DC
+
DC
-
DC
+
DC
-
G1
G2
G3
G4
218
217
216
220
SCR3, SCR2 CATHODE
SCR1 CATHODE
SCR4 CATHODE
SCR1, SCR4 ANODE
SCR1 GATE
SCR2 GATE
SCR3 GATE
SCR4 GATE
216A
G4
G3
G2
G1
220
217
218
FR
E
E
WHE
ELI
N
G
DI
ODE
POWER SWITC
H
R 222
(-)
W
221(+
)
W 221
R 222
S
HUNT (+)
S
HUNT (-)
1J1
2J1
TOROI
D
LOW
HIG
H
T1
BY
PA
SS A
SS
EMBL
Y
R
1
W
OR
K
SV
1
G
A
S
SOLENOID
FAN
X7
X8
HIGH FREQ.
TRANSFORMER
100/100
T2
S
F
C3
.00
1
5/
12KV
SPA
RK
GAP
.
020
R
3
200/100
C
4
15/250
H
I
G
H
VO
L
TAG
E
T
R
ANSFO
R
M
E
R
L2
L3
T3
EL
EC
T
ROD
E
H
O
L
DIN
G
R
E
S
I
S
T
O
R
S
231
231
232
236B
237
2
38
239
236
H
I-FR
E
Q (11
5
VAC)
GAS (115VAC)
F
AN (115VAC)
2
35
260
314
3
13
T
HERMOS
T
A
T
INPUT
235
232
260
232A
1
1
5
VAC IN
4J4
1J4
2J4
3
J4
X5
X6
X3
X4
1
8
VAC
C
ONTRO
L
BOARD SUPPL
Y
1
8VAC
TRIGGER CIRCUIT
209
210
201
204
AUX
.
WIN
DI
NGS OF
MAIN T
RAN
SFO
R
ME
R T1
C
HOKE TSTAT
(S
CH
EMATIC S22530
)
B
YPASS/STAB
I
L
I
ZER
PC
B
115VA
C
(115VA
C)
11
5VAC
5.5 OHMS
TYP.
1
4.5 KOHMS
T
YP.
1
2.5 OHM
TYP.
1
2
.5 OHM
T
YP.
T1
T1
HI
-F
R
EQ CI
RC
UIT
3
DIGIT
METER
CW
R1
CW
10K
REC
EP
TACLE
TM
OPTIONAL
A
MPTROL
REMOTE
CONTROL
A
ND
A
RC
S
TART
S
WITCH
A
B
C
D
E
F
U
N
R
B
W
10K
TOROI
D
C
A
B
OUTP
UT
CO
NT
RO
L
(E
N
CO
DER)
+
5V
ref
+
5
V
r
ef
C
W
R2
C
W
10K
+
5
V
r
ef
CW
R3
CW
10K
+
5V
ref
B
ALA
N
CE
PU
LSE FREQ
UEN
CY
POSTFLOW
+
15V
M
ODE
STICK
(
RED)
TIG
(
G
R
E
E
N
)
M
IC
R
O
-
P
RO
C
ESSOR
A
UT
0BALA
NCE
(G
R
EE
N)
F
R
E
QUE
N
C
Y
(G
R
EE
N)
THE
R
MAL
(YELLOW)
SEE
RATIN
G PL
AT
E
FOR
SPE
CIFIC
VOLTAGES
230
or
400
-
415
or
575
VOLT C
ONNE
CTIO
N
H
1 and
H
3
(H
IG
H) T
O P
OWER
S
WI
TCH.
208
or
380 o
r
460
VOLT C
ONNE
CTIO
N
H
1 and
H
2
(
LO
W) T
O P
OWER
S
WI
TCH.
H
3
NOT CONNE
CTE
D
; I
NSU
LA
T
E.
H
2
NOT CONNE
CTE
D
; I
NSU
LA
T
E.
C
1
A
N
D C
2
M
UST
AL
W
A
YS
B
E
C
ONNE
C
TE
D
A
CR
O
SS
T
RA
N
SFORMER
P
R
IMAR
I
ES
VOLTAGE RECONNECTION
(
AS S
HOWN
& A
S S
H
IPPE
D FROM FA
CTO
RY)
R2
C
LOS
E
D
I
N DC
311
312
311
312
MICRO SWITCH INPUT
5
J3
6
J3
N.C.
R5
12/100
E
ACH
R4
220A
218A
AR
C
ST
A
RT
E
R
ASS
EM
BL
Y
1J3
2
J3
7J3
8J3
4J3
3J3
100/100
284A
285A
285B
2
84B
284
2
85
MIC
RO SWITC
H
C
LOSE
D I
N
DC
OPEN I
N A
C
W
B
G
INPUT PLUG
216
BA
C
KGRO
UN
D
R
ESISTORS
BACKGROUND AC INPUT
BACKGROUND ( - )
BACKGROUND ( + )
240
11J3
9J3
10J3
12J3
5J2
6J2
3J2
8J2
2J2
1J2
4J2
7J2
1J5
3J5
2J5
5J5
6J5
METER
INTE
R
FA
CE
LE
D I
NTE
R
FA
CE
J2
J3
J4
J5
J6
J1
+15V
(G
REEN)
CO
NT
RO
L PCB MAIN
COMPO
NE
NT &
DIA
NOSTI
C LE
D LAYOUT
(VIEWED F
ROM
COMPO
NE
NT SI
D
E)
AUTO LOCAL/REMOTE
STICK MODE
:
ALWAYS LOCAL
TIG MODE
:
REMOTE
I
FPLUGGED
LOCAL
I
FUNPLUGGED
2 PIN
6 PIN
8 PIN
12 PIN
4 PIN
4PI
N(
W
HIT
E)
PROGR
AMMI
N
G
CONNE
CT
OR
H
I-
FREQ BYPASS
CONNECTI ON
SCH
EMATIC G5640-
ASSEMBLY
G5641-
CO
NT
R
OL PC BOA
RD
+5V
30 S
1S
20 HZ
O
FF
MA
X.
PEN
ET
R
ATI
ON
A
UT
O
MA
X.
CL
EA
NI
NG
5
-
2
30A
A
Cand DC
+5V
+5V
re
f
O
UTPUT CONTROL &
MODE SETTINGS ARE
M
EMORIZED AT POWER
-
DOWN AND RECALLED
A
TPOWER
-
U
P
S
CR
GAT
ING & SN
U
BBE
R
+1
5V
+5V
MIC
RO
-STA
RT
CI
RC
UIT
+1
5V
OUTP
UT
R
EGU
LATOR
+1
5V
115V CIRC
UIT
T
RIA
C
& OPTO-T
R
IA
C
D
RIVE
R
+1
5V
(P
C
B AS'BLY
L10121-1
)
435 OHMS TYP.
12 OHMS TYP.
FAN RUNS FOR 5 S AT POWER-UP
STOPS AT
I
DLE 8 MINUTES
AFTER WELDING.
COM
PO
NE
NT LO
C
ATIO
N
D
ES
C
RIPTIO
N
S ARE AS VIE
WED
FROM
F
RO
NT
O
F
MAC
HI
N
E U
NLESS STATE
D
OT
HERW
ISE
G4
G
3
G2
G1
IN-LI
N
E
CONNE
CT
O
RJ7
4
3
2
1
I
n
F
ront
o
f
m
a
in
t
rans
f
orm
e
r,
A
ttached
t
o
B
ase
Lef
t
side
o
f
Machine
n
ear
f
ron
t
R
e
ar Panel
R
ight Side
R
i
ght Side of
S
C
R
B
ridge
R
e
cti
f
ier
.
T
op o
f
M
achine
behind C
hoke.
R
i
ght
s
ide o
f
M
achine
a
bove Choke Coi
l
.
R
i
ght
s
ide o
f
m
a
chine,
fron
t
o
f
gas
solenoid,
a
t
t
ached
t
o
B
ase
A
ttached
t
o
P
o
w
e
r S
w
i
tch
S
1
Front Panel Lef
t
side
F
ront Panel Center
Front Panel Top
I
nside
hi-
f
req
box
on
r
ight
s
ide o
f
m
a
chine
n
ear
f
ron
t
R
e
ar o
f
m
a
chine a
t
t
ached
t
o
base,
below fan
0.1 HZ
R
ight
fron
t
side
o
f
Main Trans
form
er
Bet
w
een S
C
R
Bridge halves
behind choke
.
M
ounted
t
o
f
ron
t
s
ide
o
f
h
i-
f
req
box
on
right
side o
f m
achine
n
ear
f
ron
t
.
Lo
w
er lef
t
side
o
f
Polar
ity
S
w
itch
Inside
hi-
freq
box
on
r
ight
s
ide o
f
m
a
chine
near
fron
t
BACKGROUND AC INPUT
245
244
216A
240
TWISTED PAIRS
PO
STFL
OW
FR
EQUENCY
(
NO
R
MALLY
CLOSE
D
O
PEN AT 135
C
TYP.)
R
ight rea
r
side o
f
Main
Transfor
m
er
80 VAC
On top
o
f
Main
T
ransfor
m
e
r
Inside
sleeving
a
t
top
lef
t
side
o
f
Main Rectifier
DISPLAY PRESET AT
IDLE
A
CT
U
AL AMP
WHE
N WEL
DING
NO
HO
L
D F
UN
CTIO
N
(
DI
SA
BLE
D I
N
STI
C
K)
O
UT
P
UT
CO
NT
R
OL
X1
SOFTW
AR
E
VE
RSI
ON
LA
BE
L
6
5V I
N
D
C
75V I
N
AC
POWE
R-
U
P
SEQUENCE
MET
E
R
AN
DM
OD
E
DI
S
PL
A
YT
H
E
PRE
VI
OU
S
O
UT
P
UT
CO
NT
R
OL
AN
DM
OD
E
S
ETTI
NG
S. F
A
N
RUN
SF
O
R5
SECOND
S. IF M
OD
EI
STI
G,
GA
SFL
OW
SF
O
R
ATIM
E
S
ET
B
YT
H
E
PO
STFL
O
W
KNO
B.
O
UT
P
UT I
S
H
OT IF
MO
D
EI
S
STI
C
K. I
NTIG M
OD
E
O
UT
P
UT I
S
C
OL
D
U
NTI L
TRI
GGE
RI
S
CL
OSED
(DI
S
P1)
A1
S
1
MET
E
R,
ENCODE
R,
S
WIT
C
H, L
E
Ds,
A
N
D
A
LL
P
O
T
E
N
TIOM
E
T
E
R
S
A
RE
MO
U
NT
E
D
O
N
P
C
BOARD
T
Y
P
I
C
A
L
O
CV
TO
GGLE BETWEEN
T
IG &
S
TI
CK.
HI
-F
REQ, GAS, BALANCE
CONTROL, PULSE
FREQUENCY, &
MI
CR
O-
STAR
T
CI RCU
IT
ARE DISABLED IN S
TI
CK
L
E
D
1
LE
D 3
LE
D 4
L
E
D
5
LE
D 2
THE
R
MAL
(YELLOW)
LE
D 6
NEX
T
TO
M
ODE SW
IT
CH
NEX
T
TO
BALANCE P
OT
.
NEX
T
TO
PULSE
FREQUENCY P
OT
.
N
EX
T
T
O
M
E
TER
NEX
T
TO
M
ETER
NEX
T
TO
M
ODE SW
IT
CH
OFF
IN S
TI
CK AND DC
T
IG
OFF
IN S
TI
CK, BLI NKS AT
FREQUENCY RATE
TWO
T
HERMAL LEDs
T
O
LIGH
T
THROUGH
BACK
-LIT T
HERMAL
SYMBOL
MO
DE
MI C
R
O-
PROCESSOR
1J6
2J6
3
J6
4J6
+5V
re
f
D
AT
A
S
C
L
K
XRES
P
ROGR
A
MMI
N
G
C
ONNE
C
T
O
R
FO
R
S
OFT
WA R
E
UPGRADE
HI-F
RE
Q
BYPAS
S
CONNE
CTI
ON
FR
OM
B
OTT
OM L
EFT
MO
U
NTI
N
G
H
OL
ET
O
SHE
ET
MET
AL
Left fr
ont
SCR4
SCR2
SCR1
SCR3
G4
216
G3
2
1
8
G2
G1
217
AC
D1
+
( )
( )
_
216A
X2
220
218A
POS
SHUNT
220A
DC
216A
R
222R 222
W
222
TO0
CO
PPER BAR
B
OTTOM
CO
PPER
BAR
6
GA.
F
L
EX
L
EA
D
S
7
GA.
F
L
EX LEAD
A
LU
MI
N
UM
BAR
FA
RT
HE
ST
L
EF
T
SCR ( VI EWED
FR
OM
F
RO
NT
)
FA
RT
HE
ST
RI
GH
T
SCR
( VIEWED
F
RO
M
FR
ON
T)
S
CR
H
E
A
T
S
INK
SC
R BRI
DGE AN
D POLARIT
Y
S
W
ITCH
CO
N
NE
CTION DETAIL
240
POS
DC
285
284
O
U
T
PU
T
INDU
C
T
O
R
X1
MOU
NTIN
G HO
LE
Ga
ng
D
Ga
ng
A
gang
B
Ga
ng
C
Re
ar
gang
G
R
e
a
r
g
ang
H
G
a
n
g
F
Ga
ng
E
GAN
G LO
C
ATI
ON
S
ARE
VI
EWE
D F
R
OM R
EA
R
OF
S
WITC
H
P
OL
A
RIT
Y
S
WI T C
H
MI CR
O
S
WI T C
H
A-C, D
-E,
B-F
B-D, C
-E,
A-F,
G-H
B-
D, A-E, C-F, G-H
OPEN
CL
OSED
CL
OSED
AC
DC+
DC-
3
11
312
MICRO S
WI
TC
H
U
NUSED
T
ER
M
INA
L
RECONNE
CT I
S
DON
E
AT
POWE
R
S
WI T
CH
C
e
nter
o
f
m
a
chine
T
op rear
S
E
E
C
ONNEC
T
IO
N
D
ET
A
IL
S
ET
P
OI
NT
PHAS
E_FI
RE
INTE
R
FA
CE
INTE
R
FA
CE
A
C/
DC
TH
E
RM
O
STAT
DETER
MI
NE
IF
HI
-F
REQ IS
CON
TI
NUOUS OR START
ONL Y,
M
IN. CURREN
T,
AND
BALANCE CONTROL
DISABLE OUTPU
T
&HI
-F
REQ
IF T
HER
MO
STA
T
OPEN
CURREN
T
FEEDBACK
Iarc
PHASE
D
ET
E
CT
OR
POWER S
U
PPLY
+1
5V
+5V
+5V
re
f
-15V
P
HASE
TO
M
ICRO PROCESSOR
AND SCR GA
TI
NG
PHASE
PHASE
A
UTO
LO
C
AL/
R
EMOTE
CO
NT
RO
L
DET_REM
REM_SENSE
REM_POT
TO
M
ICRO
PROCESSSOR
DE
T_
REM
RE
M_
SENSE
RE
M_
P
OT
Fr
om
Auto
Lo
c/R
em
P
oll i
ng
si
gn
al
Hi
=
Lo
c
al
R
em
ote c
on
t
rol
TRIGGE
R
INTE
R
FA
CE
TRIGGER
TRIGGER
TO
M
ICRO
PROCESSOR
DO N
OT
REVERSE LEADS
20
9&
21
0, USED
F
OR SCR
PHASE
T
IM
ING
115V
5000V
HI
-F
REQ
OFF
IN S
TI
CK
STAR
T
ONLY IN DC
T
IG
CON
TI
NUOUS I N AC
T
IG
Right front
C
ent
er fro
nt
TYP
. RPM:
1600
R
PM 60Hz
1340
R
PM 50Hz
1
5 - 20 OHM
GATE-
C
ATHO
DE
R
ESISTAN
C
E T
YP
.
F
IRE_SCR
BG
-15V
RF
CHOKES
+
15
V
-1
5V
+5V
+2
4V
+5V
+
24
V
+5V
re
f
+
24
V
+5V
re
f
+2
4V
DC
AC
POS
Gang
D
Gang
A
Gang
C
Gang
G
Gang
B
Gang
H
Gang
E
G
ang F
CBW
CBW
CBW
CBW
CBW
CBW
CBW
CBW
CBW =CONNECT ED
B
YSW
I
T
C
H
T
HESE CONNEC
T
I
O
NS
ARE
M
ASE BY POLAR
IT
Y
SW
IT
CH,
T
HEY ARE N
OT
P
HYSI CAL LEADS
CBW
SEE CONNEC
TI
ON DETAIL
B
A
L
A
NC
E
C
O
N
T
R
O
LI
S
DI
SA
BL
E
DI
N
STI
C
K
AND
D
CTI
G
P
UL
S
EF
REQUENC
YI
S
DI
SA
BL
E
DI
N
STI
CK
115
VAC
C
B
1
231A
231B
233
232A
C6
C5
.
22/400V
2
0A (2
0
8V/2
3
0V)
6
A (3
8
0
V & ABOVE
)
SC
R1
SC
R3
SC
R2
SC
R4
4 RED LED'S
B
AL
ANCE
MI
CRO
ST
ART
GA
S
FA
NHF
AC
LO
C
AL
GREE
N L
ED'S
TROU
BLE
SH
OOTI
N
G LE
D'
S
PRESEN
T O
NLY O
N
P
C
B
RE
VI
SIO
N
B O
R L
AT
ER
G-3
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
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