Filter
Top Products
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
G-10
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 255
MACHINE SCHEMATIC — SQUARE WAVE TIG 255
SCR2 GATE
SCR3 GATE
SCR1 GATE
SCR4
SCR1
SCR3
SCR2
MAIN
RECTIFIER
D1
150
/400
OUTPUT
INDUCTOR
AC
DC
DC
DC
DC
DC
DC
AC
AC
AC
++
-
-
A
B
C
D
E
F
U
N
R
B
W
RECEPTACLE
REMOTE
CURRENT
CONTROL
REMOTE
ARC START
SWITCH
10K
R1
R2
C1
POLARITY
SWITCH
SHUNT
ELECTRODE
WORK
SV1
SV2
GAS
SOLENOID
SOLENOID
WATER
CB1
115V/15A
FAN
X3
X4
250
SEE NOTE A
MAIN
TRANSFORMER
RECONNECT
PANEL
X2
X1
H1
H2
H3
H4
L2
L1
T1
PL1
C
O
N
T
R
O
NO
CONNECTION
ELECTRICAL SYMBOLS PER E1537
SCR4 GATE
+
-
INPUT
LINES
C8
C7
TM
DISPLAY
CLOSED
IN DC
REMOTE
HIGH FREQ.
TRANSFORMER
.22/400V
.22/400V
115 VAC
RECEPTACLE
3KV
.0047/
G
LED(+)
D0
D1
D2
D3
D4
D5
D6
D7
LED(-)
VDD
Vo
R/W
VSS
RS
E
LCD
ROW 3
COL 1
COL 2
COL 3
COL 4
KEYPAD
SCR1 GATE
SCR2 GATE
SCR3 GATE
SCR4 GATE
SCR3 CATHODE
SCR4 CATHODE
400A/200mV
24VAC
16VAC
16VAC
16VAC
SQUARE WAVE TIG 255
BUZZER
PIEZO
S2A
S2
1J9
2J9
3J9
4J9
5J9
6J9
7J9
8J9
4/220
50/100
SCR1 & SCR2 CATHODE
9J5
4J5
1J5
2J5
3J5
8J5
6J5
4J11
1J11
2J11
3J11
8J11
6J11
SCR4 CATHODE (MAIN RECTIFIER AC1)
SCR3 CATHODE (MAIN RECTIFIER AC2)
SCR1 & SCR2 CATHODE (MAIN RECTIFIER +)
MAIN RECTIFIER -
10J10
4J10
1J10
12J10
2J10
3J10
9J10
7J10
12J6
5J6
2J6
8J6
1J6
ELECTRODE SENSE
WORK SENSE
REMOTE CONTROL HIGH
REMOTE CONTROL WIPER
REMOTE CONTROL LOW
18VAC
18VAC
115VAC
115VAC FOR HI-FREQ
HI-FREQ CONTROL1
HI-FREQ CONTROL 2
115VAC FOR SOLENOIDS
115VAC FOR SOLENOIDS
3J4
2J4
3J14
2J14
6J14
ARC START SWITCH
ARC START SWITCH
3J6
4J6
11J6
AC/DC MICROSWITCH
10J6
AC/DC MICROSWITCH
10J12
ELECTRODE SENSE
WORK SENSE
AC/DC MICROSWITCH
AC/DC MICROSWITCH
4J13
12J13
5J13
13J13
2J13
1J13
9J13
OPTIONAL AMPTROL REMOTE
CONTROL AND ARC START SWITCH
3J8
9J8
1J8
7J8
2J8
6J8
12J8
5J8
11J8
4J8
10J8
6J6
13J6
T3
S
F
HIGH
FREQUENCY
CIRCUIT
C3
.0015/
12KV
X5
50/60HZ MACHINES ONLY
5J4
1J4
4J4
1J3
2J3
9J3
10J3
11J3
12J3
13J3
14J3
15J3
16J3
4J3
5J3
7J3
3J3
6J3
8J3
ROW 1
ROW 2
ROW 3
1J1
2J1
3J1
4J1
5J1
6J1
7J1
8J1
COL 4
COL 3
COL 2
COL 1
1J2
5J2
3J2
7J2
9J2
ROW 1
ROW 2
ROW 4
ROW 5
2J2
4J2
6J2
8J2
9J11
4J12
11J12
5J12
12J12
2J12
8J12
1J12
3J12
3J15
2J15
6J15
1J15
5J15
4J15
432
433
432B
435
436
429
432A 232A
233
229
237
235
236
303
311
301
309
302
313C
305
312
304
218A
217A
G3
G2
220A
G1
G4
216A
(-)
(+)
C8 C9
C4 C5
SPARK
GAP
BYPASS
PC BOARD
L
P
C
B
O
A
R
D
T
P
R
O
E
C
T
I
O
N
P
C
B
O
A
R
D
231
232
230E
230
230C
229A
52 52A
230D
232B
233A
230E
R3
200/100
R4
200/100
50/460
LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
FROM MAIN TRANSFORMER (T1)
RECONNECT PANEL, ALONG WITH CORRECT LEAD
208/230/460, 200/380/440
LEAD #250 CONNECTS TO THE H5 LEAD OF
THE MAIN TRANSFORMER (T1)
230/460/575
LEAD #250 CONNECTS TO THE "MID" TERMINAL
ON THE RECONNECT PANEL, ALONG WITH THE
H3 LEAD FROM THE MAIN TRANSFORMER (T1)
NOTE A:
CONNECTS ACCORDING THE THE INPUT VOLTAGE
LEAD #250 FROM POWER FACTOR CAPACITORS
B-BLACK
R-RED
Y-YELLOW
G-GREEN
U-BLUE
W-WHITE
COMPONENT VALUE
UNITS:
CAPACITORS:
MFD/VOLTS
RESISTORS:
OHMS/WATTS
LEAD COLORING CODE:
CONNECTOR PIN NUMBERS:
VIEW OF CONNECTOR ON PC BOARD
123 8
916
LATCH
EXAMPLE: THIS PIN IN
CONNECTOR J10 IS "6J10"
123
O-ORANGE
16
2736
SCHEMATIC - MACHINE
12J8
11J8
10J8
B
B
R
W
R
O
U
Y
Y
U
O
8J14
4J14
1J14
5J14
11J13
3J13
235A
230B
C2
15/250
51
220V
RECEPTACLE
CB2
220V/2A
H5
T4
HIGH
VOLTAGE
TRANSFORMER
T2
PC BOARD
KEYPAD LED
1J7
R
W
222
221
SHUNT (-)
SHUNT (+)
SHUNT (+)
SHUNT (-)
H1
25/25
200/240/400, 220/380/415. 380/415/500
2J7
3-10-94
L1
SHUNT TOROID L2
L3
L4
240
239A
A
NOTE: This machine schematic is provided for reference only and may not be totally applicable to every code covered in this manual.