Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 149

G-3
maChiNE SChEmaTiC (G2522)
(+)5 V
1J12 301
COMMON
2J12 302
DATA
3J12 303
CLOCK
4J12 304
UNREG. TO (+) 5 V REGULATOR ON CONTROL BOARD
1J13
UNREG. TO COMMON ON CONTROL BOARD
2J13
(+) 15 V
3J13
(‐) 15 V
4J13
PWR SUPPLY GND. TO CONTROL BRD. COMMON
5J13
AC SYNC
6J13
GAS (& WATER) VALVE CONTROL
8J13
HIGH FREQ. CONTROL
9J13
INTERLOCK CONTROL (OVER VOLTAGE SHUTDOWN)
10J13
PENETRATION SCR CONTROL
1J14
CLEANING SCR CONTROL
2J14
SCR GROUND (TO GND ON POWER BRD)
3J14
BACKGROUND COMMAND
4J14
BACKGROUND GROUND
5J14
DC OCV BOOST RELAY (CR3) CONTROL
6J14
AC OCV BOOST RELAY (CR2) CONTROL
7J14
24 VAC COMMON
1J9 B
ELECTRODE SENSE
2J9
REMOTE ARC START (TRIGGER) SWITCH 24 VAC
3J9
REMOTE CURRENT CONTROL HI
5J9
REMOTE CURRENT CONTROL WIPER
6J9
REMOTE CURRENT CONTROL LO
7J9
DC MODE SWITCH S1A 24 VAC
8J9
SHUNT (+)
1J8 222
SHUNT (‐)
2J8 221
2J10 2J19
1J10 1J19
11J10 11J19
12J10 12J19
9J10 9J19
8J10 8J19
7J10 7J19
6J10 6J19
5J10 5J19
4J10 4J19
3J10 3J19
15J10 15J19
10J10 10J19
14J10 14J19
13J10 13J19
CW
PEAK
CURRENT
14J11 414
13J11 413
11J11 411
10J11 410
8J11 408
9J11 409
7J11 407
6J11 406
5J11 405
4J11 404
3J11 403
2J11 402
1J11 401
LOCAL
REMOTE
S10
12J11 412
REMOTE
(+)15 V
5J12 305
*
GAS & WATER
6J12 306
*
HIGH FREQ.
7J12 307
*
ARC ESTAB.
8J12 308 *
START
9J12 309
*
PEAK
10J12 310
*
BACKGROUND
11J12 311 *
CRATER FILL
12J12 312
PRIMARY THERMOSTAT
4J1 210
PRIMARY THERMOSTAT
8J1 211
301 2J7
302 4J7
BACKGROUND RECTIFIER (+)
6J1 213
303 1J7
BACKGROUND RECTIFIER (‐)
304 3J7 5J1 214
SCR1 GATE
1J2 2J1 G1
SCR2 GATE
2J2 13J1 G2
SCR3 GATE
3J2 9J1 G3
SCR4 GATE
4J2 1 2J1 G4
B.G. TRANS.
5J2 7J1 264
MAIN RECT. AC
6J2 11J1 216
MAIN RECT. AC
* 1J1 217
MAIN RECT. +
8J2 3J1 218
*
BACKGROUND RESISTOR
14J1 212
9J2
*
10J2
*
1J5
*
2J5
3J5
1J4 Y
4J5
2J4 Y
5J5
*
10J4
6J5 R
*
4J4 U
7J5
5J4 W
6J4 U
* 12J4 R
5J3 267
6J3 268
1J6 269
1J3 270
3J3 271
4J3 272
2J3 273
CW CW CW CW CW CW
PREFLOW SPOT START START PULSE BACKGROUND
TIME % PEAK
TIME CURRENT TIME FREQ.
CURRENT
CW CW CW
AC AFTER STICK
WAVE FLOW ARC
BALANCE TIME FORCE
AUTO
1J24 BALANCE
2J24 LED
CONTINUOUS
ON TIG START
VOLTS ON
OFF STICK OFF
AMPS OFF
S15 S11 S14 S18 S13 S12
SPOT MODE DISPLAY METER START HIGH PULSE
START CURRENT DISPLAY CURRENT FREQ.
*
HIGH FREQ.
305 8J601
4P602 4J701
ARC ESTAB. *
306 7J601
5J701
5P602 *
START
307 6J601
EP602 EJ701
*
PEAK
308 5J601 (OPTIONAL)
DP602 * DJ701
BACKGROUND
309 1J601
1P602 1J701
*
CRATER FILL
310 2J601
6P602 6J701
(+)15 V
311 4J601 CJ701
CP602
312 3J601
3P602 3J701
TS701
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTriCaL DiaGramS
L8 THERMOSTAT
TOROID
BRIDGE TOROID
BACKGROUND RECTIFIER (‐)
214A
MAIN RECTIFIER AC
G1 216A
SCR4 GATE
G4
G2
B.G. TRANSISTOR
G3 214
B.G. TRANSISTOR
G4 215A
SCR1 GATE
R7 215
G1
MAIN RECTIFIER (‐)
216 220
100/25 SCR2 GATE
217 G2
218 219
MAIN RECTIFIER (+)
218A
SCR3 GATE
G3
MAIN RECTIFIER AC
217A
CR3
T5
AC OCV BOOST
7J17 256 258
CR2
265 6J15
115V CR2
DC OCV BOOST
6J17 255 257 CR3
266 7J15
232
115 VAC
B CONTROL TRANSFORMER
DC MODE
B
6J18 223
24 VAC
204C
AC RELAY
267 5J15
DC RELAY
268 4J15
115 VAC TO TRIAC CIRCUITS POT HI
269 1J15 4J18 201 2J23
115 V TO HIGH FREQ
270 10J1
115 V TO VALVE(S) POT WIPER
271 2J15 8J18 202
3J23
INTERLOCK
272 9J15
INTERLOCK POT LO u
7J18
273 8J15 203 4J23
24 VAC OUT
7J23
B 1J16
ELECTRODE SENSE 24 VAC OUT
204
2J16 1J18 8J23
REMOTE ARC START 24 VAC REMOTE
5J18 207 5J23
3J16
ARC START
REMOTE POT HI
5J16
REMOTE POT WIPER
6J16
REMOTE POT LO
7J16
DC MODE 24 VAC
8J16
ELECTRODE
SENSE
8J17 225
INTERLOCK
3J17 241
INTERLOCK
2J17 242
SHUNT (+)
222
SHUNT (‐)
221
L6
SHUNT TOROID
CW CW CW
PULSE CRATER CRATER
% PEAK
% ON FADE OUT
115V HF
CURRENT
4J17 228
115V
10J17 232
GAS
SOLENOID
115V GAS
1J17 229
( & WATER )
CONTROL
233
9J17
115V
TRIAC 115V
5J17 234
CHASSIS
ON ON 4 STEP
OFF OFF 2 STEP
S16 S17 S19
CRATER 2 STEP/4 STEP
FILL
115 VAC
RECEPTACLE
C7
.22/400V
PRIMARY
TRANSFORMER
THERMOSTAT
‐ BACKGROUND X5
RECTIFIER
+
X6
OCV BOOST X1
RECTIFIER
Q1
X7
SCR1
SCR4
+ ‐
BACKGROUND TRANSISTOR
‐ + X2
MAIN
RECTIFIER
D1
SCR3
150 /400
SCR2
D2
R3 CR2
10/ 400
8/ 100
CR3
OUTPUT
L3
INDUCTOR
DC
AC
DC AC
REMOTE
RECEPTACLE
S1A
4J22 A U
AC AC
REMOTE
‐ + + ‐
CURRENT DC DC DC
B N 10K DC
1J22
CONTROL
2J22 C R
POLARITY
SWITCH
3J22 D B
REMOTE
50/ 100
S1
ARC START CLOSED
6J22 E W SWITCH
IN DC
R1
F NO CONNECTION
C1
TM R2
OPTIONAL REMOTE AMPTROL
4/ 220
AND ARC START SWITCH
25/ 25
241
242
SHUNT
400A/50mV
259 263
L2
L1
RF CHOKE RF CHOKE
C3
HIGH
.0025/10KV 261 262
VOLTAGE
15/ 220
TRANSFORMER
CW
C6 L4
R4
3/ 25
R6
SPARK
150/ 100 GAP
T4
L5
T3 HIGH FREQ.
TRANSFORMER
WATER
SV1 SV2
SOLENOID
ELECTRODE WORK
0.5 A
F1
F2
1.5 A
CB1 X3
115V/15A
FAN FAN
X4
C8
.22/400V
G-3
MAIN
T1 C9 C10
RECONNECT
PANEL
H4 .0047/
CR1
3KV
L2
H3
}
H2
CR1
L1
H1
RECONNECT
PANEL
POWER
FACTOR
CORR.
H1 H2 H3 H4
PILOT
T2
TRANSFORMER
250
X1 X2
SEE NOTE A
SECONDARY
THERMOSTAT
STOP
POWER START/
STOP PUSHBUTTON
START
CR1 PL1
S2
CR1
INTERLOCK
NOTE A: LEAD #250 FROM POWER FACTOR CAPACITORS CONNECTS AS
FOLLOWS, DEPENDING ON THE HIGHEST NAMEPLATE INPUT VOLTAGE:
HIGHEST NAMEPLATE
INPUT VOLTAGE:
LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
440 THRU 460 RECONNECT PANEL, ALONG WITH CORRECT LEAD
FROM MAIN TRANSFORMER (T1)
480 AND HIGHER
LEAD #250 CONNECTS TO H5 LEAD OF
AND
MAIN TRANSFORMER
400 AND LOWER
*
‐DENOTES ACTIVE LOW LOGIC SIGNAL
CW‐DENOTES CLOCKWISE POSITION WHEN VIEWED FROM FRONT OF POTENTIOMETERS.
ALL LOGIC IS 15V UNLESS OTHERWISE SPECIFIED.
ELECTRICAL SYMBOLS PER E1537
COMPONENT VALUES:
CAPACITORS = MFD/VOLTS
RESISTORS = OHMS/WATTS
DIODES = AMPS/VOLTS
LEAD COLOR CODING
B=BLACK U=BLUE
N=BROWN W=WHITE
R=RED Y=YELLOW
CONNECTOR PIN NUMBERS:
EXAMPLE: THIS PIN IN
CONNECTOR J102
1 2 1 2 3 8
IS "6J102"
9 16
LATCH
VIEW OF CONNECTOR ON PC BOARD
5‐14‐93F
EQUIP. SQUARE WAVE TIG 355
THE LINCOLN ELECTRIC CO.
TYPE
CLEVELAND, OHIO U.S.A.
MACHINE SCHEMATIC
SUBJECT
SCALE NONE G
SHT. 2522
JJJ 4‐2‐92 G2113
DR DATE CHK REF. SUP'S'D'G NO.
SQUarE WaVE TiG 355