Lincoln Electric PRECISION TIG 375 Service Manual page 119

G-7
SCHEMATIC - ENTIRE MACHINE - BELOW CODE 11000 (G4075)
IN(-)
1 1
306
2 2
303
3 3
IN(+)
METER
4 4
205mV BETWEEN
5 5
IN(+) & IN(-) IS
6
6
205A OR 20.5V
(VIEWED FROM REAR)
CW
MAX
R1
OUTPUT
10K
CW CW
MIN
R4
OUTPUT
10K
313B
311A
BALANCE
313C
REMOTE
317
LOCAL
316
316A
(SHOWN IN REMOTE) POST FLOW
MIN A
321
A
316C
VOLT STICK
315
DISPLAY SWITCH
CONTROL PANEL
STICK REMOTE
AUTO BALANCE
(RED) (GREEN)
(GREEN)
W B W B
B
331 332
LED LIGHTS
FREQUENCY
ON TIME
401C 401D
CW CW
402
10K 10K
403
401A
ON
4-STEP
OFF
2-STEP
PULSE TRIGGER
(SHOWN PULSE ON) (SHOWN IN 2-STEP)
ADVANCED CONTROL PANEL (OPTIONAL ON PT275)
REMOTE
RECEPTACLE
4J22
U A
10K N B 1J22
2J22
R C
B 3J22
D
W E 6J22
F 5J22
PROTECTION
TOROID
PCB
TM
OPTIONAL AMPTROL REMOTE
(SCHEMATIC M16115)
CONTROL AND ARC START SWITCH
TOROID
301 +5V 1J8
302 DECIMAL PT. IN 2J8
303 IN (+) 3J8
301 304 COM 4J8
304B
304A DECMAL PT.OUT
5J8
306 IN (-)
6J8
304B
302
TOROID
311 +10V 1J9
312 2J9
PRESET (0 - 10V)
314 +1.5V 4J9
320 MIN OUTPUT (0 - 1.5V) 10J9
BALANCE (0 - 10V)
322 12J9
316 +15V 6J9
317 REMOTE (+15V) 7J9
318 POSTFLOW (0 - 15V) 8J9
321
DISPLAY MIN A (+15V) 11J9
315
DISPLAY VOLT (+15V) 5J9
CW CW
R2
319 STICK (+15V) 9J9
313 COM 3J9
10K
CW CW
R3
10K
313A 313
TIG
319
MODE SWITCH
B
331 6J10
(SHOWN IN STICK)
W
331 1J10
B
332 7J10
THERMAL W
GAS 2J10
332
(GREEN) (YELLOW) B
8J10
333
W 3J10
333
B
334 9J10
B W B W
W
W
334 4J10
B
335 10J10
333 334 335
W
335 5J10
TOROID
DOWN SLOPE
CW
ADVANCED CONTROL
405 407 PCB
10K (SCHEMATIC G4039-X)
(OPTIONAL ON PT275)
406 TOROID
J2
2J1
402 FREQ. (.08 - 15V)
403 3J1
BACK GROUND
405 ON TIME (1-15V) 5J1
406 6J1
408
7J1
407 DOWNSLOPE
B
8J1
CW 9J1
10J1
W 409
404 PULSE ON (15V) 4J1
10K 401 +15V 1J1
PULSE 411 2-STEP (15V) 11J1
410
W PULSE LED 12J1
(GREEN)
HOT START TRIMMER
ARC FORCE TRIMMER
2J5A
3J5A
J3 1
4J5A 2 3 4
5J5A
MOVE THIS PLUG FROM
7J5A
J5 TO J5A FOR ROBOTIC INTERFACE
1J5A
6J5A
8J5A WHEN ADVANCED CONTROL
PCB IS NOT INSTALLED
DISCONNECT FOR
MAX A 2J5
2J23
DOUBLE PRE/POST FLOW
WIPER B 3J5
3J23
4J23
MIN C 4J5
5J5
5J23 D
7J23 E 7J5
F 1J5
1J23
6J5
TOROID
8J5
CONTROL PCB
( SCHEMATIC G3908-X)
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS
TOROID
SCR1 GATE G1
1J4
SCR2 GATE G2
5J4
G3
SCR3 GATE
2J4
G4
SCR4 GATE
4J4
218
SCR1,SCR2 CATHODE
9J4
217
SCR3 CATHODE
6J4
216
10J4 SCR4 CATHODE
220
7J4 SCR3,SCR4 ANODE
3J4
X
8J4
X
TOROID
1J6
SHUNT (+) W 221
R 222
2J6 SHUNT (-)
TOROID
6J11 MICRO SWITCH ON POLARITY SWITCH 265
12J11 MICRO SWITCH ON POLARITY SWITCH 266
1J11 VOLT FEEDBACK, ELECTRODE 252
9J11 VOLT FEEDBACK, WORK 253
STICK OCV BOOST CIRCUIT,
PRESENT ONLY ON PRECISION TIG 375
TOROID
224
1J12 115VAC IN AC STICK 256
225 225A
5J12 115VAC IN DC STICK
255 CR3
CR2 CR3 OCV BOOST
RECTIFIER
CR2
257 258
8/300
DC AC
CR2 R14
CR3
BOOST BOOST
226
227A
231C
CR3
231B
TOROID
271
3J11 BACKGND FILTER CAP., POS
BACKGND RESISTOR
11J11
BACKGND FILTER CAP., NEG
271A
10J11 BACKGND AC OUT (63.5VAC) IN DC TIG
2J11 BACKGND AC IN (63.5VAC)
268
1J7 DC TIG BACKGROUND
220A
220C
CIRCUIT
3J7
220B 269
2J7
PT375 ONLY
5J7
BACKGND RECTIFIER
4J7
6J7
HIGH VOLTAGE
TRANSFORMER
T2
TOROID
200/100
6J12 HI-FREQ (115VAC) 236 L2
R5
237
3J12 GAS (115VAC) 235
236B
S
115VAC IN
4J12 233A
C7 12.5 OHM TYP.
15/250
2J12 FAN (115VAC) 260
5.5 OHMS
14.5 KOHMS
TYP.
TYP.
12.5 OHM TYP.
F L3
HI-FREQ CIRCUIT
GAS
SOLENOID
(115VAC)
235 SV1 231A
233A
PRECISION
231F
TIG 375 ONLY
TOP FAN
FAN FAN
(115VAC)
TOROID
260
262 260A
5J11 COOLER, +12VDC IN TIG WELDING
13J11 COOLER, COMMON 263
PRECISION TIG 275 ONLY
14J11 TSTAT 214 212
4J11 TSTAT
8J11 209 X7 213 215
20VAC
16J11 CONTROL BOARD SUPPLY X8
210
T1
PRIMARY TSTAT SECONDARY TSTAT
7J11 201 X9
20VAC (OF MAIN TRANSFORMER T1)
TRIGGER CIRCUIT
15J11 X10
204
AUX. WINDINGS OF
MAIN TRANSFORMER T1
216
G4
G1
SCR4 SCR1
G2
- +
220 MAIN
RECTIFIER
220A
D1
FREE WHEELING DIODE
SCR3 SCR2
G3
217
218
MAIN
TRANSFORMER
R 222(-) SHUNT T1
W 221(+)
400A/200mV
PT375 ONLY
OUTPUT
223 X1
L1
INDUCTOR
X13
X2
+
DC +
DC
228 AC AC
DC - DC -
AC
AC
265 -
+ - +
DC DC DC
DC
CLOSED
IN DC
N.C.
266
POLARITY
SWITCH
252
253
S2
BYPASS/STABILIZER
PCB
R7 286
(SCHEMATIC S22530)
20/100 D2
BACKGND DIODE
267 X5
5/50
63.5V
267
R8
X6
268
BACKGND TRIAC
CURRENT LIMITING RESISTOR
HOLDING RESISTOR
R1
50/100
HI-FREQ INTENSITY
WORK
R13 FRONT
ELECTRODE
3/25
(STICK WELDING)
PRESENT ONLY ON
238
PRECISION TIG 375
C6
.0015/12KV
HIGH FREQ.
SPARK
GAP TRANSFORMER
T3
239
REAR
ELECTRODE
233A
(TIG WELDING)
CB1
115 V
115V/15A
RECEPTACLE
(TOP)
233 232
COOLER RELAY
X3
(12VDC)
233B
262
COOLER
115VAC
RECEPTACLE
CR4
(BOTTOM)
X4 T1
BOTTOM FAN
231
234
(115VAC)
263
C8 C9
105VAC
PLUGGED TO
.22/400V .22/400V
COOLER RECEPTACLE CB2
X14
220V 2A
RECEPTACLE 220V/5A
OPTIONAL
WATER
SV2
50/60HZ MACHINES ONLY
SOLENOID
(115VAC) KIT
PRECISION TIG 375
ONLY
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OWNED BY LINCOLN GLOBAL, INC. AND MAY NOT BE DUPLICATED, COMMUNICATED
TO OTHER PARTIES OR USED FOR ANY PURPOSE WITHOUT THE EXPRESS WRITTEN PERMISSION OF LINCOLN GLOBAL, INC.
PROPRIETARY & CONFIDENTIAL: "X" INFO Chg. Sheet No.
UNLESS OTHERWISE SPECIFIED TOLERANCE
DESIGN INFORMATION
MANUFACTURING TOLERANCE PER E2056 XB-UF
3-8-2002A
ON 2 PLACE DECIMALS IS ± .02
DRAWN BY:
ON 3 PLACE DECIMALS IS ± .002
ON ALL ANGLES IS ± .5 OF A DEGREE TN
ENGINEER:
MATERIAL TOLERANCE (" ") TO AGREE t
WITH PUBLISHED STANDARDS.
TN
DO NOT SCALE THIS DRAWING
APPROVED:
G-7
50HZ MACHINE ONLY
BYPASS ASSEMBLY
C4
50/60HZ MACHINE ONLY
.0047/ 3KV
H5
H4 HIGH POWER SWITCH
C5
MID
H3
L1
H2 LOW
L2A
BYPASS PCB
RECONNECT
PANEL
SCHE. S24206-X
L1A
H1
L2
MICRO SWITCH
N.O.
H1
212
C1 C2 C3
PRECISION TIG 375
ONLY
POWER FACTOR
CAPACITORS
250
SEE NOTE A
PT375: STANDARD, C1=C2=C3=60/460
PT275: OPTIONAL, C1=C2=50/460
C3 NOT PRESENT
T1
NOTE A:
LEAD #250 FROM POWER FACTOR CAPACITORS
CONNECTS ACCORDING TO THE INPUT VOLTAGE
208/230/460
LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
RECONNECT PANEL, ALONG WITH CORRECT LEAD
FROM MAIN TRANSFORMER (T1)
220/380/415
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 CORRECT
LEAD FROM THE MAIN TRANSFORMER (T1)
460/575
LEAD #250 CONNECTS TO THE "LOW" TERMINAL
ON THE RECONNECT PANEL, ALONG WITH CORRECT
LEAD FROM THE MAIN TRANSFORMER (T1)
ELECTRICAL SYMBOLS PER E1537
COMPONENT VALUE
LEAD COLORING CODE:
UNITS:
B-BLACK
G-GREEN
CAPACITORS:
O-ORANGE
MFD/VOLTS
R-RED
U-BLUE
RESISTORS:
W-WHITE
OHMS/WATTS
Y-YELLOW
CONNECTOR PIN NUMBERS:
EXAMPLE: THIS PIN IN
CONNECTOR J11 IS "6J11"
1 2 3 8
9 16
LATCH
VIEW OF CONNECTOR ON PC BOARD
PRECISION TIG
EQUIPMENT TYPE:
REFERENCE:
MACHINE SCHEMATIC
SUBJECT:
SUPERSEDING: NONE 01-29-02
SCALE: DATE: DRAWING No.:
G
4075
PRECISION TIG 375