Control Pcb - Lincoln Electric PRECISION TIG 275 SVM162-B Service Manual

IN(-)
306 1 1 301
304B
303 2 2
IN(+) 3 3
304B
METER
4 4
205mV BETWEEN 302
5 5
IN(+) & IN(-) IS
6
6
205A OR 20.5V
(VIEWED FROM REAR)
TOROID
CW
MAX
R1
OUTPUT
10K
CW CW
MIN
R4
OUTPUT
10K
313B
311A CW CW
R2
BALANCE
10K
313C
REMOTE
317
LOCAL
316
316A
CW CW
(SHOWN IN REMOTE)
R3
POST FLOW
10K
313A 313
321
MIN A
A 316C
TIG
VOLT 315 STICK
319
MODE SWITCH
DISPLAY SWITCH
(SHOWN IN STICK)
CONTROL PANEL
THERMAL
STICK REMOTE GAS
AUTO BALANCE
(RED) (GREEN) (GREEN) (YELLOW)
(GREEN)
B W B W B
B W B W
333 334
331 332
LED LIGHTS
FREQUENCY
ON TIME DOWN SLOPE
401C 401D
CW CW CW
402 405 407
10K 10K
10K
403
406
BACK GROUND
408
401A
B
ON
4-STEP
CW
409
W
OFF
2-STEP
10K
PULSE
PULSE TRIGGER 410
(GREEN)
(SHOWN PULSE ON) (SHOWN IN 2-STEP)
ADVANCED CONTROL PANEL (OPTIONAL ON PT275)
MOVE THIS PLUG FROM
REMOTE J5 TO J5A FOR ROBOTIC INTERFACE
RECEPTACLE
U A 4J22
MAX
2J23
10K N B 1J22
WIPER
3J23
R C 2J22
4J23 MIN
B D 3J22
5J23
W E 6J22 7J23
1J23
F 5J22
PROTECTION
TOROID
PCB
TM
OPTIONAL AMPTROL REMOTE
(SCHEMATIC M16115)
CONTROL AND ARC START SWITCH
® ®
TOROID
TOROID
+5V
301 1J8 SCR1 GATE G1
1J4
DECIMAL PT. IN 2J8 SCR2 GATE
302 G2
5J4
IN (+)
303 3J8 SCR3 GATE G3
2J4
COM
304
4J8 SCR4 GATE G4
DECMAL PT.OUT 4J4
304A
5J8
SCR1,SCR2 CATHODE 218
306 IN (-) 9J4
6J8
SCR3 CATHODE 217
6J4
SCR4 CATHODE
10J4 216
SCR3,SCR4 ANODE
7J4 220
3J4
X
8J4
X
TOROID
SHUNT (+)
1J6 W 221
SHUNT (-)
2J6 R 222
TOROID
+10V
311 1J9
6J11 MICRO SWITCH ON POLARITY SWITCH
PRESET (0 - 10V)
312 2J9
12J11 MICRO SWITCH ON POLARITY SWITCH
1J11 VOLT FEEDBACK, ELECTRODE
+1.5V
314 4J9
VOLT FEEDBACK, WORK
MIN OUTPUT (0 - 1.5V) 9J11
320 10J9
BALANCE (0 - 10V)
322 12J9
+15V
316 6J9
REMOTE (+15V)
317 7J9
POSTFLOW (0 - 15V)
318 8J9
DISPLAY MIN A (+15V)
321 11J9
TOROID
315 DISPLAY VOLT (+15V)
5J9
115VAC IN AC STICK
1J12
STICK (+15V)
319 9J9
115VAC IN DC STICK
5J12 255
COM
313 3J9
CR2
DC
BOOST
TOROID
B 6J10 BACKGND FILTER CAP., POS
331 3J11
BACKGND FILTER CAP., NEG
11J11
W 1J10
331
BACKGND AC OUT (63.5VAC) IN DC TIG
10J11
B
7J10
332 BACKGND AC IN (63.5VAC)
2J11
W 2J10
332
B
8J10
333
W
3J10
333
1J7
B
334 9J10
W
3J7
W
334 4J10
2J7
PT375 ONLY
B
10J10 5J7
335
335
4J7
W
335 5J10
6J7
TOROID
TOROID
ADVANCED CONTROL HI-FREQ (115VAC)
6J12 236
PCB
GAS (115VAC)
3J12 235
(SCHEMATIC G4039-X)
115VAC IN
4J12 233A
(OPTIONAL ON PT275)
TOROID
FAN (115VAC)
2J12 260
J2
FREQ. (.08 - 15V)
402 2J1
403 3J1
ON TIME (1-15V)
5J1
405
406 6J1
DOWNSLOPE 7J1
407
8J1
9J1
10J1
PULSE ON (15V)
404 4J1
401 +15V 1J1
2-STEP (15V)
411 11J1
PULSE LED
W 12J1
HOT START TRIMMER
ARC FORCE TRIMMER
2J5A
3J5A
4J5A J3 1
2 3 4
5J5A
7J5A
1J5A
6J5A
WHEN ADVANCED CONTROL
8J5A TOROID
PCB IS NOT INSTALLED
5J11 COOLER, +12VDC IN TIG WELDING
DISCONNECT FOR
A 2J5
DOUBLE PRE/POST FLOW
13J11 COOLER, COMMON
B 3J5
C 4J5
14J11 TSTAT
5J5
D TSTAT
4J11
E 7J5
209
8J11
F 1J5 20VAC
CONTROL BOARD SUPPLY
16J11 210
6J5
TOROID
7J11 201
8J5
20VAC
TRIGGER CIRCUIT
15J11 204

CONTROL PCB

AUX. WINDINGS OF
( SCHEMATIC G3908-X) MAIN TRANSFORMER T1
This diagram is for reference only. It may not be accurate for all machines covered by this manual.
216
G4
G1 SCR4
G2
220 -
220A
D1
FREE WHEELING DIODE
SCR3
G3
217
218
R 222(-)
SHUNT
W 221(+) 400A/200mV
265
266
252
253 OUTPUT
L1
INDUCTOR
STICK OCV BOOST CIRCUIT,
PRESENT ONLY ON PRECISION TIG 375
224
256
225 225A 228
CR3
CR3 OCV BOOST
RECTIFIER
CR2
265 -
257 258 DC
CLOSED
IN DC
8/300 N.C.
AC
CR3 CR2
R14
BOOST
226
266
227A
231C
252
CR3
231B
271
BACKGND RESISTOR
R7
271A 286
20/100 D2
BACKGND DIODE
268
5/50
267
R8
DC TIG BACKGROUND
BACKGND TRIAC
220C 220A
CIRCUIT CURRENT LIMITING RESISTOR
220B 269
BACKGND RECTIFIER
HI-FREQ INTENSITY
R13
HIGH VOLTAGE
TRANSFORMER
3/25
T2
200/100 PRESENT ONLY ON
238
R5 L2 PRECISION TIG 375
C6
237
236B
S
12.5 OHM TYP.
C7 .0015/12KV
15/250
5.5 OHMS
14.5 KOHMS SPARK HIGH FREQ.
TYP.
TYP. GAP TRANSFORMER
12.5 OHM TYP.
L3
F
T3
HI-FREQ CIRCUIT
239
REAR
GAS
SOLENOID ELECTRODE
(115VAC)
(TIG WELDING)
235 SV1 231A
233A
COOLER RELAY
(12VDC)
233B
262
PRECISION
231F
TIG 375 ONLY
CR4
TOP FAN BOTTOM FAN
FAN
FAN (115VAC) 234
(115VAC)
263
260
260A C8
262
PLUGGED TO
.22/400V
COOLER RECEPTACLE
263
PRECISION TIG 275 ONLY
214 212
OPTIONAL
X7 213 215
SV2 WATER
50/60HZ MACHINES ONLY
SOLENOID
X8 (115VAC)
KIT
T1
SECONDARY TSTAT
X9 PRIMARY TSTAT
(OF MAIN TRANSFORMER T1)
PRECISION TIG 375
X10
ONLY
PROPRIETARY & CONFIDENTIAL:
UNLESS OTHERWISE SPECIFIED TOLERANCE
MANUFACTURING TOLERANCE PER E2056
ON 2 PLACE DECIMALS IS ± .02
ON 3 PLACE DECIMALS IS ± .002
ON ALL ANGLES IS ± .5 OF A DEGREE
MATERIAL TOLERANCE (" ") TO AGREE
WITH PUBLISHED STANDARDS.
DO NOT SCALE THIS DRAWING
SCR1
MAIN
+
RECTIFIER
SCR2
BYPASS ASSEMBLY
MAIN
TRANSFORMER
.0047/
T1
H5
POWER SWITCH
H4 HIGH
H3 MID
PT375 ONLY
X1 H2 LOW
223
L2A
RECONNECT
X13
PANEL
L1A
X2 H1
DC + +
DC
AC AC MICRO SWITCH
DC - DC -
N.O.
H1
212
AC
AC
+ - + C1 C2 C3 PRECISION TIG 375
DC
DC DC
ONLY
POWER FACTOR
CAPACITORS
POLARITY
250
SWITCH
SEE NOTE A
253 S2
PT375: STANDARD, C1=C2=C3=60/460
PT275: OPTIONAL, C1=C2=50/460
C3 NOT PRESENT
BYPASS/STABILIZER
PCB
(SCHEMATIC S22530)
X5
267
T1
63.5V
X6
268
HOLDING RESISTOR
R1
NOTE A:
50/100
LEAD #250 FROM POWER FACTOR CAPACITORS
CONNECTS ACCORDING TO THE INPUT VOLTAGE
WORK
FRONT
208/230/460
ELECTRODE
(STICK WELDING)
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
233A
ON THE RECONNECT PANEL, ALONG WITH CORRECT
LEAD FROM THE MAIN TRANSFORMER (T1)
CB1
115 V
115V/15A
RECEPTACLE ELECTRICAL SYMBOLS PER E1537
(TOP)
232
233
X3
LEAD COLORING CODE: COMPONENT VALUE
UNITS:
B-BLACK
COOLER
115VAC G-GREEN
RECEPTACLE
CAPACITORS:
(BOTTOM) O-ORANGE
X4
T1 R-RED
231
U-BLUE
RESISTORS:
W-WHITE
C9 Y-YELLOW
105VAC
.22/400V
CB2
X14
CONNECTOR PIN NUMBERS:
220V 2A
220V/5A EXAMPLE: THIS PIN IN
RECEPTACLE
CONNECTOR J11 IS "6J11"
1 2 3 8
9 16
LATCH
VIEW OF CONNECTOR ON PC BOARD
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.
DESIGN INFORMATION REFERENCE: EQUIPMENT TYPE: PRECISION TIG
"X" IN FO Chg . Sheet No.
XB-UF DRAWN BY:
3-8-2 0 02 A TN
SUBJECT: MACHINE SCHEMATIC
t ENGINEER: TN SUPERSEDING:
SCALE: NONE DATE: 01-29-02 DRAWING No.:
APPROVED:
50HZ MACHINE ONLY
C4
50/60HZ MACHINE ONLY
3KV
C5
L1
BYPASS PCB
SCHE. S24206-X
L2
MFD/VOLTS
OHMS/WATTS
G 4075