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ELECTRICAL DIAGRAMS
G-8
PRECISION TIG 275
®®
SCHEMATIC - ENTIRE MACHINE - ABOVE CODE 11000 (G5691)
EN-170
S
O
L
ID
E
D
G
E
ENGINEERING CONTROLLED
MANUFACTURER:
No
RELEASED FROM X A.02
G5691
PRECISION TIG
MACHINE SCHEMATIC
NONE
G4075
bburkhart
burkhart
-
DRAWN BY:
DESIGN INFORMATION
ENGINEER:
APPROVED:
REFERENCE:
EQUIPMENT TYPE:
SUBJECT:
SCALE:
MATERIAL
DISPOSITION:
APPROVAL
DATE:
PROJECT
NUMBER:
NA CRM38261
1
PAGE ___ OF ___
1
DOCUMENT
NUMBER:
DOCUMENT
REVISION:
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:
A
THE INFORMATION ON THIS
PRINT IS FOR REFERENCE
ONLY. COMPONENTS AND
CIRCUITRY MAY BE DIFFERENT
FROM AN ACTUAL MACHINE.
7-27-2007
CHANGE DETAIL:
IF PRINTED
@ A1 SIZE
UNITS:
NONE
G5691
LEAD COLOR CODE:
B-BLACK OR GRAY
G-GREEN
O-ORANGE
R-RED OR PINK
U-BLUE
W-WHITE
Y-YELLOW
COMPONENT VALUE UNITS:
CAPACITOR: MFD/VOLTS
RESISTOR: OHMS/WATTS
CONNECTOR PIN NUMBERS:
VIEW OF CONNECTOR ON PC BOARD
1
2
6
712
LATCH
EX. 12 PIN CONNECTOR
LABELS:
COMMON
FRAME GROUND
EARTH GROUND
SCR4
SCR1
SCR3
SCR2
MAIN
RECTIFIER
D1
OUTPUT
INDUCTOR
AC
DC
DC
DC
DC
AC
AC
AC
++
-
-
RECEPTACLE
R1
POLARITY
SWITCH
SHUNT
FRONT
WORK
SV1
GAS
SOLENOID
CB1
115V/15A
FAN
X3
X4
250
SEE NOTE A
MAIN
TRANSFORMER
RECONNECT
PANEL
X2
X1
H1
H2
H3
H4
L2
L1
ELECTRICAL SYMBOLS PER E1537
+
-
TM
CLOSED
IN DC
REMOTE
HIGH FREQ.
TRANSFORMER
115 V
RECEPTACLE
3KV
.0047/
400A/200mV
S2
50/100W
OPTIONAL AMPTROL REMOTE
CONTROL AND ARC START SWITCH
T2
S
F
C6
.0015/
12KV
50/60HZ MACHINES ONLY
C4
C5
C1 C3
SPARK
GAP
R5
200/100W
LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
FROM MAIN TRANSFORMER (T1)
RECONNECT PANEL, ALONG WITH CORRECT LEAD
208/230/460
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)
NOTE A:
CONNECTS ACCORDING TO THE INPUT VOLTAGE
LEAD #250 FROM POWER FACTOR CAPACITORS
C7
15/250V
220V 2A
RECEPTACLE
CB2
220V/5A
H5
HIGH
VOLTAGE
TRANSFORMER
H1
220/380/415
L1
L2
L3
C2
T3
240
238A
PRESENT ONLY ON
PRECISION TIG 375
R13
HI-FREQ INTENSITY
REAR
ELECTRODE
(STICK WELDING)
(TIG WELDING)
HOLDING RESISTOR
COOLER
RECEPTACLE
(BOTTOM of plug)
(TOP of plug)
231A
231B
231A
231D
FAN
2
3
1
E
231F
260A
PRECISION
TIG 375 ONLY
X13
R14
CR2
C8
C9
.22/400V
.22/400V
CR4
233B
234
(12VDC)
COOLER RELAY
233
232
231
236B
237
238
239
225A 228
DC
+
DC
-
DC
+
DC
-
224
CR3
226
227A
CR3
223
227
225
CR2
CR3
258
256
257
CR3
CR2
255
231C
AC & DC STICK OCV BOOST CIRCUIT,
PRESENT ONLY ON PRECISION TIG 375
OCV BOOST
RECTIFIER
AC
BOOST
DC
BOOST
2
7
1
A
229
229A
268
R8B
R7D
BACKGROUND CIRCUIT
ENABLED IN BOTH TIG
& STICK, AC & DC
X5
X6
63.5V
269
270
BACKGND AC IN
271
1J4
5J4
G1
G2
G3
G4
218
217
216
220
SCR1,SCR2 CATHODE
SCR3 CATHODE
SCR4 CATHODE
SCR3,SCR4 ANODE
SCR1 GATE
SCR2 GATE
SCR3 GATE
SCR4 GATE
216
G4
G1
G2
G3
220
217
218
1J12
5J12
115VAC IN
AC STICK
115VAC IN
DC STICK
2J4
4J4
9J4
6J4
10J4
7J4
BACKGND AC OUT
BACKGND FILTER CAP., POS
BACKGND FILTER CAP., NEG
3J11
11J11
2J11
10J11
BACKGND
RECTIFIER
X14
231B
231E
236
TOROID
TOROID
HI-FREQ (115VAC)
GAS (115VAC)
FAN (115VAC)
235
260
265
266
252
253
MICRO SWITCH ON POLARITY SWITCH
VOLT FEEDBACK, ELECTRODE
VOLT FEEDBACK, WORK
265
266
252
253
MICRO SWITCH ON POLARITY SWITCH
TOROID
6J11
12J11
1J11
9J11
POWER SWITCH
MICRO SWITCH
215
212
212
215
PRECISION TIG 375
ONLY
PRECISION TIG 375
ONLY
PRECISION TIG 275 ONLY
262
263
214
213
TSTAT
TSTAT
COOLER, +12VDC IN TIG WELDING
COOLER, COMMON
262
263
5J11
13J11
4J11
14J11
TOROID
233A
235
233A
260
233A
115VAC IN
6J12
3J12
2J12
4J12
TOROID
X7
X8
X9
X10
20VAC
CONTROL BOARD SUPPLY
20VAC
TRIGGER CIRCUIT
8J11
16J11
7J11
15J11
209
210
201
204
AUX. WINDINGS OF
MAIN TRANSFORMER T1
PRIMARY TSTAT
SECONDARY TSTAT
(OF MAIN TRANSFORMER T1)
3J4
8J4
X
X
TOROID
R 222(-)
W 221(+)
W 221
R 222
SHUNT (+)
SHUNT (-)
1J6
2J6
TOROID
1J13
2J13
3J13
4J13
5J13
6J13
343
344
345
346
TOROID
4
3
2
1
344
345
343
METER
R1
311
312
313
+10V
COM
PRESET (0 - 10V)
1J9
2J9
3J9
MAX
OUTPUT
CW
MIN
OUTPUT
CW
313B
314
320
MIN OUTPUT (0 - 1.5V)
+1.5V
R4
CW
CW
R2
CW
BALANCE
313C
311A
322
12J9
4J9
10J9
BALANCE (0 - 10V)
316
317
LOCAL
REMOTE
316
317
6J9
7J9
+15V
REMOTE (+15V)
CW
R3
CW
A
MIN A
VOLT
DISPLAY SWITCH
316B
316C
321
315
319
STICK
TIG
MODE SWITCH
316A
313A
321
315
319
318
11J9
5J9
9J9
8J9
STICK (+15V)
POSTFLOW (0 - 15V)
TOROID
STICK
AUTO BALANCE
REMOTE
(RED)
(GREEN)
(GREEN)
GAS
(GREEN)
THERMAL
(YELLOW)
B
W
B
W
B
W
B W
331
332
333
B
W
334
335
331
331
332
332
333
333
334
334
335
335
B
W
B
W
B
W
B
W
B
W
6J10
1J10
7J10
2J10
8J10
3J10
9J10
4J10
10J10
5J10
TOROID
LED LIGHTS
R9
CW
CW
R10
FREQUENCY
ON TIME
CW
R12
DOWN SLOPE
401C
401D
402
403
405
406
407
CW
R11
BACK GROUND
B
W
PULSE
OFF
TRIGGER
4-STEP
2-STEP
401B
404
401A
411
401
408
409
410
FREQ. (.08 - 15V)
402
403
405
406
407
PULSE
(GREEN)
ON TIME (1-15V)
DOWNSLOPE
2J1
3J1
5J1
6J1
7J1
404
401
411
W
PULSE ON (15V)
+15V
2-STEP (15V)
PULSE LED
8J1
9J1
10J1
4J1
1J1
11J1
12J1
TOROID
A
B
C
D
E
F
U
N
R
B
W
10K
PROTECTION
PCB
4J22
1J22
2J22
3J22
6J22
5J22
A
B
C
D
E
F
2J5
3J5
4J5
5J5
7J5
6J5
8J5
1J5
TOROID
TOROID
2J23
3J23
4J23
5J23
7J23
1J23
2J5A
3J5A
4J5A
5J5A
7J5A
1J5A
6J5A
8J5A
MOVE THIS PLUG FROM
J5 TO J5A FOR ROBOTIC INTERFACE
ADVANCED CONTROL
PCB
(OPTIONAL ON PT275)
J2
J3
1
23
4
WHEN ADVANCED CONTROL
PCB IS NOT INSTALLED
DISCONNECT FOR
DOUBLE PRE/POST FLOW
DIP SWITCH
(ADVANCED FEATURES
SELECTION)
HOT START TRIMMER
ARC FORCE TRIMMER
( SCHEMATIC G4762-X)
(SCHEMATIC G4760-X)
(SCHEMATIC S22530)
BYPASS/STABILIZER
PCB
(SCHEMATIC M16115)
ADVANCED CONTROL PANEL (OPTIONAL ON PT275)
1J7
3J7
2J7
5J7
4J7
6J7
PT375 use ONLY
CONTROL PCB
POST FLOW
8/300W
10K
10K
10K
10K
10K
10K
10K
10K
LOW
MID
HIGH
SV2
SOLENOID
OPTIONAL
WATER
PLUGGED TO
COOLER RECEPTACLE
(SHOWN IN REMOTE)
(SHOWN IN STICK)
DISPLAY VOLT (+15V)
DISPLAY MIN A (+15V)
313A
318
CONTROL PANEL
(SHOWN IN 2-STEP)
MAX
WIPER
MIN
PT375 ONLY
N.O.
N.C.
115VAC
105VAC
3/25W
(115VAC)
TOP FAN
BOTTOM FAN
(115VAC)
c.c. w
(115VAC)
c.w.
(115VAC)
5.5 OHMS
TYP.
14.5 KOHMS
TYP.
12.5 OHM TYP.
12.5 OHM TYP.
KIT
ELECTRODE
T1
T1
T1
T1
223
HI-FREQ CIRCUIT
460/575
LEAD #250 CONNECTS TO THE "LOW" TERMINAL
ON THE RECONNECT PANEL, ALONG WITH CORRECT
LEAD FROM THE MAIN TRANSFORMER (T1)
POWER FACTOR
CAPACITORS
PT375: STANDARD, C1=C2=C3=60/460V
PT275: OPTIONAL, C1=C2=50/460V
C3 NOT PRESENT
313
BYPASS PCB
L1A
L2A
50/60HZ MACHINE
ONLY
BYPASS ASSEMBLY
50HZ MACHINE ONLY
SCHE. S24206-X
7J13
8J13
347
J7
BOARD
347
MENU
SWITCH
S3
346
316D
316D
SPOT
413
B
W
SPOT
(RED)
W
413
1J20
2J20
R8A
216A
217A
R7C
2
1
8
B
375 ONLY
2
1
8
A
2
2
0
A
218A
220B
220B
220A
5/50W
5/50W
275 = 5/50W 4 ea
375 = 25/25W 4 ea
base front
75vac
(375 only)
Free Wheeling diode
left front lower
upper section near lift bale
.015"
near power switch
in reconnect area
in reconnect area
bottom right in RF section
PT375 = 86 vac
PT275 =75 vac
to X2
Fans "ON" @
15A in stick mode
2A in tig mode
"ON" 8 minutes after
weld stops
Meter shows
preset & actual
board mounted parts
+5 LED
+15 LED
Dip Switches select:
a.
re-start enable
b.ramp down to zero
c. see IM for details
and more.
d.most old options
on menu feature now.
Caliberation: see new control bd. instructions
exhaust
intake
inside side box right
min
min
min
flashes with
pulse frequency
stick
thermo
gas
remote
auto
right front lower
10 pin molex
10 pin molex
(right side)
(right front)
"ON" with input power sw.
"ON" with output
Sets weld tables
& CR2 ,CR3 control
right heat-sink
left heat-sink
very top of welder
front
middle section
outside of right side box
(bottom behind fan)
(right side in box)
(bottom right side)
upper left
5KV
K870 foot pedal jumper
to enable Pot (R1) max output
limiter fearure.
Jumper not used
in Robotic molex position J5A
center of base mounted on its side
To & From
IC chip
driver
opto
com
+12
com
+8
to thermo
led & CPU
either is ref
to 231A
Make sure that the rear EXTERNAL
baffle is inplace and not damaged.
TOP FAN
N.C.
N.C.
wounded into
primary
lead
mounted
turns off SCR's
OCV clamp
max current range:
375=340A
275=420A
min current range:
375=2 to 65A
275=2 to 55A
115V common
115V common
115V common
+5
GND
Data
Menu Switch
Clock
menu options( jumper IN)
no menu options ( jumper out)
J8 (6pin)
not used
Menu Switch hold to get to TIGoptions
lift TIG, upslope
tig hot start levels, micro start
pre flow/after flow time extended
see IM for details and more
Menu Switch hold to get to Stickoptions
arc force levels
hot start levels
Push & hold
at power up = defaults
not used:see
menu options
IC chip
controller
large cap and
resistor filter
opto
triac
opto
triac
opto
triac
opto
triac
opto
triac
IC chip
controller
1
1
5
v
a
c
opto
triac
R
7
B
R
7
A
2
3
0
275 ONLY
375 ONLY
current limiting resistors
to main rectifier
BACKGND
RESISTORS
115V common
115VAC
115VAC
SCR drive
ckts
&
snubbers
amp
scaling
R
(top rear)
G-8
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
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