Lincoln Electric IDEALARC DC-600 Service Manual page 118

G-8
sChEmaTiC - (CODEs 9773, 9775, 9776, 9778, 9779, 9780, 9781, 9782, 9910, 10282, 10283, 10410, 10411, 10412, 10413, 10414, 10416, 10417) (G2259)
L3
INPUT
POWER L2
L1
GROUND
VV
CVI
CVS
S4-A
CURRENT REED SW.
3CR
CLOSED WITH OUTPUT CURRENT
215
R1
75
76
S3
77
VV
CVI
80
CVS
81
S4-C
TS 3
VV
215
CVI
CVS
S4-B
ELECTriCaL DiaGrams
271 271A
N.A. ON 440/460V MACHINES, CR1 IS A DC
CONTACTOR AND D1 & TPI ARE ADDED
D1
- AS SHOWN.
+ TPI
272
272A
CR1
START
STOP
211 212 271
255
2CR
H3
N.A.
120VAC 1CR 1CR R
21
H2
H1 256 272
273
4
SECONDARY
PRIMARY
CONTROL
2
TRANSFORMER
THERMOSTATS
31
32
TS 2
10J1
280
256 255 215
224 +32V
7J1
+16V
POWER SUPPLY
-6.2V
13J1 -10V
220
SET POINT
CONTROL PCB
2J1
75
6J1
226
TO MAIN POWER
TRANSFORMER
FAULT DETECT.
5J2
238
1J1
229
4J1
80
5J1 CONTROL AMP
81 4J2
FIRING SIGNAL
231
VOLTAGE FEEDBACK
3J1 TO MAIN POWER
232 TRANSFORMER
9J1
222
235
SHUTDOWN
1J2
235
OVERLOAD DETECT.
CURRENT FEEDBACK
6J2
236
210 215
236
14J1 1J3 2J3
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
1CR 1CR
31
1 2
222
21
4 5
TO OUTPUT STUDS
210 203
7 TO 8
FIRING
S2 10 11
204 PCB
MAIN POWER
TRANSFORMER
4CR
31
FAN MOTOR
TO AUX. WINDING
F1 120VAC
32A
8A
OUTPUT
SCR1
SCR BRIDGE
C11
G1
G3
C17
C20
G2 C14
SCR2
1J5
216 FIRING BD. ENABLE
5J5
215
6J5
215
4J5 2J6 SCR1 & SCR2
204 GATE DRIVE
X
FIRING CIRCUIT G1
2J5 75 VAC
1J7
203
A
GATE DRIVE
231 A'
8J7 G2
3J5
SCR3 & SCR4
206 1J6
7J5 75 VAC Y FIRING CIRCUIT
GATE DRIVE
205
G3
2J7
B
231
GATE DRIVE
B'
5J7 G4
10J5
3J6
231 Z
8J5
6J7
208 GATE DRIVE
C
75 VAC G5
9J5 C'
207 5J7
SCR5 & SCR6
GATE DRIVE
FIRING CIRCUIT
G6
2CR
FIRING PCB
1CR
3 32A
6
205 OUTPUT CHOKE
207
TO 9 TO
FIRING FIRING
12
206 PCB PCB
208
222
TO S2
R2
1
C10
400
4CR
R10
216 214
SCR3 SCR5
4CR
C12 C13
210
G5 TO S2 4CR
SHUNT
C18 C19
215
C21 C22
215 210
50mV @ 800Amps
G4 C15 G6 C16
SCR4 SCR6
+ - + -
AMMETER VOLTMETER
ELECTRICAL SYMBOLS PER E1537.
CAPACITORS= MFD/VOLTS
(VIEWED FROM COMPONENT SIDE OF BOARD)
Ch'ge.Sht.No.
3-8-91N
1-17-92E
DR.
G-8
222
"-" OUTPUT STUD
.05
C7
1000
"+" OUTPUT STUD
210
GENERAL INFORMATION
J6 J4 J7
J3
1 1 2
3 4
2
J5
J2 J1
CONNECTOR CAVITY NUMBERING SEQUENCE
EQUIP.
DC-600
THE LINCOLN ELECTRIC CO.
TYPE
OPERATING SCHEMATIC
CLEVELAND, OHIO U.S.A.
SUBJECT
NONE REF. G1527-1
SCALE
SHT.
JJJ 12-9-91 2-28-91 G 2259
CHK. SUP'S'D'G.
DATE NO.
iDEaLarC ® DC-600