Lincoln Electric LN-25 SVM179-B Service Manual page 95

G-17
sChEmaTiC - lN-25 prO CONTrOl pC BOarD - CODEs 11387, 11388, 11507, 11508 (G4745-1) pG 4
ElECTriCal DiaGrams
+15V
2
D50
0.2A
3
30V
1
-15V
ELECTRODE R180 R175 R176 R177
221K 221K 221K 221K
2
X6
1
33074ADT
3
GND
WORK R174 R173 R179 R178
221K 221K 221K 221K
+15V
2
D14
3
0.2A
6
30V
X6
7
1
33074ADT
5
GND
-15V
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
+5V
2
D18
3 0.2A
30V
1
GND
1
D51
3
0.2A R184 POLARITY_SENSE
70V
2.21K
R182
C70
2
3.32K 221K
0.1uF
50V
GND
R170 METER_COMP
20K
0.1W
+15V
1
2
D52
3
0.2A R172
9 D19
70V
10K
X6 3 0.2A
R183 8
C71 0.1W
2 30V
475
3.32K 0.1uF 33074ADT
10
50V 1
-15V
GND
PROPRIETARY & CONFIDENTIAL:
SINCE COMPONENTS OR CIRCUITRY ON A
WITHOUT AFFECTING THE INTERCHANGE-
COMPONENTS OR CIRCUITRY OF CONTROLS
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
.022/50V
CAPACITORS = MFD ( UNLESS OTHERWISE SPECIFIED)
RESISTORS = Ohms ( 1/4W UNLESS OTHERWISE SPECIFIED)
1A,400V
DIODES = (UNLESS OTHERWISE SPECIFIED)
ARC VOLTS READ
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.
EQUIPMENT TYPE: FLEXIBLE POWER FEEDER
DESIGN INFORMATION
PRINTED CIRCUIT BOARD MAY CHANGE
DRAWN BY: JPZ 9/24/2009
SUBJECT:
SCHEMATIC, CONTROL PCB
ABILITY OF A COMPLETE BOARD, THIS
DIAGRAM MAY NOT SHOW THE EXACT ENGINEER: JPZ REFERENCE:
MATERIAL NA APPROVAL PROJECT
--------- 9-12-2008
APPROVED:
DISPOSITION: DATE: NUMBER:
HAVING A COMMON CODE NUMBER.
G-17
LAST NO. USED
R- _
SEE PAGE 1
_
C-
_
LABELS D-
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
PAGE 04 OF 05
DOCUMENT DOCUMENT
NUMBER: REVISION:
4745-1H0 A
G
CRM39801
lN-25™ prO