Lincoln Electric LN-25 PRO DUAL POWER Service Manual page 96

G-4
SchEmaTic - cOmplETE machiNE - (G6333) pG2
ENGINEERING CONTROLLED
MANUFACTURER:
(OPTIONAL)
SCHEMATIC =
CHANGE DETAIL: MISC. UPDATES PER SERVICE DEPARTMENT REQUEST AND ADDED BYPASS CAPACITOR ASSEMBLY
No
TIMER P. C. BOARD CIRCUIT
Timer Board Summary
Has potentiometers for burnback, postflow and preflow.
Preflow range is 0 to 10 sec.
Burnback range is 0 to 0.25 sec.
Postflow range is 0.25 to 10 sec.
Receives "Gas Flow Enable" signal.
Outputs 100 msec pulses to turn Gas Flow On, Gas Flow Off.
(LOCATED BEHIND WIRE
REEL COVER)
(LOCATED ON CASE FRONT)
ADJUST KNOB
ADJUST KNOB
ADJUST KNOB
+5V +5V +5V +5V +5V
CW= +5
10K
CCW= 0V
10K 10K BURNBACK
POT.
POSTFLOW PREFLOW
POT. POT.
COM COM
15V SIGNAL
15 ms PULSES
OUTPUT
TOGGLE GAS FLOW
ON/OFF
5V
TIMER KIT
MICROCONTROLLER
5V SIGNAL
GAS FLOW
ENABLE
J60-8
J60-7 J60-6 J60-5 J60-4
M21341
607 606A
608 605 4B
TO CONTROL BD. (VIA P60 plug)
BY-PASS CAPACITOR ASSEMBLY
4B
4B
2B
2B
67G
67H
GB
21G
21G
75E 75E
76E 76E
77E 77E
41B 41B
42B 42B
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ElEcTrical DiaGramS
LN-25 PRO
DISPLAYS WIRE FEED SPEED
ONLY ON THIS UNIT.
NOT USED ON THIS
VERSION OF UNIT
MAY BE PRESENT ON SOME
MODELS. IF UNIT IS EXPERENCING
UNSTABLE OUTPUT FROM
77B
POWER SOURCE THESE CAN BE
REMOVED AND UPDATE BYPASS
CAPACITOR ASSEMBLY. TO POWER 76B
SOURCE
75B
667B
767
21 AND 67 LEAD
DISCONNECT
721
621B
COM
ELECTRODE 67
15V ARC VOLTAGE
MEASUREMENT
21D
FOR DISPLAY
WORK 821
COM
WORK A
WORK CLIP
J60-3 J60-2 J60-1
805
804
ARC CURRENT
MEASUREMENT 801
NOT
601
509B
USED
802
CONTROL CABLE 41B
INPUT POWER
DETECTION
42B
(<18 VAC TO DETECT)
RED A
FAN
BLACK A
THE FAN TURNS OFF DURING
LOW VOLTAGE CONDITIONS
(LESS THAN 16 VOLTS) TO
CONSERVE POWER.
PRESET P. C. BOARD CIRCUIT
SCHEMATIC = G4748
(LOCATED ON CASE FRONT)
MOTOR
LED DISPLAY DIMS DURING LOW POWER CONDITIONS.
THERMAL
3 LEDs
WFS/AMPS DISPLAY
7 SEGMENT VOLTS DISPLAY
J10-10
DISPLAYS
(2 each)
SHOWS ACTUAL VOLTAGE ONLY (NO PRESET)
A (MINUS) "-" SHOWN HERE INDICATES NEGATIVE POLARITY.
J10-11
WFS AMPS VOLTS
set=WFS
SIGNALS TO
actual = AMPS
DISPLAY & LED
SOME LEDS ARE NOT VISIBLE
J10-16
+
AND NOT USED ON THIS MODEL.
SERIAL SPI
- COMMUNICATION AND
VOLTAGE
J10-14
MEASUREMENT SUPPLY TO BOARD
TO J1
OF REMOTE
SPI (10 leads)
VOLTS CONTROL
-
J10-15
POTENTIOMETER
MICROCONTROLLER
PC BOARD
+
J9-1
J9-2
SETUP
J9-3
PUSHBUTTON
J9-4
J10-6
ARC VOLTAGE
FEEDBACK
J10-8
J12-3
J12-6
+15V
-15V
J10-9
J10-4
J10-1
ARC CURRENT
J10-12 708A
ARC ESTABLISHED OUTPUT
FEEDBACK
J10-2 IF V> 10V RELATIVE TO COMMON
+4V = +500A 0V= ARC NOT ESTABLISHED
TO CONTROL BOARD
COM -4V = -500A
(VIA P7)
J12-1
J12-4
-15V J6-8 707A
FROM CONTROL BOARD
(VIA P7)
+5V
J10-5
J10-7
COM
THIS BOARD DETECTS 42 V. TYPE INPUTS
OR FOR ACROSS THE ARC TYPE INPUT
POWER VIA J12-1, J12-4 INPUT AS INDICATED.
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OWNED BY LINCOLN GLOBAL, INC. AND MAY NOT BE DUPLICATED, COMMUNICATED
PROPRIETARY & CONFIDENTIAL:
TO OTHER PARTIES OR USED FOR ANY PURPOSE WITHOUT THE EXPRESS WRITTEN PERMISSION OF LINCOLN GLOBAL, INC.
MANUFACTURING TOLERANCE PER E2056
SCALE:
CONTROL: CLEVELAND EQUIPMENT TYPE:
UNLESS OTHERWISE SPECIFIED TOLERANCE:
ON 2 PLACE DECIMALS IS ± .02 in. ( ± 0.5 mm) NONE
ON 3 PLACE DECIMALS IS ± .002 in. ( ± 0.05 mm) DRAWN BY: tpearn
IF PRINTED SUBJECT:
ON ALL ANGLES IS ± .5 OF A DEGREE
@ A1 SIZE
MATERIAL TOLERANCE (" ") TO AGREE t ENGINEER: E. ENYEDY
WITH PUBLISHED STANDARDS. UNITS: MATERIAL
UF
DO NOT SCALE THIS DRAWING APPROVED: DRS INCH DISPOSITION:
G-4
Setup Pushbutton (Board mounted)
Access with paperclip through .09 hole in nameplate
Setup Menu:
Pushbutton
Select units
in/min or m/min
(rotate WFS knob)
Pushbutton
Select run-in
On or Off
(rotate WFS knob)
Pushbutton
Set WFS Calibration
.095 to 1.05
Actual WFS / Set WFS = Calibration
(rotate WFS knob)
Factor
Pushbutton
LN-25 PRO DUAL POWER 2 2
PAGE ___ OF ___
DOCUMENT DOCUMENT
MACHINE SCHEMATIC
REVISION:
NUMBER:
G6333
B
APPROVAL PROJECT REFERENCE:
11-20-2009 CRM42139
G5683-1
DATE: NUMBER:
Insight
lN-25™ prO DUal pOWEr