See figure f.11, J1 j3 j4 j2, Troubleshooting and repair – Lincoln Electric LN-25 SVM114-C User Manual
Page 59: Hall effect module test (continued), G3425, F-21, J2 j3 j1, J4 j14
TROUBLESHOOTING AND REPAIR
F-21
F-21
LN-25™
4. Apply at least 25 VDC but no more than 100
VDC to the LN-25™ from the electrode cable to
the work sensing lead. Observe polarity and set
polarity switch.
5. Check for the presence of 12 VDC from lead
512(+) to lead 500(-). If the 12 VDC is not
present or low, the control board may be faulty.
See Figure F.11or F.11.a.
6.Activate the LN-25™ trigger circuit, make sure the
d r i ve m o t o r i s r u n n i n g a n d c h e ck fo r t h e
presence of approximately 6.0 VDC from lead
555(+) to lead 500(-). The value of 6.0 VDC
represents the correct feedback voltage from
the hall effect device to the control board.
7. If the above voltage reading is not correct, the
hall effect device may need to be adjusted (see
the Maintenance Section) or replaced. See the
Drive Motor and Gearbox Replacement and
Access to Hall Effect Module procedure.
NOTE:Machines with L12253-[ ] PC Boards react
differently to loss of feedback. Instead of
running full speed, the motor voltage is
held to approximately 14VDC.
HALL EFFECT MODULE TEST (continued)
512
500
555
J1
J3
J4
J2
FIGURE F.11 CONTROL PC BOARD (CODES ABOVE 10500)
G3425
FIGURE F.11.a CONTROL PC BOARD (CODES ABOVE 10500)
T
P
1
R
6
5
D
4
9
R
8
1
R
4
3
R49
C
4
0
DZ10
Q7
R
6
0
D
3
2
C
5
R
1
1
0
D
3
7
R
1
1
5
X
4
R37
R
2
C
2
2
R
1
4
C
3
1
R
1
1
7
R
1
6
X5
R
5
2
R
1
1
3
T
1
R
4
R
8
8
D
8
Q10
D
Z
1
5
D
1
8
D
1
6
C
2
6
R
7
1
R
3
5
C
4
R
9
5
X7
R
9
7
C42
R
1
1
8
Q
3
R
1
0
1
C
3
5
R
5
8
R
7
4
R
9
8
D
2
2
R
2
7
X2
D
2
5
D
4
4
R
1
0
3
R
9
C17
C
9
R
1
1
4
R
7
5
C
4
3
R
5
9
R
5
3
R
7
7
D
Z
2
D
4
1
R
7
6
D7
D
Z
1
1
R
1
8
R
2
9
D
1
4
D
1
1
R
2
4
D
4
3
R
4
4
D
1
0
R84
R47
D
3
R
7
2
R
1
D
1
5
Q
2
R
7
R120
R
8
5
C46
DZ17
R
5
6
R
2
8
R
8
6
C45
R
1
5
R
4
5
R
8
2
R
9
0
D
Z
1
4
R
4
8
R
1
0
9
R
5
4
R
6
4
D
4
0
R
1
2
C1
D
1
2
R
8
3
C
4
7
R57
R108
D1
D
5
1
D
3
6
R
2
5
R
1
3
C18
R
2
1
C
1
9
R
1
1
9
C
2
7
R
6
1
C
8
Q5
Q
9
C
1
5
R92
Q
4
R
3
D
2
8
R
2
2
R
5
1
C
1
1
R
1
9
C
3
D54
C44
R
1
7
C
7
R
6
7
C
4
8
R
5
0
D
1
3
D
5
2
R
8
0
D
Z
1
3
X3
R
1
0
0
R
1
0
7
R
8
9
R
1
0
R
3
2
C30
D
5
6
R
1
0
4
Q
1
D46
C
1
3
R
9
6
R106
R
1
1
6
C
2
9
D
6
R
9
9
R36
D
2
C
1
2
C
4
1
D
2
4
D
4
7
X1
C
3
7
Q6
R
7
9
C
2
3
D9
D
3
4
D
4
R
6
8
R
6
3
R
6
6
D
Z
4
R
4
6
R
3
3
R
6
2
D
4
8
R
2
6
C
3
6
R
4
1
C
3
2
R
2
3
R112
R
1
1
Q
8
D
2
1
D
1
7
D33
C
2
R
3
0
R6
D
5
3
X6
D
5
R
9
4
R
5
C
6
D
2
7
D
1
9
R
1
0
5
C34
C
1
6
R
5
5
R
2
0
R
7
8
R34
D
Z
3
D
5
5
D
Z
1
8
C
3
8
C
2
1
R
3
8
R121
DZ12
DZ1
T
2
D
2
9
D
4
2
R111
R91
C
1
4
R
7
0
R
1
0
2
D
Z
1
6
C33
D
3
5
D
3
8
R
7
3
C
1
0
D
2
6
D
2
0
C
2
0
R
6
9
C
2
4
C39
R
3
1
D
3
9
L12253-4
CONTROL
J2
J3
J1
667
621
J4
J14
512
500
691
690
555
Contactor