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August 22, 2008
3-15
SERVICE MANUAL
FABRICATOR 251
Co
nn
ected for D.C.
Electrode Negative
(DCEN) Weldi
n
g
Work Lead
Art # A-07164
Figu
r
e 3-15: Pola
r
ity Connections fo
r
DCEN
Changing polarity process.
a. Locate the two te
r
minal knobs at the f
r
ont of the machine. Refe
r
to Figu
r
es 3-14 and 3-15.
b. Remove both te
r
minal knobs by
r
otating counte
r
clockwise.
c. Set up the desi
r
ed lead pola
r
ity as pe
r
Table 3-3 and as shown in Figu
r
es 3-14 o
r
3-15.
d. Place the Wo
r
k Lead cable on the opposite te
r
minal.
e. Replace both te
r
minal knobs and tightly secu
r
e them to ensu
r
e good elect
r
ical connections.
CAUTION
Ensu
r
e te
r
minal knobs a
r
e tightly secu
r
ed and that the
r
e is no connection between positive and negative
te
r
minals.
f. Reconnect the input powe
r
to the powe
r
supply.
Summary of Contents for FABRICATOR 251
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Page 22: ...FABRICATOR 251 SERVICE MANUAL 2 6 August 22 2008 NOTES ...
Page 38: ...3 16 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 54: ...4 16 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 80: ...8 4 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 94: ...FABRICATOR 251 A 4 August 22 2008 APPENDIX 3 MAIN PCB CIRCUIT DIAGRAM 30 VAC Art A 08574 ...
Page 95: ...FABRICATOR 251 August 22 2008 A 5 DESCRIPTION FABRICATOR MAIN PCB 7977964 Art A 08574 _ ...
Page 96: ...FABRICATOR 251 A 6 August 22 2008 APPENDIX 4 SPOT TIMER CIRCUIT DIAGRAM Art A 08575 ...
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