Lincoln Electric PRO-CUT 60 SVM104-A Service Manual page 74

F-33
HIGH VOLTAGE TRANSFORMER AND CIRCUIT TEST
Test B: Test Resistance of High
Voltage Transformer Primary
1. Disconnect
machine.
2. Turn ON/OFF Power Switch to
OFF.
3. Perform
DISCHARGE PROCEDURE.
4. Locate and touch probes to lead
#31 and lead #35 on the Control
Relay CR2. Resistance should
be 4 ohms.
a. If 4 ohms resistance is not
PRO-CUT 60
TROUBLESHOOTING & REPAIR
input power
the CAPACITOR
measured, replace the High
Voltage Transformer.
Test C: Test Resistance of High
Voltage Transformer Secondary
1. Perform Test B Steps #1, 2, & 3
to if needed.
2. Locate the two white leads
soldered into the two black
doughnut chokes located below
the High Frequency Transformer.
See Figure F.12.
3. Touch the probes to the two
white leads. Resistance should
be about 12,500 ohms.
a. If approximately
ohms is
replace the High Voltage
Transformer.
Test D: Test Chokes L501 and
L502 for continuity
1. Perform Test B Steps # 1, 2, & 3
if needed.
2. Touch probes to each side of the
black chokes located below the
High Frequency Transformer.
Resistance should be 10 ohms
(continuity).
a. If continuity is not measured,
chokes are open. Replace.
12,500
not measured,