Lincoln Electric PRO-CUT 60 SVM104-A Service Manual page 69

TROUBLESHOOTING & REPAIR
POWER BOARD TEST
H1
LEAD
H2
LEAD
C
LEADS
NEG
LEAD
#40
LEADS
FIGURE F.11-Power Board Test Points
TEST PROCEDURE
1. Connect input
machine.
2. Turn ON/OFF Power Switch to
OFF.
Test A: Test for 12 VAC voltage
to Power Board
1. Locate and insert probes into
Power Board Plug locations
1J22 (lead H4)
(lead H3). See Figure F.11.
Carefully insert the probes into
MOUNTING
SCREWS
40
H1
B
H2
4J20
J20
2J20
C
NEG
#40
J22
3J22
4J22
the lead cavity to make contact
with the lead.
power to
2. Turn ON/OFF Power Switch to
ON.
a. If 12 VAC is NOT present,
b
and 3J22
3. Turn ON/OFF Power Switch to
OFF.
1J21
J21
G1
G2
1J20
1J22
2J22
check Plug J22 for loose or
faulty wiring.
If no loose or faulty wiring is
found, perform
Transformer Test.
F-28
Main
PRO-CUT 60