Lincoln Electric PRO-CUT 60 SVM104-A Service Manual page 66

F-25
TEST PROCEDURE
1. Connect
supply to machine.
NOTE: When performing Tests A and
B
a. If any one voltage is missing or
below the specification, inspect
the associated plugs and wiring.
If there are no loose plugs or
wiring,
winding in the main transformer
could be defective. Replace the
main transformer.
b. If all secondary and auxiliary
voltages
inspect the Reconnect Panel to
make sure the machine is con-
nected for the proper operating
voltage. If the machine is con-
nected properly, the primary
winding in the main transformer
could be defective. Replace.
Test A: Main Secondary Voltage
Test
Auxiliary Winding Test #
1
2
3
4
PRO-CUT 60 (12/95)
TROUBLESHOOTING & REPAIR
MAIN TRANSFORMER TEST
main input power
then the associated
are missing, then
Test Voltage
From
Lead #31 on
Control
Relay CR2
Lead #C1 on
Control Board at
Plug location 5J5
Lead #C2 on
Control Board at
Plug location 1J7
Lead #H3 on
Power Board at
Plug location 3J22
Table F.2-Auxiliary Winding Tests
1. Locate on the Power Board
leads H1 and H2 to the SCR
module. See Figure F.2.
2. Turn ON/OFF Power Switch to
ON.
3. Test for 190 VAC across leads
H1 and H2.
4. Turn ON/OFF Power Switch to
OFF.
Test B: Auxiliary Winding Tests
1. Perform the
Winding Tests in Table F.2. Turn
the ON/OFF Power Switch to
ON for each test.
ON/OFF Power Switch to OFF
between each test.
testing a lead connected to
a Molex plug, carefully insert the
probe into the cavity of the plug
to make contact with the lead.
See Figures F.1, F.2, and F.10
for component and lead connec-
tion locations.
diagram.
To
Lead #32 on
Control Board at
Plug location 6J10
Lead #32 on
Control Board at
Plug location 6J10
Lead #H6 on
Control Board at
Plug location 3J7
Lead #H4 on
Power Board at
Plug location 1J22
four Auxiliary
Turn the
When
Refer to wiring
Expected Voltage
115 VAC
24 VAC
24 VAC
12 VAC