Lincoln Electric PRO-CUT 60 SVM104-A Service Manual page 63

MATERIALS NEEDED
- Analog Volt/Ohmmeter
(Multimeter) with RX10 or RX1000
scale.
- PRO-CUT 60 Wiring Diagrams
- Phillips Head Screwdriver
TEST PROCEDURE
1. Turn ON/OFF Power Switch to
OFF.
2. Disconnect main input power to
machine.
3. Perform
DISCHARGE PROCEDURE.
4. Locate Power Board.
See Figure F.8.
5. Locate and remove the leads
marked #40 by removing the
terminal screw connecting them
to the Power Board.
See Figure F.9.
a. Move the leads out of the
way.
NEGATIVE (-) PROBE
TO TERMINAL
MARKED:
TEST
TEST B
TEST C
TEST D
TROUBLESHOOTING & REPAIR
TRANSISTOR MODULE TEST
the CAPACITOR
POSITIVE (+) PROBE
TO TERMINAL
MARKED:
C
#40
#40
Neg
TABLE F.1 - Transistor Module Resistance Tests
6. Replace the terminal screw
snugly, a little more than finger
tight. The Transistor Module is
mounted behind the Power
Board and the terminal screw
completes the
connection.
7. Locate and remove the one lead
marked NEG by removing the
terminal screw connecting it to
the Power Board.
See Figure F.9.
a. Move the lead out of the
way.
8. Replace the terminal screw
snugly, a little more than finger
tight. The Transistor Module is
mounted behind the Power
Board and the terminal screw
completes the
connection.
9. Remove the two leads marked
C by removing the terminal
screw connecting them to the
Power Board. See Figure F.9.
a. Move the lead out of the
way.
EXPECTED
RESISTANCE
#40 1,000 ohms or less
C 4,500 ohms or higher
1,000 ohms or less
Neg
#40
4,500 ohms or higher
F-22
electrical
electrical
PRO-CUT 60