Lincoln Electric POWER WAVE C300 Service Manual page 40

F-21
CONTROL BOARD TEST PROCEDURE (continued)
Description
Connection to
Output
Terminals
Connections to
Normally
Closed
Thermostats
TROUBLESHOOTING AND REPAIR
TABLE F.3 - CONTROL BOARD ASSOCIATED RESISTANCE
Test Points Lead Numbers
J9 pin 3
To
Negative
Output
Terminal
J9 pin 1
To
Positive Output Positive Output
Terminal
J5 pin 2
To
J5 pin 3
POWER WAVE® C300
Expected
Readings
Lead 202 Zero Ohms
To
Negative
Output
Terminal
Lead 206 Zero Ohms
To
Terminal
Lead 410 Zero Ohms
To
Lead 409
F-21
Conditions
No Input power
applied to
machine
No Input power
applied to
machine