Control Board Test; Switch Board Test; Power Factor Control Board Test; Planar Transformer Resistance Test - Lincoln Electric POWER WAVE C300 Service Manual

F-29
SWITCH BOARD TEST PROCEDURE (continued)
Description
Pre-Charge Relay
Coil Voltage
400VDC from
Buck/Boost and DC
Link Capacitor
48VAC from the
Planar Transformer
Winding
100VAC from
Planar Transformer
Winding
100VDC from
Output Rectifier
TROUBLESHOOTING AND REPAIR
TABLE F.5 – SWITCH BOARD VOLTAGE MEASUREMENTS
Test Points
Plug J41 Pin 6(-)
To
Plug J41 Pin 5(+)
B48(+)
To
B49(-)
B7 To B9
Also
B7 to B8
B38
To
B40
B52(-)
To
B51(+)
POWER WAVE® C300
Expected Reading
15VDC

Control Board Test.

400VDC
50VAC
100VAC
100VDC
Conditions
Correct input power
applied to machine
and pre-charge
completed. If not
correct Perform
the Power Factor
See the
wiring diagram.
Correct input power
applied to machine
and pre-charge
completed. If not
correct Perform the
Input Rectifier Test .
Correct input power
applied to machine
and pre-charge
completed. If not
correct perform the
Planar
Transformer Test.
Correct input power
applied to machine
and pre-charge
completed. If not
correct perform the
Planar
Transformer Test.
Correct input power
applied to machine
and pre-charge
completed. If not
correct perform the
Output
Rectifier Test .
F-29