Control Board Test; Switch Board Test - Lincoln Electric POWER WAVE S350 Service Manual

F-27
SWITCH BOARD TEST PROCEDURE (continued)
TABLE F.5 – SWITCH BOARD VOLTAGE MEASUREMENTS
Description
Pre-charge relay
coil voltage
400VDC from
Buck/Boost and DC
Link Capacitor
48 VAC from the
Planar Transformer
Winding
100VAC from
Planar Transformer
Winding
100VDC from
Output Rectifier
TROUBLESHOOTING AND REPAIR
Test Points
Plug J41 Pin 6(-)
To
Plug J41 Pin5(+)
B48(+)
To
B49(-)
B7 To B9
Also
B7 to B8
B38
To
B40
B52(-)
To
B51(+)
POWER WAVE ® S350
Expected Reading
15VDC
400VDC
50V C
A
AC
100V
100VDC
F-27
Conditions
Correct input power
applied to machine
and pre-charge
completed. If not
correct the Perform
the Power Factor

Control Board Test.

See wiring diagam
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
Outpur
Rectifier Test