Lincoln Electric 11694 Service Manual page 57

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POWER WAVE S350
PLANAR TRANSFORMER RESISTANCE TEST
B51
B53
B52
B39
B38
B28
B29
B37
B41
TEST POINTS
B37 TO B41
B39 TO B40
B40 TO B38
B8 TO B7
B7 TO B9
B37 TO B40
B37 TO B7
B40 TO B7
ALL TEST POINTS TO CHASSIS GROUND
Figure F.21 – Planar transformer test points
Table F.10 – Planar transformer resistance checks
EXPECTED RESISTANCE
ZERO OHMS
ZERO OHMS
ZERO OHMS
ZERO OHMS
ZERO OHMS
INFINITY
INFINITY
INFINITY
INFINITY
TROUBLESHOOTING AND REPAIR
(continued)
INVERTER
CHOKE
B9
B7
B8
COMMENTS
CONTINUITY OF PRIMARY WINDING.
CONTINUITY OF 1/2 OF SECONDARY WINDING.
CONTINUITY OF 1/2 OF SECONDARY WINDING.
CONTINUITY OF 1/2 OF 48V WINDING.
CONTINUITY OF 1/2 OF 48V WINDING.
ISOLATION BETWEEN PRIMARY AND SECONDARY WINDING.
ISOLATION BETWEEN PRIMARY AND 48V WINDING.
ISOLATION BETWEEN SECONDARY AND 48V WINDINGS.
ISOLATION FROM ALL WINDINGS TO CHASSIS GROUND.
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