12.
Load side Line side
Load side
Thyristor
1
Line side
Thyristor
Black Blue
Brown Red
-. Rem ove the faulty thyristors. Preparation heat sink and semiconductor.
11.
• Clean all polished contact surfaces
carefully with Ethanol.
The contact surfaces must dry before
lubrication.10.
• void contact with surface.
13.
• Use well moistened lint-free paper.
Place the semiconductor the right direction.
• Lubricate directly after
polishing/cleaning, within minutes.
• void contact with the surfaces after
lubrication. Then wipe the surface
in order get very thin layer oil.
• Drip couple drops silicone oil on
the cleaned contact surfaces, avoid
getting oil the guide hole. Connect the gate cables.
• Lightly polish the contact surface f
semiconductor (the nickel layer must not
be polished through) with abrasive cloth
P600 which fix flat surface. Mount the guide pins the bottom heatsink. Smooth the
oil lightly over the whole surface using
lint-free paper. Check the semiconductor's symbol and type
specification
