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SWITCH BOARD AND FILTER CAPACITOR
REMOVAL AND REPLACEMENT PROCEDURE (CONTINUED)
TROUBLESHOOTING & REPAIR
F-65 F-65
POWER WAVE 655/R
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REPLACEMENT PROCEDURE
NOTE: Any instructions that are shipped with the
replacement part will supersede these
instructions.
1. If the filter capacitors are to be replaced, carefully
slide the new capacitors into the mounting bracket.
Position the capacitors so the correct polarity termi-
nal is lined up with the correct hole on the switch
board.
2. All heat sink and IGBT mounting surfaces must be
clean.
3. Apply a thin, even film (.004” t0 .01”) of thermal
compound (Penetrox A13) to the module. Keep the
compound away from the mounting holes.
Compound in the holes or on the threads of the
screws will affect the ability to get the proper torque.
4. Apply a thin coat of Penetrox A13 to the capacitor
terminals. Be careful not to apply compound to
screw threads or threaded area of terminals.
5. Mount the new Switch Board and tighten the four
cap head screws in the following manner.
Tighten all until snug.
Tighten all from 24 to 28 in-lbs.
Tighten all from 40 to 48 in-lbs.
6. Make sure the capacitor is positioned correctly.
Connect leads 19C/D+ and 20C/D- to the correct
terminals. Tighten to 55 in/lbs.
7. Position and mount the two nylon screws, fiber
spacers, and washers. Torque from 4 to 8 in-lbs.
8. Connect leads 11/12 or 15/16 to the correct termi-
nal.
9. Connect leads 13/14 or 17/18 to the correct termi-
nal.
10. Install the mylar insulating shield covering leads
11/12 or 15/16. Replace the cable tie.
11. Connect molex plug J40/J50 to the top of the
switch board.
12. Replace the high voltage protective shield.
13. Replace the case top and sides.