to Section TOC
to Master TOC
|
| TROUBLESHOOTING & REPAIR |
SWITCH BOARD AND FILTER CAPACITOR
REMOVAL AND REPLACEMENT (CONTINUED)
Return
Return to Section TOC
Return to Section TOC
Return
Return to Master TOC
Return to Master TOC
7.Using the 7/16” wrench, remove leads 13/14 or 17/18 from the switch board.
8.Using the 7/16” wrench, remove leads 11/12 or 15/16 from the switch board.
9.Using the 7/16” wrench, remove leads 19C/D+ and 20C/D- from the switch board capacitor connection bolts.
10.With the slot head screwdriver, remove the two nylon mounting screws at the bottom of the switch board. Note placement of the
11.Using the 3/16” allen wrench, carefully remove the four cap screws that mount the switch board to the heat sink.
12.Carefully remove the switch board from the heat sink.
13.If the filter capacitor is to be removed, care- fully slide it out of the mounting bracket.
REPLACEMENT PROCEDURE
1.If the filter capacitor is to be replaced, care- fully slide the new capacitor into the mount- ing bracket. Position the capacitor so the correct polarity terminal 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 coat of thermal compound (Penetrox A13) 0.005 to 0.010 inches thick to the mating surfaces. Do not apply around mounting holes.
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
Tighten all from 40 to 48
6.Make sure the capacitor is positioned cor- rectly. 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
8.Connect leads 11/12 or 15/16 to the correct terminal.
9.Connect leads 13/14 or 17/18 to the correct terminal.
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.Using the 5/16” nut driver, install the glastic high voltage protective shield.
13.Install the case top and sides using the 3/8” nut driver.
Return to Section TOC
Return to Master TOC
