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| TROUBLESHOOTING & REPAIR |
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE (CONTINUED)
FIGURE F.1 – CAPACITOR DISCHARGE PROCEDURE
SWITCH
BOARD
CAPACITOR
TERMINALS
TEST PROCEDURE
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1.Remove input power to the Power Wave 455/R.
2.Using the 3/8” nut driver, remove the left and right case sides.
3.Be careful not to make contact with the capacitor terminals that are located in the bottom center of the left and right side switch boards. See Figure F.1.
4.Carefully check for a DC voltage at the capacitor terminals on both boards. Note the polarity is marked on the PC board and also lead #19 is positive.
5.If any voltage is present, proceed to Step #6. If no voltage is present, the capacitors are discharged.
NOTE: Normally the capacitors discharge in about two minutes after input power is removed.
6.Using the high wattage resistor
DO NOT TOUCH THE CAPACITOR TERMI- NALS WITH YOUR BARE HANDS. NEVER
USE A SHORTING STRAP FOR THIS PROCEDURE.
7.Repeat procedure for the other capacitor.
8.Recheck the voltage across the capacitor terminals. The voltage should be zero. If any voltage remains, repeat the discharge procedure.
NOTE: If the capacitor voltage is present after the discharge has been performed, this may indicate a faulty switch board.
