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TROUBLESHOOTING & REPAIR | ||
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CAPACITOR BANK REMOVAL AND REPLACEMENT
PROCEDURE
See Figure F.17 for location of Capacitor Bank Removal and Replacement com- ponents.
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FIGURE F.17 - Location of Capacitor
Bank Removal and Replacement
Components
1.Disconnect main input power to the machine.
2.Test that the capacitors are dis- charged using a volt ohmmeter. Polarity must be observed.
3.Remove the two transformer sec- ondary leads (X2 and X3) for the negative capacitor bank buss bar using two fi" open end wrenches.
4.Remove the output choke lead and the heavy lead extending from the SCR Rectifier Assembly to the posi- tive capacitor bank buss bar using a fi" open end wrench.
5.Remove lead #206 and the D1 diode lead from the negative capac- itor bank buss bar using a slot head screwdriver and 3/8" open end wrench.
6.Remove the #204 lead from the pos- itive buss bar.
7.Remove the shunt from the negative capacitor bank buss bar using a 1/2" socket wrench with a universal tool adapter.
a.Two people may be required to remove the shunt. One person may have to reach through from the left side of the machine to keep the bolt in position while the other person loosens the nut.
b.There is no shunt on machine code 9402.
8.Remove the two screws holding the capacitor bank to the floor of the machine using a 5/16" nut driver.
9.Clear the leads and carefully remove the capacitor bank assem- bly from the machine.