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TROUBLESHOOTING & REPAIR
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE (continued)
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WARNING
ELECTRIC SHOCK can kill.
• Have an electrician install and service this equipment.
•Turn the input power off at the fuse box before working on equipment.
•Do not touch electrically hot parts.
•Prior to performing preventative mainte- nance, perform the following capacitor dis- charge procedure to avoid electric shock.
4.Obtain a high resistance and high wattage resistor
5.Locate the four capacitor terminals (large hex head cap screws) shown in Figure F.1. One pair is at the top and one pair is at the bottom of the Power Board.
6.Use electrically insulated gloves and insu- lated pliers. Hold the body of the resistor and connect the resistor leads across the two capacitor terminals. Hold the resistor in place for 10 seconds. DO NOT TOUCH CAPACITOR TERMINALS WITH YOUR BARE HANDS.
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DISCHARGE PROCEDURE
1.Turn off input power and disconnect input power lines.
2.Remove the 5/16" hex head screws from the wraparound machine cover.
3.Be careful not to make contact with the capacitor terminals located in the top and bottom of the Input Power Board.
7.Repeat the discharge procedure for the capacitor on the other two terminals.
8.Check the voltage across the terminals of all capacitors with a DC voltmeter. Polarity of the capacitor terminals is marked on the PC board above the terminals. Voltage should be zero. If any voltage remains, repeat this capacitor discharge procedure.
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FIGURE F.1 – LOCATION OF INPUT FILTER CAPACITOR TERMINALS
INPUT | UPPER | |
POWER | ||
CAPACITOR TERMINALS | ||
BOARD | ||
|
LOWER
CAPACITOR
TERMINALS
POWER
RESISTOR
RIGHT SIDE OF MACHINE | INSULATED |
| PLIERS |
INSULATED
GLOVES
