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BATTERY CHARGER SERVICE MANUAL
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4-TEST THE CAPACITOR
WARNING!
It is possible for the capacitor to not be fully discharged. To test for this, adjust your meter to the
highest DC voltage scale and touch the test leads to the capacitor terminals and note the reading. If
the meter needle deflects in the wrong direction reverse the test leads and repeat. If the capacitor was
not fully discharged a voltmeter reading will indicate this. Continue holding the voltmeter leads on the
capacitor terminals until the voltage reading drops to zero.
A
Using the analog ohmmeter adjust the scale to R X 10,000 (1 Ok) Ohms. Loosen the capacitor clamp
and carefully remove both transformer leads from the capacitor terminals so the wires do not break.
Touch the ohmmeter leads to the capacitor terminals and note the results. Reverse the test leads, repeat
the test and compare to the following:
•
GOOD CAPACITOR: When the ohmmeter leads are connected to the capacitor terminals the meter
needle bumps up to mid scale and quickly coasts back to high resistance (∞).
•
OPEN CAPACITOR: When the ohmmeter leads are connected to the capacitor the meter needle does
not move and stays at high resistance (∞). A bulge in the top of the capacitor may be visable if the
capacitor has failed "OPEN".
•
SHORTED CAPACITOR: When the ohmmeter leads are connected to the capacitor terminals, the meter
needle jumps to full scale, zero ohms and remains there.
B
If the capacitor is "Open" or "Shorted" it must be replaced.
CAUTION!
Use only the correct part number and rating capacitor as specified on the correct parts list for the
specific part number charger. The use of a different part number or rating capacitor may result in
improper charging, capacitor failure, transformer burnout, and / or battery damage.
10 - FORM NO. 56041170 / BATTERY CHARGER SERVICE MANUAL / PARTS LIST
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