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MODEL TPS - INSTRUCTIONS AND TROUBLESHOOTING INFORMATION
19 OF 20
CPN 40615
12.6 CHECKING CAPACITORS
When checking capacitors be sure all a.c. power is turned off and battery is disconnected from unit.
Check capacitors with d.c. voltmeter to see that d.c. voltage is at near -0- volts, then short circuit
capacitor. Momentarily short circuit the capacitor leads to assure complete discharge. Connect the
meter test leads to the capacitor leads or terminals and observe indicated resistance.
A good capacitor will indicate an initial low resistance and gradually increase as the capacitor charges.
The final resistance of a good capacitor is usually several hundred thousand ohms approaching a
megohm.
Initial high resistance approaching infinity indicates an open capacitor. Initial and continued low
resistance readings indicate a shorted capacitor.
When ordering replacement parts, drawings, or schematics, always give model number,
serial number and a.c. input voltage.