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Sharp R1480 OTR microwave night and work light won't turn on

Changed bulbs, niether will work. one of the lights acted funny (on off erratic) just before failure. I thought the filament was loose, but issems as a control board problem. 115 VAC is at both sockets. Any help? THx

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Re: Sharp R1480 OTR microwave night and work light won't...

Check you are getting 115 V with the bulb in circuit (safest way to test this is to solder a couple of bits of wire to one of the bulbs so you can access the terminals with the bulb inline (be careful), and then measure voltage across it.) The load imposed by the bulb may be causing the power supply to go into a protection mode - usually only if bulb is shorting, but may be a problem with the power relay. If there is a problem with the power supply, through the control board relay or otherwise, this will tell you for sure. Otherwise, if there is definitely the right voltage to a good bulb, then it will light. Check that the bulb is definitely making contact well, and make absolutely sure you have the correct bulbs for 115v, not the 220/240v ones. If this gives you no luck then please ask again with details of what you found. Hope this helps :)

Posted on Aug 16, 2007

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