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Yamaha RX530 Receiver Display lamp

I have had my receiver forever and suddenly last year the display went dark. I had it repaired and 3 months later it went out again. I had it repaired again and about 5 months later it went out again. I took it apart myself and removed the lamp. I noticed the wires looked like the coating had melted through to the wires. I am not sure why or what to do to prevent this from happening again. I found the replacement lamps on TigerDirect.com and they have 2 part numbers. I am not sure if it matters which one you use but one is $2.95 and the other is $3.95. I haven't ordered yet as I am not sure which one to get and if I need to do something else to prevent this from happening again. I found the service manual for sale on www.servicemanuals.net but hoped I wouldn't have to pay the money for it to figure this problem out.

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Try finding out the nominal voltage for the original lamps (or the replacement you want to use) and then measure the voltage on your unit's display lamp socket (or wires).
Seems like the lamp supply voltage is slightly higher than normal and with each power on/off it will spike a little, eventually burning out the lamp in time.

You can try to connect a resistor in series with the lamp. Measure the lamp's resistance - if you add a resistor of the same value, the lamp will then have only about one half of the voltage across it. You can then decrease the value of the resistor until the voltage across the lamp is about the nominal lamp voltage, maybe a tiny bit lower, the rest of it will drop across the resistor. You may have to experiment a bit to find out the correct resistor value.
Be sure to use a resistor that has at least the same power rating (wattage) as the lamp, or it may heat up or burn out.

Hope you can make it shine again...

Regards

3rq8 (Triarcuate)

Posted on Jul 24, 2009

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Posted on Jan 02, 2017

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