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I have (another) YAMAHA CR-440 NATURAL SOUND STEREO RECEIVER. Sound is fine and Stereo light functions correctly, but ALL other lights are not working. I've checked all (3) internal fuses (fine) loooked for any loose connection and/or burned components but all appears visually ok. Any thoughts on where these lights get their power (how to trace it back from the bulbs)? Thanks!

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  • ka9ppa Apr 30, 2010

    Thank you. Could you give me any further information on locating, checking, and changing this "sealed power unit"? (Is it a capacitor?)

  • ka9ppa May 09, 2010

    Thank you. Yes, I have a schematic now and can probably take it from here.

    Thanks again.

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You can go here for a service manual diagram of a similar product that shows the circuit and wiring diagram

http://www.schematics.ca/modules/PDdownloads/viewcat.php?cid=80


You can purchase an entire service manual for your receiver at

http://www.analogalley.com/m_yamaha.htm

Posted on Apr 30, 2010

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The display functions on a sealed power unit which do burn out. The display will have to be change to get it lighted again. It is just like changing a light bulb but more complicated

Posted on Apr 30, 2010

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