CPL593H
100+ Head-Fier
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- May 7, 2005
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I'm posting this as information for those with NAD 502 CD players with a dead display. The repair is fairly easy. The display is backlit by two incandescent light bulbs that burn out. Replacing them restores the display. I measured the voltage on the bulbs to be about 15 volts so I replaced them with 18 volt bulbs rated for 10,000 hours life. The brightness is adequate (just barely) with these bulbs and they draw less current (based on info from the web) than the original bulbs so should run cooler and last longer. You could use brighter bulbs but I wanted them to last longer than the rest of the mechanicals.
To get to the bulbs you have to open up the case and remove the white plastic cover on the back side of the display. Have to remove the front panel and detach the main board to solder the new bulbs in. I got the bulbs from Mouser. Here's the part number: 606-CM7220
To get to the bulbs you have to open up the case and remove the white plastic cover on the back side of the display. Have to remove the front panel and detach the main board to solder the new bulbs in. I got the bulbs from Mouser. Here's the part number: 606-CM7220