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Old 1st June 2005, 03:15 PM   #1
Rob M is offline Rob M  United States
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Default NAD 522 display

I have an NAD 522 cd player with a dead display. These things have an LCD display backlit by three grain-of-wheat lamps, and it looks like one of them is burned out. Does anyone know anything about these? Any ideas about the right voltage/wattage for a replacement bulb? Thanks!
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Old 2nd June 2005, 03:19 PM   #2
Leolabs is offline Leolabs  Malaysia
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Is it really a LCD??Look likes a VFD to me.
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Old 2nd June 2005, 06:07 PM   #3
Rob M is offline Rob M  United States
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Quote:
Originally posted by Leolabs
Is it really a LCD??Look likes a VFD to me.
Maybe. Would a VFD need to be backlit?

Any idea about the lamps? If you've got one of these there that's working, would you mind measuring the voltage to the bulbs?
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Old 3rd June 2005, 06:35 PM   #4
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Hi Rob M,

Display is LCD with backlight, no VFD. On 5425 shematic lamp is connected between -15V and 0V with 10R 0.5W resistor in series.

Josip
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Old 3rd June 2005, 09:33 PM   #5
Rob M is offline Rob M  United States
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Thank you very much!
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Old 27th September 2007, 02:51 PM   #6
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Default Movie showing how to fix nad 522 and more

Old question, but decided to answer anyway.

In my electronic workshoop i see this problem with blown bulbs often so:

Check this movie about howto fix backlight faults in nad cd players and recievers as nad 705

http://freemovies.s-educator.org/rep...mingvideo.html

http://freemovies.s-educator.org/rep...mingvideo.html


best regards miguelovitch.dk
__________________
hello world
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Old 7th September 2009, 10:33 PM   #7
Mikelo is offline Mikelo  Antarctica
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Quote:
Originally Posted by miguelovitch.dk View Post
Old question, but decided to answer anyway.

In my electronic workshoop i see this problem with blown bulbs often so:

Check this movie about howto fix backlight faults in nad cd players and recievers as nad 705

http://freemovies.s-educator.org/rep...mingvideo.html

http://freemovies.s-educator.org/rep...mingvideo.html


best regards miguelovitch.dk
These links don't seem to work anymore and a search of t hat
site doesn't bring results.

Do you show how to replace the bulbs with LEDs?
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Old 13th August 2010, 09:37 AM   #8
elx is offline elx  France
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Quote:
Originally Posted by Mikelo View Post
These links don't seem to work anymore and a search of t hat
site doesn't bring results.

Do you show how to replace the bulbs with LEDs?

I try these link too but they don't work.
The solution is here

nad cd player

i hope this will help someone

sorry for my english...
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