NAD 522 display

Rob M · 1st June 2005, 03:15 PM

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!

Leolabs · 2nd June 2005, 03:19 PM

Is it really a LCD??Look likes a VFD to me.

Rob M · 2nd June 2005, 06:07 PM

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?

josiphal · 3rd June 2005, 06:35 PM

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

Rob M · 3rd June 2005, 09:33 PM

Thank you very much!

miguelovitch.dk · 27th September 2007, 02:51 PM

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

Mikelo · 7th September 2009, 10:33 PM

Quote:

Originally Posted by miguelovitch.dk

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?

elx · 13th August 2010, 09:37 AM

Quote:

Originally Posted by Mikelo

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...

1st June 2005, 03:15 PM	#1
Rob M diyAudio Member Join Date: Feb 2003 Location: San Diego, CA	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!

27th September 2007, 02:51 PM	#6
miguelovitch.dk diyAudio Member Join Date: Jul 2007	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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2nd June 2005, 03:19 PM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Is it really a LCD??Look likes a VFD to me.

3rd June 2005, 06:35 PM	#4
josiphal diyAudio Member Join Date: Jun 2003 Location: Croatia	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

3rd June 2005, 09:33 PM	#5
Rob M diyAudio Member Join Date: Feb 2003 Location: San Diego, CA	Thank you very much!

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