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Nad 5420 display problem
Nad 5420 display problem
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Old 2nd December 2004, 02:15 PM   #1
harry303 is offline harry303  Germany
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Join Date: Dec 2004
Location: Germany
Default Nad 5420 display problem


Iīm usaing a Nad 5420 Cd-Player,

but the display dosnīt work anymore.

If iI look through the display, I can see everthing,

but the lamp doesnīt work .

What kind of lamp is this ?

12 V ?? mA?

Didnīt find any information about this in www


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Old 2nd April 2005, 09:24 PM   #2
woofer is offline woofer  Canada
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Join Date: Apr 2005
Location: Ontario
Your display light bulb has just burned out --- it is easy to replace -- this has happened with my NAD 5420 at least three times.

Just open the cabinet (after unplugging power) and unsolder / take out the old bulb. Take it to an electronics supply store or repair shop and ask for a similar bulb -- there are many that will do. Then, solder it in and your display should work again.
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Old 2nd April 2005, 10:14 PM   #3
pinkmouse is offline pinkmouse  Europe
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Location: Rotherham, England
Nad 5420 display problem
This happened several times on my NAD tuner. In the end, I replaced the filament lamp with LEDs, and no problems since.
“One of the poets, whose name I cannot recall, has a passage, which I am unable at the moment to remember, in one of his works, which for the time being has slipped my mind, which hits off admirably this age-old situation.”
― PG Wodehouse
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Old 3rd April 2005, 06:10 PM   #4
cpemma is offline cpemma  United Kingdom
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Join Date: Jul 2003
Location: S Yorkshire OK
Originally posted by woofer
Your display light bulb has just burned out --- it is easy to replace -- this has happened with my NAD 5420 at least three times.
They must have revised the system then, as it was a beggar to get at on mine - screws holding the lamp housing are on the flip-side of the pcb.

After a regular annual failure and no easy source for the tubular bulb fitted, I fiitted a couple of 4R7 resistors with a wire-ended bulb in between. A bit dimmer than it was, but it's lasted about 8 years now.
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Old 23rd August 2019, 11:28 PM   #5
ooey is offline ooey
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Join Date: Aug 2019
If you want to replace the bulb, a 14V 80mA type will be fine. Unfortunately I did this to mine... and it wont spin CDs anymore, so be careful!
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