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Old 7th August 2006, 02:27 PM   #1
Ghianni is offline Ghianni  Greece
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Default Studer A721

Hi all,

I have just repaired this great tape deck, but the display lamp "Luminiscent Lamp A721 part no: 1.721.256.00" is dim. The voltages are OK so I believe it has reached its life-end. Any source to find a replacement? The factory has it, but it costs too much.

Ghianni.
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Old 9th August 2006, 04:34 PM   #2
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The lamp should have identification on it such as a number. Take the lamp to an electronics parts store and see if they can identify the lamp and have a replacement.
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Old 12th August 2006, 03:05 PM   #3
BrianL is offline BrianL  United States
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First, have you switched the lamp with another identical lamp elsewhere on the tape machine == perhaps from another channel? That way you can verifiy whether it's the light bulb or something else.

Have you contacted Studer to find out if they can tell you what generic bulb will replace it? I'm sure the bulb is not a custom item.

Incandescent bulbs do not usually grow (noticably) dim with age; they just burn out.
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Old 12th August 2006, 04:15 PM   #4
Ghianni is offline Ghianni  Greece
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Actually its a foil fluorescent lamp, behind the program meter LCD display, running at about 160 V.
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File Type: jpg foil_lamp.jpg (20.7 KB, 364 views)
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Old 26th February 2007, 11:58 AM   #5
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Default Display lamp a721

Hello Gianni,
Have you found the display lamp of the Studer a721 without having to purchase the whole dispay unit.
If so please let me know.
Many thanks,
Jean-Michel
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Old 26th February 2007, 03:53 PM   #6
Ghianni is offline Ghianni  Greece
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Hi Jean-Michel,

Unfortunately I have not found it.
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Old 12th March 2007, 01:54 PM   #7
ebrjvd is offline ebrjvd  Belgium
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Default Luminiscent Lamp A721

Simply look on eBay or Google for "EL-folie", "Leuchtfolie" or "EL backlight" (e.g. eBay article 150094177479).
You can buy sheets, or strips of 1/4", 1/2", 3/4", 1", or 2" width.
Cut to the required size and connect the wires.

The price of the Studer/Revox spare part is horrendously expensive, if you can find it.
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Old 12th March 2007, 07:18 PM   #8
Ghianni is offline Ghianni  Greece
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Thanks for the info !
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Old 13th June 2007, 03:16 PM   #9
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I have my A721 all apart trying to install my new 'leuchtfolie' bought from a guy in Costa Rica off Ebay. Having some trouble actually getting in to the black plastic surrounding the old luminescent lamp and display - service manual is not much help because it seems it is missing the appropriate section. did you finish your repair? I am working at the grab clips on the back of the panel but it is impossible to open them all at once with only two hands if you know what I mean..
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Old 13th June 2007, 05:40 PM   #10
Ghianni is offline Ghianni  Greece
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I have been told that the replacement is a bit tricky job but I haven't yet tried it since I haven't found any suitable foil.
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