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Author Topic: Sony str dg500 dim display  (Read 1295 times)

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Offline ConnecteurTopic starter

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Sony str dg500 dim display
« on: May 17, 2021, 09:17:51 pm »
I have what appears to be a VFD (vacuum fluorescent display).
It's turned up to full brightness and it's barely readable, even in low light.
It seems to be on it's way out.  Is there a simple and uncostly repair available?
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Offline AtomicRob

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Re: Sony str dg500 dim display
« Reply #1 on: May 18, 2021, 05:36:35 pm »
I have some gear with a similar issue and I saw an interesting thread here: https://www.eevblog.com/forum/chat/vacuum-fluorescent-display-rejuvenation/ with some suggestions.
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Offline mzacharias

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Re: Sony str dg500 dim display
« Reply #2 on: May 19, 2021, 02:01:09 pm »
The display tube may be bad, but before condemning it I would check the filament voltages, any small parts like resistors or diodes associated with the filaments,

and also check the -30V bias supply.
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