AIWA VCR HV-F85AE - very dim display

[Emanuele Girlando]

Checked caps around but none seems bad.
Applied the overheating filament procedure as suggested in the newsgroup
FAQ - little improvement but definitively not enough.
Any suggestion?
What voltages do I have to expect? Filament is 4,5VAC biased at -16VDC.
Other lines to the driver are -30V and -20V..
Does anybody has the power supply diagram? (or other relevant parts..)
Thanks.
E.G.
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Emanuele Girlando (IW1DHI)
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[Emanuele Girlando]

has anybody got an idea??
tks

"Emanuele Girlando" <emanuele_girlando@GETRID.yahoo.com> wrote in message news:<kFcWb.217971$VW.8906474@news3.tin.it>...

Checked caps around but none seems bad.
Applied the overheating filament procedure as suggested in the newsgroup
FAQ - little improvement but definitively not enough.
Any suggestion?
What voltages do I have to expect? Filament is 4,5VAC biased at -16VDC.
Other lines to the driver are -30V and -20V..
Does anybody has the power supply diagram? (or other relevant parts..)
Thanks.
E.G.

 

[michael turner]

On Thu, 12 Feb 2004 08:53:15 -0800, Emanuele Girlando wrote:

has anybody got an idea??

Perhaps it's just that the display itself is knackered. They are a
thermionic device (vacuum-tube/valve), and so will have a limited
lifespan, go low-emission, soft, whatever.

"Emanuele Girlando" <emanuele_girlando@GETRID.yahoo.com> wrote in message
news:<kFcWb.217971$VW.8906474@news3.tin.it>...
Checked caps around but none seems bad. Applied the overheating filament
procedure as suggested in the newsgroup FAQ - little improvement but
definitively not enough. Any suggestion?
What voltages do I have to expect? Filament is 4,5VAC biased at -16VDC.
Other lines to the driver are -30V and -20V.. Does anybody has the power
supply diagram? (or other relevant parts..) Thanks.

--
Michael Turner