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Old 2nd March 2005, 08:17 AM   #21
SimontY is offline SimontY  United Kingdom
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Ruach,

I am delighted to have receive your response. If I have time tonight I will go inside and look for damage around C815. That part location sounds familiar, so it's probably one I changed
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Old 2nd March 2005, 09:04 AM   #22
karma is offline karma  Canada
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like any tube it has a getter in the corner to remove any extra air
when it was first made. it should be silver if it white or brown
it likely has an air leak. and would need to be replaced.


there should be a little glass tube sticking out the side where
thay removed the air. see if it has been snaped off by mistake
if so its toast

the plastic cover is under this glass tube somtimes removing it
snaps it off

looks white to me
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Old 2nd March 2005, 09:36 AM   #23
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by karma
like any tube it has a getter in the corner to remove any extra air
when it was first made. it should be silver if it white or brown
it likely has an air leak. and would need to be replaced.


there should be a little glass tube sticking out the side where
thay removed the air. see if it has been snaped off by mistake
if so its toast

the plastic cover is under this glass tube somtimes removing it
snaps it off

looks white to me
Hi karma,

From memory at least, the discoloured corner is not where the small glass tube is. I think it's located on the other side. I will look when I can (I'm at work now).
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Old 2nd March 2005, 12:40 PM   #24
Ruach is offline Ruach  Singapore
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Glad to help.

I had hell for the whole day and night when the display "died".

The copper threads connected to C815 (if I remembered correctly) are very thin and can be lifted quite easily.

C815 is next to the 5V voltage regulator with the heatsink.

Best of luck.

If you managed to have your CD63 up and running again, I would recommend an additional transformer for your CD63, which is guaranteed to do wonders.
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Old 2nd March 2005, 02:49 PM   #25
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by Ruach
C815 is next to the 5V voltage regulator with the heatsink.

If you managed to have your CD63 up and running again, I would recommend an additional transformer for your CD63, which is guaranteed to do wonders.
Thanks!

My CD63 has been in constant use all this time, only with no display... I just don't know what track is playing all time

When you say "additional transformer" do you mean to suggest separating the PSU sections out with dedicated transformers for the different sections, or an isolation transformer? I am using an isolation transformer just for the player, which does a lot of good. I have a dedicated external PSU to run the clock, but everything else is normal psu-wise, other than the usual schottky diodes, changed caps etc.
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Old 2nd March 2005, 04:56 PM   #26
Ruach is offline Ruach  Singapore
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I meant separating the PSU for the DAC (supplying voltage to the 7805 voltage regulator) with a dedicated transformer. A 30VA toroidal would suffice.
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Old 2nd March 2005, 07:52 PM   #27
SimontY is offline SimontY  United Kingdom
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Ahha, very interesting. Will have to look into this possibility... I've done a lot of work on it, so I might as well do everything sensible!
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Old 2nd March 2005, 08:18 PM   #28
Ruach is offline Ruach  Singapore
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check this out:

http://db.audioasylum.com/cgi/m.mpl?...er&r=&session=
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Old 2nd March 2005, 10:14 PM   #29
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Simon - would you like a free, known-good display unit as a backup/spare? Drop me an email and I'll post you the front panel off my old CD63.
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Old 2nd March 2005, 11:13 PM   #30
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by Ruach
check this out:

http://db.audioasylum.com/cgi/m.mpl?...er&r=&session=
Ooh, very interesting! Just need to figure out what I can fit in and where, and which wires to snip and points to solder to

First tho, I am trying different op-amps. I'm sick of the OPA2604 I put in, and am trialling 2132....
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