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Old 15th September 2003, 10:27 PM   #11
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I just don't know much more than the VERY basics - but I would know nothing if it wasn't for the desire to achieve real music from my system...and DIY audio
You have a point there and to be honest I started the same way too. Then I learnt the basics and errors became less and I actually started to understand what I was doing.

Continue with the mods but work tidy and thoruoghly think over what you want to do before doing it. This forum can be of great help when you're not sure what to do.

Please measure the display tubes voltage as I guess it doesn't function as it should.
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Old 15th September 2003, 10:29 PM   #12
SimontY is offline SimontY  United Kingdom
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I started the same way too.
That's encouraging :-)

-Simon
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Old 15th September 2003, 10:35 PM   #13
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That's encouraging :-)
And I burnt some cdplayers too

You can find the service manual here:

http://www.alw.audio.dsl.pipex.com/D...ice_Manual.pdf

Check the voltage at Q581's output ( -24.4 V ) and between VF1 and VF2 ( 3.6 V ). Be careful not to short pins when you measure.
VF1 and VF2 have -19.5 V with repect to ground. If voltages are OK there is probably one of the transistors blown that switch on the display voltage like Q852 etc.

Mmm, my 1000st post ! Time for a
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Old 15th September 2003, 10:37 PM   #14
SimontY is offline SimontY  United Kingdom
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You can find the service manual here:
Thanks for getting the link, but I got that (from a thread on here) already!

I was looking at it only 30 minutes ago

-Simon
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Old 15th September 2003, 10:44 PM   #15
SimontY is offline SimontY  United Kingdom
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Just in case you're interested, here is a pic from yesterday, just before the display fault occured.

You can see the CAT5 lead, input cap, rearranged Elna caps, Audiocom DVC-1 clock and power input with black gate, changed output caps, ic shielding with blu-tac etc etc. Its so much fun, isn't it? (apart from when it goes wrong...)

Congratulations on your 1000th post!!!

I will hopefully check the thing tomorrow, I'm too tired now
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Old 15th September 2003, 11:05 PM   #16
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Hi

In the process of fixing this problem, you may want to add a switch to manually turn off the display My Denon DCD-1560 cd player has a front panel button to do just that. Apparently turning off all the display LED's leads to a quieter playback circuit (since all the switching diodes are now off). I have seen a few other older high-end cd players that have the same facility.

Good luck with the solder iron!

Cheers -

Pradeep
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Old 15th September 2003, 11:07 PM   #17
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CD63 doesn't have a multiplexing ( and terribly interfering ) LED display, it has a display tube.

Please study the schematic if nothing can blow while switching the display off and on. Better repair it first before adding a switch to switch it off again

IME there is a small difference when the display isn't lit but it can be darn impractical now and then
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Old 1st March 2005, 08:48 PM   #18
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So, 1.5 years has gone and I feel like trying to fix my cd player display again, lol

Today I actually removed the display/control board from it's plastic surroundings (the player's fascia). The display tube has a sort of stained, dark area in one corner - could it be burnt/broken?

I plucked up the courage to measure the voltage going in to the display/control umbelical socket - this was 5v as it's meant to be, so I've narrowed the problem down now.

Perhaps a photo of the display will help, I'll go and take one...
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Old 1st March 2005, 09:19 PM   #19
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Righto, can anyone who knows what these are meant to look like please tell me if it's supposed to have that cr@p in the corner?
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Old 2nd March 2005, 07:19 AM   #20
Ruach is offline Ruach  Singapore
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I may have the solution to your problem.

I had the same problem on my CD63 some years back when I was modding it.

In my situation, everything on the CD63 worked except the display.

After one day/nite of troubleshooting, I discovered that one of the copper threads supplying 5V to the microprocessor and data i/c has broken contact. A simple hardwiring fixed the problem.

You may have lifted the thread when you are installing a bigger capacitor at C815.

Hope this helps.
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