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Old 5th November 2011, 02:11 PM   #17651
6h5c is offline 6h5c  Netherlands
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Hi,

The AK4393 does need an analog output filter, see page 18 of the datasheet. The stopband attenuation is only 75dB, so some extra filtering is welcome. The suggested filter has a -3dB frequency of 70kHz, so you can use the DOS-CFP version for the SA8400, it has almost the same curve. The output voltage will be a bit lower, but that can be solved by raising the emitter resistors R9/R10 to 1k.

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Ray
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Old 5th November 2011, 10:00 PM   #17652
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Thanks Ray, I'll use the SA8400 configuration then with the new resistor values. I guess the 15VA torroid is enough to feed the DOS board, since you already mentioned it consumed about 40mA max. with standard regulators. Now I can make a full list of parts needed, thanks.

Nino
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Old 6th November 2011, 07:56 AM   #17653
quan is offline quan  Australia
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Hi Guys, my remote does not seem to work that well since the mod. Is there any way to improve on it? I basically need to stand about half a meter nearby for it to work
Quan.
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Old 6th November 2011, 09:40 AM   #17654
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In my CD53 I replaced CY01 (22n ceramic) by a 10u EL and the remote now pics signal from across the room.
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Old 6th November 2011, 07:18 PM   #17655
UV101 is offline UV101  England
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Quote:
Originally Posted by quan View Post
Hi Guys, my remote does not seem to work that well since the mod. Is there any way to improve on it? I basically need to stand about half a meter nearby for it to work
Quan.
Check the remote batteries!!!!
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Old 6th November 2011, 08:55 PM   #17656
quan is offline quan  Australia
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Check the remote batteries!!!!
Yeh ,that was the first thing that i check as well.
was thinking about that ribbon connect to the display board . The contact with IR side could be bad?
Quan.
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Old 6th November 2011, 10:11 PM   #17657
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I've been through one display ribbon already. I wonder if it's possible to source replacements from somewhere besides cannibalizing other players? The idea of hard-wiring the display or mechanism does not sound very appealing to me, to be honest.
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Old 6th November 2011, 10:39 PM   #17658
SimontY is offline SimontY  United Kingdom
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You could change it for another (new) connector and cable I suppose, but matching the correct PCB spacing would be difficult.
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Old 6th November 2011, 11:19 PM   #17659
quan is offline quan  Australia
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Originally Posted by Ben Hanke View Post
I've been through one display ribbon already. I wonder if it's possible to source replacements from somewhere besides cannibalizing other players? The idea of hard-wiring the display or mechanism does not sound very appealing to me, to be honest.
I have been checking on ebay. There are certainly similar types but not exact number of pins- the closest was 40pins type. Not sure about the spacing btw the pins.
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Old 7th November 2011, 02:36 AM   #17660
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I took a quick look on Charles Hyde & Son's site and they don't have them, but on an unrelated note - they do have CD63KI toroids - I thought those were hard to get? Sharing in case anyone's interested. CHS - replacement remote controls, instruction manuals, audio & video accessories, electronic components & spare parts
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