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Old 10th April 2013, 10:45 AM   #11
dazzz is offline dazzz  Israel
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I understood by drawing IC311 -1796 BURR BRAWN
IC301 IC302 IC303 IC304 IC305 IC306

ind the secand IC312 -1796 BURR BRAWN
IC307 IC308 IC309 IC310

So how has 8 ????

In your opinion
what the ic i need to change from 301 to 310 ?
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Old 10th April 2013, 11:52 AM   #12
dazzz is offline dazzz  Israel
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dvd denon 3910 stereo audio unit
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Last edited by dazzz; 10th April 2013 at 11:56 AM.
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Old 10th April 2013, 11:55 AM   #13
Ryssen is offline Ryssen  Sweden
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Quote:
ind the secand IC312 -1796 BURR BRAWN
IC307 IC308 IC309 IC310

So how has 8 ????

In your opinion
what the ic i need to change from 301 to 310 ?
Is for the Front speakers that u use for 2 channel stereo.
So its 4 opams (8 single opamps)
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Old 10th April 2013, 12:05 PM   #14
dazzz is offline dazzz  Israel
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What about the OPAMPS
IC301 IC302 IC303 IC304 IC305 IC306
Do you think they not need to replace ?
(I know that 2068D is a dual OPAMPS )

Last edited by dazzz; 10th April 2013 at 12:11 PM.
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Old 10th April 2013, 12:16 PM   #15
Ryssen is offline Ryssen  Sweden
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They are for the rear channels,I don´t know if you are going to use them,then maybe you can change them.it´s up to you.
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Old 10th April 2013, 12:29 PM   #16
dazzz is offline dazzz  Israel
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Are you sure I know all the circuit from 301 to 310 only addresses stereo
There are still 8 other opamps in defrent circuit


The main system unit also contains the audio circuitry for the centre, subwoofer and surround channels, based on two Texas Instruments/Burr Brown PCM1796 chips (each chip operating in stereo or dual channel mode), eight 2068D op amp chips plus an assortment of fairly high quality capacitors. I also noticed two oscillators, operating at 24.576MHz and 18.75MHz.

On top of this board, completely enclosed by metal shielding to protect the audio circuits, is a separate board for the FireWire interface. The design is based on a Bridgeco L5A9625 processor and is separately clocked using 22.579MHz and 24.576MHz oscillators.

The third board stacked topmost is a dedicated board for the audio front left/right channels. Here we find another two PCM1796 plus no less than ten 2068D op amps and accompanying capacitors. The Denon literature implies that one PCM1796 is used for the dedicated stereo left/right outputs (containing a downmixed signal for multi-channel sources) and the other is used for the front left/right channels forming part of the analogue 5.1 outputs.

Last edited by dazzz; 10th April 2013 at 12:32 PM.
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Old 10th April 2013, 01:09 PM   #17
dazzz is offline dazzz  Israel
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the circuit for rear channels und canter
diagram 7 on the service manual
2 burr brawn 1796( IC221-IC222) and 8 op amps 2068d
IC223 IC224 IC227 IC228
IC225 IC226 IC229 IC230
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File Type: zip dvd 3910 5.1 unit circuit.zip (264.3 KB, 6 views)

Last edited by dazzz; 10th April 2013 at 01:19 PM.
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Old 10th April 2013, 02:06 PM   #18
Ryssen is offline Ryssen  Sweden
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I would think where it says FL and FR is the stereo output,the other one says MIX.(the one above in the schema)
I have not changed these opamps on my DVD3910,so I am not absolutely sure.
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Old 10th April 2013, 02:21 PM   #19
dazzz is offline dazzz  Israel
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Dude you need to change all 10
All belong to the stereo channel

the FL FR C ar on
another bord
8 opamps
Look at the photo
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Old 10th April 2013, 02:31 PM   #20
Ryssen is offline Ryssen  Sweden
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If you follow the trace from the FL.FR RCA kontakt,then you will see where it is.
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