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Old 17th September 2013, 03:04 PM   #1
dazzz is offline dazzz  Israel
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Join Date: Apr 2013
Default my dvd denon 2900 mod dazzz style :)

this i my mode on dvd denon 2900
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Old 18th September 2013, 02:11 AM   #2
dazzz is offline dazzz  Israel
diyAudio Member
 
Join Date: Apr 2013
The process of my mod
On the DENON DVD
2900

audio circuit
I removed the muting transistor
TR231
TR232


I replaced the capacitors
C220
C221

In the capacitor
RUBYCON - 16ZLH220MEFC6.3X11 - CAPACITOR, 220UF, 16V

I replaced the capacitor
C 234
To
RUBYCON - 35ZLH470MEFC10X16 - CAPACITOR, 470UF, 35V


I changed the film capacitors
C371-C374
To
VISHAY ROEDERSTEIN - KP1830147631 - CAP, FILM, 470PF, 1%, 630V, RADIAL

I removed all capacitors
C355
C356
C357
C358
C365
C366
C367
C368

And replaced by two capacitors 10UF 250V
Of

VISHAY ROEDERSTEIN - MKT1813610255GQ - CAP, FILM, 10UF, 10%, 250V, AXIAL



Minus of capacitor C357
Plus a capacitor to C360

Minus of capacitor C355
Plus a capacitor to C359


the 2 op amps op275 ( ic216 . ic217 )


I replace next week to op amp -AD826



The mode power supply



Four diodes
D901-D904

I changed to
VISHAY SEMICONDUCTOR - VS-ETX0806FP-M3 - DIODE, HFAST RECT, 600V, 8A, TO220FP

the capacitor c905 - 47uf 400v
i changed to
RUBYCON - 450CXW220MEFC18X50 - CAPACITOR, 220UF, 450V, 20%, 18X50MM



the capacitor c914 2200uf 6.3v

i changed to
RUBYCON - 25ZLH2200MEFC12.5X30 - CAPACITOR, 2200UF, 25V


the capacitor c915. c917 -1200UF 16V
i changed to
RUBYCON - 35ZLH1200MEFC12.5X25 - CAPACITOR, 1200UF, 35V




the capacitor c950 220uf 16v

i changed to


RUBYCON - 16ZLH220MEFC6.3X11 - CAPACITOR, 220UF, 16V





the capacitor c958 . c959 220uf 16v
i changed to
RUBYCON - 35ZLH470MEFC10X16 - CAPACITOR, 470UF, 35V

the capacitor c928 470uf 6.3v
i changed to


RUBYCON - 35ZLH470MEFC10X16 - CAPACITOR, 470UF, 35V



To be continued

Last edited by dazzz; 18th September 2013 at 02:14 AM.
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Old 18th September 2013, 03:08 AM   #3
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To be continued


Pls do!
__________________
I'm not crazy, my mother had me tested
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Old 22nd September 2013, 02:09 PM   #4
dazzz is offline dazzz  Israel
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Join Date: Apr 2013
More improvement that I made to the audio circuit DENON DVD 2900
Today I made a point to point wiring to the audio circuit
I used wire cable NEOTECH 3001
(Yellow in photo)
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Old 23rd September 2013, 02:04 PM   #5
dazzz is offline dazzz  Israel
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more photo
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Old 29th September 2013, 02:03 PM   #6
dazzz is offline dazzz  Israel
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https://www.youtube.com/watch?v=bEHPzb7v6rI
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Old 6th October 2013, 12:42 PM   #7
dazzz is offline dazzz  Israel
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Join Date: Apr 2013
Today I Received all the parts I ordered to continue the project
On the 2900
I replaced on the power supply all capacitors to RUBYCON ZLK
And the coil L950 from 4.7UH
to
BOURNS - 2318-V-RC 330UH


I replaced on the audio circuit the OP AMP -OP275
IC216
IC217

To AD826
and All blue film capacitors capacitors replaced to LCR

4 legs of the DENON
i Replaced to the feet of
BDR
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File Type: jpg IMG_0131.jpg (570.4 KB, 38 views)

Last edited by dazzz; 6th October 2013 at 12:46 PM.
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Old 12th October 2013, 03:42 PM   #8
dazzz is offline dazzz  Israel
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I changed the I/V OP AMP
NJM2068
to AD4562
In addition i add l film capacitors between
V +
To
V-
on each op amp (leg 4 to leg 8 )
i used a capacitor of VISHAY MKP1830
470PF
(At first I used a value of 10NF but it affected by the sound tone is soft)
Next Step replacing all resistors in the audio circuit
VISHAY DALE 1 to%
And all the ceramic capacitors
to film capacitor of
VISHAY MKP1837
- 0.1 UF
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Old 30th October 2013, 03:30 AM   #9
tube-it is offline tube-it  United States
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Really looking forward to your listening impressions. I have a Denon 2900 that has been retired to my man cave 2 channel tube audio setup. It's already a fantastic sounding player but the gear it's hooked up would take advantage of every inch of quality I could squeeze from this thing.
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Old 31st October 2013, 07:53 PM   #10
dazzz is offline dazzz  Israel
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Join Date: Apr 2013
I finished the project on the DENON 2900

I changed the OP AMP filtering
IC 317
IC 318


BA15218
To
OPA1662

The change is much more fast response
The sound is much more dynamic.

After that I replaced all the Carbon resistors
to Film resistors
of
VISHAY DALE 1%

I replaced the ceramic capacitors
C316
C317
C318
C318

film capacitors to LCR- FILM CAPACITOR - 2200PF

The final test that I promised
I changed the
Output capacitors
From
VISHAY 1813MKT-10UF
To
VISHAY 735P MKP-10UF

The 735P
Produce sound is quite different in 1813
The sound produced in 1813 more
With Treble
And clean
The 735P
Give a completely different sound
More fully
The sound got more energy especially rock music

One last thing I added
Cable that provides power to the audio circuit I added a
FERRITE CORE
FILTER
of
FAIR-RITE - 0431164951 -
4.9mm
Material Grade 31 --- 1mhz-300mhz
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Last edited by dazzz; 31st October 2013 at 08:04 PM.
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