If we are talking about there newer model, the grey one PD-06-J, then it has a pair of BB PCM1738 according to a thread at our Swedish forum. The OPs used are NJM5532
An externally hosted image should be here but it was not working when we last tested it.
>If we are talking about there newer model, the grey one PD-06-J, >then it has a pair of BB PCM1738 according to a thread at our >Swedish forum. The OPs used are NJM5532
Then it is not a proper SACD player, as it is converting DSD to PCM for conversion. Great sounding chip, but not as good as playing SACD through genuinely DSD conversion.
Then it is not a proper SACD player, as it is converting DSD to PCM for conversion. Great sounding chip, but not as good as playing SACD through genuinely DSD conversion.
pd d6
All the above is true. I bought this player at reaonable price from Melbourne because it is relatively easy to modify and I already have all the necessary parts except for a clock. Off the shelf it is not a bad player in its price range but simple mods carry the potential of turning it into something really nice.
The analog section has three njm5532 soic opamps which can be replaced with Brown Dog soic adaptors and then one has quite a number of possibilities. I intend to try ths4031ID and ad844 for IV stage and opa627 at the output.
The output 47uF caps will be replaced with Black Gate 100uF caps paralelled with 2.2uF polypropylenes. A few other electros will also be upgraded. The next more expensive step is to upgrade the clock. To do above I'll wait a few more months as the player is only 3 months old and still on warranty.
Screening transformers is the only thing one can do without affecting warranty as screening can be easily removed.
cheers,
All the above is true. I bought this player at reaonable price from Melbourne because it is relatively easy to modify and I already have all the necessary parts except for a clock. Off the shelf it is not a bad player in its price range but simple mods carry the potential of turning it into something really nice.
The analog section has three njm5532 soic opamps which can be replaced with Brown Dog soic adaptors and then one has quite a number of possibilities. I intend to try ths4031ID and ad844 for IV stage and opa627 at the output.
The output 47uF caps will be replaced with Black Gate 100uF caps paralelled with 2.2uF polypropylenes. A few other electros will also be upgraded. The next more expensive step is to upgrade the clock. To do above I'll wait a few more months as the player is only 3 months old and still on warranty.
Screening transformers is the only thing one can do without affecting warranty as screening can be easily removed.
cheers,
Re: pd d6
Just use good sounding fet input opamps then you'll have virtually zero dc offset, eg. AD825's OPA627's OP275's and forget about any coupling caps, no matter how good they are, DC coupling s**** on them. Even more so I find than changing from the poor old NE5532 to an "audiophile highend opamp" as above, nothing screws up the sound more than a cap in the signal path.
My 2 bobs worth
Cheers George
janusz said:
Just use good sounding fet input opamps then you'll have virtually zero dc offset, eg. AD825's OPA627's OP275's and forget about any coupling caps, no matter how good they are, DC coupling s**** on them. Even more so I find than changing from the poor old NE5532 to an "audiophile highend opamp" as above, nothing screws up the sound more than a cap in the signal path.
My 2 bobs worth
Cheers George
caps in audio path
Hi George,
No caps in audio path is THE ideal solution. I completely agree. If I manage to get offset low enough then I'll get rid of output caps. PCM1738 is not bad in this repect and there are no caps between it and the opamps.
However, I haven't done any measurements yet. I haven't even removed the cover to take a look inside. There was no need as I downloaded a few pics from the net and bought a service manual before making the final decision.
From interviews I read earlier I knew it had two PCM1738s so considering the price offer (A$550 including shipping - maybe because it is silver) most likely I would have bought it anyway. When I went through schematics I knew it was almost ideal for basic but rewarding mods.
The only unknown was the quality of the drive. I'd prefer pioneer's stable plater, which is very reliable (my 14 years old pd-s801 still works like new) and no need for frequent cleanning of lenses but hopefully this drive will also work well for a long time.
cheers,
Hi George,
No caps in audio path is THE ideal solution. I completely agree. If I manage to get offset low enough then I'll get rid of output caps. PCM1738 is not bad in this repect and there are no caps between it and the opamps.
However, I haven't done any measurements yet. I haven't even removed the cover to take a look inside. There was no need as I downloaded a few pics from the net and bought a service manual before making the final decision.
From interviews I read earlier I knew it had two PCM1738s so considering the price offer (A$550 including shipping - maybe because it is silver) most likely I would have bought it anyway. When I went through schematics I knew it was almost ideal for basic but rewarding mods.
The only unknown was the quality of the drive. I'd prefer pioneer's stable plater, which is very reliable (my 14 years old pd-s801 still works like new) and no need for frequent cleanning of lenses but hopefully this drive will also work well for a long time.
cheers,
pd d6
No, there is one PCM1738 DAC per channel.
The signal from the pickup goes to the main SACD/CD decoder MT1389EE/B2-L. Then, from the main decoder, it is taken to digital output circuits (optical and coaxial) and to PD0274A L/R channel PCM. Then there is one TC74VHC157FTS1 (PCM/DSD), fed from both PD0274a and main decoder, per channel followed by one PCM1738EG3 per channel.
Then the I/V conversion stage uses dual njm5532 per channel and final amplification and filtering is done by one njm5532 shared by both channels.
Unfortunately my Acrobat reader does not allow to take a snap shot of pages (I have the manual in pdf format as well) so I cannot show bits of diagrams and schematics here.
cheers,
No, there is one PCM1738 DAC per channel.
The signal from the pickup goes to the main SACD/CD decoder MT1389EE/B2-L. Then, from the main decoder, it is taken to digital output circuits (optical and coaxial) and to PD0274A L/R channel PCM. Then there is one TC74VHC157FTS1 (PCM/DSD), fed from both PD0274a and main decoder, per channel followed by one PCM1738EG3 per channel.
Then the I/V conversion stage uses dual njm5532 per channel and final amplification and filtering is done by one njm5532 shared by both channels.
Unfortunately my Acrobat reader does not allow to take a snap shot of pages (I have the manual in pdf format as well) so I cannot show bits of diagrams and schematics here.
cheers,
There is a nice site that discusses the modding of the Pioneer PD-D6.
http://www.passion-tube.fr/sacd-passion/avant-propos-sacd-fr.htm
http://www.passion-tube.fr/sacd-passion/avant-propos-sacd-fr.htm
PCM58P
PCM58P
Hi Ruach.
Do you still have PCM58P available?
If so what price?
I need 2 IC's.
Thanks,
Eugene.
mail@conusaudio.com
PCM58P
Hi Ruach.
Do you still have PCM58P available?
If so what price?
I need 2 IC's.
Thanks,
Eugene.
mail@conusaudio.com
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