Walbaum
New Head-Fier
- Joined
- Apr 9, 2008
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(I'm not quite sure if this thread belongs here or in the DIY forums - please move it if necessary)
Since I've first read the press release on the new line of Sony players, my interest on them has been rapidly growing. Unfortunately, the A82x and A72x still aren't available in my country. Due to my investigative (or, if you will, geeky) nature, I decided to spend the time of anticipation on gathering as much information on these players as possible.
This is how I ended with a small collection of some fairly available PDFs, of which the service manual is undoubtedly the most interesting. I was curious if there were any possibilities of modifying the players, especially when it comes to sound quality improvements (other than dreadful "effects" kindly provided by Sony) and memory upgrading. The latter was particularly important for me: what is the point of buying an expensive player if it can become outdated in no time because of limited storage capacity? I've seen tutorials on mounting new flash memory cards on Rio Karma, several Zen players and even on an iPod, so definetely in some cases such user-side upgrad is possible.
There comes the most dumb and irritating part of my post: although I enjoy reading complicated technical documents, my actual technical knowledge about electronics is - at best - extremely vague (and the fact that I don't actually own any of the players I'm so interested about makes me look only dumber). Therefore: I think I made some interesting and intriguing observations, but frankly I don't know if I understand things correctly. It's even possible that I'm completely wrong. So that's why I'm starting this thread: I'd like to ask you if I'm properly interpreting the following parts of the manual, or am I just imagining things and should find something better to do. Now to the details...
Recommended reading: page 27 of this thread on ATRACLife forums (link to PDF with service manual is somewhere there).
Since I've first read the press release on the new line of Sony players, my interest on them has been rapidly growing. Unfortunately, the A82x and A72x still aren't available in my country. Due to my investigative (or, if you will, geeky) nature, I decided to spend the time of anticipation on gathering as much information on these players as possible.
This is how I ended with a small collection of some fairly available PDFs, of which the service manual is undoubtedly the most interesting. I was curious if there were any possibilities of modifying the players, especially when it comes to sound quality improvements (other than dreadful "effects" kindly provided by Sony) and memory upgrading. The latter was particularly important for me: what is the point of buying an expensive player if it can become outdated in no time because of limited storage capacity? I've seen tutorials on mounting new flash memory cards on Rio Karma, several Zen players and even on an iPod, so definetely in some cases such user-side upgrad is possible.
There comes the most dumb and irritating part of my post: although I enjoy reading complicated technical documents, my actual technical knowledge about electronics is - at best - extremely vague (and the fact that I don't actually own any of the players I'm so interested about makes me look only dumber). Therefore: I think I made some interesting and intriguing observations, but frankly I don't know if I understand things correctly. It's even possible that I'm completely wrong. So that's why I'm starting this thread: I'd like to ask you if I'm properly interpreting the following parts of the manual, or am I just imagining things and should find something better to do. Now to the details...
- Enabling line-out. Apparently, after pressing a combination of buttons resembling those for Street Fighter/Mortal Combat secret attacks, the service staff - or one very curious user - can access the "Test Mode". This provides access to a variety of options, and among them - audio options. Once in the audio menu, Press the [VOL+] key to switch the HP/LINE, says the manual. Q: Could it mean that it would be possible to change the function of headphone output to the proper line-out? If yes, it easily makes an almost-killer feature of A7x/A8x.
- Mysterious variables. It seems that in "Test Mode" one can turn on/off two variables: "AVLS" (somehow connected with the maximal output, manipulates the output volumes) and "sound pressure regulation". Q: Any ideas what does it mean? Can it have any significance from the "audiophile" point of view?
- Enigmatic adjustments. We can also adjust "Clear stereo setting (with or without cable)" and the DAC settings: BASS-Gain/FC and TREBLE-Gain/FC. According to the user's manual, the "Clear Stereo" function enables individual left and right digital processing of the sound and can be turned on/off from the normal settings panel (in "Test Mode" it can be adjusted). I also wonder how messing with those hidden DAC settings can differ from using an equalizer. Q: Basically, the same as in point 2.
- No memory upgrade possibility? There are two NAND flash memory units mounted on the main board, manufactured either by Toshiba or Samsung (depends on model), called by their pet names IC751 and IC752, and also known as TH58NVGxD1DTGxx. They are accessible and easy to localize on the board. There is a note, however, that tends to ruin my sweet dreams about future memory upgrading: IC751 and IC752 on the MAIN board cannot exchange with single. When IC751 and IC752 on the MAIN board are damaged, exchange the entire mounted board. Q: So, everything's integrated and no DIY memory upgrades for us, period?
Recommended reading: page 27 of this thread on ATRACLife forums (link to PDF with service manual is somewhere there).
