Sony Minidisc deck help

[SteveC]

Hi all

Just bought a Sony Minidisc deck from my local curries for £19.95. Cheap you might think - but it's a deck designed to connect into one of their Micro Hifi's. (It's model number is MDS-SP55)

On the back is just a 19pin connector (and flat cable supplied) which plugs into the tuner of the hifi plus 3 optical connectors (2 in, 1 out).

Now, all I want is to power it up as there are enough controls on the unit itself to use it stand alone. So:

Anyone know the pinout of this 19pin cable? (Or anyone fancy putting a multimeter to the back of their sony micro hifi if they have one?)

Not afraid to open it up and play - only cost £20 after all!

[SteveC]

Opened it up and the port's labelled - now to work out what they mean:

01: TC-R
02: MD-R
03: AGND
04: MD-L
05: TC-L
06: REC-L
07: AGND
08: REC-R
09: GND
10: PCPON
11: PDOWN
12: IIC-CLK
13; DGND
14: IICDATA
15: D +5.6V
16: -UNREG (L)
17: +UNREG (L)
18: MGND
19: +UNREG (H)

[Maggi]

already tried this site ?

http://www.sel.sony.com/SEL/service/conselec/minidisc/

[Maggi]

based on my completely uneducated thoughts, I would try to shorten pin10 to ground for powering on and pin11 to ground for powering down, but what do I know ?

[SteveC]

More info (no equipment here to test, so relying on eyesight):

01: TC-R - N/C
02: MD-R - (small chip) pin ??
03: AGND - Chassis Ground
04: MD-L - (small chip) pin 26 (VOUTL)
05: TC-L - N/C
06: REC-L - (small chip) pin 2 (VINL)
07: AGND - Ground
08: REC-R - (small chip) pin 4 (VINR)
09: GND - Ground
10: PCPON - (big chip) ?
11: PDOWN - ?
12: IIC-CLK - ?
13; DGND - Ground
14: IICDATA - ?
15: D +5.6V - N/C
16: -UNREG (L) - N/C
17: +UNREG (L) - Power Regs
18: MGND - Power Regs
19: +UNREG (H) - N/C

(small chip) = UDA1341TS; Economy audio CODEC for MiniDisc (MD) home stereo and portable applications

http://www-us.semiconductors.philips.com/pip/UDA1341TS

Makes sense for inputs on pins 2 & 4 - they're left and right inputs which go straight to ADCs
Pins 24 and 26 are probably VOUTR and VOUTL - the outputs (ie to the AMP/tape deck) from the MD inputs -> ADCs -> DSP -> DACs

[SteveC]

So I guess that Maggi could well be right, plus the inputs are pretty much sorted as well as the Power lines. Just hope it works without the data lines being used (hopefully that's just for the I2C bus to the main display and control lines elsewhere on the hifi)

[SteveC]

Voltage regs are a 2933 (3.3v) and 7805 (5.0v). The datasheet for the 7805 says that the input has to be typically 2.0v above output, so I'll stick in 7.5v or so and see what happens later

[Ribbit]

I am posting here solely to provide a change of avatar. Please ignore me.

[SteveC]

Works great!

(Pin 9 is also N/C I didn't realise)

Simply connected a ~8v supply (unregulated) to pins 17 and 11, and ground to all the grounds and it worked powered up. The PDOWN (pin 11) taken high turns it on.

Was able to playback/record/erase minidiscs fine - just a nightmare to navigate round the menus when I haven't got the screen on the rest of the hifi to see what I'm doing!

I believe it uses I2C to talk to the rest of the hifi, and isn't that a pretty standard data protocol/format? Might be able to make my own display through my PC or something - but it does work stand alone for now.

Only tried the optical in/out so far - will do analogue soon though. But overall, well worth the £20 and a little investigative work.

[ZokesPro]

Originally posted by SteveC
Works great!

(Pin 9 is also N/C I didn't realise)

Simply connected a ~8v supply (unregulated) to pins 17 and 11, and ground to all the grounds and it worked powered up. The PDOWN (pin 11) taken high turns it on.

Was able to playback/record/erase minidiscs fine - just a nightmare to navigate round the menus when I haven't got the screen on the rest of the hifi to see what I'm doing!

I believe it uses I2C to talk to the rest of the hifi, and isn't that a pretty standard data protocol/format? Might be able to make my own display through my PC or something - but it does work stand alone for now.

Only tried the optical in/out so far - will do analogue soon though. But overall, well worth the £20 and a little investigative work.

Glad to be of help!

[WyWyWyWy]

Now the question is where did you get it for twenty quid!?

[SteveC]

Originally posted by WyWyWyWy
Now the question is where did you get it for twenty quid!?

My local Currys. Dunno if Dixons have them too.

Drilled a few holes and fitted some phono plugs (line in and out) and a power socket on it now too

[Colin Morey]

coolies, must get me one of them, wonder how hard it would be to get one working..

I only need it for playing,.. I've got an MZ-N1 for recording/editing purpoises

C

[SteveC]

easy - most of what you need is in my posts above, but if you need any more help, drop me a mail.

[Colin Morey]

and £20 from currys, hmm, parhelia from scan's today only or a mini-disk for the hi-fi... is this a special offer, or are they likely to have them at the end of the month?