fourbanks

Sony MDS-JB 940 Static Mini Disc Player (fault)

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You cannot put the 920 disk unit into the the 940. Sorry.

Hi Stephen

will we be able to put the 940 display unit into the 920 ? making it look like new ?

 

Edited by fourbanks

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Unlikely. The 920 doesn't support MDLP, but the 940 display has all kinds of stuff to do with that hardwired into the display.

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Unlikely. The 920 doesn't support MDLP, but the 940 display has all kinds of stuff to do with that hardwired into the display.

is the SONY MDS-JB930 QS a step up to the JB 920QS or the equivalent to the 940 ? do you know 

Also Sony MDS-JB730 QS Black High-End Minidisc Deck what is this machine like ? 

http://www.ebay.co.uk/itm/Sony-MDS-JB730-QS-Black-High-End-Minidisc-Deck-MINT-Condition-/181882628629?hash=item2a590caa15:g:wjcAAOSw9r1WBTVI

Edited by fourbanks

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None of the x30 decks support MDLP.

http://minidisc.org/part_Sony_MDS-JB730.htmli will have some spares for a later date if needed ?

 

I have decided to get another JB940 so that i will have the spare parts for the future as it is a good deck overall and will keep the belt in case it's needed at some point

As for me fitting it then no i will pass on that as my dealer says he's more then capable  

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i dont know why sony didnt use cog wheels here

seems a foolish design decision?

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very sorry to hear it didn't go well :(

one of those things working in a area that's delicate 

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its a shame no one here can give  definative info  regarding which decks use the same transports then you might have been able to buy a cheaper deck and transplant the mechanism, which was my question above. Certainly this  rubber band  issue makes you wonder how long these  decks will last as the assumption was that left unused they would be ok? now we know that there was a countdown from new? just because of a silly little  rubber band!

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It's all in the service manuals, Freddy. They've been posted at minidisc.org for years now. There are plenty of cog wheels already in the mechanisms - I think the rubber belts were/are a good engineering solution. All CD players and DVD drives use them in some form or other.

As to which drives can be transplanted, of course one can make a list. But all that is required is a $5 belt.

Nick, did you omit to remove the disk before disassembly? I'm sorry, I omitted that from my instructions.

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It's all in the service manuals, Freddy. They've been posted at minidisc.org for years now. There are plenty of cog wheels already in the mechanisms - I think the rubber belts were/are a good engineering solution. All CD players and DVD drives use them in some form or other.

As to which drives can be transplanted, of course one can make a list. But all that is required is a $5 belt.

Nick, did you omit to remove the disk before disassembly? I'm sorry, I omitted that from my instructions.

i did not Stephan which was a bad error on my part as at the time it would not come out where as before he had albeit hit and mis 

as i say i hope to get hold of a newish 940 and i will now have some spare parts if needed i will let you know when i get hold of the new one although it may take some time 

is this model any good do you know

http://www.ebay.co.uk/itm/Sony-MDS-JB730-QS-Black-High-End-Minidisc-Deck-MINT-Condition-/181882628629?hash=item2a590caa15:g:wjcAAOSw9r1WBTVI

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I got a JB940 earlier this year, which on occasion exhibited this problem of not ejecting the disc. Usually it would work fine, but if it had been turned off for a while with a disc inside, after turning it on the eject mechanism would make a slipping sound and the disc wouldn't come out until after several tries. I guess the slightly lower temperature inside when it had been turned off for a while had something to do with it.

I replaced the belt just now. I was a bit hesitant to do it, because the deck would mostly function fine, but It is indeed dead simple. After removing the mechanism, the belt is easily accessible from the front and can be replaced with a little help from a highly specialized tool.

P.s.: I just noticed I took the picture of the mechanism after I had already removed the belt. It goes around the two white wheels you can see on the front left.

JB940-1b.jpg

JB940-2b.jpg

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that's good to hear you were successful 

Edited by fourbanks

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its a shame no one here can give  definative info  regarding which decks use the same transports then you might have been able to buy a cheaper deck and transplant the mechanism, which was my question above. Certainly this  rubber band  issue makes you wonder how long these  decks will last as the assumption was that left unused they would be ok? now we know that there was a countdown from new? just because of a silly little  rubber band!

i have a very rare cd recorder from marantz that skips for the first 5 minutes of playing but woks perfectly after that so i'm leaving alone just to be on the safe side 

http://www.hifiengine.com/files/images/MARANTZ DR6000 CD RECORDER PLAYER.jpg

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It's all in the service manuals, Freddy. They've been posted at minidisc.org for years now. There are plenty of cog wheels already in the mechanisms - I think the rubber belts were/are a good engineering solution. All CD players and DVD drives use them in some form or other.

As to which drives can be transplanted, of course one can make a list. But all that is required is a $5 belt.

Nick, did you omit to remote the disk before disassembly? I'm sorry, I omitted that from my instructions.

I wonder  how long the the rubber bands will be available for? That website mentioned only had 65 left ( I bought 5 just in case ) then what?

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5 belts will last at least 20 years i think the main thing is to make sure that any spare parts are kept in good storage. i'm hoping my next unit will be like new so that i'll have most of the spares for it from my unit i just broke 

a hard lesson learned and at the age of 60 i haven't done to bad in this hobby the only other error i have made was getting rid of jvc vhs machine on an easily rectified fault for a new super vhs machine thinking it would be better to buy new then pay out 70 pounds on a 5 year old player and i was wrong as little did i know that i had bought the best vhs machine ever built as most of the internal components were that of it's bigger brother from the super vhs model and made in japan and the new model i purchased had come about at the start of downturn in japan and was now made in Germany and with regret and i have the 2 top German players not as good as my standard vhs 

I think all of us have made errors at some point the idea is if you can learn from mistakes then you can then pass your knowledge onto others and with confidence 

 

 

 

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i did not Stephan which was a bad error on my part as at the time it would not come out where as before he had albeit hit and mis 

Then my bad. I did urge you not to wait - of course what happened was you waited until the disk was firmly stuck in the unit. I will edit my instructions just in case....

It's not difficult to get the hinged part off. But with a disk in there, it was doubtless locking and jamming everything and you probably bust the overWRITE head (it's electrical, and is nothing to do with LIGHT, just someone back East mixing up their l's and r's in writing the manual) which is easy to do.

You CANNOT use the 730, it doesn't do MDLP, and it won't fit in the 940. I thought I already pointed this out, sorry (again) if I did not in fact.

Five belts will only last 20 years if you keep them in the DARK as was pointed out to me in my very last communication from Jim.

Edited by sfbp

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thats why I berate the use of a small special purpose  rubberband for such a non audio action, that will render the deck frustratingly useless( every thing else working),  whereas some gears/cogs would have done much better and would I bet have worn better as the insert/ejection process not some thing that happens frequently,  & wouldnt have worn out  just by being inactive? You can bet I ll be storing the rubber bands in the black hole of calcutta. As I have 4 decks I may need to get more..... Will see what the first ones are like.

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Then my bad. I did urge you not to wait - of course what happened was you waited until the disk was firmly stuck in the unit. I will edit my instructions just in case....

It's not difficult to get the hinged part off. But with a disk in there, it was doubtless locking and jamming everything and you probably bust the overWRITE head (it's electrical, and is nothing to do with LIGHT, just someone back East mixing up their l's and r's in writing the manual) which is easy to do.

You CANNOT use the 730, it doesn't do MDLP, and it won't fit in the 940. I thought I already pointed this out, sorry (again) if I did not in fact.

Five belts will only last 20 years if you keep them in the DARK as was pointed out to me in my very last communication from Jim.

is the JB 730 any good in case i'm unlucky in getting hold of a 940 i know the parts wont work in it but i'm after a good unit so may have to get hold of anything that's at least as good as the 940 

i have my old 920 special edition and might even get hold of one of those if needed as it's been a superb unit but with the display fading to a level i can no longer see it 

it still works well none the less but at at least 15 years old it will pack up at some point i'm sure 

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IT DOESN'T DO MDLP, so in no sense is it a replacement for the 940.If you don't care about MDLP then the 920 and 930 will be better models than the 730.

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IT DOESN'T DO MDLP, so in no sense is it a replacement for the 940.If you don't care about MDLP then the 920 and 930 will be better models than the 730.

thanks Stephen 

Edited by fourbanks

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I see there is on ebay uk this  jb940 going -

http://www.ebay.co.uk/itm/Sony-Minidisc-player-MDS-JB940-/252136955041?hash=item3ab4889ca1:g:i-EAAOSwAYtWKRez

 

has a scratched  case but maybe transplant the mechanism? the scratched case may keep the price lower?

 

 seems like prices in general have gone up very much - I bought my 2 spare JB940 a couple of years ago for about £70-80 each.

 

I saw this advert. is this the bit that broke?

http://www.ebay.co.uk/itm/Sony-MDS-JB-940-MD-Losch-und-Schreibkopf-Head-over-Light-NEU-/140989709713?hash=item20d3a43d91:g:qWUAAMXQ9qpRXYyb

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I see there is on ebay uk this  jb940 going -

http://www.ebay.co.uk/itm/Sony-Minidisc-player-MDS-JB940-/252136955041?hash=item3ab4889ca1:g:i-EAAOSwAYtWKRez

 

has a scratched  case but maybe transplant the mechanism? the scratched case may keep the price lower?

 

 seems like prices in general have gone up very much - I bought my 2 spare JB940 a couple of years ago for about £70-80 each.

 

I saw this advert. is this the bit that broke?

http://www.ebay.co.uk/itm/Sony-MDS-JB-940-MD-Losch-und-Schreibkopf-Head-over-Light-NEU-/140989709713?hash=item20d3a43d91:g:qWUAAMXQ9qpRXYyb

thanks freddy i may go for this i'm going to keep an open mind and yes that was the part that broke so that to could be another angle to look at. if a did go down this route tho i would get the complete lens 

i'm looking at this also but my gut feeling here this will reach top money 

 http://www.ebay.co.uk/itm/SONY-MDS-JB940-QS-Minidisc-Deck-Remote-Excellent-Condition-99p-NR/121794562101?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33840%26meid%3Dfb290ee7bc13428d876882b293b098ae%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D252136955041

also what is the difference between the uk model and the copper screws and the EU model ?

Edited by fourbanks

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yes and still 6 days to go.  will go for some silly price.  I think the time gone now for cheap ones on Ebay?

"UK Edition" which according to Sony is "specially tuned for British ears".  I think they tweaked the insides a bit the odd component. don't know if was much of a difference. I suspect compared to hifidelity these days a bit of a joke? I anyway  run all my digital thru a new Audiolab 8200CDQ  dac I  just  got  at an end of line price reduced from £1000 to £600 so any  changes to the audio circuitry irrelevant.

 

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Nick, you won't be able to install the laser. Jim can do it. I can do it. Your electronic friend probably WON'T be able to.

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