Thank you, this made the job very easy! My JB940 developed this issue and at first I thought I had no chance of bringing it back. Found your video, found the new belt online, replaced it yesterday and it’s working perfectly. I have already started using Audacity to get some recordings from my discs that I know I can’t ever get anywhere. I’m a happy camper! Many thanks!!!!
Followed your procedures exactly, worked perfectly, thanks. MD now working as it should. I did not need to remove the data cables, I used a wife instead holding the mech open as I looped the new belt on. Invaluable!
Update: As i said, after the replacement of the loading belt the deck worked perfectly - for about four days. Now I've got more problems. Today suddenly the deck does not respond when the start button is pressed. The indicator glows proving that the power is there, but all I get is a tiny red "TOC" symbol flashing on the display. Further investigation might be beyond my powers.
Once again a big thank you Nick for your video and for you support, belt changed easy the player now eject the disc nice and smooth. 😀 Also I have changed the belt for the Sony SACD player. The tray opens and close perfect. Keep up the good work!
I trashed my JB940 deck by following the advice given in this video. It should have been made clear that you remove the transport ONLY as a last resort and that the belt can be changed without taking that risk. I bought another JB940 on eBay and am happy at last. It has taught me an expensive lesson.
Hi Alan. sorry to hear you had the same problem that I had. My deck was trashed too and it is clear that the transport does not need to be removed to change the belt. You only have to slightly damage one of the ribbons while removing and reinstalling the transport and the deck will no longer work. I asked the UA-camr to update his video but he obviously did not. If he had have you would have been saved from trashing your deck by following the video. PS. Keep your old deck for spares. You never know when you will need a component that could fail in the future on the new deck.
@@racl1954 Thanks. I was gutted when I wrecked my deck ( unnecessarily ) but am delighted to have an exact replacement. Yes, I've kept the old one just in case.
@@AlanJan_UK_49 I have found a good electronics engineering company who are going to look at my one, replace the ribbons and give it a service. I think it is worth the trouble as my one looks like it just come off the production line. This isn't the first time I have followed some twats video and ruined a piece of equipment. I had the same thing happen to my Roland synth with a video tutorial from a prat who did not know what he was doing and shared his crap online to show others how to screw their keyboards up.
@@racl1954 That sounds good. If you use them and find them good do please let me know. I have an excellent Audiolab 8000Q preamp that needs the lid off but after my MD efforts I'm steering clear !
@@AlanJan_UK_49 Hi Alan. I did take some time finding this company and was lucky that they are local. One of the reasons for my suing them is I have an old 1970s Sansui 9090 receiver that I want them to service. It was difficult finding anyone local that I could completely trust with this relic. I am taking both in to be serviced the first week after Christmas. I will let you know how I get on. Is there a way that I can contact you without going through the UA-cam Chat which could get lost along the way ?.
The drive seems to be identical to my Je640, thougt the QS series might use more advanced one. The main difference seems to be the linear powers supply(at least i think so) with a R core transformer where my has a simple Switch mode board.
I have 2 decks from different generations, and 1 still works good, the other same issue. With the amount of mini disc decks that Sony made I have no idea why they couldn't make a better eject mechanism
Hi Nick. Thanks for sharing this. I have the same player that had the same problem as yours. The disc wouldn't eject but it was playing OK. Just stuck in the tray. I removed the disc tray the same way that you did. When I replaced it back as it was, it wouldn't work. I just get a continual clicking noise as described below by another owner who has the same clicking problem. I didn't do any rough handed work. I even wore an anti static wrist strap while working on it. You have mentioned below in one of your answers to a question that it could be "the relay that turns on/off power to the main circuit/display, controlled by a microcontroller and its own small power supply."...........As I said my one was working OK until I changed the small belt. Do you have any idea what the problem could be ?. I am thinking maybe I have damaged a ribbon. In hindsight I should have left the disc tray in the until and not removed it. It is quit easy to change the belt without removing the tray mechanism and risking damaging the ribbons.
Sadly I don't have any great advice. You could be right that it might be safer not to disconnect the cables if you can access everything you need to. Can you hear exactly where the click is coming from? Does the main display turn on? If so, that would imply that it's not a short that is stopping that. Have you taken the cables out again and check with a magnifier for any obvious damage?
@@nicksmith4507 Hi Nick. Thanks I am going to order new ribbons for it. I will install everything back with the new ribbons and let you know the result. Shame if I can't get it working. It is in time warp condition.
@@nicksmith4507 Hi Nick. Please go the other route and advise a solution where the mechanism and ribbon cables do not need to be disconnected. My player was literally trashed following this advice. I have ended up paying £80.00 + to have mine repaired with new ribbon cables and a board component that was damaged. I paid this as my player is in mint condition. Changing the belt does not require removing any mechanism or disconnection of ribbon cables. Please update your video. It is misleading.
@@nicksmith4507 I had no idea which is why I went on to UA-cam looking for the advice offered by those that think they know better to a point where they put up instructional videos showing others how to do something. This change of belt routine may have worked for you but it is not good advice for others. I am not ham fisted or careless. I followed your instruction carefully. My point is the job could have been done without dismantling anything and risking any damage.
Hi there I have a mds jb940 with no power when I switch it on there is no power but there's a clicking sound Coming from a black box in between the two transformers. Any ideas what it could be please. I'm in North Wales UK
The click is from the relay that turns on/off power to the main circuit/display, controlled by a microcontroller and its own small power supply. More than that, I can't say, I am afraid - it would take some careful analysis of the schematic and testing at various points in the circuit.
Hi Nick. Thanks for your video. I have received an unexpected present from a friend, the same player like yours with exact the same problem. I have order the belt and hope to solve the problem. The player is ok but to force the eject I insert other disc and push gently the one inside.
@@nicksmith4507 a really nice friend. He gave me also a Sony SACD player model SCB XB770. This one as well, has almost the same issue like the MD: the CD tray doesn't stay close. It goes inside but when I press "Play" it opens again. Do you know by any chance what is the problem?
@@cornelbaluta I am not familiar with that model but general suggestions: have a look inside and check belts for degredation or cogs that have become cracked or broken. If there is old lubricant, that can sometimes become hard and needs to be removed. There may be a sensor switch that is triggered at the wrong point or not at all.
@@nicksmith4507L.E. This comment is about Sony CD player SCD XB 770. I've looked inside and the problem is the same: the belt from the motor who opens the tray is very loose and almost broken. I will try to find one on eBay. Have a nice Sunday!
May I ask what grease do you use, alway unsure of what to use on this stuff. My 940 started to not eject today it will take the disc but won't come out so I assume my belt might be going. Where did you source the belt?
I have used some clear silicone grease in the past but sometimes it seems a bit too sticky. I got some different white grease but I can't remember what it is exactly (label came off the tin) and that's less viscous. You can always try a spot of light oil too: just a thin coating is all that should be necessary. As for the belt, just search eBay for the model number: it should come back with some hits.
@@nicksmith4507 Thank you for the info, found the belt :). Will try some 3-1 oil I have, Nit sure I need any yet but as im inside doing the belt I figured why not.
mine has the same , i ordered new belt today, hopefully it'll arrive soon and can replace it, thanks for the informative video, nicely done! Although your belt looks slightly different (rounded) where did you get it?
@@aim6mac I found the one I bought: www.ebay.co.uk/itm/NEW-REPLACEMENT-BELT-FOR-SONY-MINI-DISC-MDS-JB980-JB940-JE780-JE770-JE640/203197391959?hash=item2f4f822457:g:xVMAAOSw7IpbS3Tn
@@nicksmith4507 thanks alot, it's the same as i ordered, and i replaced it and it works perfectly, the unit is sold already :p the buyer is really happy!
@@nicksmith4507 *Thank you so much !* I have the exact same problem and would hate to lose this deck. I love the sound of my minidiscs. I've just ordered from your link and hope I can fix it.
Thank you, this made the job very easy! My JB940 developed this issue and at first I thought I had no chance of bringing it back. Found your video, found the new belt online, replaced it yesterday and it’s working perfectly. I have already started using Audacity to get some recordings from my discs that I know I can’t ever get anywhere. I’m a happy camper! Many thanks!!!!
Cool!
Followed your procedures exactly, worked perfectly, thanks. MD now working as it should. I did not need to remove the data cables, I used a wife instead holding the mech open as I looped the new belt on. Invaluable!
Update: As i said, after the replacement of the loading belt the deck worked perfectly - for about four days. Now I've got more problems. Today suddenly the deck does not respond when the start button is pressed. The indicator glows proving that the power is there, but all I get is a tiny red "TOC" symbol flashing on the display. Further investigation might be beyond my powers.
Once again a big thank you Nick for your video and for you support, belt changed easy the player now eject the disc nice and smooth. 😀
Also I have changed the belt for the Sony SACD player. The tray opens and close perfect.
Keep up the good work!
I trashed my JB940 deck by following the advice given in this video. It should have been made clear that you remove the transport ONLY as a last resort and that the belt can be changed without taking that risk. I bought another JB940 on eBay and am happy at last. It has taught me an expensive lesson.
Hi Alan. sorry to hear you had the same problem that I had. My deck was trashed too and it is clear that the transport does not need to be removed to change the belt. You only have to slightly damage one of the ribbons while removing and reinstalling the transport and the deck will no longer work.
I asked the UA-camr to update his video but he obviously did not. If he had have you would have been saved from trashing your deck by following the video. PS. Keep your old deck for spares. You never know when you will need a component that could fail in the future on the new deck.
@@racl1954 Thanks. I was gutted when I wrecked my deck ( unnecessarily ) but am delighted to have an exact replacement. Yes, I've kept the old one just in case.
@@AlanJan_UK_49 I have found a good electronics engineering company who are going to look at my one, replace the ribbons and give it a service. I think it is worth the trouble as my one looks like it just come off the production line.
This isn't the first time I have followed some twats video and ruined a piece of equipment. I had the same thing happen to my Roland synth with a video tutorial from a prat who did not know what he was doing and shared his crap online to show others how to screw their keyboards up.
@@racl1954 That sounds good. If you use them and find them good do please let me know. I have an excellent Audiolab 8000Q preamp that needs the lid off but after my MD efforts I'm steering clear !
@@AlanJan_UK_49 Hi Alan. I did take some time finding this company and was lucky that they are local. One of the reasons for my suing them is I have an old 1970s Sansui 9090 receiver that I want them to service. It was difficult finding anyone local that I could completely trust with this relic. I am taking both in to be serviced the first week after Christmas. I will let you know how I get on.
Is there a way that I can contact you without going through the UA-cam Chat which could get lost along the way ?.
Thank you! Got old faithful working again thanks to this guide.
Amazing!!! Where did you order the belt part?
I just searched eBay with "MDS-JB940 belt". You should get some hits :-)
The drive seems to be identical to my Je640, thougt the QS series might use more advanced one. The main difference seems to be the linear powers supply(at least i think so) with a R core transformer where my has a simple Switch mode board.
Very helpful but did you need to remove the screws of the mech in order to unclip the top of the unit?
Nope. Just the screws to be base unit. There is a hingle opposite the clip.
Thank you, magnificent. I am from Brazil.
Actually you can do that without removing the mechanism check Techmoan recent video
I have 2 decks from different generations, and 1 still works good, the other same issue. With the amount of mini disc decks that Sony made I have no idea why they couldn't make a better eject mechanism
Hi Nick. Thanks for sharing this.
I have the same player that had the same problem as yours. The disc wouldn't eject but it was playing OK. Just stuck in the tray. I removed the disc tray the same way that you did.
When I replaced it back as it was, it wouldn't work. I just get a continual clicking noise as described below by another owner who has the same clicking problem.
I didn't do any rough handed work. I even wore an anti static wrist strap while working on it. You have mentioned below in one of your answers to a question that it could be "the relay that turns on/off power to the main circuit/display, controlled by a microcontroller and its own small power supply."...........As I said my one was working OK until I changed the small belt.
Do you have any idea what the problem could be ?. I am thinking maybe I have damaged a ribbon. In hindsight I should have left the disc tray in the until and not removed it. It is quit easy to change the belt without removing the tray mechanism and risking damaging the ribbons.
Sadly I don't have any great advice. You could be right that it might be safer not to disconnect the cables if you can access everything you need to. Can you hear exactly where the click is coming from? Does the main display turn on? If so, that would imply that it's not a short that is stopping that. Have you taken the cables out again and check with a magnifier for any obvious damage?
@@nicksmith4507 Hi Nick.
Thanks
I am going to order new ribbons for it. I will install everything back with the new ribbons and let you know the result.
Shame if I can't get it working. It is in time warp condition.
@@nicksmith4507 Hi Nick.
Please go the other route and advise a solution where the mechanism and ribbon cables do not need to be disconnected. My player was literally trashed following this advice. I have ended up paying £80.00 + to have mine repaired with new ribbon cables and a board component that was damaged. I paid this as my player is in mint condition.
Changing the belt does not require removing any mechanism or disconnection of ribbon cables.
Please update your video. It is misleading.
@@racl1954 Use advice from UA-cam at your own risk. The procedure worked for me. If you have a better idea, feel free to post your own video.
@@nicksmith4507 I had no idea which is why I went on to UA-cam looking for the advice offered by those that think they know better to a point where they put up instructional videos showing others how to do something.
This change of belt routine may have worked for you but it is not good advice for others.
I am not ham fisted or careless. I followed your instruction carefully.
My point is the job could have been done without dismantling anything and risking any damage.
Hi there I have a mds jb940 with no power when I switch it on there is no power but there's a clicking sound Coming from a black box in between the two transformers. Any ideas what it could be please. I'm in North Wales UK
The click is from the relay that turns on/off power to the main circuit/display, controlled by a microcontroller and its own small power supply. More than that, I can't say, I am afraid - it would take some careful analysis of the schematic and testing at various points in the circuit.
Hi Nick. Thanks for your video.
I have received an unexpected present from a friend, the same player like yours with exact the same problem.
I have order the belt and hope to solve the problem.
The player is ok but to force the eject I insert other disc and push gently the one inside.
What a nice friend 😀 It's a great deck but a time sink if you get obsessed with renaming your MDs with consistent text info with a PS2 keyboard...
@@nicksmith4507 a really nice friend. He gave me also a Sony SACD player model SCB XB770.
This one as well, has almost the same issue like the MD: the CD tray doesn't stay close.
It goes inside but when I press "Play" it opens again.
Do you know by any chance what is the problem?
@@cornelbaluta I am not familiar with that model but general suggestions: have a look inside and check belts for degredation or cogs that have become cracked or broken. If there is old lubricant, that can sometimes become hard and needs to be removed. There may be a sensor switch that is triggered at the wrong point or not at all.
@@nicksmith4507 thank you. I will have a look inside maybe I will fix it.
@@nicksmith4507L.E. This comment is about Sony CD player SCD XB 770.
I've looked inside and the problem is the same: the belt from the motor who opens the tray is very loose and almost broken.
I will try to find one on eBay.
Have a nice Sunday!
May I ask what grease do you use, alway unsure of what to use on this stuff. My 940 started to not eject today it will take the disc but won't come out so I assume my belt might be going. Where did you source the belt?
I have used some clear silicone grease in the past but sometimes it seems a bit too sticky. I got some different white grease but I can't remember what it is exactly (label came off the tin) and that's less viscous. You can always try a spot of light oil too: just a thin coating is all that should be necessary. As for the belt, just search eBay for the model number: it should come back with some hits.
@@nicksmith4507 Thank you for the info, found the belt :). Will try some 3-1 oil I have, Nit sure I need any yet but as im inside doing the belt I figured why not.
Need one step before with my JB940: How can I get a disc out, which is stuck inside?
I found I could just gentle push the tray forward with a screwdriver until I could pull the disc
How do you get it open????
What is the belt prodect number I got the same player
Just search on eBay for the Sony model number and you should find a matching belt
mine has the same , i ordered new belt today, hopefully it'll arrive soon and can replace it, thanks for the informative video, nicely done! Although your belt looks slightly different (rounded) where did you get it?
I just did a search on eBay based on the model number. Since it's only the load mech I don't expect the exact shape to be too critical
@@nicksmith4507 the one's i've got are also from eBay, and i think it's the same as yours, made in Germany.
@@aim6mac I found the one I bought: www.ebay.co.uk/itm/NEW-REPLACEMENT-BELT-FOR-SONY-MINI-DISC-MDS-JB980-JB940-JE780-JE770-JE640/203197391959?hash=item2f4f822457:g:xVMAAOSw7IpbS3Tn
@@nicksmith4507 thanks alot, it's the same as i ordered, and i replaced it and it works perfectly, the unit is sold already :p the buyer is really happy!
@@nicksmith4507 *Thank you so much !* I have the exact same problem and would hate to lose this deck. I love the sound of my minidiscs. I've just ordered from your link and hope I can fix it.
Fit a silicone belt it will never go bad again
Where do you get one from ?
When Sony was Sony.