mdenter Posted September 30, 2017 Report Share Posted September 30, 2017 My minidisc deck MDS-JB940 quit ejecting discs a couple years ago. Turns out a small rubber belt got old and stretched out and was failing to turn the small ejection pulley. A new belt is hard to find and is expensive. In desperation I took a rubber band from a bag of rubber bands I bought from the dollar store and used it as a replacement belt. Yesterday my other minidisc deck (MDS JE470) failed to eject. Once again because the ejection belt was old and stretched out. A rubber band fixed it. So instead of searching for a “official” belt just use a rubber band. What do you have to loose? It worked for me, twice. Quote Link to comment Share on other sites More sharing options...
trott3r Posted September 30, 2017 Report Share Posted September 30, 2017 thanks for the tip, Do you have a length and thickness for this rubber band. How did you fit it? Do you have to take the transport apart or is it easy to slip it on for a home user? Quote Link to comment Share on other sites More sharing options...
MDX-400 Posted October 2, 2017 Report Share Posted October 2, 2017 The problem with rubber bands is they'll eventually just snap. Hopefully yours will last as long as possible but rubber bands can "band aid" a belt fix in a pinch (like say you needed to eject a disc stuck inside) but they really aren't great for the long term. Typically speaking, most manufacturers use certain belt sizes/types for a wide array of applications, so it's possible you can find a belt on eBay, etc. that will work. Sometimes it's hard to track down what you're looking for as they just have belts for certain models--you basically have to find a cross-reference for that part# and then try searching more popular models for the belt. Anyway, given you seem to have had the one in the JB940 last a couple years, that's not bad at all! I'm actually quite surprised it's lasted that long but then again an MD's eject mechanism is pretty light duty given the small size of the discs. Quote Link to comment Share on other sites More sharing options...
freddyjollo Posted October 4, 2017 Report Share Posted October 4, 2017 On 02/10/2017 at 3:04 PM, MDX-400 said: The problem with rubber bands is they'll eventually just snap. Hopefully yours will last as long as possible but rubber bands can "band aid" a belt fix in a pinch (like say you needed to eject a disc stuck inside) but they really aren't great for the long term. Typically speaking, most manufacturers use certain belt sizes/types for a wide array of applications, so it's possible you can find a belt on eBay, etc. that will work. Sometimes it's hard to track down what you're looking for as they just have belts for certain models--you basically have to find a cross-reference for that part# and then try searching more popular models for the belt. Anyway, given you seem to have had the one in the JB940 last a couple years, that's not bad at all! I'm actually quite surprised it's lasted that long but then again an MD's eject mechanism is pretty light duty given the small size of the discs. well the real belts are really tiny and thin cant believe the real belts that good, just expensive Quote Link to comment Share on other sites More sharing options...
Revcarson Posted October 4, 2017 Report Share Posted October 4, 2017 I have a different problem relating to disc ejecting. The drive is in a Sony PCV-MXS10 computer, and when the minidisc is inserted it quickly ejects before the computer can read the drive. Perhaps is a driver or sonicstage issue? Or any is it a better chance the drive is just physically malfunctioning? The drive was hardly ever used since the computer was purchased. Is there anyone known to repair these things in 2017? Quote Link to comment Share on other sites More sharing options...
PhilippeC Posted October 6, 2017 Report Share Posted October 6, 2017 Your Sony PCV-MXS10 is a collector. Keep it preciously. Try to contact directly NGY here and also Jonathan (http://www.jonathandupre.fr/) alias jonathanpotato here to explain your problem, they have very good technical knowledge about MD units. Quote Link to comment Share on other sites More sharing options...
sfbp Posted October 6, 2017 Report Share Posted October 6, 2017 On 10/4/2017 at 2:11 PM, Revcarson said: I have a different problem relating to disc ejecting. The drive is in a Sony PCV-MXS10 computer, and when the minidisc is inserted it quickly ejects before the computer can read the drive. Perhaps is a driver or sonicstage issue? Or any is it a better chance the drive is just physically malfunctioning? The drive was hardly ever used since the computer was purchased. Is there anyone known to repair these things in 2017? Sounds mechanical to me... the sort of thing a drive would do if there was no registration of the disk/head via servo feedback. There are microswitches, too, and it sounds like something simply doesn't work right - it thinks there's no disk in there so it makes sure to put itself in the "ready to insert disk" state. Was the disk write protected perhaps? That might cause something in Windows to eject it. If so, try with a disk you don't care about. What you want to do is to take a look (if you can) with the lid of the disk unit open, so you can see whether the head is attempting to load and whether the spindle is spinning. You need both for the head to get data off the drive. Quote Link to comment Share on other sites More sharing options...
Bazzaman Posted November 30, 2017 Report Share Posted November 30, 2017 On 9/30/2017 at 7:45 PM, mdenter said: My minidisc deck MDS-JB940 quit ejecting discs a couple years ago. Turns out a small rubber belt got old and stretched out and was failing to turn the small ejection pulley. A new belt is hard to find and is expensive. In desperation I took a rubber band from a bag of rubber bands I bought from the dollar store and used it as a replacement belt. Yesterday my other minidisc deck (MDS JE470) failed to eject. Once again because the ejection belt was old and stretched out. A rubber band fixed it. So instead of searching for a “official” belt just use a rubber band. What do you have to loose? It worked for me, twice. I dusted off my je470 after the eject problem rendered it useless for over a decade and noticed the melted belt and put a pink loom band on it, it's working for now until I find a better one. Off topic but the main pcb has lots of missing components being a cut down version. So was wondering if anyone managed to mod it. An optical out? Headphone out, even a new output opamp stage. There's a optical out mod for the je440 so hoping these 2 models are similar. Quote Link to comment Share on other sites More sharing options...
Flan Posted May 6, 2019 Report Share Posted May 6, 2019 My Sony mindisc MDS-S38 has developed a problem on ejecting a disc. so that the disc is level with the slot / bezel on the unit. When pressing eject. Cannot grab with my fingers as normal. So Ejects to that point and sticks. Then the system overrides the eject issue and goes back in the unit. Still ejects after a couple of times trying. But My question is. Is that the symptoms of the start of the end of the ejection belt. Or is something more serious? Quote Link to comment Share on other sites More sharing options...
sfbp Posted May 6, 2019 Report Share Posted May 6, 2019 Belt needs to be replaced on most models which do this. I haven't looked at the service manual, so please forgive me if there's no belt in sight there. Quote Link to comment Share on other sites More sharing options...
Batt-man Posted May 27, 2019 Report Share Posted May 27, 2019 I went to an orthodontist and asked for some of the latex bands that are used for braces. I asked for some with a diameter of approx. 3/8 of an inch. They just gave me an entire small bag of about 100 of them. They were not all identical, so I looked for any that looked to be cut a little thicker (& therefore stronger I hoped). It's a little tricky to replace the belt, but there are videos on youtube showing exactly how to do it. I have 2 players that needed new bands, and those latex ones from the orthodontist worked perfectly! (And they were free!!) Quote Link to comment Share on other sites More sharing options...
kgallen Posted June 1, 2019 Report Share Posted June 1, 2019 For MDM-7 variant drives, I've been using the 17mm belts from eBay seller chn_03 (Charles Holt) in the UK. I've repaired 3 decks (MDS-JE440, MDS-JE480, MDS-E10) with these recently. (Charlie was very helpful and sold me a multi-pack of just the 17mm size). https://www.ebay.co.uk/itm/17mm-Rubber-Drive-Belt-for-Cassette-Deck-Player-CD-ROM-DVD-Player-etc/192420535089 It's about a 5 minute job to replace these: Unplug Remove lid (4 side screws, maybe 1 rear screw) Remove the drive from the deck 4 mount screws Two ribbon cables from the main PCB Maybe a chassis earth in some units to unclip from the main chassis Use tweezers to lift off the vertical tensioner spring on the left (drive opening facing you) - careful to not let it ping away!!! Ease apart the vertical slider at the rear, left gently and slide to the left the upper part of the disk load frame - and you're in for an easy belt change. Refit is the reverse, keeping the ribbon cables square as you gently reinsert into their sockets on the main PCB. 1 Quote Link to comment Share on other sites More sharing options...
trott3r Posted June 2, 2019 Report Share Posted June 2, 2019 (edited) kgallen: Thanks for the tip Any chance you could do a video or have found a video i could view? 4 decks and all have the eject problem Edited June 2, 2019 by trott3r missing Quote Link to comment Share on other sites More sharing options...
kgallen Posted June 2, 2019 Report Share Posted June 2, 2019 1 hour ago, trott3r said: Any chance you could do a video or have found a video i could view? See the video from this thread. The guy on the video is Russian, so you probably won't gain anything by listening (unless you understand Russian), but I watched the video which gave me this tip. Saved my bacon as I wasn't fancying key-hole surgery on a number of machines which is what all the other YouTube videos do! Note you DON'T need to disconnect the OWH cable as he does. Just the spring and the clip on the rear. The OWH will stay with the main chassis. Spring at 0:12 DON'T LOSE THE SPRING! Fine tweezers needed - I just lift out the top "hook" from the metal eye, but the spring probably will fall off the plastic peg at the bottom, so remove it and keep it safe. Rear clip at 1:04 Lift and slide top frame at 1:15 1 hour ago, trott3r said: 4 decks and all have the eject problem They won't in about 5 minutes when you've done the above!!! Good luck! Kevin Quote Link to comment Share on other sites More sharing options...
PhilippeC Posted June 3, 2019 Report Share Posted June 3, 2019 https://www.youtube.com/watch?v=IyfpqTASqeg in case you have condoms (french capotes)... Quote Link to comment Share on other sites More sharing options...
G1UCR Posted November 18, 2019 Report Share Posted November 18, 2019 Thank you to the contributors to this topic. They helped me repair my JE-440 with a plumber's O ring in a short time. Eject works very well now and the deck is back in use. Quote Link to comment Share on other sites More sharing options...
kgallen Posted November 18, 2019 Report Share Posted November 18, 2019 35 minutes ago, G1UCR said: They helped me repair my JE-440 with a plumber's O ring in a short time. Good work! Although I tended to find plumbing O-rings a little thick and stiff. I hope you found one that fits the pulleys nicely and is not straining the axle geometry at either end. The beltsI've looked at, even those that are still working well, are not under much tension and they are not particularly chunky belts. Kevin Quote Link to comment Share on other sites More sharing options...
G1UCR Posted November 18, 2019 Report Share Posted November 18, 2019 Hello. the first O ring I tried was too thick and that did not work. A thinner O ring did and although it is a little tighter on the pulleys I stretched it several times as I have noticed in the past that this what plumber's O rings do; consistent tension may not always be critical over the working life. It usually is when first fitting though. I will keep an eye on it. Quote Link to comment Share on other sites More sharing options...
LCQ428 Posted November 22, 2019 Report Share Posted November 22, 2019 This belt I have used after trying many and is the closest to the original. Not too tight as that makes the motor twist hard on its bearing and usually can’t spin like it should. I get them from this supplier .. https://www.turntableneedles.com/Square-Belt-Reel-23-Inch_p_213.html Quote Link to comment Share on other sites More sharing options...
PhilippeC Posted November 22, 2019 Report Share Posted November 22, 2019 Even one condom can be used ! Quote Link to comment Share on other sites More sharing options...
freddyjollo Posted January 15, 2020 Report Share Posted January 15, 2020 I have a number of JB940 decks one of which I have already had to replace the eject mechanism belt, that had been in storeage, but I got out to just give it a try. The one I have linked up to my hifi system hadnt been used for a few months & I always keep a disc in just in case I want to record some thing from the radio, off the fly. Today this happened and the disc wouldnt eject, I thought ah time to do this one so took off the lid and with power on and ejecting gave the disc a nudge. And it ejected and all seems good now, no need to replace the belt , well not just yet. So the thing to learn maybe is not to keep a disc in the deck? By the way the "belts" I bought are not the original expensive ones but a pack meant for tying hair as in pony tails, off ebay, they aint the best but about the right size and seem to work and are very cheap - I dont see any point in using the real thing as sooner or later you wont be able to get any so need to find an alternative source now, as the hardware I think can last decades? Quote Link to comment Share on other sites More sharing options...
PhilippeC Posted January 16, 2020 Report Share Posted January 16, 2020 Try the condom ring like in the video.... Quote Link to comment Share on other sites More sharing options...
Perus Posted March 13, 2020 Report Share Posted March 13, 2020 When my JE470 arrived recently I needed a quick replacement for the loading belt and found myself a bag of 600(!) small rubber bands in a suitable size at a hobby store which did the trick for me at least. This is what I got for £5 (from another store and not Walmart): https://www.walmart.com/ip/Rainbow-Loom-Black-Rubber-Bands-Refill-Pack-RL13-600-ct/47924563 Before anyone laugh, now I can replace this 599 times more at no extra cost. Instead of buying a "genuine" belt from the bay at £5 each /Per Quote Link to comment Share on other sites More sharing options...
BearBoy Posted March 13, 2020 Report Share Posted March 13, 2020 My daughters have got thousands of those things in every colour imaginable. Never occurred to me they could be used to fix a deck. I ordered another £5 special (well, £3.50) from eBay last night for my MDS-JB940. Quote Link to comment Share on other sites More sharing options...
rm22903 Posted March 10, 2021 Report Share Posted March 10, 2021 Does anyone have the dimensions for the eject drive belt? Quote Link to comment Share on other sites More sharing options...
kgallen Posted March 10, 2021 Report Share Posted March 10, 2021 2 hours ago, rm22903 said: Does anyone have the dimensions for the eject drive belt? 17mm diameter, 0.8mm square section, Sony part 4-227-025-01. We had quite a long chat about them here. Skip to later on, but I've given you a link from the top of the thread: Quote Link to comment Share on other sites More sharing options...
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