Yea, same here. You're my hero. Going beyond the call of duty and making it look easy. Makes me want to go back to my players that i stopped working on cause a bit off more than i could chew.
The 2 arc shaped slots in the back plastic are for inserting a tool (I use a U shaped wire) to move the brushes out of the way when inserting the rotor. You risk crushing them if not careful.
I find it very awesome that you never seem to lose screws and always know where to put them in reassembling. I need to use a container otherwise they are gone.
When I could go to the local shop and buy one for 5.00 sure but they are all closed up. Now stuff has to be ordered and when idiots at the online shops don't listen to shipping requests to ship by post and they ship fed ex because they get a discount and then fed ex adds 37.50 in broker charges to a 5.00 motor it is not economical to do it. This was an easy enough fix. 9 out of 10 motors center be fixed like this.
@@12voltvids Andrews Electronics here in U.S. is very helpful in finding parts. They pretty much have diagrams for everything and so when you call just give the model no. and describe the part needed, motor etc. Also they have a research dept that will search for parts & call you back later.
Thank you! I’ve been archiving (digitizing) a box of cassettes. This seems to be the most useful information I’ve found to help me solve the issue(s) with my Sony tape deck. Now I’m going to check out your other videos to find out why one tape deck won’t play in reverse after I changed the belts.
Got the KX W202 version of that dual deck and i rebuilt the motors, the brass bearings wore out and the armatures were flapping about in there, replaced the brass bearings and the unit works great, it has lots of hours
Lucky me so far have not had to take any motors apart yet. Just finished a Nak CR-3A and had to soak the cam switches over night in Deoxit to get good continuity. Keep up the good work, love your channel. I did score a Sony WA7ESA on ebay for 19 bucks and all it needed was new belts and pinch rollers. I did work on a DJ mixer from Canada many years ago and the gal really loved it and paid $100.00 US dollars for two switches it was made in Europe and the only parts distributor was in Quebec Canada, Duty charges are ridiculous.
Not duty. Broker charges. Totally different thing. Private companies like fed ex have their own charges to fill out the paperwork. By post I have never paid s penny except when someone does the foolish thing like declaring a broken piece being sent for repair with some outrageous value. A Walkman is not worth 1000 but for the guy that thought it was, well he paid 175 in taxes to get it to me. It was a broken Walkman, it has a value of $0.00
Thanks 12V!!! I didn't need to go this step, I was able to manually get the motor going and after letting it play for a while it now just spins free again! I added a dot of oil to the shaft once free, should work its way into the mating surface.
Thus far I have not lubed from the back. I am only in my thirties, so the tape players I had as a kid were low quality, so my point of reference is small. But I would imagine an dual deck, hi-speed dubbing Onkyo, made in Japan in 1988/89 would be pretty quiet... I could clearly still hear the motor with the case open; its reasonable with it all assembled. Should I expect it to be very very quiet? I don't know what a reasonable amount of noise from the capstan motor is to know if its required to lube or not. I need some sort of plastic pry tool, the metal cap was directly on the circuit board and the noise was not worth the damage...@@12voltvids
Well Done! Yesterday I repaired a Pioneer CT335 tape recorder with the same mechanism of Alps. The problem was the pin that stuck in the electromagnet.
Really helpful video. Had to disassemble a Matsushita motor in a denon cassette deck and you really helped me. Had to adjust the speed a bit after, but now all running well. Thank-you very much!
Great job! I completely follow your ideas about components replacement, even if shipping fees are somewhat lower in EU, parts for a 20 years deck are difficult to locate or quite expensive, even in top renowned brands. Most parts like motors or transformers have to be sourced in China with high transport (that's heavy stuff) and toll fees, and can easily be lost when not needing 1 month delivery time. You can sometimes resolve the trouble finding a similar machine on eBay for exchange parts, or buy a high end industrial equivalent, but this solution can also become a pain in the "budget". So when I encounter this kind of motor, I prefer your solution, a few minutes well spent. Some motors have the reputation of being much more tricky to disassemble, those with fragile nylon couplings or complex clutches, but that's finally always the same problem: find the assembling solution and reverse it, or find an alternate one, even partial, that gives you access to the failed or seized part. I've also saved a few transformers with failed thermal fuses or bad solders, and needs high voltage insulation tests... Plus, most transformers have specific or multiple output voltages, a nightmare if you need a supplementary medium voltage for fluorescent displays, or separate outputs for AD converters. I hope your new solution with audio rights will work best against these illegitimate claims! Even if you sing a Gregorian anthem in latin , there's always an escrow pretending he did it?
Thanks for the fantastic tutorial! I've got a deck with the same, apparent problem on both decks. They both click when you had play and FF/RW, but nothing happens. The deck is nearly unused, but it sat 30 years in it's original box. I'll try lubrication of the capstan motors first! Great tip about the solder points coming apart, as well!
That was really interesting to watch. Thanks! I really learned a lot. I was trying to record old cassettes with an old Sony Boom box given to me by a friend. It played one song, then kind of speed up the playback speed. I stopped the cassette and ejected it to see if the tape had been pulled, but that wasn't the case. Put the cassette back in and hit the play button, nothing works. No FF, No Rew, no Play. So I've been Googling what the problem could be and came to your channel. I'm not trained in electronics, but I do like taking things apart. So I'll try and see why the capstan is not rotating. The playhead engages, but I don't know why nothing is turning. The belt is still in place. I don't know if it is slack. Or maybe it just needs so cleaning.
@@HBAVHS I'm doing great. had a crapy summer as I was attacked by some nasty hornets, and found out the hard way that I am allergic to them, and found my self in the hospital hooked up to all kinds of monitors. Then what do I do almost as soon as I recover, get stung by another one of those little bastards.
I fix a lot of fans as well, using a drop of oil into the sleeve bearing to get them lubricated again, and they ran for many more years. Also used to repair small fans, where you had to replace the 2 tiny bearings the fan ran on, and then assemble it again. Had to fix, as they were no longer made, and as source of the bearings we had a large collection of assorted synchro assemblies, from scrapped aircraft. Lots of gears for the current aircraft repairs, and all I needed was failed syncro units for the bearings, and the odd working one to grab new coil assemblies from to fix failed windings, so we were really frugal with the pile of scrap.
Smashing repair, well worth the time to recover that motor. I looked around for a motor for my mates 1977 tensai tape deck, but there was a lot of crap out there at daft prices, so gave the commutators/brushes a clean and it was good enough. I always found the old self regulating motors with the flying out weights/contacts very novel. Must have been a very expensive motor to manufactuer.
I just repaired a Fostex X77 Cassette multitracker with a worn out motor bearing. It's no wonder the motors wear out on these things because it is a one motor deck. FFW, RWD, Play all handled by same motor. Finding the correct Dual speed,CW motor was a nightmare. Eventually got one shipped from seller in Australia!
What about the decks that have a constant running motor, i always thought that was a fast way to wear it out. Also the single motor that runs for two decks, madness.
hi i have seen the motor what's in this on ebay £2.50 each 2400 RPM they do go up to 4000 rpm 2 speed one £10 there is a need for the low cost motors in the deck very good for the money i tell you what way CW CCW motors and 2 speed thanks for putting up the video your mate is like you man doe's not like to pay for my time
Great video, smooth talking. I guess these simple decks have no issues with torque, i mean i have an expensive deck that has issues getting to the end of the tape. Wowow & flutter increases minute by minute, Just because it needs the torque spindle to be slightly slowed (Like a VCR) to keep tape at the right stress. Without it it eats tape as you well know. The power on the motor is sufficient for FF up to 98% of the tape. at the end it just struggles and struggles. The same motor RWD's perfectly. It's just that simple Y gear that turns left or right with RWD and FF. The left spindle has a tension regulation as i mentioned the right has none. So why have these simple decks no issues with this? It is a pioneer CT-339. It is a bit of a mystery, bought it for 9 euro's because it was malfunctioning. It turned out that these decks have a tiny plastic part that pushes all so slightly against the back of the left Spindle Gear. It was missing, that said it recorded fine but only on well cased cassettes from TDK or Maxell. These had strong tape regulation inside the cassette and the deck had no issues with those. Only wow-wow and flutter would increase slightly but noticeable at the end of the tape. I replaced belt, didn't work. Than i looked up the service-manual and it show no sign of a tension regulation in exploded view. I dismantled the mechanism so i could see inside at the back of the spindles and yes there was that tiny bracket that would house a tension regulator. Probably a ball inside a tube rolling against the back of the left spindle gear with a spring. I fabricated a simple plastic replacement and the deck records fine now with all tapes but with all the problems i already mentioned earlier. My guess is these decks are delivered from factory without this tension regulation part and hope for the best. Think about that, from Pioneer?
I had the same problem with a brand-new 2020 Marantz double deck I had bought! The Capstan's looked like something out of a gumball machine! What a joke! I had to bring it to the electronic recyclers two weeks later! The best decks are from 1988-1996.
You're right about Yamaha decks Dave. I have a KX-580 and the sound is superb but the build quality is not very good. Also annoying is the RCA jacks are all black which makes connecting it up a right pain.
You need a calibrated pre-recorded test tape and line output hook into a scope and all you have to do is hit play and then adjust capstan motor to match the correct frequency that was pre recorded on the tape pretty much. You can use BNC to RCA adapter for your scope. You can find the test tape all over eBay, or if you have a deck you trust that been recently overhaul and calibrated, you can use that to make your own test tape.
I have a calibrated technics direct drive deck that I use to make 440hz 1khz and 3khz test tapes. I usually use 440 for speed as a cheap guitar tuner can be used as 440 is the A string.
Great breakdown, nice work. I have a Tascam 244 4-track that I purchased not too long ago from the original owner who used it quite a bit since buying it in the 80’s. He was also a heavy smoker. I managed to clean a lot of the tobacco stains out of the machine, but the motor would have sporadic speed changes when I tried to record or play. Would that be a similar issue to this machine you worked on? My guess is maybe some of that tobacco stain/tar got onto the spindle and is slowing it, but it might be FUBAR, as you say. Any thoughts?
Nice video, very detailed. A question though, i got some grease bearing oil in a standard Tascam repair kit, can i use this as lube/oil for the capstan motor? Anyway, i had to order a new motor anyway as the pcb and foam material were so dried out it basically crumbled when i tried to open it.
Very helpful. One of my boomboxes has wow and flutter issue and the motor was noisy. I rebuilt the motor and reblubricated it. Works fine but now I can hear a little bit of wobbling while playing back? Any idea?
Always fun to see the exact model you have at home... I actually have two of those. Any comments on this particular model? Are they any good or worth trying to save for posterity?
YEA Dave, you are the difference between a "parts replacement" dweeb and a real repairman. I have a couple of acquaintances ( aka non-paying friends ) who give me their "unwanted junk" . Sometimes it is stuff I can actually use myself. If you skin a SNAKE, it will piss off less sensitive folks. Sunday's winner category ! Thanks J K
What would be your tape deck of choice, I've been looking at some vtg decks on ebay and some sellers want crazy money for them, I was looking at NAKAMICHIs but way too much.
The worse cassette deck i attempted to repair was a fisher studio standard double. Those things are horrible. Each deck side had like 20 tiny metal screws that hold the sandwich together and u have to take that apart to change belts. I tossed it in the trash. I have a very nice Kenwood auto reverse deck that has a very noisy motor. Plays okay but bearings are noisy. That one needs to be done this way too and I have put it off. Will take patience.
I really enjoyed the video and just Subscribed. A couple of newbie questions..as I am reading a lot of conflicting info. What did you use to clean the capstan (isopropyl alcohol 99% ?), and even more curiously, what kind of oil did you use / should I purchase to lubricate the capstan motor? (I went through the comments and did not see this asked...and unfortunately I could not tell from the video).
Isopropanol 99% to clean the capstan and pinch roller. The oil i use is 3 in 1 electric motor oil. This is virgin 20wt oil. Not the same as engine oil as that has detergent in it and corrosion inhibitors. Electric motor oil is pure oil nothing added.
@@12voltvids Thanks for replying so quickly and for being so specific. It's really helpful! I'll ask one further question that I was curious about from watching, but held off on asking. I think you mentioned that you used 3 volts to test the motor. May I ask what you used to safely push power to the little motor? EDIT: I think I answered my own question by watching another beginner's guide on using a multimeter where the instructor mentioned using a "variable power supply" :)
Got a question: you mentioned about the test tone tape, I have a hard time finding them online but if you’re making them, how much do you charge for a cassette tape with the test tone recorded? Thank you for mentioning it and I learned a lot from you.
I bought mine at duplication.ca... www.duplication.ca/audio-cassette-speed-calibration-test-tape.html P.S. you can use an app on your phone to measure the frequency if you don't have any specialized equipment
Hey I have a eg-500ad-2b motor just like in this unit that is pretty loud, should I take it apart and check and lube bearings or just get a new unit if so where do I get a good replacement?
hello, i have a pmd221 that is making a really loud screeching noise when i play, rewind, fast forward in standard speed, but doesn't happen in low speed. the audio out isn't effected, it's just coming from the player itself. any ideas?
Saw your work repairing that motor. Very nice. I have an Aiwa unit with 4 terminals on the motor. Trying to find out why it won't run the machine. 2 terminals will run the motor the other 2 don't Is that right? Why 4 terminals? Thanks!
I'm troubleshooting a 12vdc capstan motor from a midistudio 644. The bearing turns smoothly and effortlessly. When I put 12v on the terminals there's no movement. It has 4 terminals, the cap has + and - stamped above the respective terminals. (EG-530KD-2B - 1600/ 3200 RPM) Do you think one of the other 2 terminals act as a trigger ? Cause I'm putting 12vdc and nothing's happening.
The speed adjust is just a voltage regulator. These are cheap motors. Even high end decks used them. My high end technics on the other hand has a direct drive quartz lock servo motor like a VCR used. Much more accurate.
Got a Sony 12v capstan motor thats not spinning, seems dead, want to try this to see I can fix it before I buy a replica, how to get the pulley off without heat as it looks like its plastic
Those mabuchi motors werent known to be too reliable i got a turntable that uses that same motor, rumbles like crazy even after an overhaul and lubrication
Temporary fix for those bushes is to use a nail to gently tap a few dimples into the end faces, so that the material closes up the bush hole slightly, or just tap the faces to flatten them slightly, closing up the clearance causing the rumble. Otherwise find same size bushing and replace it, just has to be same shaft diameter and bush outer diameter. I have had some success turning the bush upside down, so the wear is on the other side that the old place the side tension was, or building up the gap with a sliver of solder.
disassembling and assembling back with minimal side effect to the subject and other parts is the goal and perform by one who is a professional (knowledgeable or expert)..that is as to a doctor operating on a patient.
Same problem with many other decks, Aiwa, Sony, Nakamichi because the thing sits unused for years. I need the same 12V CCV 530 Mabuchi motor, but the original Japanese ones are not that easy to get. Did the same thing as you did but the W&F is very high and speed fluctuates. I only scream when I stub myself. You know there's a tool called hammer. F... brushes😤😬
hi that's what i said to the tascam john his prices are far to high yes cover cost's as to make money in the long term o have said there's only so many decks out there needing work on them like you i keep all costs down i look for unit's i don't have i have watched alot of your video 's one's in your past as well
My car doesn't need a tune up. It's brand new. Electric cars don't need much maintenance. My other one is almost 9 years old and the only maintenance that has had to be done to date is new tires. 160,000KM (100,000 miles) on the original brakes and still 80% wear left! Besides costing very little to run, there is the maintenance or non maintenance that has to be factored in.
Having owned this since bought new KX300U, enjoyed watching you tear apart that elec. motor but gravity and a quality refined lubricant will accomplish the same result as I have done both motors on mine. I disagree with your analysis that this is all plastic, the entire chassis is metal, it's not a SANYO. You should done both motors, just a matter of time before other starts going bad.
Hej, i have an amp of which the transformer starts to hum very loud after running for a while. It wont go away with disconnected secondary so the problem lays in the transformer itself. Any ideas how to silence it?
If it gets very hot running disconnected you have an internal short, which is fatal. if it just hums and runs cool, then you can try to apply a coat or three of polyurethane varnish, preferably by heating the transformer to 100C in an oven set to cool (not hotter, as it will melt) and then dipping into the varnish till cool, and pulling out and leaving to dry for 2 days or so. The hot transformer will expand, and on cooling will pull the varnish into cavities, hopefully curing the hum. Works best with vacuum application of the varnish, but needs a vacuum pot and pump to pull air out under the varnish and then allow ambient air pressure on opening to push varnish into all the cavities. In any case the varnish needs to be fully covering the transformer.
@@SeanBZA Was going to say the same thing. If it is humming when it is warm most likely one of the ferrous plates in the core is loose. Needs to be glued down again. On flyback transformers it was pretty common that the core wasn't sealed, and we would just use a varnish spray can and soak it completely and let it dry. 9 times out of 10 that stopped the squeal.
It's so easy to damage the brushes on disassembly - not damaged here in this video, if someone is reading my comment BTW. ;o) Recently, I had a suspect 1979, 12v dc motor, for my Sansui SC-1330 cassette deck. Rather than open it up to see if the brushes/cummutator connection was 'dirty', I decided to squirt Servisol into the motor through a hole towards the brush/commutator section. Since then, then motor has been steady as a rock as far as speed stability is concerned. Not sure if Servisol is sold in the US or Canada? However, an old motor for my Aiwa AD-F770 did need replacing despite efforts to 'save' it. The replacement was a genuine Mabuchi CCW 2400rpm motor. See cassettedeckman.blogspot.com/2020/04/aiwa-ad-f770-capstan-motor-voltage.html
I have a similar issue but for me the tapes play too fast. I have tried the speed adjustment, does nothing, tried cleaning capstan and heads, no change. I have to also manually start the motor. I will now replace the motor and that should fix. Let me know your thoughts or anyone in chat.
Actually, I'm glad you tore the motor down. It was neat to see how it was built
Yea, same here. You're my hero. Going beyond the call of duty and making it look easy. Makes me want to go back to my players that i stopped working on cause a bit off more than i could chew.
The 2 arc shaped slots in the back plastic are for inserting a tool (I use a U shaped wire) to move the brushes out of the way when inserting the rotor. You risk crushing them if not careful.
I was about to say that 👍👍
I find it very awesome that you never seem to lose screws and always know where to put them in reassembling. I need to use a container otherwise they are gone.
I had the same thought as you! LOL! I bought a nice, six-compartment clear container with snapping lid for all my breakdowns.
You took this to the nth level of patience and saved time( waiting for parts) and bucks too!
It really didn't take that long. What you saw was almost real time. There wasn't much cut.
I would have thought it would be much cheaper to get a new motor than have Dave overhaul the old one. Very enjoyable video.
When I could go to the local shop and buy one for 5.00 sure but they are all closed up. Now stuff has to be ordered and when idiots at the online shops don't listen to shipping requests to ship by post and they ship fed ex because they get a discount and then fed ex adds 37.50 in broker charges to a 5.00 motor it is not economical to do it. This was an easy enough fix. 9 out of 10 motors center be fixed like this.
@@12voltvids Andrews Electronics here in U.S. is very helpful in finding parts. They pretty much have diagrams for everything and so when you call just give the model no. and describe the part needed, motor etc. Also they have a research dept that will search for parts & call you back later.
Thank you! I’ve been archiving (digitizing) a box of cassettes. This seems to be the most useful information I’ve found to help me solve the issue(s) with my Sony tape deck. Now I’m going to check out your other videos to find out why one tape deck won’t play in reverse after I changed the belts.
I like you determination to fix the motor, and not simplly "buy another". You have an inquisitive mind, and for that I respect!
Lovely to see an expert doing a great job - A bunch of fun to watch - Thanks
Got the KX W202 version of that dual deck and i rebuilt the motors, the brass bearings wore out and the armatures were flapping about in there, replaced the brass bearings and the unit works great, it has lots of hours
Yup that is always a possibility. This one just seized up because it sat so long without use.
Lucky me so far have not had to take any motors apart yet. Just finished a Nak CR-3A and had to soak the cam switches over night in Deoxit to get good continuity. Keep up the good work, love your channel. I did score a Sony WA7ESA on ebay for 19 bucks and all it needed was new belts and pinch rollers. I did work on a DJ mixer from Canada many years ago and the gal really loved it and paid $100.00 US dollars for two switches it was made in Europe and the only parts distributor was in Quebec Canada, Duty charges are ridiculous.
Not duty. Broker charges. Totally different thing. Private companies like fed ex have their own charges to fill out the paperwork. By post I have never paid s penny except when someone does the foolish thing like declaring a broken piece being sent for repair with some outrageous value. A Walkman is not worth 1000 but for the guy that thought it was, well he paid 175 in taxes to get it to me. It was a broken Walkman, it has a value of $0.00
Another cracking video. These inspired me to undertake my own repairs. I’m now on my 12th deck.
You are the king of the kings with this (repairing decks). Congratulations from Brazil.
Thanks 12V!!!
I didn't need to go this step, I was able to manually get the motor going and after letting it play for a while it now just spins free again!
I added a dot of oil to the shaft once free, should work its way into the mating surface.
How are you going to get the back bearing that way?
Thus far I have not lubed from the back. I am only in my thirties, so the tape players I had as a kid were low quality, so my point of reference is small. But I would imagine an dual deck, hi-speed dubbing Onkyo, made in Japan in 1988/89 would be pretty quiet... I could clearly still hear the motor with the case open; its reasonable with it all assembled.
Should I expect it to be very very quiet? I don't know what a reasonable amount of noise from the capstan motor is to know if its required to lube or not.
I need some sort of plastic pry tool, the metal cap was directly on the circuit board and the noise was not worth the damage...@@12voltvids
Well Done! Yesterday I repaired a Pioneer CT335 tape recorder with the same mechanism of Alps. The problem was the pin that stuck in the electromagnet.
Invaluable tuition for owners of ageing Yamaha tape decks... like me! Thanks a lot👍
Really helpful video. Had to disassemble a Matsushita motor in a denon cassette deck and you really helped me. Had to adjust the speed a bit after, but now all running well. Thank-you very much!
"we don't do things easy" Wow! Your the pro not me. You Make it look easy. Now I wanna try.
Great job!
I completely follow your ideas about components replacement, even if shipping fees are somewhat lower in EU, parts for a 20 years deck are difficult to locate or quite expensive, even in top renowned brands. Most parts like motors or transformers have to be sourced in China with high transport (that's heavy stuff) and toll fees, and can easily be lost when not needing 1 month delivery time. You can sometimes resolve the trouble finding a similar machine on eBay for exchange parts, or buy a high end industrial equivalent, but this solution can also become a pain in the "budget". So when I encounter this kind of motor, I prefer your solution, a few minutes well spent. Some motors have the reputation of being much more tricky to disassemble, those with fragile nylon couplings or complex clutches, but that's finally always the same problem: find the assembling solution and reverse it, or find an alternate one, even partial, that gives you access to the failed or seized part.
I've also saved a few transformers with failed thermal fuses or bad solders, and needs high voltage insulation tests... Plus, most transformers have specific or multiple output voltages, a nightmare if you need a supplementary medium voltage for fluorescent displays, or separate outputs for AD converters.
I hope your new solution with audio rights will work best against these illegitimate claims! Even if you sing a Gregorian anthem in latin , there's always an escrow pretending he did it?
Thanks for the fantastic tutorial! I've got a deck with the same, apparent problem on both decks. They both click when you had play and FF/RW, but nothing happens. The deck is nearly unused, but it sat 30 years in it's original box. I'll try lubrication of the capstan motors first! Great tip about the solder points coming apart, as well!
Great repair on that motor nicely made cassette deck
That was really interesting to watch. Thanks! I really learned a lot. I was trying to record old cassettes with an old Sony Boom box given to me by a friend. It played one song, then kind of speed up the playback speed. I stopped the cassette and ejected it to see if the tape had been pulled, but that wasn't the case. Put the cassette back in and hit the play button, nothing works. No FF, No Rew, no Play. So I've been Googling what the problem could be and came to your channel. I'm not trained in electronics, but I do like taking things apart. So I'll try and see why the capstan is not rotating. The playhead engages, but I don't know why nothing is turning. The belt is still in place. I don't know if it is slack. Or maybe it just needs so cleaning.
Great job =D I've done the same thing myself! Sometimes its hard to source a motor of the correct dimensions, voltage, RPM etc.
Absolutely. By the way, hope your doing fine.
Of you buy one off ebay and it is a pull from an old unit.
Thanks, I take my bow now :)
@@HBAVHS I'm doing great. had a crapy summer as I was attacked by some nasty hornets, and found out the hard way that I am allergic to them, and found my self in the hospital hooked up to all kinds of monitors. Then what do I do almost as soon as I recover, get stung by another one of those little bastards.
Great explanation I just did the exact same thing to a Pioneer CT-F500 and its working like new.
I fix a lot of fans as well, using a drop of oil into the sleeve bearing to get them lubricated again, and they ran for many more years. Also used to repair small fans, where you had to replace the 2 tiny bearings the fan ran on, and then assemble it again. Had to fix, as they were no longer made, and as source of the bearings we had a large collection of assorted synchro assemblies, from scrapped aircraft. Lots of gears for the current aircraft repairs, and all I needed was failed syncro units for the bearings, and the odd working one to grab new coil assemblies from to fix failed windings, so we were really frugal with the pile of scrap.
That was like watching me !
Including the "Slotted dermal incision" lol
You Sir are truly one of a kind. Thank-You very much.
Your have a great talent my friend, thank you for sharing this.
great vid! I was looking several days on that topic and you ve explained & showed every important step!! thnx from Germany
Smashing repair, well worth the time to recover that motor.
I looked around for a motor for my mates 1977 tensai tape deck, but there was a lot of crap out there at daft prices, so gave the commutators/brushes a clean and it was good enough.
I always found the old self regulating motors with the flying out weights/contacts very novel.
Must have been a very expensive motor to manufactuer.
I just repaired a Fostex X77 Cassette multitracker with a worn out motor bearing. It's no wonder the motors wear out on these things because it is a one motor deck. FFW, RWD, Play all handled by same motor. Finding the correct Dual speed,CW motor was a nightmare. Eventually got one shipped from seller in Australia!
What about the decks that have a constant running motor, i always thought that was a fast way to wear it out.
Also the single motor that runs for two decks, madness.
Those motors with the speed governors were used in many old 8 track players. Speaking of that, just got another one of those in.
just want to say that was a good job, thanks for sharing.
Good morning from Oklahoma. That was a good fix and saving money ois always a good idea.
Always a good feeling when something old and broken comes back from the dead.
Very informative, thanks for the deep dive.
Thanks for the video , I might have to have a look at a motor , in the future.
you make it like its easy!...i owned same exact that vintage yamaha 300kxu, sound great, from a thrift shop.
hi i have seen the motor what's in this on ebay £2.50 each 2400 RPM they do go up to 4000 rpm 2 speed one £10
there is a need for the low cost motors in the deck very good for the money i tell you what way CW CCW motors and 2 speed
thanks for putting up the video your mate is like you man doe's not like to pay for my time
Great video, smooth talking. I guess these simple decks have no issues with torque, i mean i have an expensive deck that has issues getting to the end of the tape. Wowow & flutter increases minute by minute, Just because it needs the torque spindle to be slightly slowed (Like a VCR) to keep tape at the right stress. Without it it eats tape as you well know. The power on the motor is sufficient for FF up to 98% of the tape. at the end it just struggles and struggles. The same motor RWD's perfectly. It's just that simple Y gear that turns left or right with RWD and FF. The left spindle has a tension regulation as i mentioned the right has none. So why have these simple decks no issues with this? It is a pioneer CT-339. It is a bit of a mystery, bought it for 9 euro's because it was malfunctioning. It turned out that these decks have a tiny plastic part that pushes all so slightly against the back of the left Spindle Gear. It was missing, that said it recorded fine but only on well cased cassettes from TDK or Maxell. These had strong tape regulation inside the cassette and the deck had no issues with those. Only wow-wow and flutter would increase slightly but noticeable at the end of the tape. I replaced belt, didn't work. Than i looked up the service-manual and it show no sign of a tension regulation in exploded view. I dismantled the mechanism so i could see inside at the back of the spindles and yes there was that tiny bracket that would house a tension regulator. Probably a ball inside a tube rolling against the back of the left spindle gear with a spring. I fabricated a simple plastic replacement and the deck records fine now with all tapes but with all the problems i already mentioned earlier. My guess is these decks are delivered from factory without this tension regulation part and hope for the best. Think about that, from Pioneer?
I had the same problem with a brand-new 2020 Marantz double deck I had bought! The Capstan's looked like something out of a gumball machine! What a joke! I had to bring it to the electronic recyclers two weeks later! The best decks are from 1988-1996.
Worth trying thats for sure, since the decks not worth much more than $50. Great video.
I have done this probably over 100 times. Some times the bearings are worn out, but in many cases like this the iol has gelled.
nice! Thanks.
i hope, this is also working like this at my kx800
You're right about Yamaha decks Dave. I have a KX-580 and the sound is superb but the build quality is not very good. Also annoying is the RCA jacks are all black which makes connecting it up a right pain.
Although probably not meant to be funny, this vid had me in stitches. I'm surprised a brushed motor lasted so long with the brushes not wearing out.
I would say that was a very good repair, Could you show how you checked for calabration of the speed..
You need a calibrated pre-recorded test tape and line output hook into a scope and all you have to do is hit play and then adjust capstan motor to match the correct frequency that was pre recorded on the tape pretty much. You can use BNC to RCA adapter for your scope. You can find the test tape all over eBay, or if you have a deck you trust that been recently overhaul and calibrated, you can use that to make your own test tape.
I have a calibrated technics direct drive deck that I use to make 440hz 1khz and 3khz test tapes. I usually use 440 for speed as a cheap guitar tuner can be used as 440 is the A string.
@@thetechgenie7374 Thanks.
@@12voltvids Thanks.
Great breakdown, nice work. I have a Tascam 244 4-track that I purchased not too long ago from the original owner who used it quite a bit since buying it in the 80’s. He was also a heavy smoker. I managed to clean a lot of the tobacco stains out of the machine, but the motor would have sporadic speed changes when I tried to record or play. Would that be a similar issue to this machine you worked on? My guess is maybe some of that tobacco stain/tar got onto the spindle and is slowing it, but it might be FUBAR, as you say. Any thoughts?
Nice video, very detailed. A question though, i got some grease bearing oil in a standard Tascam repair kit, can i use this as lube/oil for the capstan motor? Anyway, i had to order a new motor anyway as the pcb and foam material were so dried out it basically crumbled when i tried to open it.
Very helpful. One of my boomboxes has wow and flutter issue and the motor was noisy. I rebuilt the motor and reblubricated it. Works fine but now I can hear a little bit of wobbling while playing back? Any idea?
Well done sir.
Always fun to see the exact model you have at home... I actually have two of those. Any comments on this particular model? Are they any good or worth trying to save for posterity?
They are fairly good and reliable.
Great video! Can a plastic pulley also be removed from a shaft by heating?
i try this with the Marantz SD225 TAPE DECK motor the barring was black but i oil it now it runs cooler then it did i fixed the speed slows
Nice video...any tips for an AR synchronous motor?
YEA Dave, you are the difference between a "parts replacement" dweeb and a real repairman. I have a couple of acquaintances ( aka non-paying friends ) who give me their "unwanted junk" . Sometimes it is stuff I can actually use myself. If you skin a SNAKE, it will piss off less sensitive folks. Sunday's winner category ! Thanks J K
Very good job.❤️
28mns very interesting and helpful video. 👍
What would be your tape deck of choice, I've been looking at some vtg decks on ebay and some sellers want crazy money for them, I was looking at NAKAMICHIs but way too much.
The worse cassette deck i attempted to repair was a fisher studio standard double. Those things are horrible. Each deck side had like 20 tiny metal screws that hold the sandwich together and u have to take that apart to change belts. I tossed it in the trash. I have a very nice Kenwood auto reverse deck that has a very noisy motor. Plays okay but bearings are noisy. That one needs to be done this way too and I have put it off. Will take patience.
I really enjoyed the video and just Subscribed. A couple of newbie questions..as I am reading a lot of conflicting info. What did you use to clean the capstan (isopropyl alcohol 99% ?), and even more curiously, what kind of oil did you use / should I purchase to lubricate the capstan motor? (I went through the comments and did not see this asked...and unfortunately I could not tell from the video).
Isopropanol 99% to clean the capstan and pinch roller. The oil i use is 3 in 1 electric motor oil. This is virgin 20wt oil. Not the same as engine oil as that has detergent in it and corrosion inhibitors. Electric motor oil is pure oil nothing added.
@@12voltvids Thanks for replying so quickly and for being so specific. It's really helpful!
I'll ask one further question that I was curious about from watching, but held off on asking. I think you mentioned that you used 3 volts to test the motor. May I ask what you used to safely push power to the little motor?
EDIT: I think I answered my own question by watching another beginner's guide on using a multimeter where the instructor mentioned using a "variable power supply" :)
I love this film!
Great job.
The KX-300U is not the best built deck out there, but it has a huge following in the tape community due to it's excellent sound quality.
Got a question: you mentioned about the test tone tape, I have a hard time finding them online but if you’re making them, how much do you charge for a cassette tape with the test tone recorded? Thank you for mentioning it and I learned a lot from you.
I bought mine at duplication.ca...
www.duplication.ca/audio-cassette-speed-calibration-test-tape.html
P.S. you can use an app on your phone to measure the frequency if you don't have any specialized equipment
nice work :)
That is the last of the bad ol days of cassette decks in the 90s when they all went plastic.
Hey I have a eg-500ad-2b motor just like in this unit that is pretty loud, should I take it apart and check and lube bearings or just get a new unit if so where do I get a good replacement?
Are these brass oil infused bearings? Some motors have them. I watched how to re-infuse them with SAE 20W oil.
Very interesting video as well.
Great job just subscribed 👍
yes another great repair
is this similar for many other capstan motors? I have a JVC walkman I'm working on and the motor doesn't sound too good, very bad wow and flutter also
great! complicated work
hello, i have a pmd221 that is making a really loud screeching noise when i play, rewind, fast forward in standard speed, but doesn't happen in low speed. the audio out isn't effected, it's just coming from the player itself. any ideas?
hello, where to adjust the speed of this yamaha model, from the motor or from the circuit?, great demonstration of how to do a real restoration.
I know I’m a bit late but how would you repair the center motor. I have a similar cassette mechanism with dreadful w&f.
Saw your work repairing that motor. Very nice. I have an Aiwa unit with 4 terminals on the motor. Trying to find out why it won't run the machine. 2 terminals will run the motor the other 2 don't Is that right? Why 4 terminals? Thanks!
I'm troubleshooting a 12vdc capstan motor from a midistudio 644. The bearing turns smoothly and effortlessly. When I put 12v on the terminals there's no movement. It has 4 terminals, the cap has + and - stamped above the respective terminals. (EG-530KD-2B - 1600/ 3200 RPM)
Do you think one of the other 2 terminals act as a trigger ? Cause I'm putting 12vdc and nothing's happening.
21:27...Mr. Jinx: [grimaces] "What an expression!"
And to top it off my Siamese cat is miss jinxy! Actually she is my daughter's cat but she hangs around me all the time because I feed her.
Is there voltage regulation in addition to speed adjustment on that circuit board inside the motor?
The speed adjust is just a voltage regulator. These are cheap motors. Even high end decks used them. My high end technics on the other hand has a direct drive quartz lock servo motor like a VCR used. Much more accurate.
Got a Sony 12v capstan motor thats not spinning, seems dead, want to try this to see I can fix it before I buy a replica, how to get the pulley off without heat as it looks like its plastic
Thanks for how you take off motor pulley
Those mabuchi motors werent known to be too reliable i got a turntable that uses that same motor, rumbles like crazy even after an overhaul and lubrication
Temporary fix for those bushes is to use a nail to gently tap a few dimples into the end faces, so that the material closes up the bush hole slightly, or just tap the faces to flatten them slightly, closing up the clearance causing the rumble. Otherwise find same size bushing and replace it, just has to be same shaft diameter and bush outer diameter. I have had some success turning the bush upside down, so the wear is on the other side that the old place the side tension was, or building up the gap with a sliver of solder.
disassembling and assembling back with minimal side effect to the subject and other parts is the goal and perform by one who is a professional (knowledgeable or expert)..that is as to a doctor operating on a patient.
Nice work sounds great.
That is the difference between fixing it and rebuilding it. lol
7 people don't think I did a good job.
@@12voltvids Haters gonna hate lol Just let it roll off like water on a ducks back
Same problem with many other decks, Aiwa, Sony, Nakamichi because the thing sits unused for years. I need the same 12V CCV 530 Mabuchi motor, but the original Japanese ones are not that easy to get. Did the same thing as you did but the W&F is very high and speed fluctuates. I only scream when I stub myself. You know there's a tool called hammer. F... brushes😤😬
Sitting idle is the worst thing for anything electrical or mechanical.
We should be careful with the motor brushes, is easy to damage them.
I have a cassette player where the motor doesn’t turn at all. Even without the belts attached to it. Does this mean the motor is bad?
hi that's what i said to the tascam john his prices are far to high yes cover cost's as to make money in the long term o have said there's only so many
decks out there needing work on them like you i keep all costs down i look for unit's i don't have i have watched alot of your video 's one's in your past as well
hello i have sony tape model c wr 465 some time stop before reach the end and i must push again what is the problem ?????
can you swap out a motor from another cassette player if the same voltage. .
Need to be same speed as well. There were many different speeds. 2100, 2400, 2500, 3000. All depends on the pulley reduction ratio.
You didn"t cauterize the wound with the soldering iron?
Why would I do that?
How many hours work was required?
Meow!. Great video!
Tried looking for that music track on musicbakery but couldn't find it. Is that the right name or right site?
You mean this one:
musicbakery.com/?s=aggressive
in the end i had to order 2 new motors £6 in total the motors in side were sealed it's a rare 3 3/34 ips duel deck
with a mixer job
Grate job wondering what's wrong w/track playing but hardly can hear that song with all the volumen up.
18:36...you should get yourself a resistance soldering tool for that.
very nice... and BTW... we all have stabbed ourselves doing these kinds of things.. bench war wounds LOL...
Do a tune up video on your car please.
My car doesn't need a tune up. It's brand new. Electric cars don't need much maintenance. My other one is almost 9 years old and the only maintenance that has had to be done to date is new tires. 160,000KM (100,000 miles) on the original brakes and still 80% wear left! Besides costing very little to run, there is the maintenance or non maintenance that has to be factored in.
I would have done exactly the same, there is no fun in just changing the motor I want to see how its made how it works!
Having owned this since bought new KX300U, enjoyed watching you tear apart that elec. motor but gravity and a quality refined lubricant will accomplish the same result as I have done both motors on mine. I disagree with your analysis that this is all plastic, the entire chassis is metal, it's not a SANYO. You should done both motors, just a matter of time before other starts going bad.
Hej, i have an amp of which the transformer starts to hum very loud after running for a while. It wont go away with disconnected secondary so the problem lays in the transformer itself. Any ideas how to silence it?
If it gets very hot running disconnected you have an internal short, which is fatal. if it just hums and runs cool, then you can try to apply a coat or three of polyurethane varnish, preferably by heating the transformer to 100C in an oven set to cool (not hotter, as it will melt) and then dipping into the varnish till cool, and pulling out and leaving to dry for 2 days or so. The hot transformer will expand, and on cooling will pull the varnish into cavities, hopefully curing the hum. Works best with vacuum application of the varnish, but needs a vacuum pot and pump to pull air out under the varnish and then allow ambient air pressure on opening to push varnish into all the cavities. In any case the varnish needs to be fully covering the transformer.
D-lab has a video on how he stopped transformer hum. Pretty novel.
@@SeanBZA Was going to say the same thing. If it is humming when it is warm most likely one of the ferrous plates in the core is loose. Needs to be glued down again. On flyback transformers it was pretty common that the core wasn't sealed, and we would just use a varnish spray can and soak it completely and let it dry. 9 times out of 10 that stopped the squeal.
It's so easy to damage the brushes on disassembly - not damaged here in this video, if someone is reading my comment BTW. ;o)
Recently, I had a suspect 1979, 12v dc motor, for my Sansui SC-1330 cassette deck. Rather than open it up to see if the brushes/cummutator connection was 'dirty', I decided to squirt Servisol into the motor through a hole towards the brush/commutator section. Since then, then motor has been steady as a rock as far as speed stability is concerned. Not sure if Servisol is sold in the US or Canada?
However, an old motor for my Aiwa AD-F770 did need replacing despite efforts to 'save' it. The replacement was a genuine Mabuchi CCW 2400rpm motor. See cassettedeckman.blogspot.com/2020/04/aiwa-ad-f770-capstan-motor-voltage.html
I have a similar issue but for me the tapes play too fast. I have tried the speed adjustment, does nothing, tried cleaning capstan and heads, no change. I have to also manually start the motor. I will now replace the motor and that should fix. Let me know your thoughts or anyone in chat.
Time for a new motor
👍👍
Just the other day I had to replace the motor on the same model tape deck....