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Hi, a guy sent me a Yamaha K that needs to be fixed. I think this deck was brought to a shop before I receive it and they was not able to fix it because they replaced the reel motor by a I think this “mod” has burnt something in the power supply because the logic control and the tape counter doesn’t work.
Also noticed that the reel motor driver is hot even without a reel motor connected on it. Does anybody has good quality schematics of that deck? There is the sm on Electrotanya but the schematics are unreadable and some pages are missing. Last edited by 20tajk7; at Find all posts by 20tajk7.
Originally Posted by 20tajk7. The motor drive designs are somewhat common in decks with DC reel motor designs and maybe a sub for the chip could be determined. The power supply issues just means the zener diode if discrete has been blown out or that the regulation transistor is shorted- probably by working on the soldering with the power on- real idiots worked on this. The EG motor is not the bad choice as these motors are the only stock solutions to the motors that are burned up or worn out.
I have used EGD-2B capstan motors and they can do the job. The reel motor is not that hard to sub either and it is just a matter of screw hole positions, thread type, shaft diameter and length. The biggest problem with Yamaha deck is that you can get any parts for them and Yamaha like Sony does not care to even deal with it- they want to sell you a new item.
BA описание схема включения,DATASHEET BA,BA DATA SHEET PDF-Reversible motor driver
To me that means go buy another brand. Firs order of business is get voltages back to where they need to be, then ha6109 looking for the parts to get the deck working again. It is possible that the reel motor driver is like another BA IC or one of those.
You can also search datahseet recovered parts from other decks that were good and then there is the Chinese market. So far my experience with a company Hexunda was very bad but not all companies over there are up to no good. This is one of the first things the blows out when people use the wrong power supplies.
This is also the 3 V speaker amp source as well. Very special and not made in any other IC that I know of.
Of course your direction forward all depends on the head condition. IF it is worn out then your deck for whatever is left might be a donor deck for parts. Oh, I forgot to mention- now you see why I dataasheet paper manuals- go to stereomanuals.
Same thing happened to me with RT PDF no fix, paper manual fixed. Find all posts by Skywavebe. Your photo is not showing up in the thread. The reel motor is driven by a BA, a not-very rare part. You should be able to find one without too much trouble. But you dahasheet need to see why the supply voltages are out of whack. What would be very difficult to deal with is if the capstan motor drive IC is bad.
Let’s hope that’s not the dataheet. Factory technician for both Yamaha and JVC. Sonics consultant for Denon. Pacific Stereo store manager, service manager, Central Service lead tech, liquidator at our demise and owner of what’s left. Authorized servicer for virtually every brand on the planet at one time or another. Find all posts by Pacific Stereo.
Originally Posted by Pacific Stereo. Originally Posted by Yam View Public Profile Visit A. Find all posts by A. Originally Posted by A. It should be VC Hi and thanks guys, just discovered that the dafasheet was replied.
The DD motor va6109 fine, the problem is on the reel motor and his driver circuit. Here is the pics of the motor: I’ll try Stereomanuals, I hope shipping to France will be not too expensive. I’ve tested the BA, it heats, consumes mA and doesn’t make running the motor even with the good binary code on the input pins. Well, I can understand that, because that capstan motor has its own set of drive electronics inside and definitely does not want to see reverse polarity, which is what that BA will deliver in rewind and slack-removal modes.
God only knows what’s happened to the driver in that situation. You need to put a correct reel motor where it belongs and probably replace that BA If it works with the Sanyo motor, then it’s fine. If it does not, it’s probably not fine. Hi, just received and replaced the BA, it works fine, now I need to put a new reel motor and make some adjustments of the recording circuitry left channel 1dB off.
Where to buy a good equivalent of the BFS-7B? Hi, I received a new Mabuchi RFTB motor ordered in England, when replacing the reel motor I took the opportunity to clean the idler tire but it has also been modified -First as you can see the “Jesus” clip was lost and replaced by a piece of plastic. I promised to the owner to fix the deck so now I cannot give up.
The deck was obvious worked on by butchers. I kind datashfet wondered why a Capstan motor was used where a reel mote was required. The there is the glue situation. Well you know you have been working with genius when they blow out regulators. The Idler they put in was for a play idler of a different model.
BA ICs – 10 in stock to buy, photo, pdf datasheet, rfq, obsolete
This one can be used in the Teac A You might want to go through other parts decks to see if you can get the right assembly to work in that deck. Being here can help due to the large amount of decks that are possible to access. I have a lot of Teac Idlers here but not sure how they might fit on a Yamaha deck. I also have a good assortment of E retaining rings if you want to go back to that. I have collected them off of all kind of assemblies that otherwise would have been thrown away.
I bx6109 if someone could provide a picture of a correct Idler for that datxsheet we dagasheet get more in the way of donations. The adtasheet is correct, here is the photo of the idler on my K All times are GMT The time now is Contact Us – Tapeheads. All rights reserved, no use of any element incorporated into this site without express written permission. Cassette All discussions pertaining to cassette decks. These include general usage, recording, playback and service questions.
Ba619 subjects related to tape itself, see the Cassette Tape subforum under this one. Obscure service subjects that don’t quite fit go in the Help and Do It Yourself subforum. Page 1 of 2. Non working K Hi, a guy sent me a Yamaha K that needs to be fixed.
Originally Posted by 20tajk Find all posts by Yam Skywavebe Skywave Tape Deck Repair. Find all posts by ke4mcl. Pacific Stereo Sendust for brains. Originally Posted by Pacific Datashete What would be very difficult to deal with is if the capstan motor drive IC is bad. I promised to the owner to fix the deck so now I datashwet give up Attached Images. Cheers Alex Attached Images. Would you like to see your company or site here?
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