Yamaha KX 300U Cassette Deck Repair and Testing 

Watched hoping to find out about head and capstan transport for my K300. Anthony didn't quite go that far into it for this exercise but IT IS VERY CLEAR THAT HE KNOWS WHAT THE HELL HE'S DOING; thank you sir!

Great job Tony 👍

I bought one of these decks new back in '88 as well and still have it. Just replaced the counter belt, which I suppose has something to do with why I stumbled across this video ;D

Thanks for making and sharing this video on RU-vid. I see a lot of expenses test equipment around your work space. So when you speak of how to check out this or that, and that you shouldn't needn't to adjust this tape head, and I could go on. But a big thank for the video.

Hi, great video, thank you for making it. I am servicing the Yamaha KK400 tape deck and cannot get the tape transport to open when I put the tape transport back in the deck, however it opens perfectly when the transport is out of the deck. It doesnt seem to be catching on any thing when it is installed in the machine. Very frustrating!

Excellent video. I would have loved to see some more indepth calibration, but I realize with out any test/calibration tapes its next to impossible.

Hi! Thank for this great video! I have a different issue with my KX-300 : the record and play heads bar in the bottom doesn't come up once I press play (the motor spins the tape, but that's it).

Hey! I have the same deck, and for some reason, the head mechanism won't engage. I was wanting to take the transport apart, but on the backside of the transport, there is a metal support that was bent, seemingly to keep that small board in place with the cable connectors. Did you have the same thing? If so, how were you able to bend the metal piece to remove the board and get to the last screw on the back of the transport? I really don't want to hurt my unit, but it just stopped working suddenly so it needs help.

Hi,

Great video. I have a Yamaha K31 I need to adjust the speed on but the motor doesn't have the hole for the screwdriver. Any help?

You said you got a 'bag-o-belts' for that counter. I just bought a KX300 and it has the same problem you had. Other belt seems to drive okay. But just wondering where you got the belts on Ebay. Let me know if you can. Thanks!

I just picked up a KX-500U. The tape counter is not working so I feel certain that it will need a new belt for that. Can you tell me the part number or where you got the counter belt for the 300U? Do you think they use the same belt? Thanks for the video!!

Is it hard to replace the pinch roller on this transport?

Hello. Can I do you a question about my Yamaha deck? I changed the counter belt. After power on the deck and It begun to do noise and hit. Can you help me?

I have the Yamaha K-340.....No sound out of one side. Any ideal what could be wrong with it ?

How do i change the belts?

Why did you start from 1kHz up? Why not from 440Hz or even lower like 160Hz or even less?

That's my deck. Bought it new in 1988. Still running on original belts. One question though, I've noticed that when you first press play, the sound is muffled and then immediately clears up. Any idea what that could be?

Капаците вътре и дъното заводски ли са на точки ?

Tape counter not fixed, it seems