Toshiba RTS90 (play back speed)

[mark]

I’ve got two of these and both have the same problem. Main capstan motor spins fine but the take up motor spins way to fast while in PLAY.
Other issue is the humming or feedback noise while playing a cassette. I’ve read the other post regarding the issue and will try to continue where they left off.
I’ll start by replacing all the ICs on the deck, from what I understand some of them control speed and direction of the motor. Others would control music search functions….
I’m also going to replace the ICs on the “ADRES” board.
All other function on both boxes work great. AM FM, AUX
No service manual for this model regardless I will will these!!!!!

 

[Tinman]

I never had one but most players have a clutch on the take up reel.
It's possible that it's not slipping.

 

[Superduper]

Well, if you are running that 100v boombox on 120, the take up motor is going to spin very fast because it's getting more voltage than intended.