Marantz TDR-830 (Superscope) Tape Deck

[eyg2181]

Note: I posted this exact thread on ak a month ago and got no response whatsoever. Maybe the QQ guys will be a better help.

Ok this very nice Tape player/recorder I just got last week seems to have sped up quite a bit. The heads are perfectly aligned, and the sound is great, but the tape speed is too quick, to the point where it's noticible. I know it's not the belt, and there's no knob or adjustment for the motor speed. So will I have to get a new motor for it, or maybe replace some little parts inside such as a resistor or something? Any info would be appreciated.

Thanks!

 

[JonUrban]

Maybe one of the rubber wheel deals is worn. That would cause the capstan speed to be faster, wouldn't it? It's been so long I can't remember all of the tricks from the old days.

 

[westgate]

Note: I posted this exact thread on ak a month ago and got no response whatsoever. Maybe the QQ guys will be a better help.

Ok this very nice Tape player/recorder I just got last week seems to have sped up quite a bit. The heads are perfectly aligned, and the sound is great, but the tape speed is too quick, to the point where it's noticible. I know it's not the belt, and there's no knob or adjustment for the motor speed. So will I have to get a new motor for it, or maybe replace some little parts inside such as a resistor or something? Any info would be appreciated.

Thanks!

'assuming' the pinch roller might be worn and have a bit of shiny look (which would prevent it from making good contact with the tape/capstan and allow the deck to move the tape faster), what i've done with such a p'roller is to take a fingernail file and very gently hold it against the roller while it is turning. just barely scuff up the surface, that's all.

this is easy to do on a r2r; with a cassette deck, it might be a tight fit or there may not be room in the cassette well for the file to fit at all.
in such a case, very fine grained sandpaper might work if you can find a way to hold it against the p'rollers surface.

i've done it on both types of decks, including two of my nakamichi cassette decks and my teac a-6300 r2r, successfully.

if said shiny, worn roller turns out to be the probem, this type of fix may only be a temporary one and you may eventually have to replace the pinch roller.
but the ones i've done it to, are still working properly after ~9 months or so.

and as always,

YMMV

edit-being a marantz, i guess it's a cassette deck, right?

 

[eyg2181]

Nope, 8 track deck

 

[westgate]

Nope, 8 track deck

oh. crap!

hey, i tried.

edit-well, actually, if you're gonna take it apart anyway, to where you have access to the roller or whatever's in there, maybe consider using the procedure i mentioned. if applicable.

at any rate, good luck!

 

[eyg2181]

No problem, i appreciate the input anyway. maybe i could sand the drive pulley a little bit.... or add something to the driven one?