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If it deck doesnt react at all (no movement or sound) the play-pushbutton could be defect. If the servo does react (click sound) try cleaning the belt and wheels attatched to the long, small motor that is closest to the power supply circuitboard. It has a small white wheel driving a large black wheel with segments. If this does not do it then remove the motor-screw closest to the (left) side of the deck, turn the motor a bit upwards (increases tension on the belt) and fix motor again in the newly appeared hole. If this still is not enough, rotate the belt 180 degrees so you get a mobius ring loop. This further increases belt tension. If this still doesnt work, replace belt, rough up the motorwheel or start praying. Hope I helped you. Eric.
The take-up reel is dragging or the belt is stretched or broken. No surprise on a deck this old. Try Fast Forward. Try Rewind. Same result?
If it still doesn't work, and it happens with only one cassette, rap the cassette's flat side against a solid flat surface to loosen it. Try again.
If you're really an old-school deck user you probably know how to cheat the transport with no tape resent to make the capstans engage for cleaning. Try that. The two reels should spin opposite as if maintaining tension. If the right one is stationary or lethargic (try to feel how strong it pulls compared to the left one), there's a loose or broken belt.
Next step. Get out the can opener, go inside and see what's wrong. Good luck.
I have a counterpoint to the above statement. BarryMusic is correct that the AVERAGE cassette deck is worth about $20 bucks. You know, those piano keyed wow and flutter hiss monsters made from plastic Tupperware bins. However, the AKAI GX-F91 was at the pinnacle of cassette deck technology, just predating the release of CD. While never quite reaching the cult status of the Nakamichi Dragon or a few Studer Revox units, a drab one will easily fetch $200-$400 dollars as a PARTS MACHINE. A fully restored GX-F91 in the right market (Japan, Europe, the Middle East) can go NORTH of $1000. An all time high I saw was $1717 for a cherry machine. http://www.audio-extasa.eu/akai-gxf91-cassette-deck-p-648.html
My name is Ed, I have the Akai GX-747 Reel to Reel, my problem is when press the play button it engages but the capstan does not spin up to the pinch roller. The reels do not turn.
My e-mail - firstname.lastname@example.org
The unit sounds like it has a take up clutch or takeup idler problem. Check all the drive assemblies in the unit. Remove the cover from the front of the transport inside the cassette well, and check the condition of the idlers and reel base drives. The counter belt can also gatherup and prevent the takeup reel from working correctly, or fire the auto stop mechanism preventing it from playing, although that sounds to be ok in this case as the unit will FF and REW ok. The takeup drive is supplied by a different drive idler as it requires much lower and more controlled torque. This unit was always considered to be a great tape deck and is well worth a bit of attention for restoration. You can get a new belt kit for $19.00 from here
I am more than happy to answer
any other questions you may have about it, just give me a hoy :)
Thanks for using FixYa, If you consider the advice I have given you
as sound, a FixYa rating is a great reward for my efforts to help