Hi have got the precise same issue on my deck a ver 2 type installed in a 9300 Center - no head and no transport - can a belt failure cause the heads from not rising as mentioned in this tread ? The failure is intermittend. I do also suspect the tape casette Micro switch to be bad as the deck seems not to see the tape in the slot but do not Know if that is prone to fail. 

The belt connects the motor mechanically to an idler wheel and two flywheels. Under one of them there's a cam that actuates the gear that drives the heads block up and down. It's quite normal that a failing belt could cause a whole lot of issues, especially on a single-motor mechanism.

Hi guys

Had same problem with my 2500. Proper cleaning and few drops (really small) of thin oil to right places did the trick. Cassette side is probably used quite seldom in many cases so every part of it gets sticky.