It’s a T5*C. the * just denotes the cabinet style. There should be a brass tag on the back at the very bottom with more information. These were the last Tone-wheel Hammond. Solid state amplifier, interesting set of features (built in “Leslie,” chorus/vibrato, assorted selectable key percussion tones, and the built in rhythm machine at the top. Paying for repairs is not cost effective, these aren’t valuable in the least to most collectors but if you are patient you can learn a lot about how it works and repair it yourself. I have one of these (a T582C) and I dig the kind of odd sound of the thing. I probably use it almost as often as I use my ‘57 C3 so needless to say I’m a fan. A common failure point on these and an easy place to start looking is the wires soldered to the drawbars tend to snap off. I would open up the back and take a look there first. Give it a good cleaning and start looking for loose wires. (Don’t poke around with it plugged in of course.