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Put the mechanism back in place, cleaned all switches and pots with Deoxit/Fader Lube, cleaned fuses and holders. Was feeling very good.
Plugged her in - released micro switch - it started the capstan motor for about 10 seconds - then nothing. Also seemed like FF was going - though I may have hit that button.
It blew the 3.15A fuse - which I assume is for the motor. Damn it. I hope I didn't screw anything up taking motor apart.
I seem to recall a lost e-clip. Maybe you just found it. You just need to find out where you found it. Barring that, you could have a broken wire seeking a new connection, a pinched wire, a component that got twisted, bent over or broken, etc. In any case, schematic reading and interpretation is required.
While I had the mechanism out again I thought let me try turning unit on and pressing FF without the mechanism connected. Thinking this will tell me if problem is on a board (like a short).
AOK. Of course since the counter isn't connected it pops back off but no fuse blowing.
So I'm thinking it has to be something I did on the mechanism. And if it was the FF motor why would it work in reverse? Has to be something specific to FF :scratch2:
Took mechanism apart to make sure nothing was physically binding. I saw this transistor on Control Assembly board that looked bent but appears to be OK as far as leads.
Tomorrow I'll reassemble and disconnect one of the FF motor leads - MTF suggestion - and see what happens.
I've been looking all night and can't find any pinched wires or bent components that would be the cause. I also used air can to spray all around the boards in case that e-clip was hiding.
Does it blow a fuse without a cassette insterted? (Holding the sensor button and pressing FF?)There is a lot of friction involved in getting a tape deck to work. I am almost wondering if there is too much friction on the idler now with the new pulley and tire. You may want to move the spring on the idler to the next notch and see if that helps.
Most likely you inadvertently did something to the deck during repair that is causing the fuse-blowing.
If not, and it's a new defect, then test those diodes shown in the previous post with "diode test mode" on your meter. If good, then test all other diodes on the transport control board. You usually don't need to remove them to test. You are likely looking for shorted diodes.
You can also look for shorted caps and shorted transistors with 'diode test mode'. No need to remove them (if you are just looking for short-circuits).
Thank you all for your help. I'm exhausted tonight and don't want to dive into this without patience.
I'm a novice an keep thinking I must have done something in the re-belting process. I certainly shook things up enough looking for lost e-clips :yes:
What gets me is it works in reverse. So the brake solenoid and motor work in that mode. So it's got to be a component specific to FF or a short in that switch or stream...
Damn it. I'm thinking of Deep Throat - I'm 3 inches from heaven :sigh: