General Category > Lisa Troubleshooting and Repair
Lisa Video, ProFile power issue, NiCad Leak fixes, etc.
AlexTheCat123:
I just fixed the problem and now it spins up without the transistors overheating, but the method that I used was hilariously stupid. I figured that it just needed to be spun for a while to loosen things up, so I rigged up a contraption using my dad's drill press, a hole saw, and a roll of electrical tape (don't worry, the electrical tape, not the hole saw, was the thing that actually touched the motor) that would spin the drive for me. I let it run for a few hours and the spindle motor felt a lot easier to spin afterwards. I tried powering it up and it spun up much quicker than with the hair dryer and now the transistors are running much cooler. It's really loud, so I'm going to let it run upside down for a few hours to redistribute the grease and quiet it down and then I'll reconnect the analog and controller boards and see what happens. After all of this work getting the spindle motor to spin, I sure hope that the drive is good!
AlexTheCat123:
I connected the drive to the controller board and fed everything the correct voltages from the ATX power supply, but the ready LED still does the three flashes, pause, and two more flashes thing that it did with no drive connected after it waits around 20 seconds for the drive to spin up. I'm assuming this is an error code of some sort, but I can't find any documentation on it, so what does this mean exactly?
rayarachelian:
Congrats on the motor spinner you've rigged up.
Wondering if maybe you missed a cable or if something's loose? You saw that 3 blink error before when you powered on without the drive present...
AlexTheCat123:
--- Quote ---Wondering if maybe you missed a cable or if something's loose? You saw that 3 blink error before when you powered on without the drive present...
--- End quote ---
I've checked and reseated the cables and they all look fine, but I'm still getting those blinks. The stepper motor for the heads isn't moving at all, so maybe there's something wrong with the circuitry that drives it?
patrick:
--- Quote from: AlexTheCat123 on June 04, 2021, 10:42:34 am ---I connected the drive to the controller board and fed everything the correct voltages from the ATX power supply, but the ready LED still does the three flashes, pause, and two more flashes thing that it did with no drive connected after it waits around 20 seconds for the drive to spin up. I'm assuming this is an error code of some sort, but I can't find any documentation on it, so what does this mean exactly?
--- End quote ---
The Ready LED just indicates the state of the /PBsy pin. The controller does not provide any fault codes.
After Reset the controller waits 18 seconds for the spindle motor to spin up and tries to read the spare table. If this works, all 0x2600 block are read one after another.
You can disconnect the controller cable and leave only the motor connected. Then move the step motor manually while the spindle is running. This should not require much force and should not generate unusual noises. Move it back to its parking position is at the outside, far away from the track zero sensor, before stopping the spindle.
Never move the heads when the drive is not spinning at nominal speed!
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