Turbo duo won't spin

Drtdiver83 · 04/09/2016, 07:17 PM

I recently picked up a turbo duo that was completely dead. Did a complete recap, replaced both 7805, dropped in a new hop-m3, replaced both ba6209a chips. The system now works great for reading cards but the disk will not spin up. The laser moves and does it focus thing but sits for a moment and just says set disk. Tried turning the pots to get the disk spinning but no joy. The motor works. I pulled it and tested it. Any input would be great thanks in advance.

Keith Courage · 04/11/2016, 01:31 PM

this problem could be a couple different things.

kind of puzzling that if you hit run on the controller and the CD lens moves that a CD will not spin up? maybe the new CD lens you got is bad? it could still be that one or more of the potentiometers are off. It can be very difficult to get them correct if somebody had already moved them out of place before you received the system.

Drtdiver83 · 04/11/2016, 01:55 PM

I got the unit for basically nothing. After opening it up someone had attempted recap but only did a few random caps. After I tore into it a bit I noticed some of the pads were lifted and or missing. So I believe I fixed those that were damaged. I then did a complete recap. And got the unit to power up and play hucards. But no joy on playing CDs. I'm worried that some of the other chips are bad because I tried adjusting the two pots that make the disk spin don't do anything.

wilykat · 04/11/2016, 04:19 PM

IIRC the disc won't spin if the laser doesn't pick up anything reflective at all so it is possible the laser is not able to detect anything. You did replace the assembly so it's possible pot adjustment is needed.

Drtdiver83 · 04/11/2016, 06:09 PM

Would the disk still spin if the laser doesn't see anything by turning pots 102 and 104?

blueraven · 04/12/2016, 12:22 AM

Something could just be stuck. Does the assembly look dirty or heavily-smoked-on? I had a unit that arrived from Japan packed with empty Mild Seven cigarette cartons (no joke) and smelled like a roadhouse ashtray. I had to clean it with alcohol, and gently spin it manually by hand while hitting the run button to free the spindle. I cleaned off the tar and re-lubed the assembly with white lithium grease.

Drtdiver83 · 04/12/2016, 05:46 AM

Everything is clean and rotates freely the laser moves along the rails to the home position as it should.

Xenogears · 04/12/2016, 06:41 PM

Please first do a complete Recap. The Eletrolytic Liquid will be leaked out of serveral SMD Caps, even if you do not see it - it´s there. Clean the Board carefully and recap. Also check for broken VIA. This is much easer, it the caps are not installed yet. Next, even if the Laser shows a red spot, prepare to get a new HOP-M3 if POT-Adjusting after Recap does not help out. And please start testing with an original Audio-Disk for the first steps.

Drtdiver83 · 04/12/2016, 07:14 PM

I have already done a complete recap. I'm now waiting for a second new hop-m3.

blueraven · 04/12/2016, 07:17 PM

That's possible. I've had 1 "new" unit that was DOA.

Good luck with the second laser replacement, and keep us updated.

Everything Xenogears said is spot-on.

Drtdiver83 · 04/23/2016, 08:32 PM

Put in a new laser still no spinning. The laser does its focus adjust then just says please set disk

wilykat · 04/24/2016, 07:10 PM

Maybe the motor driver IC is bad or the motor itself is bad?

Drtdiver83 · 04/25/2016, 12:37 AM

I replaced both motor drivers. I have a spare motor I can try. The motor works fine when I bench tested it. I'm about to give up on this thing but it's becoming a sick obsession that I have to get working or it's going to continue to bother me. I may be in the market for a new one or just the guts that work since the shell I have is in pretty good shape.

NecroPhile · 04/25/2016, 11:15 AM

If you give up on it, send it to steve for his wizardry. If it's fixable at all, he'll get 'er running.

that1crzywhtguy · 02/04/2017, 05:47 AM

Sorry to necropost... I have almost the same problem. I'm wondering if this was resolved.

Keith Courage · 02/04/2017, 08:02 AM

Symptoms of the lens moving but the disc not starting to spin can typically be caused by 3 different things. Bad lens, lens adjustment needed, and possible bad connection in one of the lens wires. usually the farthest to the right red wire if one of them goes bad since it gets stressed the most.

Anyways, 1st thing to try when the lens will move but the disc will not spin up is to try and adjust one of the lens potentiometers. Try turning the V102 potentiometer counter clockwise slightly. I've had this resolve the problem in 50% of the DUOs that I've worked on with this issue. Also, make sure your lens is clean. A q-tip and a little rubbing alcohol will do the trick.