TG16 CD unit laser doesn't move SOLVED

[MobiusStripTech]

Like the title says, I have a tg16 CD that has a laser that isn't moving. The unit has a brand new gear, new laser, and I tried a known good motor just to be sure.

So here are things I know, the 7805 is getting 10-12v in, and 5v out. At the pins for the motor I get 7.2v on pin1 and 6.7v on pin2. At the 2.5v test pin I get 2.5v. I can apply power and ground to the motor and it will move. I can also see the motor try to move when I press play but I don't think it's getting enough juice.

Please if you have any thoughts share them. I already fixed a power issue in the dock and this is my last hurdle.

Yes I have the original power supply and it doesn't work in or out of the dock.


Solution: The BA6290A chip was faulty. Replacing it fixed the unit.

[MobiusStripTech]

I am wondering if the issue could be related to the BA6290A. Has anyone seen these go bad before on one of these units?

[Keith Courage]

Take one of the gears off and see if the lens motor spins like crazy when you hit play. Could be a dead motor.

[MobiusStripTech]

Even if the motor works when I supply direct voltage and ground to it?

[Keith Courage]

How much power are you sending the motor when you are testing it?

[MobiusStripTech]

It's about 10v. Which is obviously well above what it would normally get.

[MobiusStripTech]

I will try your suggestion though. Maybe it's working just because I supply excess voltage. Although I tried to power a different motor and it couldn't power that either.

[Keith Courage]

Oh, well if you already tried a 2nd motor then that most likely isn't the problem.

[MobiusStripTech]

So just to be safe I tried your suggestion and you were correct. The motor turns. So I guess I have to get a new motor. Does anyone know a part number for one that I can find without taking it from another tgcd?

[MobiusStripTech]

I found one. Actually found an old link you had in a thread Keith. Much appreciated for the assistance. Once I get the new one installed I will update as to whether that fully corrected the issue.

[Keith Courage]

How difficult is it to move the gears using your finger? I'm wondering if there is something binding/catching on the assembly.

[MobiusStripTech]

It's really easy to move. I checked the gears individually to see if there was any damage and did not find any.

[MobiusStripTech]

So the issue has been solved. The culprit was the BA6290A. It wasn't providing enough voltage to move the gears. I managed to find a seller with brand new units so I will be ordering a bunch. I also had a duo with the exact same issue today.

[gtsamour]

Has anyone else encountered a BA6290A go bad on the PCE or TG16 CD unit?

Could this be the cause if a unit that has new gear, new lens and well lubed mechanism (tamiya boron lube) sometimes spins the disc (and seems to be playing fine) and other times not?

Might be the laser (although it is new, I had replaced it myself a couple of years back) but I don't have a new one yet to try... if the new laser doesn't fix it, could it be the BA6290A?
Or is the BA6290A only responsible for moving the laser back and forth? On my system the laser moves but sometimes it doesn't spin the disc.

The 7805 isn't the cause, I replaced it with a new one.

[MobiusStripTech]

The turbo duo I have been repairing also had a bad BA6290A and would move the laser but not spin the disc.