Question about CD Players
I have a late 80's vintage Yamaha CD1050 CD player that is skipping. I've disassembled it & noticed when the actual player chassis was removed & tipped on it side with all the cables still connected it worked perfectly. Lay it down flat & it starts acting up straight away. Tip it up sideways again & perfection!
Any ideas on what the problem is. It had 2 or 3 trips to the service centre in the early 90's for the same problem but that was years ago & I don't know what he did to fix it. I notice that the servo motor that drives the laser position moves in stages rather than moving constantly. It must be the correct action as when it playes up you can see the motor hunting back & forth.
I don't want to toos it as when it works - it's great & it certianly hasn't had a hard life. Cripes it hasn't done anything for the past 5 years but collect dust as we've been using the DVD player to play CD's on.
Know the unit well. you gotta fix it!! They sound good,and were well built. It will better your dvd for cd playback!!
It is probably mistracking as a result of the chucking assembly hopping in and out of a pit worn into the small white plastic retainer that clips into the large black assembly that raises and lowers the circular black disc that clamps the disc to the spindle motor platter. A half ass fix is to reface the plate, but watch for clearances to the disc being affected.
You can tell the problem by lightly resting your finger on top of the assembly while the disc is running and feel a regular knocking as the ball bearing in the clamper disc, and thrust plate knock in and out. Replace the small white plastic thrust plate and put a dab of decent graphite grease on it. You may also find that the spindle motor is worn also... It produces the same symptoms and can be diagnosed by putting a drop of oil to the top bearing and see of the problem goes away. A lame motor also sounds noisy, not that different to an old diesel engine rumbling away.
Lastly, get a set of load belts for it also. Would be a shame to do all that work and find the drawer jams - always when you really want to use it. Clean the drive belts at least, but replace if perished.
Good luck with your overhaul... I know you can fix it as you have gotten pretty much there already:) A rating of "fixYa" for my tech tips would make me a happy boy
Posted on Feb 17, 2008
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