PC Engine Duo-R cd problem

[thesteve]

Forgot to say without disc

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[sniper]

Forgot to say without disc

Oh, right! So, if I don't have a disc on the spindle and hit the "Run" button, the laser moves to the spindle, bobs up and down once or twice, and... that's it. I can see a red light coming out of the lens during this process, which then shuts off once it realizes there's no disc there.

[thesteve]

Perfect
Now you know the motors work and logic is right
Folow pot adjustment thread
If it doesn't adjust easily try again after slightly adjusting the pot on the laser

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[Keith Courage]

It really sounds like the adjustment is off or the lens is dying.

[sniper]

If it doesn't adjust easily try again after slightly adjusting the pot on the laser

Cool, although is that a different pot than the other four (101, 102, 103, and 105)? Or are you talking about 102, which I think is related to the laser?

I vaguely remember there being something that looked like a pot on the side of the laser sled itself... I think it was white.

Just want to make sure so I don't make my problems worse

[sniper]

There is a pot on the laser sled-- a gray one-- and it was turned down way too low. Now the laser attempts to read all the way across my audio cd, from the spindle out, only to get to the very outer rim of the disc and then fail.

Keith Courage offered to try his hand at fixing mine, and I'm just going to take him up on the offer at this point; I've already sunk a good six or seven hours into this and still don't have it working.

Thanks to everyone who has given me troubleshooting advice!

[thesteve]

thats the one
it should only need adjustment once as its an autocal function

[sniper]

Thanks to Keith Courage, my Duo-R is now totally, 100% functional! Played some Ys Book I & II tonight, not so much as a hint of problems. And if anyone is curious, doujindance was very nice about giving me a partial refund to cover the repairs.

Thanks Keith Courage!!