CDROM2 glitches when warm.

[atman]

Searched but could not find any similar problems.

I got the briefcase setup working yesterday thanks to Fidde_se.

The CD could very well read PCE games and played well. BUT, when I play for like 10min it will get unstable. It seems like it can read the games but the grapic will glitch out. Sometimes it will get stuck in a reading loop or someting and freezes.

When i reboot it will start up and so on, but works much worse than if its cold rebooted.

Whats is the problem, is it a weak laser?
Tried clean the connector with alcohol but no improvements.

[Fidde_se]

New caps and maybe a pot tweak on laser...

How's the gear?

[atman]

The gear is new and alright.
Caps and calibration I have no clue. My guess is that caps is original.

Do you do recapping?


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[Fidde_se]

Yes, but can't swear on that it will fix it =)

[Keith Courage]

 Most likely the CD drive just needs some potentiometer adjustment. This is usually the case if the CD drive works fine on a cold start but starts getting glitchy after it warms up.

[atman]

Thanks for the response.

Think I saw a tutorial here on pot adjustments. I will start with that.


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[Keith Courage]

generally any of these 3 pots(circled in red) could be the culprit. So try them first. Just try one at a time.  Rarely ever do the other two need to be changed.

[atman]

Does the white pc engine looks the same?


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[Keith Courage]

Usually, sometimes the pots can be all black.  Either way same configuration.

[atman]

Does it matter if its a CD-R disc?

I mean, it seems like it can read the disc but it glitches. Thought if was any problems reading it would be noticed in the seeking..

[Keith Courage]

Not every Drive is created equal when it comes to reading a CDR discs. So no matter what you do, you could have some issues with them.  Not to mention,  a good majority of the Rips found online are not good.  Meaning they are glitchy and can cause issues. Also, a big factor can be what type of media you are using. I typically find that using something with a lighter green bottom on the disc works better with these systems then higher-quality discs with darker green bottoms do.

[atman]

OK, will get a original silver-disc and see if there is a difference. Might be best to start there and rule out things.

Heard that it might be better if using an old CD-Writer? They have more power or something?

[Keith Courage]

I've honestly heard this about using an old CD writer but I've never noticed a difference. As long as your CD burner can burn at ten times or slower that should be good enough.

[wildfruit]

I use this at the slowest it will go which is 8x, no problems
https://www.amazon.co.uk/LiteOn-IHAS124-14-SATA-Internal-DVDRW/dp/B00ERJXTE4

[atman]

I noticed when I adjusted the pots that the drive was quite warm. (Had the bottom on without screws to be able to test quickly)
Since I had trouble with my IFU I feed it with 10v directly, original is like.. 8V? The 7805 might be warmer than nessecary and cause the drive to get more sensitive.

Just a thought..

Anyways, I have adjusted the far right pot.  Well, it clicked a bit the first time i touched it. But its best in the position it was from the beginning. Also its much better, not 100%, but an improvement.

Will continue with pot tweaking..


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