CDROM2 repair help - no cd sound :/

[gojira1954]

Hello all,
I've got a CDROM2 briefcase that doesn't give sound from the CD - plays original discs fine but not CDRs.
I have recapped the CDROM2 unit as per the excellent guide here but still no sound from the CD, game effects are fine of course.
Any advice on how to repair would be apprciated - I looked in the IFU and there are loads of caps, could they be the cause of no cd audio?
Also how to adjust the pots without a scope so the drive can play CDRs?
Thanks for your time,
Paul

[chop5]

power the cdrom by itself and play a music cd and put in some headphones. if you get sound its fine and its the ifu. the ifu caps may be fine so check for broken solder near the av plugs.

[gojira1954]

Many thanks for the good advice
Audio CD plays fine... I'm off to buy yet more capacitors I guess :s
Anyone have tips on getting it to play cdrs please?

[BlueBMW]

Best advice for CDRs is to use high quality 650mb discs if you can.  Burn at very slow speeds (1x or 2x if possible)  These old drives just dont read them well at all.

[gojira1954]

I bought some ridiculously expensive (for what they are) taiyo yuden archival cdrs, burnt at 1x... works okay on a duo but not on this cdrom2 :/

[wolfman]

I bought some ridiculously expensive (for what they are) taiyo yuden archival cdrs, burnt at 1x... works okay on a duo but not on this cdrom2 :/

Try burning them at the highest speed possible, the slowest way not always works. This did the trick for me. Generally a drive works best when it is calibrated well and has all caps replaced. Then it even reads noname CDRs.

[thesteve]

drive condition/calibration and laser quality effect CDR play
try cal with a burned music CD

[gojira1954]

I don't have an oscilloscope... I was checking out this page;
http://console5.com/wiki/Turbo_Grafx_CD-ROM_Drive
But I'm unsure which pot to mess about with out of the selection :s
What to do please?

Will try burning at 40x now too thanks

[wolfman]

I don't have an oscilloscope... I was checking out this page;
http://console5.com/wiki/Turbo_Grafx_CD-ROM_Drive
But I'm unsure which pot to mess about with out of the selection :s
What to do please?

Will try burning at 40x now too thanks

If you are not sure that you can do it yourself try finding someone who can. Where are you based?

[gojira1954]

I would like to try myself... I'm in the UK tho
Got this far with RGB modding and recapping - time to buy a USB scope?

[cjameslv]

I don't have an oscilloscope... I was checking out this page;
http://console5.com/wiki/Turbo_Grafx_CD-ROM_Drive
But I'm unsure which pot to mess about with out of the selection :s
What to do please?

Will try burning at 40x now too thanks

If you want to get a good oscilloscope and not spend alot go this route: http://www.gabotronics.com/oscilloscopes/xprotolab-portable.htm
They work great and also have built in multimeters. Very handy tool (use it anywhere) i personally love this thing compared to my old tektronix.

[Keith Courage]

If it won't play CDrs then the lens is either bad or the pots need some adjustment.

regular Sony CDRs are good enough. I've never noticed any increase readability with expensive CDR discs at all. Waist of money.

[thesteve]

i dont expect that handheld 0.2Mhz to read the RF signal from the cd

[gojira1954]

Well the taiyos were 40p a disc which is comparatively more... I also have a duo which is working okay so they weren't a waste...
On this CDROM2 originals read okay indicating the laser isn't dead so I'd like to 'adjust the pots' but don't know where to start :s
Ordered up the caps to do the IFU, I will post a pic with location/values shortly

[wolfman]

i dont expect that handheld 0.2Mhz to read the RF signal from the cd

What about the DSO Nano Quad from Seeed?