looking for parts sega CDX

[mastamuzz]

I am searching for a replacement for the lens carrier, is the dented plastic rail that moves the lens.
if you have it and willing to sell it please let me know.

or if someone haves a reference of another cd player I can cannibalize it from it will be greatly appreciated.

[fletto]

I have some assorted CDX spares here... I'll look for it and take a pic to make sure it's the part you need. I'll let you have it for the grand total of zero dollars. What country are you in?

[mastamuzz]

thanks a lot and welcome my friend, I posted this picture please let me know if you have it.

DSC_0412.jpg

sorry is a little bit blurry cause I took it with my phone, I hope it helps!

thanks again!

I forgot I am located in Vancouver Canada!

[fletto]

Hey there Mastamuzz, yep, I got that part. PM me with your mailing address please. I'll try and ship it next Tuesday tops. I'm currently stranded in Brazil where postal services are, um, slightly postal but hopefully you'll be getting it within 3, maybe 4 weeks.

[l_oliveira]

Hey there Mastamuzz, yep, I got that part. PM me with your mailing address please. I'll try and ship it next Tuesday tops. I'm currently stranded in Brazil where postal services are, um, slightly postal but hopefully you'll be getting it within 3, maybe 4 weeks.

Ya that sums it pretty good...

Good luck to the OP with the repair ... Also remember to check all the capacitors !

[bart_simpson]

don't forget a tiny spring as well don't lose it as i would be hard to replace.

[fletto]

Alrighty then, both gear and spring are on their way North.

Go to
http://www.correios.com.br/servicos/...streamento.cfm
and then type in the tracking code: RE583460377BR

I chose the 'damn sluggish' shipping option cuz the faster 'cold molasses' parcel would cost me like 70 American. Sorry. Anyway, your CDX should be alive and kicking in a month or so.

[mastamuzz]

Fletto Obrigado irmão!

really thanks a lot my friend!

I have no words to let you know how I feel.

Ill post a summary of the repair including a lens swap and a bios change for everyone, like those Disney stories sort of thing!

[mastamuzz]

quick post to let you know is not ready yet cause I am still trying to find time to finish it, so far the pieces that fletto was so kind to send me are already in, but the bios swap is taking longer than expected, right now the only game I can play with my CDX is called patience and I will have lots cause I know troubleshooting this baby is not something you want to do, so Ill try to do everything right the first time!

So far pic:

The original bios is off and I started wiring to install the replacement region free bios.

[APE]

Don't suppose I could get you to post a high rez macro shot of the BIOS area without the chip on there? I've got a CDX with a lifted trace that is in the spot with the two wires.

[mastamuzz]

hopefully it helps, but I'm not a good photographer and my hand is caffeine shaky most of the time, if there is something you specifically need let me know.


now my stupid comments with no value at all, it seems that there is a hidden layer below the visible one cause those traces don't go to the other side, this makes me think that if one trace is screwed the system is gone.

[ApolloBoy]

It looks like those pads go to vias, although I'm not sure if they go to the bottom of the PCB or if the PCB's actually multi-layer.

[fletto]

It looks like those pads go to vias, although I'm not sure if they go to the bottom of the PCB or if the PCB's actually multi-layer.

The bottom PCB (the one with the core Genny/SCD logic) is indeed multi-layer, I can't tell whether it has three layers, with the middle one being ground, or four (the canonical signal-power-ground-signal layout.)
Those pads from the BIOS go either to the 7.67MHz 68K or the how-big-a-boy-are-ya 315-5660 VDP/Glue IC. I guess you've been having decaf recently, Mastamuzz, 'cuz your soldering looks great. :D If anything goes wrong we can check on my CDX's here what goes where and then solder jumper wires to bypass any eventual damaged track or via. Looking great, methinks it will work fine.

[l_oliveira]

The bios go to the MD 68000 and the MEGA-CD ASIC at the same time. It's the code which is run by the 8MHZ 68000 in the Mega Drive. The 12Mhz 68000 has no ROM at all. It's held in HALT by the ASIC until the 8Mhz 68000 uploads the unpacked CD BIOS to it's RAM then kicks it through writes to the ASIC registers.

Ape: It's safe to connect the broken BIOS traces straight to the pins of the 8Mhz 68000.