Turned the trimmer capacitor (trimpot) for laser power with a good power supply installed and it now reads commercially pressed games fine. The laser had trouble reading a Taiyo Yuden CD-R with CD audio on it, a little bit more of a turn and it played perfectly.
It is amazing how much of a difference a one or two degree turn of a trimpot can make. Unfortunately though, by doing this the laser gets more power running through it and is most certainly on the way to failure. The good news is that it was assumed completely dead, which it is no longer!
I am trying to work out why the power supply is dead in the above Saturn though. With the good working PSU from the other Saturn installed it works fine. And with the dead PSU in the good working Saturn it doesn’t work either. Nothing looks to be blown and none of the blue capped varistors are blown as they are all showing no continuity. The capacitors are all showing resistance.
I am considering hacking apart a PC power supply to see if it can run on the +3.3V, +5V and +9V rails. I am not quite sure how I would get +9V though if there is no -3.3V rail in the more modern ATX power supplies. I need to get image upload working to show pictures of all these things I am working on.
Edit: Lightbox works now on pictures! Also pictures are now showing.
Received a Sega Mega CD 1 today with a Sega Mega Drive Model 1 on top of it. Pretty rough shape but does function. Pulled it apart and found rust / liquid residue. The fuse has been replaced with a solder blob. Will need to replace the fuse after cleaning it up as best I can. It also seems a bit slow to recognise music CDs, when it has identified them it will run through the disc fine. Both my Mega CD 1s have JVC lasers.
Also got two model 1 Saturns in the mail, one apparently had a dead laser and the other a dead PSU. The guy I bought them from said he was going to swap them together to make one working unit…. but they weren’t compatible. I swapped them over and one of the units works fine now. PSU’s were identical. Need to swap the PSU back into the other Saturn and check the laser is actually not working.
Both models have different mainboards, one of them is a 64-pin model that looks the same as my Model 2 Saturns – more spares for one day in the distant future.
Long live 90′s gaming!
Received my Sega Mega CD 1 from Germany yesterday. Pulled it apart and had a look on the inside. It has one of the dreaded JVC Optimus 5 lens. It’s next to impossible to find a replacement lens for this model nowadays.
Welcome, it’s a bright and chipper day outside. It’s just past 8am and we have quite a task ahead of us this week – to get this blog operational.
As the weeks go by I’ll be adding in photos, but first I need to work out the menus I want and a nice theme.
Standby for more.