joseph77
Well-known member
Does anyone have a close up picture of a Pengo with a switching power supply installed? I would like to install one in mine, can't seem to get it to work.
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I also need help installing a switching power supply in a Pengo.
I don't recommend this method. While it works fine for the 12v audio amp supply, you're running the 5v into the reg circuitry. The 5v from the pwr supply won't be high enough to get thru the regulator correctly. You'll end up with low 5v. Jump the 5v direct to the 5v rail on the board and you'll be ok.
The early Pengo boards were very similar to Moon Cresta, and that used the on board 5v reg circuit.
http://www.crazykong.com/pcbs/G - O/MoonCrestaSega.pcb.html
If you guys need more info I can get lots of photos from the inside of my Pengo which came with a Switcher already installed.
If you guys need more info I can get lots of photos from the inside of my Pengo which came with a Switcher already installed.
Pictures of my boards, not sure if they are a earlier board or a newer board?
On the surface that looks like the same +5 regulator circuit as Pac Man. I'm tallin ya, I did it for YEARS without any issue at all. As a matter of fact if I did have a board with a problem it had a bad +5 regulator and wouldn't have worked in an AC wired cab in the first place. Thats why I pointed out that the +5 should be turned up on the power supply. I even wired up MsPacs that were on the route this way. Long gone was the AC ripple, the bad edge connectors, bad fuse holders. And did I mention that the board runs cooler?
Its up to the guys asking... I know it works...
BTW, that Moon Cresta board looks a lot like a Galaxian board!
Glad to see someone else thinks this is a poor method.I don't recommend this method. While it works fine for the 12v audio amp supply, you're running the 5v into the reg circuitry. The 5v from the pwr supply won't be high enough to get thru the regulator correctly. You'll end up with low 5v. Jump the 5v direct to the 5v rail on the board and you'll be ok.
Glad to see someone else thinks this is a poor method.
Poor?? Why? Oh yeah, this is a mission critical computer on the space shuttle so it HAS to be perfect right?
The way I described adding a switcher to an AC powered Pac/Pengo DOES NOT require any modification of the board whatsoever. This means that the DC powered Pac board can be moved to an AC powered machine without any wires needing to be cut... WOW, thats friggin cool!
I've been adding switchers to Pac's since the mid 80's and It never failed to work. As a matter of fact while the AC powered Pac's kept coming back into the shop for various issues (bad edge connectors, bad caps on the board and fuse holders) the machines I modified to run with a switching power supply NEVER came back until the monitors failed.
Besides, all of this talk of an AC Pengo turns out to be for nothing. The OP has a DC Pengo so installing a switcher would be super easy.
EDIT: Never mind the statement about the OP's Pengo. We still dont know if his machine is AC or DC.
Ugh...