#atari #atarijaguar #repair #TheRealPhoenix
Hey everyone, the return of the Jaguar from the last time, but with real issue this time. I’ll also add the correct diode to protect reverse polarity PSU and never have this issue again.
Here’s the parts list:
– U38 (Main +5V Regulator): MC34163DW
– C134: 330uF 16V
– C150: 220uF 10V
– R169: 0.1 OHM 5% 1W AXIAL
– Diode for protection mod: 1N5400 (protection up to 3A)
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Not another one. lol
Really not the best hardware design, the poor Jag.
They were using a 9-10V unregluated PSU to start with, so they could have easily added the diode for reverse-polarity protection.
Sometimes, when the DC-DC chip dies, it takes out the audio opamp as well, or I think the opamp might run directly from the 9V supply?
That happened on the Jag I bought on eBay (as faulty), which is my only Jag now.
Another weird quirk with the Jag, is there's a pin on the cart slot which gets grounded when you insert a cart.
And that tells the DC-DC chip to start up.
So if you don't have a cart in, you won't even see the power LED light up. lol
That made quite a few people think their Jag is broken, including the guy I repaired a Jag for a few years back. Easy mistake to make.
Are you saying he used the wrong power supply? Wrong voltage? Reverse polarity? Both? Jaguar uses the same center-negative PSU as Famicom, Super Famicom, Megadrive 1/Genesis 1, Neo Geo AES, etc. None of those would have damaged it and most would work (some AES=5v but most will work).