nuker43

Thanks Stephen you really put time into helping me out and i cant tell you enough how appreciative i am. The jaguar has been running for multiple hours since the fix and everything seems to be in order. I wonder if there was a broken trace somewhere that i just could not find right on the regulator. Anyway thanks again and hopefully if someone else has a similar problem they can find the solution in this thread!

holy hell.. right after i posted my last post i checked the pins on the regulator again and just tried shorting the pins you mentioned should ohm out. system works with power button when i short pins 9 & 10 and the regulator isn't getting as hot. I'm running it right now just to make sure everything is ok. I'm going to consider this a fix unless shorting those pins will do damage to other parts of the system. Thanks again all! if it wasn't for these forums I'd never had gotten this jaguar going!

wow I just want to start by saying thank you so much for your post. It was quite the read being as I am not tech savy when it comes to how components work on a circuit board. I did your tests and when 15 & 16 are shorted I get 4.5v through C150. I also checked the ohms of pins 8,9,10 & 11 and get a reading of 0. I checked 7&8 with R169 and they also get a reading of 0 I set the multimeter to 200 ohms and got a reading of 1.5 across R169.. not sure what that means exactly. The led does come on when I short pins 15&16 so the system probably isn't on if no LED is lit up but I will try to plug it in just to test this. i might go ahead and just replace R169 and see what happens. unfortunately i don't have a oscilloscope and wouldn't know where to begin on how to use one either heh. I really want to learn more about how all these components work together but i put all my time into cisco networking so i never studied it. Thanks again for the post and if anything else comes to mind about this i would be extremely grateful. Thanks to all who posted here!

well still cant figure out whats going on with this jag.. i think im just gonna put a heatsink on the voltage regulator and bridge the pins like i did in the first post... see what happens hopefully nothing blows up

Yeah that's what i thought... im gonna give the board another look through.. will be like 20 times now but maybe ill find that broken trace or something... im completely at a loss might just have to give up on this one.. its just a shame because i can see it work if i just short those pins so i know it works just gotta make it work right

Wow lots of great info.. Thanks for that post... you are correct when i short 15 and 16 the game plays fine but if the power switch is off there is no sound and if the power switch is on there is sound. I Tested R168 and i get 12v going through. I also tested pin 2 and it is reading 0v I tried shorting pin 2 and pin 4 and it still doesn't power on.. i tried pin 2 to pin 5 also and same result. I took the power out and turned the switch in the off position and was able to ohm out pin 2 of u38 and pin 1 of the power switch. The cart slot should be fine if it plays the game when i short 15 and 16 correct? I tried jumping the board also by shorting pin 5 and 6 of the switch and still no go. is it possible that the system could be working with the led not lit up? It lights up when i short 15 and 16 of u38 but shorting pin 2 and 4/5 still doesn't light up the led however i did not have it hooked up to a tv. I was just going by the led being lit up or not.

Ok i replaced this cap and still same result.. i hit the power button and nothing.. however if i bridge the two points of the cap i get power just like pin 15 and 16 of the regulator. doesn't matter if power button is pushed in or not it just stays powered on... and of course the regulator is getting way too hot so i dont know what else to try at this point... totally stumped

ok i think i found it.. it's a .022uf ceramic capacitor right? how common are these can i take a motherboard from another system and swap em?

ok i will try it.. know where i can get a replacement?

c167 is getting 11.61v through and i cant seem to find any broken tracks near that area. The weird part is L129 isn't getting any voltage until i short pin 15 and 16 then it gets 12v

Hey all. I am hoping someone with very good jaguar repair knowledge can help me out here. I replaced U38 and the cap and reg1 on the board however when i hit the power button nothing happens. Here is the weird part that i cant figure out. If i bridge the first 2 pins on the u38 on the bottom left if you look at it from the front of the jaguar as soon as i plug in power the jaguar comes on and plays the game. If i have the power switch on off there is no sound but if i have the power switch down there is sound. I thought if i just left these pins bridged on the U38 i could just use the jaguar as it is but upon closer inspection.. the u38 regulator got way too hot for comfort. Now my question is.. what is going on here? Ive looked for broken traces and cant find any... why would the jaguar work if i bridge these 2 pins but not work otherwise? any help would be appreciated!! thanks! Edit : the pins that i am bridging appear to be 15 and 16 (bootstrap input and a switch emitter) according to this pinout http://console5.com/techwiki/images/9/9d/MC34163-Pinout.png

I am having the same problem. I tried 2 different lens's now and the discs won't spin. I put the original lens back in and the disc spins however the lens is failing. I dont understand?? Anyone know what is going on?