Jinks Posted January 2, 2015 Share Posted January 2, 2015 Ok so I got my u1mb and side 2 today. So I installed this in my 600xl. I folled some directions online as there is no directions for this machine. I soldered up halt ph12 rw and reset to the atari then soldered to the u1mb and plugged in the jumper harnesses. As there is no room to install this on a rf 600xl i cut the top tin piece out some to gain a bit of room and managed to cram it in the rhs cornor and get the keyboard on. Problem is now the red power light doent come on and nothing happens..Any ideas? The power circut should be the same and unchanged with this installed? I feel like shit as took 4 hours to install(set up, reading various website articles, and then failure) Quote Link to comment Share on other sites More sharing options...
adam242 Posted January 2, 2015 Share Posted January 2, 2015 Did you test before you reassembled everything? Case open, board connected, but nothing "crammed together"? No power LED says short circuit somewhere... perhaps something's touching the RF shielding that shouldn't be. The shielding could be eliminated entirely, if need be. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 2, 2015 Author Share Posted January 2, 2015 Shielding is off. Took apart reflowed a couple solder joints still no power..ya think the u1mb has nothing to do with the power circut..?? Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 I was careful to not have metal touching. I cut my shield over the u1mb board to gain some room. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Maybe I can do some power checks with a multimeter and see whats going on. Quote Link to comment Share on other sites More sharing options...
atari8warez Posted January 3, 2015 Share Posted January 3, 2015 This is how I installed my U1MB in my 600XL. Used a piece of plastic on top of the battery, so that it won't touch any metal parts under the keyboard. I also did not install the shield back rather than cutting a piece out of it. The shield doesn't really make any difference, at least it doesn't in my setup. Now you should remove the upgrade and put the original chips back to test the machine to see if it works. I just hope you haven't shorted anything. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 I guess I will put the original chips back in like you said and give that a try. I thought the shield keeps the keyboard more secure as well and also secures the main board as well. but i will keep it off now Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 The ribbon on the OS socket goes upward right? Just double checking to make sure everything is right. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Can it be powered on with the keyboard off? I know obviously the led would not be able to verify but as least could see it on the screen. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Ok it works with original chips in. At first it didnt then flipped the channel switch and it works!! So I thought thats how dumb I was so plugged the u1mb back in and nothing. No power light nothing on the screen.. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 What can I check on the U1mb to verify a no power? Very happy my 600 is not a doorstop. I am thankfull for your help! I got this as a christmas present as came today in the mail so was excited to get up and running... I am hopefull on figuring it out. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 One thought I have is one out of every 50 or so times the orignal OS wont start just sits and buzzes. I heard someone else had a problem like that as the u1mb probably takes more power to fire up and maybe my amperage is low? Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted January 3, 2015 Share Posted January 3, 2015 Something's shorted. Triple and quadruple check all the hook-up points for the four jumper wires. I don't doubt your installation work, but I've done dumb things like solder wires to the wrong via myself in the past and sat tearing my hair out for hours, unable to spot my mistake. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Shorted on which end? I had the u1mb with my halt r/w reset etc wires hooked up when the original os chips were installed and it worked. The only other hookups are the ribbons that are in. I resoldered the connectors on the u1mb and the board its wired on top of the board and they are tight. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted January 3, 2015 Share Posted January 3, 2015 I really can't say which end... I'm speculating here because when I've been messing with one of my machines and it suddenly dies, it's usually because I've shorted something. How about this: are the ribbon cable connectors in the sockets the right way up? Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 http://obsolescenceguaranteed.blogspot.ca/2013/12/a-journey-into-atari-xl.html?m=1 I used this guy as a reference for the main board hook up points. The u1mb card I used connector p2 and soldered in ph12, r/w, rst, hlt going from the outside to the centre of the board to what shows as hookup points on the aux connector.. Is all the right? Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 I really can't say which end... I'm speculating here because when I've been messing with one of my machines and it suddenly dies, it's usually because I've shorted something. How about this: are the ribbon cable connectors in the sockets the right way up?I dont know for 100% sure they are the right way..I put the red stripes on pin 1 on the u1mb board 20 pin on atari down and 28 pin up? Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted January 3, 2015 Share Posted January 3, 2015 Nice photos in that article - I took the photo of the machine with the SIO2SD in it while I was building it. As for orientation: use the picture of the 800XL with the SIO2SD in the top right corner as a reference. You can see the orientation at both ends of both cables by following the red stripe. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 I gots my red stripe on the rhs of the 20 pin he shows left... the way the connector is I didnt think it could go the other way as its a 90deg hitting the cart connector.. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Ok now have a yellow screen. but my keyboards not connected?? edit connected keyboard still a yellow screen. But red led on keyboard comes on and when I press reset I can see the screen flicker. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 Do I need resistors on the ribbon cables as well? Maybe that is screwing it up? Edit probably not as I likely have a newer board and I think from the threads you dont need them.. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 In the other pictue on the article thatv20 pin connector goes down but cant see where the red ribbon is. I put mine up now to match the 800xl and now at least it powers up( to a light yellow screen tho..) Edit. maybe cause I am using a plasma the scanlines for the u1mb screen are not compatable for this display. I can hear noises when I move the joystick like when I press the fire button etc.. Quote Link to comment Share on other sites More sharing options...
Jinks Posted January 3, 2015 Author Share Posted January 3, 2015 A big thank you once again for those willing to help. perhaps it may come as a help thread for someone else experiencing problems on install. Yeah I know 4 wires 8 solder connections 4 on the atari board that are not really spelled out for a guy and 4 that are labeled on the u1mb board and 4 plugs that can go on 2 different ways each what can go wrong right?? Quote Link to comment Share on other sites More sharing options...
atari8warez Posted January 3, 2015 Share Posted January 3, 2015 (edited) One thought I have is one out of every 50 or so times the orignal OS wont start just sits and buzzes. I heard someone else had a problem like that as the u1mb probably takes more power to fire up and maybe my amperage is low? Did you upgrade your 600XL to 64K?. I believe U1MB requires that the computer has full 64K before it can be installed. If you did upgrade it to 64K your 600XL may change behaviour. Specifically it will now need more time between the ON and OFF states for the 64x4 RAM chips to clear. In other words you need to turn it OFF and wait for a few seconds before you turn it back ON. If you don't you may experience symptoms like you mentioned. Or you can just jump into the self-test mode and press reset to cold-start, you don't have to wait then. I will try to get a few close-up photos of my 600XL installation for you so you can check your connections, although depending on where you've got your installation instructions, your connection points on the mobo may be different from my implementation. Edited January 3, 2015 by atari8warez Quote Link to comment Share on other sites More sharing options...
atari8warez Posted January 3, 2015 Share Posted January 3, 2015 Do I need resistors on the ribbon cables as well? Maybe that is screwing it up? If you bought the U1MB from Lotharek you don't need the resistors in the ribbon cable. Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.