+Larry Posted December 4, 2016 Share Posted December 4, 2016 Aside from the well known issues with the SIO traces, what other common failure points exist? I've got a couple of bad boards that I'm planning to work on this winter. -Larry Quote Link to comment Share on other sites More sharing options...
TXG/MNX Posted December 4, 2016 Share Posted December 4, 2016 Better spend sometime to resolder points then next measure all traces. I think bad soldering is the most common error. I had a few xf551 drives that didn't work new out of the box. These had a bad rom. There are drives with an 8040 controller that use the eprom 2764 but the version with the 8050 have the rom indide the 8050 chip. This rom was bad on all drives. So to fix it you can check a jumper on the left of the 8050 (looking from the sio ports) this jumper allows you to disable the rom inside the 8050 and let it work like a 8040 then you need to add the eprom. This did fix all those drives seems a complete batch was faulty. 1 Quote Link to comment Share on other sites More sharing options...
1050 Posted December 4, 2016 Share Posted December 4, 2016 Anything that moves leads to trouble on the factory board. Power switch and power plug of note IIRC. Root cause of SIO problems is because the jacks are not pinned down to the board properly and they move around fatiguing the solder joints eventually. Same issue but not as common with power jack and power switch. JB Weld for last two, upgraded rivets or little bolts/nuts for SIO jacks and THEN do the final episode of solder repairs. 1 Quote Link to comment Share on other sites More sharing options...
Mathy Posted December 4, 2016 Share Posted December 4, 2016 Hello Larry If you're gonna fix stuff, you might want to find a replacement for the power plug/connector on the XF's mainboard. It's easy to short the power supply if you aren't careful when plugging it into the drives power connector. With a different connector on the PCB, this can probably be cured. Sincerely Mathy Quote Link to comment Share on other sites More sharing options...
+Larry Posted December 5, 2016 Author Share Posted December 5, 2016 Hello Larry If you're gonna fix stuff, you might want to find a replacement for the power plug/connector on the XF's mainboard. It's easy to short the power supply if you aren't careful when plugging it into the drives power connector. With a different connector on the PCB, this can probably be cured. Sincerely Mathy Hi Mathy- Isn't it the same as a 1050 or others? I've just never heard of a connection issue. Can you provide any more detail? Larry Quote Link to comment Share on other sites More sharing options...
Mathy Posted December 5, 2016 Share Posted December 5, 2016 Hello Larry I've managed to capture both connectors in one picture. As you can see, the connector on the 1050 prevents you from pushing the plug in in any other way than the right one. The one from the XF551 is open at the top. I've blown a fuse because of that. Sincerely Mathy 1 Quote Link to comment Share on other sites More sharing options...
Mathy Posted December 5, 2016 Share Posted December 5, 2016 Hello Larry "FloppyDoc" did this to his 1050. It makes the 1050 run cooler. The same will work for the XF551. Sincerely Mathy 4 Quote Link to comment Share on other sites More sharing options...
+Larry Posted December 6, 2016 Author Share Posted December 6, 2016 Thanks for posting that, Mathy. I remember you talking about alternative voltage regulators before, but never saw the article/background. And, I'll take a good look at the XF power jack. -Larry 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.