[EMAIL PROTECTED] (J.S.�Garrison) on Sat, Aug 3, 2002, 7:53am (EDT-3) wrote:
=== The best width adjustment takes the screen outside the edges of the viewable area. If you can't adjust to that, then the power supply may be weak. Adding a fan to that may signal it's untimely death. Using a voltmeter, place the two leads into the mouse port top right and top second-to-right. You MUST read between 4.8 and 5.5V. If not, DON'T add a fan. Run it backless if needed. But keep a fan or any other current-drawing device out of the Plus until you can do a Pina repair, (Mac Upgrade Secrets), replacing bad capacitors and diodes. Jeff --- Since I had the mother board out and the Radius boards installed, I decided to risk starting it with the fan and Radius stuff in place so I finished the installation and hit the switch. The screen displayed a nice checkerboard. I checked the voltage as per the Radius instructions, at the blue wire on the power cable. They said it should be 4.85 - 4.95 volts. I got 5.8 volts. I turned the voltage down all of the way and got about 4.9 volts. I re-started. The Radius ROMs displayed the logo on the start up screen and it booted fine from a floppy. The image width is now even smaller and for some reason, it won't boot from a SyQuest drive with either Sys 6 or 7.1. It seems to run out of memory or something, even with the Radius software installed. I may try Compact Virtual and see if that helps. Yeah, I'm going to have to bite the bullet and get Mr. Pina's books. Then, [EMAIL PROTECTED] (mart) on Sat, Aug 3, 2002, 4:48pm (EDT+6) wrote: === The width control is actually an adjustable coil. If youy say 'to the limit', I guess the adjustable core is way out of the coil, on direction. Try the other direction. Just a wild guess, though. --- Actually it's all of the way in. adjusting it outward makes the screen even smaller. === Ah, that seems to be my cue, since Philip provided me with all the Compact schematics. According to them, the power connector has 11 pins in a row. Pin 10 on the connector provides + 12V (red). Pin 9 can be used as ground (black). Better double check with tast voltmeter. --- That validated my voltmeter findings and made me really comfortable about taping the power cable at those points. Thanks. ;) I had a spare cable that I modified into a harness for the Radius board and fan. Thanks also for the connector layout sent offlist. I had written: After turning down the brightness pot, I got a clear screen by turning the focus control up to it's limit. [EMAIL PROTECTED] (the�pickle) on Sat, Aug 3, 2002, 11:45am, then wrote: === Sounds like your flyback is on its last legs. The problem is, the width control is at it's limit as well and the image size is by necessity, small. The height can be adjusted all of the way to the edge of the screen. You shouldn't do that anyway - factory specs are for about a 0.5" border all the way around to keep the 72 dpi resolution, and Pina specifically mentions that overadjusting the analogue board beyond that will lead to premature component failure. --- Yeah, I only mentioned that I could do that to illustrate the point that the height control had lots of leeway while the width control couldn't even be adjusted to specs.. Right now I have the height adjusted proportionally to the width. It's currently a really small screen. I wouldn't mind replacing one or two capacitors, if that's the problem but when you consider that you can still get a good working Plus for $1 to $5 (free if you live in a city) with a keyboard and mouse, Replacing all of the capacitors and/or the flyback would be an unjustifiable expense. Thanks again to all who helped with this. I'm sure the Pina books will get me the rest of the way. The important thing is that the Radius accelerator seem to work, even with some home-made cobbling together. Best, Hardy -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
