On Tuesday, May 7, 2002, at 02:22 am, Mike T. wrote:
> Anyone here who has done the VGA (not Hi-Res) modification to a CC > with a > lc575 mobo--has anyone had any luck with adjusting the P1 potentiometer > on > the logic board to wided the viewable area of the screen to the edges? No - it's specifically a mod that the Takky crew strongly advise against, as it ups the voltage through a lot of components that have a finite life and CC a/bs are too precious to risk the P1 tweak IMHO. > I put > in a capacitor like the websites explain, a .01pf ceramic disc cap > rated at > 2000kVDC hoping it would widen it. Before that, after I did the > modification, the screen looked correct, but the screen had a large > border > on the left and right. Putting the cap in helped widen it, but not > enough > and it is curved, meaning that the sides are "cresent shaped" inward > and no > adjustment will help. Since we recommend starting at 1nF (1000pF) - see http://www.stuartbell.dsl.pipex.com/PowerCC/PCC2.html, I'm amazed anything happened. > I also very slightly raised the p1 value at the same > time and at present, the lettering is also somewhat distorted. Should I > further increase the P1 value, or try a better cap. NO! > NOTE: when I went to an > electronics shop for a 1nf cap rated at 1500v, he looked at me weird and > said that they haven't used those since televisions and radios had > vaccum > tubes in them! So is my cap good enough, or should I try to use two of > them > in there :-) ??.....................Mike T. > You should start with 1000pf, and possibly have a 2000pF one ready. They are not stocked widely, but can be sourced. IMHO the first thing to do is to set P1 back to its original value. Stuart -- Compact Macs is sponsored by <http://lowendmac.com/> and... SPECIAL LIST PRICES - Replacement Apple CDROMs from $19.99, MacOS 8.5 CD $79.99 PPC 5400/200Mhz 16/1.6GB/CD/ENET/L2 $119, 5+ for $99 <mailto:[EMAIL PROTECTED]> 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/> 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
