XM301 defectsFrom: ac849
Date: 07/30/89-09:21:35 AM Z
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From: ac849 Subject: XM301 defects Date: Sun Jul 30 09:21:35 1989 In an article on page 95 of the April (No. 53) Analog he state of a defect in the XM301 which interfers withdisk drive data transfers. I have this problem and the article mentions that by installing some resistors the problem can be cured. Does anyone know what resistors and where to install them. Thanks, Frank Carotenuto ac849 ** Answered by JOHN SUCHY (aa271) on Mon Jun 15 02:59:26 1987 ** Thanks for answering your own question for me off line, Frank. For the rest of you, here it is: 1. Buy 3 resistors: all 470 ohm/ 1/4 watt (if you don't know what that is, don't try this!). 2. Open XM301 case--THIS VOIDS YOUR WARRANTY! 3. Where the SIO cable meets the PC board, label and de- solder wires 3, 9, and 13. 4. Solder the resistors (one end only) into the 3 new holes. 5. Solder the wires onto the other end of the resistors in the matching holes. This procedure buffers the critical data lines from the computer and drives. It should prevent any more interferance with the drives (and maybe the printers, too)! Your Co-sysop John E. Suchy aa271 Thanks for asking and answering!
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