WANTED: IBM PC-Jr schematics for power supply, 5.25" FD

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Article #2678

#2678

From: John N. Schmidt
Date: Wed, 08 Apr 1992 07:37

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I was recently given a PC-Jr which has an intermittent fault keeping it
from cold-booting or going through the Power-On-Self-Test *if* the 360K
5.25" floppy disk was connected to the power supply (through a black
4-conductor wire).  I am seeking a schematic of the PC-Jr in order to
determine expected voltages at the various test points, etc.  

Does anyone have such a schematic, or can point a source out to me?  Any
relevant costs, if known, would also be enlightening.  Replies via
E-mail or the Newsgroup are welcomed either way.  Thanks in advance! 
-- 
John N Schmidt KD4EAI, Lab Director | 615-898-5561 M-F 1300-2230Z <7-4:30>
Middle Tennessee State University   | 615-898-5538 or 896-2871 FAX 24H 
1500 Greenland Drive, PO Box 135    | ggjns@mtsu.edu <Internet Address>  
Murfreesboro, TN  37132-0135 USA    | MTSU Center for Remote Sensing/GIS

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!mjbtn!knuth!knuth!ggjns
From: ggjns@knuth.mtsu.edu (John N. Schmidt)
Subject: WANTED: IBM PC-Jr schematics for power supply, 5.25" FD
Message-ID: <ggjns.702718679@knuth>
Summary: Schematic(s) needed, or a source for them (and costs?)
Organization: Dept. of CS, Middle TN State Univ, Murfreesboro, TN
Distribution: na
Date: Wed, 8 Apr 1992 07:37:59 GMT
Lines: 14