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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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COMPUTER MAINTENANCE & REPAIR xx COMPUTER xx ELECTRONIC EQUIPMENT MAINTENANCE & REPAIR Notes on bringing up a microcomputer. General information on the process of wiring and checking out a microcomputer-based system. References are to an 8080 based unit. A penny pinching address state analyzer. How to build a 256 by 256 point address state analyzer that displays the dynamic fluctuations of a computer's 16 bit memory address bus. Use it with an oscilloscope to give a visual display of the computer in operation and help troubleshoot movements into unexpected memory areas. Est. cost: $15. Electromagnetic interference. How to determine the source of electronic interference and eliminate or reduce it by simple means. Troubleshooting with electronic signatures. A "free-running" microprocessor can help to fix a malfunctioning computer system. Detect single-bit errors with almost 100% accuracy. Maintenance alternatives for personal computers. Includes preventive maintenance steps to perform. Build a real-time memory-activity display. Watch computer activity on an oscilloscope. Solving power-up problems. How to approach troubleshooting an apparently dead computer. Dealing with conflicts. Getting your computer back up and running when you encounter hardware and/or software conflicts. Build a POST (power-on, self-test) Code diagnostic card that does the job of monitoring and displaying computer-generated test codes. Est. cost: $25. How to keep your micro cool. Ways to prevent problems due to heat build-up in your computer. How to determine if your computer has a "stuck bit" which leads to garbaged data. How to maintain your microcomputer. Includes tips on cleaning, electrical power, static, etc. POST code reader for your PC. Special board displays the power-on self test (POST) 2-digit error codes generated by a computer during the boot process. Est. cost: $40 (kit). Maintaining your own PC. Simple maintenance procedures looks at cleaning, checking cables and connections, internal checks, hard drive checks, etc. Cooling a microcomputer. The use of fans and board spacing can be further aided by construction of the power supply preregulator circuit shown here. Tip on regular replacement of internal 6-volt battery in IBM or IBM-campatible PC AT computers. Cleaning up your act. Tips on proper cleaning and ventilation which can add years to the life of electronic equipment (audio, TV, VCRs, computers, etc.). Troubleshooting and maintenance tips for personal computers. Troubleshooters corner. Tips on troubleshooting the Apple II microcomputer. Troubleshooter's guide. Getting started tackling repair and interfacing problems. Microcomputers and TVI (television interference). How to prevent your home computer from causing TV interference. Computer troubleshooting tips and techniques. Need for a front panel and good documentation is cited. Assembling and using the Mullen Extender Board with built-in logic probe. How to silence a noisy computer. Tips from some of the chip manufacturers on how to eliminate electronic noise ("glitches") in digital circuits. The information is taken from their chip data books. Hardware testing in suspended animation. Build a bus monitoring circuit which will suspend CPU processing whenever a specified 8-bit "word" is detected on the selected eight leads of the system. A troubleshooting aid to find problems in a computer that is functionally "shot". Non-resident MPU board plugs into the resident MPU socket. A "NOP" is continuously available. Change address via dip switch. Use to find shorts. Three tips for easier assembly of S-100 computer cards. (1) Assembly jig. (2) Foam board holds components while soldering. (3) Flexible arm card holder to position board. Kilobaud klassroom. Part 20. (1) EPROM programming. (2) Troubleshooting a defective computer system. "Electrocardiogram" for your computer. Circuit sounds an alarm if a computer system fails. Useful in real time control applications. Become a computer troubleshooter in 34 easy lessons. Review of the National Technical School home study courses. Silence your computer's fan. How to reduce the noise caused by vibration, high speed, etc. Preventive maintenance advice for small computers. Tips on environment, cleaning, etc. Build the Bitgrabber, a gadget that supplies a low pulse whenever any preselected ASCII code is detected. Useful for troubleshooting computer output ports. POST code reader. Build a device to read the POST (power-on self-test) codes generated by a personal computer. This will facilitate troubleshooting many hardware problems. A survival guide for PC owners. Get a handle on PC troubleshooting and get the most from PC technical support with these helpful tips. 10 tips for home computer care and repair. Fixing memory problems, cleaning disc drives and cassette recorders, avoiding electrical problems, etc. Computer care. Tips on routine cleaning, preventative maintentance, and minor troubleshooting for personal computers. Troubleshooting an IBM XT clone motherboard with a defective PROM for addressing 640K of memory. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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