TRS-80 Color Computer Fuse Replacement - iFixit Repair Guide

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Jul 31, 2013 - 04:42:46

Jan 28, 2014 - 02:39:07 Jul 31, 2013 - 04:42:46 Mar 17, 2011 - 12:48:38 Mar 17, 2011 - 12:48:18 Feb 28, 2011 - 12:43:02 Feb 22, 2011 - 11:31:25 Feb 21, 2011 - 05:56:42 Feb 21, 2011 - 05:43:40 Feb 21, 2011 - 05:43:39 Feb 07, 2011 - 11:26:20 Feb 07, 2011 - 11:24:20 Feb 07, 2011 - 11:24:18 Feb 07, 2011 - 11:19:52 Feb 07, 2011 - 11:19:51 Feb 07, 2011 - 11:18:00 Feb 07, 2011 - 11:17:59 Feb 07, 2011 - 11:15:01

Introduction

Replace a broken fuse on the TRS-80 Color Computer's power supply.

What you need

Step 1 Outside Casing

TRS-80 Color Computer Fuse Replacement, Outside Casing: step 1, image 1 of 1

Flip the computer over.
Remove the two 24.1mm Phillips screws near the front of the case.
Remove the five 33.0 mm Phillips screws towards the back of the case.

Step 2

TRS-80 Color Computer Fuse Replacement: step 2, image 1 of 2

TRS-80 Color Computer Fuse Replacement: step 2, image 2 of 2

Carefully flip the computer right side up.
Lift off the top half of the case.

Step 3 Keyboard

TRS-80 Color Computer Fuse Replacement, Keyboard: step 3, image 1 of 2

TRS-80 Color Computer Fuse Replacement, Keyboard: step 3, image 2 of 2

Near the motherboard, gently pull the keyboard ribbon cable until it becomes free.
Lift the keyboard out of the case.

Step 4 Motherboard

TRS-80 Color Computer Fuse Replacement, Motherboard: step 4, image 1 of 3

TRS-80 Color Computer Fuse Replacement, Motherboard: step 4, image 2 of 3

TRS-80 Color Computer Fuse Replacement, Motherboard: step 4, image 3 of 3

Remove the nine 15.24 mm Phillips screws securing the motherboard in place.
When removing the spring door, make sure to keep the door closed.

Step 5

TRS-80 Color Computer Fuse Replacement: step 5, image 1 of 3

TRS-80 Color Computer Fuse Replacement: step 5, image 2 of 3

TRS-80 Color Computer Fuse Replacement: step 5, image 3 of 3

Remove the 5 jumper cables from the motherboard.
Once the jumper cables lift the motherboard up gently; it should lift out easily.

Step 6 Fuse

TRS-80 Color Computer Fuse Replacement, Fuse: step 6, image 1 of 2

TRS-80 Color Computer Fuse Replacement, Fuse: step 6, image 2 of 2

Remove the two 40.6mm Philips screws securing the TRS-80 transformer.

Step 7

TRS-80 Color Computer Fuse Replacement: step 7, image 1 of 3

TRS-80 Color Computer Fuse Replacement: step 7, image 2 of 3

TRS-80 Color Computer Fuse Replacement: step 7, image 3 of 3

Remove the power cable jumpers from the power supply.

Step 8

TRS-80 Color Computer Fuse Replacement: step 8, image 1 of 1

Gently peel back the protective film on the top of the transformer.

Step 9

TRS-80 Color Computer Fuse Replacement: step 9, image 1 of 3

TRS-80 Color Computer Fuse Replacement: step 9, image 2 of 3

TRS-80 Color Computer Fuse Replacement: step 9, image 3 of 3

Locate the two points the fuse is soldered into the circuit board.
Using a soldering iron and soldering wick, desolder and remove the fuse.
Place the new fuse into the location of the old one, and solder it in place.

Author

with 4 other contributors

Christopher Paige

Member since: 01/21/11

549 Reputation

3 Guides authored

Team

Cal Poly, Team 11-24, Maness Winter 2011 Member of Cal Poly, Team 11-24, Maness Winter 2011

CPSU-MANESS-W11S11G24

4 Members

10 Guides authored

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