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TRS-80 Color Computer Fuse Replacement

TRS-80 Color Computer Fuse Replacement

Christopher Paige

Christopher Paige and 4 other contributors

Last updated on April 28, 2022

20 - 40 minutes
Difficult

Introduction

Go to step 1

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

What you need

Tools

Show more…

  1. 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.

    Edit

  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.

    Edit

  3. 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.

    Edit

  5. 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.

    Edit

  6. 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.

    Edit

  7. 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.

    Edit

  8. 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.

    Edit

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

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

    Edit

  10. 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.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

3 other people completed this guide.

Author

with 4 other contributors

Christopher Paige

Member since: 01/21/11

549 Reputation

3 Guides authored

Badges: 11

+8 more badges

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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