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Radio Shack TRS-80 Model 1 Repair

September 26th, 2014 Leave a comment Go to comments

Radio Shack TRS-80 Model 1 Repair.

This is the second time that this computer was repaired within 2 years.

Defect:

  • Video Sync issues (Horizontal Driver) and then … garbage on the screen.

Replaced parts:

  • Replaced 1 x CD4069 HEX Inverter (Z6)
  • Replaced 1 x MM2102 RAM (Z62)
Categories: Projects / Repairs, Today, Various
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