Hobbyist or repairer · for advanced
Sharp MZ-80K museum-quality restoration, PART 1
About this video
Previous owner modifications turn up as the maker investigates and strips down a 1978 Sharp MZ-80K, noting each change before restoring the motherboard in part 1.
Good to know: Tube and flyback hold a high voltage charge after unplugging. A knocked or cracked tube can implode, so protect your eyes and never lift it by the neck. Mains voltage is inside the set. Part 1 of a series.
Why watch it
The maker's erratum names the chip at 14:20 as a Programmable Interval Timer, the UPD8253C, not a ROM. Part 2 is linked.
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