My TRS-80 Model 1. Replacing video RAM chip, adjusting voltages and testing.

This is my TRS-80 Model 1. There are many like it but this one is mine.
Replacing a video RAM chip, adjusting the voltages and testing.
XRX Cassette Mod: http://www.trs-80.org/xrx-modification/
TRS-80 Technical Manual: http://www.1000bit.it/support/manuali/trs/TRS-80%20Technical%20Manual%20%281978%29%28Radio%20Shack%29%28pdf%29.pdf
TRS-80 Techincal Reference Handbook: https://www.heinpragt.com/techniek/algemeen/files/Radio%20Shack%20TRS-80%20Micro%20Computer%20Technical%20Reference%20Handbook%202nd.pdf

Видео My TRS-80 Model 1. Replacing video RAM chip, adjusting voltages and testing. канала Chuck Hutchins