Скачать или смотреть ITC#81:- Player 2 keypad port failure - Atari 5200

In this hastily shot video, I go through the troubleshooting and repair done on an Atari 5200 that was showing issues with the player 2 controller port. Specifically, the right side most buttons on the keypad were not responding. Going through the troubleshooting steps, I isolate the issue to one specific MUX controller IC chip and replace it out.
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Tools featured in this video:-
B&K Precision 1474 Oscilloscope
Atari 5200 Service Manual
Samsung J3 phone
My rambling mind and words...

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Timestamps:-
00:00 - Intro & Problem Demonstration
02:27 - Service Manual Flowchart - Let's begin at the beginning
03:28 - Using the 1474 looking for some Square Waves (U9 - U12)
06:54 - Hunting for some different Square Waves (U9 - U12)
09:00 - Port 2 flow chart says... Hmm Let's Piggy Back & Test
12:45 - Loop back board testing - It works!
13:53 - What the original error looked like.
15:15 - Repairs done & Final Testing.
17:41 - Summary and Outro

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Intro music :- "Chroma Mirage" by Luis Quintero (Bitonal Landscape) composed exclusively for Ivory Tower Collections.

Video marked as "Not made for kids" due to content is intended for more mature age groups, adults, and those with some basic electronics knowledge and skill.