EEVblog 1702 : A Most Interesting REPAIR

A repair of this Tennismatic T1000 remote control was way more interesting than I expected.
https://tennismatic.com/main/page_products_ball_machines_t100_series.html

Forum: https://www.eevblog.com/forum/blog/eevblog-1702-a-most-interesting-repair/

00:00 - Tennismatic 1000 Tennis ball machine remote control
00:53 - Battery snap ohms measurement
01:17 - Battery current measurement
02:29 - It's a row/column thing
02:57 - Teardown
05:20 - Membrane inspection
06:44 - Membrane keypad continuity test
07:25 - Pro Tip: Using multimeter as a shorting lead. Testing the microcontroller.
09:27 - Is it the membrane connector?
10:17 - What would take out the entire keypad?
12:10 - Closer inspection of the contacts
12:44 - Ah Ha! What's this?
13:48 - Inspecting and testing the row membrane connections
15:01 - Conductive silver ink time
16:41 - The culprit identified
18:48 - Let's try some fresh conductive silver paint
21:36 - DAMN IT! Dave goofs.
22:56 - How conductive silver ink/paint works
24:01 - Measurements after curing
26:01 - Winner Winner Chicken Dinner

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#ElectronicsCreators #Repair #Tennis
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https://www.youtube.com/watch?v=BSqKN2AaGqI