Feb 05 2025 26 mins 9
Repair of a Keithley 2302 battery simulator with junk bin parts. But it did put up a fight!
Teardown video: https://www.youtube.com/watch?v=5LK8wduZsy0
Forum: https://www.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/
00:00 – Faulty VFD display in a Keithley 2302 Battery Simulator
01:22 – Teardown
03:14 – The Display driver PCB
04:30 – Solder Sucking Sucks
05:26 – The VFD display module, a Newhaven Display VFM162SDAR8
06:50 – Probing Pro Tip
07:28 – Probing the VFD signals on the oscilloscope
09:42 – Searching for a replacement 16×2 VFD display
15:03 – Potential replacement LCD
16:38 – Identical replacement found
17:44 – Lets check the junk bin…
18:33 – Pinout trap for young players
19:25 – First test FAIL, but hold on a second, lets try something…
21:09 – Winner Winner Chicken Dinner
22:12 – WOAH, now it’s not working?
24:09 – Lets try THIS…
