I suddenly decided to disassemble my Casio CT-360 last night/morning. Man, such a pain in the as$. Many ribbons, all soldered, so I had to juggle the boards around to get the thing shelled. I couldn't figure out out the keyboard comes out, so I cleaned it all as one piece. Turned out great, thing looks brand-new (almost).
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I got the thing in a free pile and it mostly worked (dirty pots), but it had a broken switch for the "Casio Chord" system. While I was in there, I decided to do something about it. I initially thought the switch was just physically broken, but the chord system didn't seem to work correctly and this is explained now that I've seen the inside. There were just pads on the board that were supposed to line up with the switch-part on the casing - broken.
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I other retro news, I got a "broken" Dallas RTC to work! It was totally operator error. When I acquired the chip, it had all the pins, two up for battery, two up for crystal. I finally noticed how most of my other ones have two more pins folded up. Datasheet says that pin 21 is RTClr, which would explain why it didn't work.
I have another one that might actually be broken, too. It doesn't boot the computer it goes in (Epson AN-4C50, gives video card beeps), it makes another test system go kooky (doesn't know what CPU is present), and of course, gives no sh*t about what time it is. Haven't tried a third system, but I'm pretty sure it's kaput.
Main Loadout (daily drivers):
Intel TE430VX, Pentium Sy022 (133), Cirrus Logic 5440, SB16 CT1740
ECS K7S5A, A-XP1600+, MSI R9550
ASUS M2N-E, A64X2-4600+, PNY GTX670, SB X-Fi Elite Pro
MSI Z690, Intel 12900K, MSI RTX3090, SB AE-7