🇷🇺 Нафаня (Nafanya) ZX Spectrum Clone: Part 1 (Power On & Troubleshooting) [TCE #0590]
51I've been interested in getting one of these machines for a while due to their keyboard and БМК (Basic Matrix Crystal, like ULA). It's dated pre-Soviet Union breakup and I think was built in the Russian SFSR, although the БМК probably comes from Belarus SSR.
I initially thought it didn't work ... no video output & no keyboard sound ... but it turns out the RGB video pinout in the manual differs from reality, perhaps the original owner modified it.
So I did get video to work ... maybe cleaning up the wires & connections will get a better image. The keyboard is flaky as well with just one key working if I angle the keyboard "just right", hence why there was no key tap sound.
The БМК (if that's what it is) is the third type I've seen for the Soviet Spectrum - it had one leg that had come away from the pad, which I re-soldered. It also has a beautiful, ceramic Z80 clone from, I believe, East Germany/DDR based on the "80A" and "MME" markings ... never seen a ceramic version before, and interesting choice for a Russian clone ... maybe the T34s were hard to get by 1991 ... ?
Some info here (Russian):
https://speccy.info/Нафаня
00:00 ... Intro
03:00 ... Схема Подключения Компьютера (Computer Connection Diagram)
05:40 ... Кодер (Coder) box
08:00 ... Opening the computer
11:38 ... БМК leg re-soldering
14:20 ... Power input
14:55 ... Initial power on - NOK
16:30 ... Suspect RGB video wiring
17:55 ... Checking video signals on oscilloscope - OK
21:15 ... We have video!
23:00 ... Brett thinks something
24:00 ... We have slightly better video!
26:10 ... Channel thanks & outro
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