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Re: TS1000's (ZX81's) black screen

Posted: Sun Jan 07, 2018 4:00 pm
by PokeMon
Here found 10 pieces for less than 1 GBP including shipment. 8-)

https://www.aliexpress.com/item/MPS2369 ... 56880.html

Re: TS1000's (ZX81's) black screen

Posted: Wed Feb 28, 2018 5:49 am
by dessony
Transistor MPS2369.jpg
Transistor MPS2369
I ordered these certain 5 transistors less than a month ago. Then, I took two NTE123A off the TS1000/ZX81 motherboard. The NTE123A's datasheet did not show any time on or time off. How sad! Anyway, I put these new two MPS2369 on the motherboard. I could read the voltage off the CPU's pin #17 and ULA's pin #16! Lastly, I put four ICs back onto the board and then hooked it up to a monitor and a power supply unit. Finally, I saw a black square with a white "K" within its area on a white screen. It worked fine now! :lol: :lol: The computer's black screen problem is finally SOLVED! :lol:

Cheers,
Dessony

Re: TS1000's (ZX81's) black screen

Posted: Thu Mar 01, 2018 2:58 pm
by 1024MAK
Well done :D

Good to hear that you have got it working 8-)

Mark