doorsfan
As I understand your video "upgrade" allows to invert colors too?
I'm not technical guy, and I don't understand your explanation, but I'll try to translate
Video output modification:
1. Connect +12V to the pin 1 through 300 Ohm resistor
2. Connect sound from beeper to pin 7 through 10K Ohm resistor
3. Remove 3 electrolytic capacitors at the border of motherboard, near TV jack
4. Solder 555ЛЕ1 above ДД62 (555ЛЛ1) with the next connections: pins 3, 6, 7, 8, 14 should be connected to ЛЛ1; pins 2, 5, 9 should be flexed to connect them with pins related to 3,6,8 (right?). Pins 11,12,13 - are not use, can be just flexed outside. Pins 1,4,10 should be flexed outside too and connected to "minus" positions of removed capacitors С54, С53, С55.
DIN7 to SCART connection:
1 - to 8 and to 16 though 390 Ohm resistor
2 - 20
3 - 7
4 - 11
5 -15
6 - 4 (optional to 5, 9, 13)
7 - 2,6
PC-01 Lviv schema is here:
http://www.lvovpc.cu.cc/files/lvov_sheet.rar