Sinclair ZX80 / ZX81 / Z88 Forums

Hi guys, I need your help! I bought faulty Zx+, issue 6A with many problems, the voltages on the board were not correct, I did a recap, I changed TR5-defective, zenner diode-defective, changed 7805 with Traco, I also found 7 out of 8 TMS4352 defective I replaced with: KM4164 (which were double teste...