Repair & Schematics
ZX Spectrum 128
Power Circuit (ZX Spectrum 128)
1 min
the zx spectrum 128 gets three power rails directly from the external power supply there are no internal power regulators the power brick should supply +5v , +12v and 12v to the system start by checking with a multimeter that the power supply pins output those voltages, and when inserted it into the console, those voltages remain if the voltages drop once connected, check on the console for a short