- Solder all wire jumpers.
- Solder all resistors (excluding the voltage setting ones: R8, R11, R15, R18, R19 and R9, R13, R16, R21, R26, R29, R34, R35). Also solder all Zener diodes.
- Solder all capacitors (excluding electrolytic ones), the power switch, the rectifying diode bridge, and all other diodes.
- Solder all transistors, voltage regulators, jumpers, and DIP-switches.
- Solder the LPT connector X1, the adapter connector X2, and the ZIF-socket. This way it would be more convenient to measure the generated voltages, but slightly less convenient to solder and adjust the voltage setting resistors, so this step can be moved after step 7.
- Connect an external 30V power supply, preferably with an overcurrent protection, in place of the secondary winding of the power transformer (XT1 and XT2).
- Turn on the power supply (set the protection current limit at 100mA), and by using the DIP-switches and adjusting the voltage setting resistors set up the required voltages according to the table. The voltages can be measured on the ZIF-socket, or on X2 pins.
- Solder all logic chips.
- Solder the electrolytic capacitors.
- Clean the board.
- Repeated the voltage control.
- Solder the power transformer, fuse, and power cord.
- Make the final board clean-up.
- Control the voltages again.
- Connect the programmer to a computer and check the test signals.