High Power Amp Essentials
www.kitronik.co.uk/2143
Checking Your Amplifier PCB
Carefully check the following before you connect the power:
Audio equipment may become damaged if connected to an incorrectly built amplifier.
Check the bottom of the board to ensure that:
All holes (except the 4 large (3mm) holes in the corners) are filled with the lead of a component.
All these leads are soldered.
Pins next to each other are not soldered together.
Check the top of the board to ensure that:
The speakers, power lead and audio connections are connected to the right place.
The ‘-’ on the capacitors match the same marks on the PCB.
The colour bands on R3 are brown, black, red.
The silver band on D1 is next to the on / off switch.
The ‘Black’ labelled terminal on the ‘POWER’ connection goes to the centre pin on the DC Jack.
The ‘Black’ labelled terminal on the ‘AUDIO’ connection has the black wire connected to it.
The flat edge on the LED matches the outline on the PCB.
