This item is a programmed PIC microprocessor for MK4 GHD PCBs. This is compatible with 4.0B, 4.1B, 4.2 Type 1 and 4.2 Type 2 models.

The PIC processor is the 2nd most common component failure on mk4 GHD PCBs (the most common being the R8 or R11 resistor).

We only suggest you attempt to replace the processor if you have the soldering equipment and experience necessary. If you are not confident then we would recommend replacing the PCB as a complete unit.

Please note, this PIC processor will only work the (older) revisions of PCB that have a round buzzer.

If you have a square buzzer, then you need the PIC for the square piezo PCB version which is available HERE