1. Place the amplifier on a flat surface and remove all 7 fixing screws using a cross-head screw driver. 2 screws on each side and three screws hold the back of the cover and they have cutting washers. Lift the cover up on both sides and place away from the amp.
2. Look at the rear left hand side of the amplifier to the pre-amplifier circuit board, which is what carries the RCA input sockets etc. Remove the small plug-in PCB called PHONO BYPASS LINK, by wiggling it from side to side and lifting it up.
3. Line-up the Sequel Phono pre-amp PCB with the (5) pins you removed the Link PCB from on the left and (4) empty ones on the right. When you are satisfied they line up correctly press the Sequel PCB down hard until it locks into place. Refit the cover and fixing screws. When power-up, the amplifier will display Phono, when selected to the first input.