Lexmark 11A4006 - Optra K 1220 B/W Laser Printer Service Manual page 89

5. Remove five screws to remove the interconnect board.
6. Remove three screws to remove the high voltage power supply
board.
Installation Notes:
1. When you install the interconnect board, observe the order of
fastening screws as shown above.
2. When you install the high voltage power supply/interconnect
board assembly, be careful the cable does not overlap the four
spring electrodes on the bottom left of the printer mechanism.
3. As you install the HVPS/interconnect board assembly, be sure
the interconnect board connects into the power supply board.
Be sure to match the four screw positions.
Repair Information 4-13