Lexmark MX912dxe - Main Power Supply Removal; Printhead Removal

Main power supply removal
CAUTION—SHOCK HAZARD: The main power supply capacitors may have residual voltage. Do not touch the
parts under the insulated area. The printer must be turned off for four hours to dissipate the charge.
CAUTION—FIRE HAZARD: To prevent fire, do not replace fuse with the incorrect type and rating.
1 Remove the left cover. See “Left cover removal” on page 272.
2 Remove the rear left cover. See “Rear left cover removal” on page 273.
3 Remove the main power supply shield. See “Main power supply shield removal” on page 273.
4 Remove the main power supply fan. See “Main power supply fan removal” on page 274.
5 Disconnect all cables from the power supply, remove the five screws (A), and then remove the power supply.
Printhead removal
1 Remove the top front door. See “Top front door removal” on page 327.
2 Remove the bottom front door. See “Bottom front door removal” on page 327.
3 Remove the front inner cover. See “Front inner cover removal” on page 328.
4 Remove the waste toner door mount. See “Waste toner door mount removal” on page 328.
5 Remove the left cover. See “Left cover removal” on page 272.
6 Remove the rear left cover. See “Rear left cover removal” on page 273.
7 Remove the main power supply shield. See “Main power supply shield removal” on page 273.
8 Remove the main power supply fan. See “Main power supply fan removal” on page 274.
9 Remove the main power supply. See “Main power supply removal” on page 275.
10 Remove the printhead relay board. See “Printhead relay board removal” on page 276.
7421
Repair information
275