Disassembling and Assembling of Writing Unit KM C4070/C4080 Follow

Parts:

Writing Unit

Procedure:

• Pull and remove the toner bottle.

• Remove the right cover/Up1 and the right cover/Up4. (Refer to G.3.2.4 Right
  cover/Up1, right cover/Up2, right cover/Up3, right cover/Up4, right cover/
  Lw1, right cover/Lw2)

• Remove 8 screws [1] and then remove the toner bottle unit [2].

Note:

Be sure to clean the toner bottle unit when the toner adheres.

• Remove 8 screws [1] and remove the coupling plate/Fr [2] and the coupling plate/Rr [3].

• Remove the screw [1] and remove the toner pan [2].

• Disconnect each connector [1].

Note:

Be sure to fix the removed connectors [1] with the clamp [2].

• Remove each 2 connectors [3] and remove each screw [4] and then remove
  3 pressing metal plates [5] in the arrow-marked direction.
• Remove the writing unit/Y [6], the writing unit/M [7], and the writing unit/C [8].

• Disconnect the connector [1].

Note:
Be sure to fix the removed connectors [1] with the clamp [2].

• Remove 2 connectors [3] and remove the screw [4] and then remove the
  pressing metal plates [5] in the arrow-marked direction.
• Remove the writing unit/K [6].

Note:
If you remove only the writing unit/K [1], be sure to remove the pressing metal plate of the writing unit/C. Hold the writing unit/C [2] to remove the writing unit/K [1].

• Reinstall the preceding parts following the removal steps in reverse.

Note:
If you reinstall the pressing metal plate [1], be sure to place the height adjustment screw [2] on the pressing metal plate [1].

After you replace the writing unit/Y, the writing unit/M, the writing unit/C, conduct the following item.

• Cleaning the dust-proof glass (Refer to F.4.2.1 Cleaning the dust proof glass)
• Writing initial position memory (Skew initial position memory) (Refer to Skew Initial Position Memory (Printer Adjustment -Writing Initial Pos. Memory)
• I/O Check Mode (LD1 to LD4 alarm data clear, LD alarm measurement) (Refer to I/O Check Mode)
• Gamma automatic adjustment (Refer to I.4.4.6 Gamma Automatic Adjustment (Drum Peculiarity Adj.)
• Color registration automatic adjustment (Refer to Color Registration Auto.Adj. (Printer Adjustment)
• Manual adjustment of color registration (Refer to Color Regist. Gap Masurement (Printer Adjustment)
• Beam pitch adjustment (Refer to Beam Pitch Adjustment (Printer Adjustment)

After you replace the writing unit/K, conduct the following item.

• Cleaning the dust-proof glass (Refer to Cleaning the dust proof glass)
• Writing initial position memory (Refer to Skew Initial Position Memory (Printer Adjustment - Writing Initial Pos. Memory)
• I/O Check Mode (LD1 to LD4 alarm data clear, LD alarm measurement) (Refer to I/O Check Mode)
• CD-Mag. skew adjustment (Refer to Crosswise Dir. Skew Adj. (Printer Adjustment)
• Restart timing adjustment (Refer to Restart Timing Adjustment (Printer Adjustment)
• Gamma automatic adjustment (Refer to Gamma Automatic Adjustment (Drum Peculiarity Adj.)
• Color registration automatic adjustment (Refer to Color Registration Auto.Adj. (Printer Adjustment)
• Manual adjustment of color registration (Refer to Color Regist. Gap Masurement (Printer Adjustment)
• Beam pitch adjustment (Refer to Beam Pitch Adjustment (Printer Adjustment)