Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual page 116

Service Manual
There are four screws securing the ROS unit cover. If you unintentionally remove three of
these screws while removing the engine driver (MCU PWB) board and high voltage unit
from the ROS unit, it is possible for reflected light from the leaser to leak and cause
damage. Therefore, do not remove the four screws, as shown in the following figure.
A CAUTION label is pasted under the engine driver (MCU PWB) board to help you avoid
damage. Be sure to follow the procedure on the label when you open and shut the ROS unit
cover. However, you do not need to open and shut this cover when replacing a defective
Remove the rear cover. (Refer to Section 3.2.1.1.)
1.
2. Remove the top cover. (Refer to Section 3.2.l.2.)
3. Remove theleft cover. (Refer to%?ction 3.2.1.3.)
4. Remove theright cover. (Refer to Section 3.2.l.4.)
5. Remove the ELEC cover. (Refer to Section 3.2.l.5.)
6. Remove the fusing unit. (Refer to Section 3.2.5.l.)
7. Disconnect all comectors from the engine driver (MCU PWB) board.
8. Remove 2 CB screws (M3 x 6) securing the MCU box, and remove the MCU box and the
engine driver (MCU PWB) board.
9. Remove the high vokageu nit. (Refer to Section 3.2.2.4.)
10. Remove thelink assembly. (Refer to Section 3.2.4.l.)
11. Remove theearth plate. (Refer to Section 3.2.2.6.)
12. Remove the front cover. (Refer to Section 3.2.4.5.)
13. Remove the drive unit. (Refer to Section 3.2.6.1.)
14. Remove the CRUSENSORPWB board. (Refer to Section 3.2.6.2.)
15. Remove the REGI roller. (Refer to Section 3.2.4.2.)
16. Remove thelower chute assembly. (Refer to Section 3.2.4.3.)
17. Remove theerase lamp. (Refer to Section 3.2.6.3.)
18. Remove 6 CBB screws (M4 x 10) securing the ROS unit, and remove it.
Rev. A
Screws
Figure 3-49. Screw Positions
Disassembly and Assembly
3-31