EPSON AcuLaser C1900/AcuLaser C900 Revision B
Disassembly and Assembly Extension Unit Disassembly and Assembly 205
4.6.2  500-sheet Cassette Unit Control Board (PWB-A)
1. Disconnect the connector and take out the 500-sheet Cassette Unit Control Board 
Assy.
(3 screws) (See 
“Figure 4-62 (p.205)”) 
2. Remove the cover. (1 screw)
(See 
“Figure 4-63 (p.205)”) 
3. Remove the 500-sheet Cassette Unit Control Board. (2 screws)
Figure 4-62. Removing the 500-sheet Cassette Unit Control Board Assy
Figure 4-63. Removing the 500-sheet Cassette Unit Control Board