EPSON AcuLaser C1100 Revision B
DISASSEMBLY AND ASSEMBLY MSI 305
REINSTALLATION
1. Gently insert HARNESS-ASSY P/H 1 along the left side of MSI ASSY together 
with MSI ASSY from the front of the main unit.
2. Insert MSI ASSY about halfway with the front of MSI ASSY lifted slightly to 
avoid TIE PLATE under the main unit, and then bring out the connector of 
HARNESS-ASSY P/H 1 from the hole on the main unit.
3. After matching MSI ASSY to the main unit attachment position, gently pull 
HARNESS-ASSY P/H 1 from the outside to take up any slack inside the main 
unit.
4. Fasten MSI ASSY to the main unit with the 6 screws (silver, with flange, tapping, 
8 mm). 
5. Connect connector (P/J408) and connector (P/J409) to PWBA MCU.
6. Fasten the harness of HARNESS-ASSY P/H 1 with the two clamps on CHASSIS 
ESS.
7. Attach FRAME ASSY-PH. (p.327)
8. Attach COVER FRONT L and COVER FRONT ASSY U. (p.292)
9. Attach COVER MSI. (p.291)
10. Attach COVER ASSY LH. (p.295)
11. Attach COVER ASSY RH. (p.301)
1
Figure 4-24.  Reinstallation of MSI ASSY
C A U T I O N
 When performing the following work, take care to prevent the 
cable tie that bundles the harness of HARNESS-ASSY P/H 1 
from being caught on the holes, etc. on the main unit.
 When performing the following work, take care to prevent the 
HARNESS-ASSY P/H 1 from being sandwiched between the 
main unit and MSI ASSY.
Table 4-2.  Symptoms when the connector is loose
Connector 
No.
Panel Indication Symptom
Error Caused by Connector 
Disconnection
P/J408  E Open
Printing is not 
possible.
Paper Feeder Rear Cover is open.
P/J409 Service Req E511
Printing is not 
possible.
Sensor TR0 error
Leg_Sec03_507EB
CAUTION
[2)-1]
[2)-2]
[3)]
[1)]