3-55
Confidential
9.12.10First Side Document Scanning Position Sensor PCB ASSY, Second 
Side Document Scanning Position Sensor PCB ASSY (Duplex scanning 
models only), ADF Cover/Document Detection Sensor PCB ASSY 
(1) Remove the first side document scanning position sensor PCB ASSY while pushing the 
rib A. Disconnect the first side document scanning position sensor PCB harness (WH) 
from the first side document scanning position sensor PCB ASSY.
(2) Peel the film. Remove the second side document scanning position sensor PCB ASSY 
while pushing the rib B. Disconnect the second side document scanning position sensor 
PCB harness (BL) from the second side document scanning position sensor PCB ASSY. 
(Duplex scanning models only)
(3) Remove the ADF cover/document detection sensor PCB ASSY while pushing the rib C. 
Disconnect the ADF cover/document detection sensor PCB harness from the ADF 
cover/document detection sensor PCB ASSY.
Fig. 3-50
Harness routing: Refer to “8. ADF unit”.
ADF cover/document detection 
sensor PCB harness (WH)
Rib C
ADF cover/document 
detection sensor PCB ASSY
First side document scanning 
position sensor PCB harness (WH)
First side document scanning 
position sensor PCB ASSY
Second side document scanning 
position sensor PCB harness (BL)*
Film
Rib A
Rib B*
Second side document 
scanning position sensor 
PCB ASSY*
* Duplex scanning models only.