HP LaserJet 4100 - Page 57

C9148-90909 5 Theory of operation 55
Scan-unit components
Figure 19. Scan-unit components
1
2 3 5
7 6
4
8
91011
1
2 3 5
7 6
4
8
91011
1 intake fan
2 inverter control PCB
3 ADF door-open sensor
(PS10)
4 optical-unit drive-belt
5 optical-unit motor (under the
shield)
6 power supply (under the
shield)
7 control-panel connector
8 scanner controller board
(under the shield)
9 optical-unit assembly
(includes the CCD driver
PCB)
10 scanner lamp
11 optical-unit lock