HP 5 C3916A, C2021A, 5n C3952A, 5m C3917A, 4 plus C2037A, 4 C2001A manual Functional Overview

Removing the Transfer Roller	. . . . . . . . . . . .	4-16
Replacing the Transfer Roller	. . . . . . . . . . . .	4-16

5 Functional Overview

Introduction	. . 5-1
DC Controller System	. . 5-2
DC Controller Loads	. . 5-3
Serial Data Communication	. . 5-4
Solenoids	. . 5-5
Photosensors	. . 5-6
Microswitches . . . . . . . . . . . . . . . . . . . . . . 5-8
PC (Tray 2) and LC (Tray 3) Tray Size Sensing
System	. . 5-9
Motors	.	5-10
Paper Jam Detection	.	5-11
Formatter System	.	5-12
I/O Control	.	5-12
Memory Management	.	5-14
Data Processing	.	5-14
PJL Overview	.	5-15
Image Formation System	.	5-16
Photosensitive Drum	.	5-17
Drum Sensitivity	.	5-17
Cleaning Stage	.	5-18
Conditioning Stage	.	5-19
Writing Stage	.	5-20
Developing Stage	.	5-22
Transferring Stage	.	5-24
Fusing Stage	.	5-25
Paper Feed System	.	5-26
Printing from the MP Tray (Tray 1)	.	5-29
Printing from the PC Tray (Tray 2)	.	5-30
Power System	.	5-31
Basic Sequence of Operation	.	5-33
Standard Printer Operation	.	5-33
Timing Diagrams	.	5-34
Warmup Period	.	5-37
Standby Period	.	5-37
PowerSave	.	5-37
Initial Rotation Period	.	5-38
Print Period	.	5-40
Last Rotation Period	.	5-42

Contents-4