Table of contents

1 Theory of operation

1

Basic operation

2

Sequence of operation

3

Engine control system

4

DC controller

5

Solenoids

6

Clutches

6

Switches

6

Sensors

7

Motors and fans

7

High voltage power supply

10

Low voltage power supply

12

Overcurrent/overvoltage protection

14

Safety

14

Sleep (powersave) mode

14

Power supply voltage detection

14

Low voltage power supply failure

14

Power off condition

15

Fuser control

15

Fuser temperature control circuit

16

Fuser over temperature protection

17

Fuser failure detection

18

Laser/scanner system

19

Image formation system

21

Image formation process

22

Step 1: Pre-exposure

23

Step 2: Primary charging

23

Step 3: Laser-beam exposure

24

Step 4: Development

24

Step 5: Primary transfer

25

Step 6: Secondary transfer

25

Step 7: Separation

26

ENWW

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HP Enterprise 500 manual Table of contents