Инструкции По Обслуживанию для HP laserjet 3390, 3392 all-in-one

ADF paper path and ADF sensors

The following diagram shows the ADF paper path.

PAGE EJECTS FULLY

OUTPUT AREA

ADF glass

Prescan rollers

INPUT

TRA

Form sensor

Postscan
rollers

Pre-pick roller
Picks top sheet

Stack stop

Pick roller

Paper present sensor

ADF door
open flag

Separation pad

Cleanout

Figure 4-3

ADF paper path

The paper-present sensor determines if paper is in the ADF. The form sensor detects the top and bottom
edges of the document. One other sensor detects an open ADF door.

Chapter 4 Theory of operation

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