HP laserjet m712 Fehlerbehebungsanleitung

The duplex controller determines a side misregistration sensor failure and notifies the formatter when it

encounters any one of the following condition:

●

The photoreceiver sensor does not output as prescribed when the product is turned on, when the

duplexer is installed to the product or when the light intensity is adjusted before the paper is fed to

the duplexer.

●

The side registration sensor does not detect the home-position.

●

An NVRAM data abnormality or communication error occurs when the product is turned on, when

the duplexer is installed to the product or when the light intensity is adjusted and write/read the

NVRAM data during duplex printing.

The duplexer uses the following sensors to detect the presence of paper and to check whether the paper

is being fed correctly or has jammed:

●

Duplex reverse sensor (SR1)

●

Duplex re-pickup sensor (SR2)

  Duplexer jam detection sensors

Simplex paper path

Duplex reverse sensor

Duplex re-pickup sensor

Duplex paper path

SR1

SR2

The fuser output sensor does not detect the trailing edge of paper within a specified period from when

it detects the leading edge.

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Chapter 1   Theory of operation

ENWW