Side Misregistration Failure Detection; Duplexer Jam Detection; Fuser Output Stay Jam 2; Figure 1-64 Duplexer Jam Detection Sensors - HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung

Side misregistration failure detection

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
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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.
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An NVRAM data abnormality or communication error occurs when the product is turned on, when
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the duplexer is installed to the product or when the light intensity is adjusted and write/read the
NVRAM data during duplex printing.

Duplexer jam detection

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)
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Duplex re-pickup sensor (SR2)
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Figure 1-64

Fuser output stay jam 2

The fuser output sensor does not detect the trailing edge of paper within a specified period from when
it detects the leading edge.
82 Chapter 1 Theory of operation
Duplexer jam detection sensors
SR1
Simplex paper path
Duplex paper path
Duplex reverse sensor
SR2
Duplex re-pickup sensor
ENWW