Sharp MX-M260 Operation Manual page 158

Connectors
Caution:
This connector is only intended for service purposes.
Any connection to this terminal may cause malfunctions
of the copy machine.
Instruction for service technician:
The cable length for the service terminal has to be less
than 3 m (10 feet).
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RSPF connector
Finisher connector
USB connector
CLASS 1 LASER PRODUCT
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
CLASS 1
LASER PRODUCT
LASER KLASSE 1
LASER KLASY 1