Ricoh A-P4 User Manual

Both LD unit positions are at fixed distances from the LD unit home position sensor [D].
Usually, the LD unit moves directly to the proper position. However, when the number of times that the
resolution has changed reaches the value of SP2109 05, the LD unit moves to the home position, and this
re-calibrates the LD unit positioning mechanism.
LD Safety Switches
To ensure personal safety and to prevent the laser beam from inadvertently switching on during servicing,
power to the laser diode is switched off when the front cover or upper right cover is opened. Four safety
switches are installed in series on the LD5 V line from the power supply unit (PSU) via the BICU board.
Laser Exposure
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Ricoh A-P4 Specifications

General

Print Method	Direct Thermal
Print Resolution	203 dpi
Maximum Print Width	104 mm
Media Type	Thermal paper
Connectivity	USB
Operating Temperature	5 - 40 °C
Print Technology	Thermal
Media Thickness	0.06 - 0.085 mm
Humidity Range	20 - 80% RH (non-condensing)