When printer is turned on, all lights flashing. ERR-993 on dialog box.
SOURCE: I have a Ricoh G7500
990 A Waste Tank Full Sensor Defective
The waste ink tank full sensor (a
photosensor) on the corner of
the waste tank is not operating.
• Waste ink tank sensor on the corner of
the ink waste tank is defective.
• Replace the waste ink tank.
This signal is triggered by the HVPS due to an accumulation of
condensation or ink spillage onto the transport belt.
?? Clean the transport belt.
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