Waste Toner Sensor; Messages; Near-Full And Full - Ricoh G157 Service Manual

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Waste Toner Sensor

The waste-toner collection unit has a waste toner sensor. The waste toner sensor
consists of a light emitter on the left side [A] and a light receptor on the right side
[B]. There is an interrupter [C] in front of the light emitter. The interrupter also works
as a feeler. The interrupter interrupts light when the waste toner bottle is not set.
When you set the waste toner bottle in the waste toner collection unit, the waste
toner bottle pushes the interrupter (feeler). The interrupter moves out of the light
path. The light emitted from the light emitter goes through the waste toner bottle. At
this time, the light receptor accepts the light. When the waste toner bottle is nearly
full, waste toner interrupts the light. At this time, the receptor does not accept the
light.

Messages

This machine uses only one sensor (the waste toner sensor) to detect the waste
toner bottle and the quantity of waste toner. But the machine can show different
messages when this sensor is interrupted. The table lists the messages, conditions,
and possible causes.
Message
Near Waste The waste toner sensor is
Toner interrupted after warming up.
Waste Toner The waste toner sensor is already
Full interrupted when the machine starts
to warm up.

Near-Full and Full

When the waste toner bottle becomes almost full, the machine shows the message
"Waste Toner is Almost Full". The machine can make 200 developments after this
message shows. The machine will not print until the waste toner bottle is replaced
after it has made 200 developments.
G157
Condition
6-34
Possible Cause
• The waste toner bottle becomes
nearly full during printing.
• The waste toner bottle is not in
place.
• The waste toner bottle is nearly full
when the machine starts to warm
up.
SM