NCR Personas M Series, Operator'S Manual

Page: 227 / 278

Cash Acceptor
Cleaning Sensors
NCR Personas M Series 5887 Operator Manual 11-21
Cleaning Sensors
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Routinely, it is important that any build-up of dust and debris be
removed from around the cash acceptor sensors. The sensors are
grouped together across the path of the cash and their function is to
detect the movement of the cash around the module. Dirty sensors
can have an adverse effect on the module’s performance. For this
reason, it is recommended that every time a jam is cleared, the
sensors should be cleaned at the same time.
Additionally, certain error messages, incorrect error reporting or an
increase in the cash rejection rate can indicate that sensor cleaning is
required.
Cleaning Materials
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You must take care not to damage the sensors during cleaning. NCR
recommends that compressed air is used but a soft, thin brush or
cotton-bud could be used to gently clear away any dust or debris.
Refer to NCR publication Consumable Items for Self Service, B006-4992
for ordering details and specification of canned/compressed air.
Caution Do not use abrasive material or cleaning fluid as these may damage
the sensors.
Identifying the Sensors
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There are two types of sensor in the cash acceptor. Both types
comprise an emitter and lens at one end, and a receiver and lens at
the other end. The lenses are the areas that need to be cleaned.
Additionally, some sensors have prisms, the ends of which also
need to be cleaned.
The sensor areas identified in this section each have eight (8)
lenses or eight (8) lenses and prism ends to clean.
Some sensors are located very close together where the space
between the emitter lens and the receiver lens (or prism end) may be
as small as 0.5 cm (0.2 in). In this case it may be difficult to see along
the full row of four lenses or prism ends. The space between other
sensors could be as much as 7.5 cm (3 in.) or more. In this case it
may be difficult to identify exactly where each set of emitter lenses
or receiver lenses is located as belts and wheels also occupy this
space.