Ricoh B132 Service Manual page 885

No. Component
S46 Double-Feed Detection
Sensor
S47 Guide Plate Position Sensor
S48 Relay Sensor
S49 Registration Sensor
S50 Paper Exit Sensor
S51 Bypass Paper Sensor
S52 Bypass Paper End Sensor
S53 Bypass Paper Size Sensor
S54 Paper Exit Relay Sensor
S55 Copy Tray Full Sensor
(Option)
S56 TD Sensor - M
S57 TD Sensor - K
S58 Temperature/Humidity
Sensor - PCU K
S59 TD Sensor - Y
S60 TD Sensor - C
S61 ITB Position Sensor 2
S62 ITB Position Sensor 1
S63 Potential Sensor - K
S64 Potential Sensor - M
S65 Potential Sensor - C
SM
Function
Receives the light emitted from the double– feed
detection LED and reflected from the surface of
each sheet in the paper path. Signals an error if the
thickness of the paper is not the same as the
previous sheet.
Detects jams at the top of the vertical paper path.
Detects the leading edge of the paper and switches
off the registration motor and stops the registration
roller briefly but long enough to correct buckle the
paper.
Detects the leading and trailing edge of each sheet
at the paper exit slot to check timing and detect
jams.
Detects the presence of paper in the bypass tray.
Signals paper out when the last sheet feeds from
the bypass tray.
Reads the positions of the side fences (manually
adjusted) to detect the width of the paper in the
bypass tray. (Paper length is read with pulse counts
from the registration sensor.)
Detects paper jams at the paper exit if the paper
does not arrive or leave the machine at the
prescribed time.
Detects when the Copy Paper Tray B75 is full and
temporarily pauses printing so the operator can
remove the stack from the tray and continue.
Monitors the amount of toner in the developer/toner
mixture in the development unit of the Magenta
PCU.
Monitors the amount of toner in the developer/toner
mixture in the development unit of the Black PCU.
The temperature and humidity readings of this
sensor are referenced to a lookup table stored in
the ROM to 1) Correct the charge roller voltage 2)
Adjust the operation of the Peltier unit, and 3) Set
the length of time the agitators in the development
unit rotate to mix the toner and developer.
Monitors the amount of toner in the developer/toner
mixture in the development unit of the Yellow PCU.
Monitors the amount of toner in the developer/toner
mixture in the development unit of the Cyan PCU.
Reads the encoder film strip on the front edge of
the ITB and sends the sub scan scale signal to the
CPU.
Reads the encoder film strip on the front edge of
the ITB and sends the main scan scale signal to the
CPU.
Reads the potential sensor pattern from the surface
of the drum in the black PCU.
Reads the potential sensor pattern from the surface
of the drum in the magenta PCU.
Reads the potential sensor pattern from the surface
of the drum in the cyan PCU.
7-27
SPECIFICATIONS
B132/B200