Ricoh B234 - Page 773

ELECTRICAL COMPONENT DESCRIPTIONS
SM 6-11 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
Number Name Description
PCBs
operation panel keys.
PCB25 Connector Board Interfaces between the SBU and SIB.
PCB26 Relay Board Interlock switch relay.
Number Name Description
Power Packs
PP1 CGB Power Pack Provides high voltage for the charge corona
wires, grid plate, and the development roller.
PP2 PPG Power Pack Provides high voltage for the corona wires
and grid plate in the pre-charge unit.
PP3 Transfer Power Pack This power pack supplies the charge to the
image transfer roller that pulls the image off
the drum and onto the paper.
Number Name Description
Sensors
S1 1st Paper End Sensor Informs the CPU when tray 1 runs out of
paper.
S2 1st Paper Feed Sensor Controls the 1st paper feed motor on/off
timing and the 1st pick-up solenoid off timing.
S3 1st Tray Lift Sensor Detects the correct paper height for feeding
in the 1st tray.
S4 1st Tray Paper Height 1 Sensor Detects the paper height in the 1st tray
(tandem tray), stage 1.
S5 1st Tray Paper Height 2 Sensor Detects the paper height in the 1st tray
(tandem tray), stage 2.
S6 1st Tray Paper Height 3 Sensor Detects the paper height in the 1st tray
(tandem tray), stage 3.
S7 1st Tray Paper Height 4 Sensor Detects the paper height in the 1st tray
(tandem tray), stage 4.
S8 2nd Paper End Sensor Informs the CPU when tray 2 runs out of
paper.
S9 2nd Paper Feed Sensor Controls the 2nd paper feed motor on/off
timing and the 1st pick-up solenoid off timing.
S10 2nd Tray Lift Sensor Detects the correct paper height for feeding
in the 2nd tray.
S11 3rd Paper End Sensor Informs the CPU when tray 3 runs out of
paper.
S12 3rd Paper Feed Sensor Controls the 3rd paper feed motor on/off
timing and the 1st pick-up solenoid off timing.
S13 3rd Tray Lift Sensor Detects the correct paper height for feeding
in the 3rd tray.
S14 Cleaning Fabric End Sensor Detects when the oil supply/cleaning fabric
has been used up.
S15 Double-Feed Detection LED The paper detection LED and sensor are
used in the new automatic double-feed
detection feature. This LED emits light which
is reflected from the paper to the double–
feed detection sensor to test the translucence
of each sheet.
S16 Double-Feed Detection Sensor
Receives the light emitted from the double–