Electrical Component Defects; Sensors; Paper Feed - Ricoh U-C1 B051 Service Manual

26 July 2002

4.4 ELECTRICAL COMPONENT DEFECTS

4.4.1 SENSORS

Component
(Symbol)
Fusing exit
sensor
(I/O board)
ID sensor
(BICU)
Image transfer
belt mark
(I/O board)
sensor
O/B waste
toner bottle full
(I/O board)
sensor
Oil end sensor
(BICU)
Oil overflow
sensor (BICU)
Original length
sensor 1
(SBU)
Original length
sensor 2
(SBU)
Original width
sensor
(SBU)
Paper end
406 (High
sensor 1
voltage
supply)
Paper end
sensor 2
(I/O board)
Paper exit
sensor (I/O board)

Paper feed

sensor 1
(I/O board)
CN Condition
A paper jam is detected when paper is fed; and
Open the paper jam is cleared when the paper is
324
removed
Shorted A paper jam is detected when paper is not fed.
Open No immediate symptom is seen. (☛ NOTE)
258
• The machine does not respond.
Shorted
• No immediate symptom is seen. (☛ NOTE)
Open SC481 is displayed.
307
SC481 is displayed.
Shorted
Open Bottle full is not detected when the bottle is full.
307
No symptom is seen.
Shorted
Open No immediate symptom is seen.
259
The oil pump turns on to pump oil up when there
Shorted
is enough oil.
259 Open SC571 is displayed.
Shorted SC571 is displayed.
The original size is not correctly detected. Output
Open
images are blurred.
104
The original size is not correctly detected. Output
Shorted
images are blurred.
The original size is not correctly detected. Output
Open
104 images are blurred.
The original size is not correctly detected. Output
Shorted
images are blurred.
The original size is not correctly detected. Output
Open
images are blurred.
104
The original size is not correctly detected. Output
Shorted
images are blurred.
Paper end is not detected when the tray is
Open
empty.
Paper end is detected when the tray is not
Shorted
empty.
Paper end is not detected when the tray is
Open
340 empty.
Paper end is detected when the tray is not
Shorted
empty.
324 Open A paper jam is detected when paper is fed.
Shorted A paper jam is detected when no paper is fed.
A paper jam is detected when paper is fed; and
Open the paper jam is not cleared when the paper is
removed.
324
A paper jam is detected when paper is fed; and
the paper jam is not cleared when the paper is
Shorted
removed. Or, a paper jam is detected before
paper is fed.
4-21
ELECTRICAL COMPONENT DEFECTS
Symptom