Ricoh A229 - Electrical Component Defects; Sensors

ELECTRICAL COMPONENT DEFECTS
SM 6-29 A229
Trouble-
shooting
6.2 ELECTRICAL COMPONENT DEFECTS
6.2.1 SENSORS
Component
(Symbol)
CN Condition Symptom
Scanner Home
Position (S1)
CN312-7
(SBICU)
Stays On SC121 is displayed.
Stays Off SC120 is displayed.
Original Width
(S2)
CN312-
4.5.6
(SBICU)
Stays On
The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
Stays Off The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
Original
Length-1 (S3)
CN305-7
(SBICU)
Stays On The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
Stays Off The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
Original
Length-2 (S4)
CN314-3
(SBICU)
Stays On The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
Stays Off
The CPU cannot detect the original size
properly. APS and AR/E do not function
correctly.
LD Unit Home
Position (S5)
CN218-8
(IOB)
Stays On SC328 is displayed when the laser beam
pitch is changed.
Stays Off SC327 is displayed when the laser beam
pitch is changed.
CN206-
A12
OpenDrum Potential
Sensor (S6)
(IOB) Shorted
The machine quits auto process control and
enters fixed toner supply mode.
CN211-
B6
Stays On SC390-01 is displayed.Toner Density
(TD) (S7)
(IOB) Stays Off SC390-01 is displayed.
CN206-
B11
Open SC350-03 is displayed after copying.
Image Density
(ID) (S8)
(IOB) Shorted SC350-01 is displayed after copying.
CN211-
B2
Open “Toner End” is displayed even if there is
enough toner in the toner hopper.
Toner End (S9)
(IOB) Shorted “Toner End” is not displayed even if there is
no toner in the toner hopper.
CN268-7 Stays On SC495 is displayed.
Toner
Collection
Motor (S10)
(PFB) Stays Off SC495 is displayed.
CN207-
B2
Stays On SC495 is displayed.
Recycle Toner
(S11)
(IOB) Stays Off SC495 is displayed.