Electrical Component Defects; Sensors - Ricoh A284 Service Manual

ELECTRICAL COMPONENT DEFECTS

7.2 ELECTRICAL COMPONENT DEFECTS

7.2.1 SENSORS

Component
(Symbol)
Scanner Home
Position (S1)
Platen Cover (S2)
Original Width
(S3)
Original Length-1
(S4)
Original Length-2
(S5)
LD Unit Home
Position (S6)
Toner Density
(TD) (S7)
Paper Exit (S8)
Registration (S9)
Image Density
(ID) (S10)
Upper Paper
Height (S11)
Lower Paper
Height (S12)
A283/A284
CN Condition
Open
505-5
(SIB)
Shorted
Open
505-8
(SIB)
Shorted
Open
501-A3, 4
(SIB)
Shorted
Open
501-A8, 9
(SIB)
Shorted
Open
501-A13
(SIB)
Shorted
Open
220-2
(IOB)
Shorted
Open
204-3
(IOB)
Shorted
Open
203-B2
(IOB)
Shorted
Open
207-B2
(IOB)
Shorted
Open
219-5
(IOB)
Shorted
Open
235-2
(PFB)
Shorted
Open
236-2
(PFB)
Shorted
7-24
Symptom
SC121 is displayed.
SC120 is displayed.
APS and ARE do not function properly.
No symptom.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
SC328 is displayed when the laser beam
pitch is changed.
SC327 is displayed when the laser beam
pitch is changed.
The add toner indicator blinks even if
there is toner in the development unit.
SC390-01 is displayed.
The Paper Jam indicator will light
whenever a copy is made.
The Paper Jam indicator lights even if
there is no paper.
The Paper Jam indicator lights even if
there is no paper.
The Paper Jam indicator will light
whenever a copy is made.
SC350-03 is displayed after copying.
SC350-01 is displayed after copying.
Add Paper is displayed even if there is
paper. If this condition occurred four
times, SC501-02 will be displayed.
SC501-01 is displayed.
Add Paper is displayed even if there is
paper. If this condition occurred four
times, SC502-02 will be displayed.
SC502-01 is displayed.
SM