ELECTRICAL COMPONENT DEFECTS 19 January, 2001
4-16
4.2 ELECTRICAL COMPONENT DEFECTS
4.2.1 SENSORS
Component
(Symbol)
CN Condition Symptom
Scanner Home
Position (S1)
504-5(SIB) Open SC121 is displayed.
Shorted SC120 is displayed.
Platen Cover
(S2)
504-8 (SIB) Open APS and ARE do not function properly.
Shorted No symptom.
Original Width
(S3)
505-3, 4
(SIB)
Open
CPU cannot detect the original size properly.
APS and ARE do not function correctly.
Shorted
Original Length-1
(S4)
505-8,9
(SIB)
Open
CPU cannot detect the original size properly.
APS and ARE do not function correctly.
Shorted
Original Length-2
(S5)
505-13
(SIB)
Open CPU cannot detect the original size properly.
APS and ARE do not function correctly.
Shorted
LD Unit Home
Position (S6)
220-2 (IOB) Open SC328 is displayed when the laser beam pitch
is changed.
Shorted
SC327 is displayed when the laser beam pitch
is changed.
Toner Density
(TD) (S7)
205-5 (IOB) Open
The add toner indicator blinks even if there is
toner in the development unit.
Shorted SC390-01 is displayed.
Paper Exit (S8) 203-B2
(IOB)
Open The Paper Jam indicator will light whenever a
copy is made.
Shorted The Paper Jam indicator lights even if there is
no paper.
Registration (S9) 207-B2
(IOB)
Open The Paper Jam indicator lights even if there is
no paper.
Shorted
The The Paper Jam indicator will light
whenever a copy is made.
Image Density
(ID) (S10)
219-5 (IOB) Open SC350-03 is displayed after copying.
Shorted SC350-01 is displayed after copying.
Upper Paper
Height (S11)
235-2
(PFB)
Open Add Paper is displayed even if there is paper.
If this condition occurred four times, SC501-02
will be displayed.
Shorted SC501-01 is displayed.
Lower Paper
Height (S12)
236-2
(PFB)
Open
Add Paper is displayed even if there is paper.
If this condition occurred four times, SC502-02
will be displayed.
Shorted SC502-01 is displayed.
Upper Paper End
(S13)
235-8
(PFB)
Open The Paper End indicator lights even if paper is
placed in the upper paper tray.
Shorted The Paper End indicator does not light even if
there is no paper in the upper paper tray.
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