Ricoh FT5535 - Page 231

5. ELECTRICAL COMPONENT DEFECTS
5.1 SENSORS
Component
(Symbol)
CN Condition Symptom
(When the main switch is turned on.)
By-pass Feed
Paper Width (S1)
126-9~12 Open
The copier does not turn on the bypass
indicator.
Shorted
The CPU cannot detect the proper paper
size.
By-pass Feed
Paper End (S2)
126-7 Open
The Paper End indicator lights even if
paper is placed on the by-pass feed table.
Shorted
The Paper End indicator does not light
even if there is no paper on the by-pass
feed table.
Upper Tray Paper
End [Non-duplex
machines only] (S3)
131-2 Open
The Paper End indicator lights even if
paper is placed on the by-pass feed table.
Shorted
The Paper End indicator does not light
even if there is no paper on the by-pass
feed table.
Upper Relay (S4)
*Misfeed detect
128-4 Open
Paper jam type A occurs whenever a copy
is made.
Shorted
The Paper Jam A indicator lights even if
there is no paper.
Upper Tray Upper
Limit
[A153/A155
machines only] (S5)
131-8 Open
The Paper End indicator lights even if
there is paper on the tray.
Shorted
The tray bottom plate locks at the upper
position.
Lower Tray Paper
End (S6)
134-2 Open
The Paper End indicator lights even if
paper is present.
Shorted
The Paper End indicator does not light
even if there is no paper.
Lower Relay (S7)
*Misfeed detect
128-1 Open
A paper jam type A occurs whenever a
copy is made.
Shorted
The Paper Jam A indicator lights even if
there is no paper.
Lower Tray Upper
Limit
[A153/A155/
A156 mchines
only] (S8)
134-8 Open
The Paper End indicator lights even if
there is paper on the tray.
Shorted
The tray bottom plate locks at the upper
position.
LCT Lower Limit
[LCT machines
only] (S9)
132-10 Open
The LCT bottom plate does not lower.
Shorted
When the bottom plate is lowered, it locks
at the lowest position.
LCT Paper End
[LCT machines
only] (S10)
129-7 Open
The Paper End indicator lights even if
there is paper in the LCT.
Shorted
The Paper End indicator does not light
even if there is no paper.
Rev. 7/95
FT5535/4527/4522 6-44 FSM