Ricoh A085, Manual

Page: 612 / 617

4. ELECTRICAL COMPONENT DEFECTS
4.1 SENSORS
Component
(Symbol)
CN Condition
Symptom
Main SW turns on Ready condition
By-pass
feed table
(S1)
104-B9
Open
"By-pass feed"
indicator lights even if
the by-pass feed table
is closed.
By-pass feed mode is
selected and "paper
end" indicator lights.
Shorted
By-pass feed mode cannot be selected even if
the by-pass feed table is opened.
Upper tray
set (non-
duplex
machine
only) (S2)
104-B18
Open
After loading paper, "Paper end" indicator
lights when the upper tray is selected.
Shorted
"Paper size" indicator does not light and upper
tray cannot be selected, even if the paper tray
is set.
Lower tray
set (S3)
104-B20
Open
After loading paper, "Paper end" indicator
lights when the lower tray is selected.
Shorted
"Paper size" indicator does not light and lower
tray cannot be selected, even if the paper tray
is set.
By-pass
feed paper
end (S4)
105-B11
Open
"Paper end" indicator does not light even if
there is no paper on the by-pass feed table.
Shorted
"Paper end" indicator still lights even if paper
is set on the by-pass feed table.
Upper tray
paper end
(non-duplex
machine
only) (S5)
104-B5
Open
When upper tray is selected "Paper end"
indicator still lights, even if paper is added.
Shorted
when upper tray is selected"Paper end"
indicator does not light, even though paper
there is no in the upper tray.
Lower tray
paper end
(S6)
104-B14
Open
when lower tray is selected, "Paper end"
indicator still lights even if paper is added.
Shorted
When lower tray is selected, "Paper end"
indicator does not light, even though there is
no paper in the lower tray.
Upper tray
upper limit
(non-duplex
machine
only) (S7)
104-B8
Open
When the last paper has fed out from the
upper tray, "Paper end" indicator lights for an
instant.
The upper tray lift motor does not rotate.
Shorted
After drinking the paper size indicator,
"SC#41" is displayed.
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
≤
0.5 V
≥
0.9 Vcc
Trouble-
shooting
12 February 1992 ELECTRICAL COMPONENT DEFECTS
6-37