Ricoh A230, Service Manual, Page: 54 / 1134

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ELECTRICAL COMPONENT DESCRIPTIONS
1-13
SM A230/A231/A232
Symbol
Index
No.
Description Note
M8 34 Toner Supply Rotates the toner bottle to supply toner to
the development unit.
M9 56 PSU Cooling
Fan Removes heat from the PSU.
Sensors
S1
2 Scanner Home
Position Informs the CPU when the 1st and 2nd
scanners are at the home position.
S2 3 Platen Cover Informs the CPU whether the platen
cover is up or down (related to APS/ARE
functions).
ARE: Auto Reduce and Enlarge
S3 12 Original Width Detects the width of the original. This is
one of the APS (Auto Paper Select)
sensors.
S4 5 Original Length-
1 Detects the length of the original. This is
one of the APS (Auto Paper Select)
sensors.
S5 6 Original Length-
2 Detects the length of the original. This is
one of the APS (Auto Paper Select)
sensors.
S6 21 LD Unit Home
Position Informs the CPU when the LD unit is at
the home positon.
S7 17 Toner Density
(TD) Detects the amount of toner inside the
development unit.
S8 24 Paper Exit Detects misfeeds.
S9 27 Registration Detects the leading edge of the copy
paper to determine the stop timing of the
paper feed clutch, and detects misfeeds.
S10 26 Image Density
(ID) Detects the density of various patterns
and the reflectivity of the drum for
process control.
S11 28 Upper Paper
Height Detects when the paper in the upper
paper tray is at the feed height.
S12 30 Lower Paper
Height Detects when the paper in the lower
paper tray is at the feed height.
S13 29 Upper Paper
End Informs the CPU when the upper paper
tray runs out of paper.
S14 31 Lower Paper
End Informs the CPU when the lower paper
tray runs out of paper.
S15 33 Upper Relay Detects misfeeds.
S16 32 Lower Relay Detects misfeeds.