Ricoh A085, Manual

Page: 292 / 617

4.8 OPTICAL COMPONENT CONTROL TIMING
4.8.1 Normal Copying (A4 sideways, full size)
T1: When the platen cover is being closed after positioning an original, the
platen position sensor is activated and the original size data is stored by
the CPU (first check).
T2: When the platen cover is completely closed, the platen cover switch is
activated. The CPU takes the second original size data and determines
the original size by comparing the fist and the second data.
T3: When the start key is pressed, the copier starts the copy job if the
appropriate paper is loaded in paper trays. If there is no paper of the
appropriate size, the copier stops and "check paper size" indicator blinks.
T4: The drum idling period for the preparation of paper feed after the start
key is pressed. At this timing, paper feeding starts. This period differs
depending on the paper feeding station.
By-pass
feed table
Upper
paper tray
Lower
paper tray
After the start key
is pressed
Black 255ms 200ms 27ms
Color 3,922ms 3,867ms 3,394ms
(The drum idling period for color is much longer than for black
because of the development unit change time.)
ON
200 0
Return
394
1167
455
356
T2
T1 T3 T4 T5
T8
T7 T6
T10
28
Correction 1
200 0
Correction 2
172 0
(511)
Lead Edge
(555) 0
Platen Position
Sensor
Original Size
Detection
Palten Cover
Switch
Exposure Lamp
Scanner
Motor
ADS Detection
T9
Timing (ms)
Original
Set
Start Key
Det
a
il
ed
Descriptions
12 February 1992 OPTICS
2-37