Ricoh FT 4015 Service Manual page 63

20 December 1996
10.8 OTHERS
[B]
10.8.1 Paper Size Detection
There are four microswitches [A] on the front right plate of the main frame.
The sensors are actuated by a paper size actuator [B] behind the paper size
indicator plate on the front right of the tray. Each paper size has its own
actuator, with a unique combination of notches. To determine which size tray
has been installed, the cpu reads which switches have been pressed. The
cpu disables paper feed if the paper size cannot be detected. If the paper
size actuator is broken, or if there is no tray, the Add Paper indicator will light.
When the paper size actuator is at the "*" mark, the paper tray can be set up
to accommodate one of a wider range of paper sizes. The setting for this
mode is performed with SP74. Paper length will be taken from this setting,
and not from the registration sensor readings.
Because of the limited space on the operation panel, not all the paper sizes
possible with the paper size actuator can be displayed on the operation
panel. In some cases, the " * " mark will be displayed, but the machine will
operate in accordance with the selected paper size.
The paper size switch also acts as a tray open sensor.
10.8.2 Shock Absorber
At the position shown, a damper [C] is installed to reduce the shock to the
paper tray when it is pushed back into the copier. This is to prevent the stack
of paper inside the paper tray from coming over the corner separators, which
will cause double feeding or image skew on copies.
[C]
[A]
A219D525.wmf
2-49
PAPER FEED AND REGISTRATION
SW
(from right to left)
Size
A3, F( 8 "x13" )
1/2
A4 Lengthwise
A4 Sideways
A5 Sideways,
11"x17"
B4, 8 "x14"
1/2
B5 Sideways,
8 "x11"
1/2
B5 Lengthwise,
11"x8 "
1/2
* (Asterisk)
: ON (Not pushed)
1 2 3 4
: OFF (Pushed)