Paper Tray Heater; Tray Set Detection - Ricoh FT7770 Service Manual

30
April, '89

2. Paper Tray Heater

T h e t r a y h e a t e r i s
heaters.

3. Tray Set Detection

When the tray is pulled out, the
signal at CN204-A8 changes from 0
turns off the paper size display.
When the tray is set, CN204-A8 goes from a 9-volt pulse to 0 volts. The
CPU then reads and displays the paper size and checks paper volume.
the same in form and operation as the copier tray
ground connection is broken, and the
volts to a 9-volt pulse. The CPU then
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