Paper Tray Heaters - Ricoh FT7770 Service Manual

30
April, '89

Paper Tray Heaters

12.
All the tray heaters, including that of the option tray, are controlled by
the same circuit.
- Main Switch OFF -
When the main switch is off, 100 volts ac is applied to the tray heater
If the humidity switch is on, the tray heaters stay on while the
circuit.
main switch is off.
- Main Switch ON -
When the main switch is on,
on the ac drive board.
conditions exist:
- The humidity switch is on
machine is in standby
- The
drum heater is off, or at least one fusing lamp is off
- The
the tray heaters are controlled through SSR-9
CPU turns on SSR-9 only when the following
The
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