30 April, ?89
12. Paper Tray Heaters
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
circuit.If the humidity switch is on,the tray heaters stay on while the
main switch is off.
- Main Switch ON -
When the main switch is on,the tray heaters are controlled through SSR-9
on the ac drive board.TheCPU turns on SSR-9 only when the following
conditions exist:
- The humidity switch is on
- Themachine is in standby
- Thedrum heater is off, or at least one fusing lamp is off
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