Sharp SF-2020 Service Manual page 129

System operation when the power is turned on:
Power ON
Initial setting
Memory transfer
No
Trouble
No
JAM
Warm up
End of
warm up
Racing
End of racing
RPL ON
PSW ON
RPL OFF
Copy cycle
End of copying
12 – 2
Heater lampp ON
Mirror initial operation
Lens initial operation
Process contorol
Toner density control