Cdrh Ordinances; Functional Configuration; Functional Construction; Basic Sequense - Canon MF8100 Series Service Manual

Chapter 1
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.

1.3.5 CDRH Ordinances

The Center for Devices and Radiological Health (CDRH) of the US Food and Drum Administration put into force ordinances related to laser products on August
2, 1976. These ordinances apply to laser products manufactured on and after August 1, 1976, and sale of laser products is prohibited within the US unless they bear
a certificate of compliance. The following is the label that indicates compliance with the CDRH ordinances, and it must be found on all laser products sold in the US.
The description may vary from model to model.

1.4 Functional Configuration

1.4.1 Functional Construction

The machine may be divided into the following 6 functional blocks: system control block, reader control block, printer control block, laser/scanner block, image
formation block, pickup/feeder block.
The following is a diagram showing these blocks:

1.5 Basic Sequense

1.5.1 Basic Operation Sequence

The operation sequences for the printer are controlled by the CPU in the DCNTboard in the engine control system. The table below indicates the purposes and
engine operations of each period from when the power is turned on until a print operation is completed and each motor stops rotating. See the appendix for the
timing chart.
Period
WAIT
(Wait)
STBY
(Standby)
INTR
(Initial
rotation)
1-6
System control
system
Print control
system
From the power switch is
turned on until ITB cleaning
is completed.
From the end of the WAIT
or LSTR period until a print
command is input from the
interface controller or the
power switch is turned off.
After the input of a print
command from the interface
controller until the ITB
HOME POSITION
DETECTION (HP1) signal
for the first color is detected.
F-1-7
Eeposure control system
Laser exposure system
Image formation system
fixing system
Pickup / feed system
F-1-8
T-1-1
Purpose Remarks
To clear a potential on the In this period, the printer executes
drum surface and clean the residual paper detection, toner level
ITB. detection, image density calibration
control, etc.
To keep the printer ready to
print.
To stabilize sensitivity of the
photosensitive drum in
preparation for printing.
0011-0549
0007-4972
0008-1692