Code Description
P10 Set or clear departmental counter
P11 Display individual departmental counts
P13 Clear departmental counters
P14 Enter, clear or change department numbers
P16 Change max. number of copies that can be run
P18 Sends alarm if the wrong department number is tried three times in a row
P19 Change code number
P20 Adjust auto exposure
P21 Adjust automautic shufoff
P22 Adjust manual exposure
P23 Adjust auto clear time
P24 Set up fixed magnification settings
P25 Set maximum number of copies or of sets
P26 Binding margin
P27 Border erase setting
P28 Defaults at power on
P29 Display various counts
P30 Auto repeat on or off
P45 Message display time
P70 Auto paper select on or off
P71 Auto cassette select on or off
P72 Maximum copies in duplex
P73 Copy condition in rewrite
P74 Duplex limit when problems with duplex unit
P75 Prevent auto duplex
P76 Prevent stapling
P77 Prevent cover use
P90 List programs
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Copyng Process
How Photocopiers Work
( Minolta Digital )
1. PC Drum
· The drum is an aluminum cylinder coated with photosensitive material on which an electrostatic
latent image is produced.
2. Drum Charging
· A scorotron charger employing a comb electrode generates a negative DC charged
layer on the surface of the PC Drum.
3. Photoelectric Conversion Section
· The Exposure Lamp directs light onto the original. The light reflected off the original is
directed and resized by the mirrors and lens so as to produce a reduced-size image on
the CCD Sensor.
4. HGB Board
· Converts an electric signal into a corresponding 8-bit digital image signal (A/D conversion),
makes various corrections, and outputs the results to the MFB Board.
5. MFB Board
· Compresses the image data received from the HGB Board, stores it, and uncompresses
it.
6. Laser Exposure
· The laser beam emitted from the LD (laser diode) strikes the surface of the PC Drum,
creating an electrostatic latent image.
7. Development
· Negatively charged toner adheres to the latent image on the PC Drum surface, creating
a visible image.
8. Paper Feed
· Feeds sheets of paper from the appropriate paper source.
9. Image Transfer
· An Image Transfer Roller is used. A positive charge applied to the roller causes the visible
image on the surface of the PC Drum to transfer onto the front side of the paper.
10. Paper Separation
· The PC Drum Separator Fingers remove paper from the surface of the PC Drum.
11. Cleaning
· The Cleaning Blade scrapes residual toner off the surface of the PC Drum and the toner
is recycled back to the Developing Unit.
12. Erase
· The PC Drum is exposed to light, which effectively removes any residual charge from
the drum surface.
13. Fusing
· Heat and pressure applied by the Right and Left Fusing Rollers fuse toner on the paper.
14. Paper Exit
· Feeds paper out of the copier.
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RESET SAMSUNG ML 1640:
Just short out pins 1 & 4 of the 93c66 chip.
This will reset the counter every time you power up the printer. If you remove the short, the counter
will resume counting but the service date information will not be the same.
Tested using the original initial cartridge.
I think if you want to use a replacement cartridge, you have to disconnect CN5 and short out CN9.
This way the toner will always be treated as the initial cartridge.