Ricoh Aficio BP20N, Service Manual

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OPERATION PANEL DISPLAY
G144/G145 4-10 SM
4.3.2 PRINTING A CLEANING SHEET
You should print a cleaning sheet if printed images are blurred, faded, or smeared.
The machine cleans the drum inside the toner cartridge when you print a cleaning
sheet. A page with toner debris is output when you print the cleaning sheet. Ensure
that you discard this sheet.
Perform the following procedure to print the cleaning sheet:
1. Ensure that the machine is turned on and in the ‘Ready Mode’, and that paper
is loaded in the paper tray unit.
2. Press and hold the cancel button for approximately 10 seconds. The machine
automatically prints out the cleaning sheet.
NOTE: It will take 15-20 seconds, after you release the cancel button, for the
cleaning sheet to print.
4.4 OPERATION PANEL DISPLAY
The table below shows error messages that appear on the operation panel.
Error LED Status
Open fusing unit error
The [Error] LED (red) and the [Toner Save] LED flash simultaneously
at 1 second intervals.
Overheat error The [Error] LED (orange) and the [Toner Save] LED flash
simultaneously at 1 second intervals.
Low heat error The [Error] LED (red) and the [Toner Save] LED flash simultaneously
at 4 second intervals.
LSU not ready error
(polygon motor error) The [Error] LED (green) and the [Toner Save] LED flash simultaneously
at 1 second intervals.
LSU not ready error
(HSYNC error) The machine stops printing and the [Error] LED (green) and the
[Toner Save] LED flash simultaneously at 4 second intervals.
4.5 PERIODIC DEFECTIVE IMAGE
Number Roller Defective Image Description
1 OPC drum 75.5 mm White spots on black image, or black
spots.
2 Charge roller 37.7 mm Black spots
3 Supply roller 44.9 mm Light or dark horizontal bands
4 Developing roller 35.3 mm Horizontal image band
5 Transfer roller 47.1 mm Ghosting
6 Hot roller 78 mm Black spot and ghosting
7 Pressure roller 75.5 mm Black spots on the rear side of the
printout