Gp 6 Maintenance - Xerox WorkCentre M20 Service Manual

GP 6 Maintenance

Purpose
To give details of the maintenance tests or procedures that can be performed in service mode,
GP 3:
• Serial Number
• Clean Drum
• New Drum
• Notify Toner Low
• Billing Counters
• Send Level
• Dial Mode
• Switch Test
• Modem Test
• DRAM Test
• ROM Test
• Pattern Test
• Shading Test
• Error Rate
• Modem Speed
• Engine Test
• Silence Time
• Flash Upgrade
• Reset Passcode
• Memory Clear
• ADF Test
• DADF Diagnostic
Serial Number
Use this procedure to restore the machine serial number after replacing the Main PBA.
The serial number of each machine is on the data plate on the rear cover and behind the front
door.
The serial number should be 16 digits. The actual serial number is comprised by the product
code of 3 digits and serial number of 6 digits. Therefore the last 7 digits are input by null code
'0'. Example: RYR361001 = RYR3610010000000.
Clean Drum
Use this procedure to clean the toner remaining on the OPC drum, so a clean printout can be
obtained. Perform this procedure if stains or specks appear on the prints and print quality is
defective.
The machine automatically prints a sheet of paper. The toner particles on the OPC drum sur-
face are fixed to the paper.
WorkCentre M20, 4118, FaxCentre 2218 Family
It may be necessary to perform this procedure several times until a clean print is produced.
New Drum
If the 'New OPC Error' message is displayed after initial power on or after closing the cover
after installing a new drum, it makes installing a new drum compulsory.
Notify Toner Low
When this feature is enabled, if the toner level becomes low, the information will be sent to a
specified contact point, for example, the service company. To enable, access this menu, select
ON, and when the LCD prompts, enter the name and the number of the contact point, the cus-
tomers fax number, the model name, and the serial number.
Billing Counters
Displays the following counters
• Total impressions
• Toner impressions
• Drum impressions
• DADF scanned pages
• Platen scanned pages
• Replaced toner
• Replaced drum
Send Level
The transmission signal level can set. Typically, the level should be under -12dBm.
NOTE: The send fax level is set at the optimum level during manufacture. Do not change the
send fax level arbitrarily.
Dial Mode
Refer to GP 4.
Switch Test
Use this feature to test all keys on the operation control panel. The result will be displayed on
the LCD window each time you press a key.
Modem Test
Use this procedure to hear various transmission signals to the telephone line from the modem
and to check the modem. If no transmission signal is heard, the modem part of the main board
is defective.
DRAM Test
Use this procedure to test the machines DRAM. The result will appear on the LCD display. If
the memory is working correctly, the LCD will display 'OK'.
December 2006
6-27
General Procedures and Information
GP 6