Background Diagnostics Entering The Background Diagnostic Mode; Exiting From The Background Diagnostic Mode; Initial - Xerox DocuPrint C55 Service Manual

BACKGROUND DIAGNOSTICS
The Background diagnostic mode is used
during manufacturing to set the basic printer
parameters and should rarely
adjustment in the field.
The Background Diagnostic Mode is used to :
Initialize the following:
• Gamma Sensor A (adjust)
• Gamma Sensor I (calibration)
• Gamma Sensor C (correction)
• Black Developer (Detect K TC)
• Color Developer (Detect C,M,Y, TC)
• Both Developers (Detect K,C,M,Y, TC)
• Drum
• Fuser
Set the Control Values for the following:
• Plain Paper Transfer Current
• Transparency Transfer Current
• Gamma Transfer Current
• K Developer Bias
• C Developer Bias
• M Developer Bias
• Y Developer Bias
• Process Control (Off, On)
• Fuser Motor Speed (GP 3.4)
• Paper Feed Motor Speed
Check and set the fuser temperature.
DocuPrint C55/C55mp/[NC60]
ENTERING THE BACKGROUND DIAGNOS-
TIC MODE:
1. Enter Normal Diagnostics.
Enter [7] + Power on).
require
2. Enter Special Diagnostics (while PCU
DIAG MODE XX is displayed, press On-
Line [0] then press Enter [7]. Release
both keys at the same time).
3. Enter Background Diagnostics (while PCU
DIAG MODE SPECIAL is displayed, press
Media Server [2] then press Previous
[5]. Release both keys at the same time).
4. The Message Display will indicate:
DIAG BACK GROUND
5. Press the Menu [3] key to step through
the diagnostic routines.
EXITING FROM THE BACKGROUND DIAG-
NOSTIC MODE:
1. When DIAG BACK GROUND is displayed
on the Message Display, press the Form
Feed [1] key to exit from Background
diagnostics to Normal diagnostics.
2. Press Form Feed [1] again to exit from
Normal Diagnostics.
3. Or, switch the power off wait 10 seconds
and then switch the power on.
This Diagnostic routine is used to initialize the
(Menu [3],
following printer parameters:
• Gamma Sensor A (adjust density)
• Gamma Sensor I (calibrate sensor)
• Gamma
• Black Developer (set current black TC as
• Color Developer (set current color TC as
• Both Developers (set current TC as toner
• Drum (reset drum counter)
• Fuser (reset fuser counter)
1. Enter Background diagnostics and press
2. Use the Previous [5]/Next [6] keys to
3. To initialize the item Insert a sheet of paper
4. When the initialization routine is compete
2/99
BACKGROUND DIAGNOSTICS
6-11

INITIAL

Sensor C (calculate
correction)
Black toner setpoint)
Color toner setpoint)
setpoint for all four colors)
the Menu [3] key until INITIAL GAMMA_A
is displayed on the Message Display.
select the parameter to be initialized.
into the bypass slot to actuate the Bypass
Switch, then press the Form Feed [1] key.
The On Line LED will switch on and then
off when the change is stored.
press Previous [5]/Next [6] key to select
the next parameter to be initialized.
GENERAL PROCEDURES
sensor