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DocuColor 12/DCCS50
Process Controls
Principles of Operation
Reissue
There are several different control routines which Process Controls runs in order to maintain
consistent image density and color balance. The following Table lists the routines and shows
when and what is performed.
Setup Mode
Most of the Process Controls routines run as setup routines. There are other routines that run
during Run Mode or during Standby Mode.
The Setup Mode will be split into two groups:
• Setup routines in Diagnostics - These are proc
edures that are performed by the Service
Representative while running Diagnostics routines.
• Setup routines that run automatically - These ar
e procedures which Process Controls will
run automatically and are a subgroup of Diagnostics.
Setup routines in Diagnostics
The Service Representative enters Max Se
t Up from the Diagnostics menu to perform the bal-
ance of the Setup routines. The Max Set Up menu includes nine (9) routines:
Table 1 Process Controls routines
CONTROL ROUTINE WHEN PERFORMED WHAT IS PERFORMED
Max Set Up Performed in Diagnostics by
t
he Serv
ice Representative
• At machine install
• After changing the ADC
S
ensor,
ENV Sensor,
Developer Housings or
developer materials
• During repair or cleaning
o
f t
he xerographics
• During any service call
as
a precaution measure
• Adjust color density
Any or all the following sub-
routines can be performed:
• ESV Sensor check
• Environmental Sensor
(ENV
) check
•
Vh/Vm Setup
• ADC Automatic Gain
Control (AGC
) Setup
• ADC Setup
• IOT Hi-light Setup
• Color Balance Setup
Mini Setup Runs automatically at the start
of th
e first job after:
• Power up, if the Fuser
t
emperat
ure has
dropped below 120°C
• Rest (Stand-by Mode) of
m
ore t
han 4 hours
• When Fuser temp is less
than 120°C
Tw
o subroutines run in the
order l
isted:
• Vh/Vm Setup
• Two patches are made
f
or each color and
read
by the ADC to determine
the amount of toner to
dispense
• Using the same patch
readings as
in previous
rout
ine, set TRC Cont 1
Checkup Runs automatically at the start
o
f th
e first job after:
• Power up, if the Fuser
t
em
perature is above
____°C
• A paper jam
• 30 minutes of elapsed
t
ime si
nce the last
Checkup
• end of a job run
One Subroutine runs:
• Vh/Vm Setup
Run Mode Control Runs automatically during all
jobs
The following items are con-
trolled:
• Vm patch is made and
l
as
er diode (LD) power is
adjusted about every 12
IBT cycles and at the
end of every job,
depending upon paper
size.
• Toner dispensing is con-
trolled by pixel count
(I
CDC) and
periodic
ADC readings (approx.
every 13 copies, depend-
ing upon paper size)
• Using the same patch
readings a
in previous
reading, set
TRC Cont2
Table 2 Max Setup Routines
Diagnostic Code Description Contents
dC945 IIT Calibration IIT and CCD Calibration, and White Refer-
ence Adjustment
dC934 ADC/AGC Setup Adjusts ADC Sensor gain to get a constant
Vclean
Table 1 Process Controls routines
CONT
ROL RO
UTINE WHEN PERFORMED WHAT IS PERFORMED
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