Sharp MX-3500N Service Manual page 77

(The following items affect the copy color balance/density
adjustment, and must be checked and adjusted before execu-
tion of the image quality adjustments.)
1) The following adjustment items must be adjusted properly.
Job
Adjustment item
No
ADJ Image density ADJ Color image sensor calibration
5 sensor, image 5A
registration
ADJ Color image density sensor,
sensor
5B black image density sensor,
adjustment
image registration sensor
adjustment
ADJ Image skew adjustment (LSU (writing) unit)
6
ADJ OPC drum ADJ OPC drum phase adjustment
7 phase 7A (Auto adjustment)
adjustment
ADJ OPC drum phase adjustment
7B (Manual adjustment)
ADJ Image ADJ Image registration adjustment
10 registration 10A (Main scanning direction, sub
adjustment scanning direction) (Auto
(Print engine adjustment)
section)
ADJ Image registration adjustment
10B (Main scanning direction)
(Manual adjustment)
ADJ Image registration adjustment
10C (Sub scanning direction)
(Manual adjustment)
2) The set values of the following simulations must be set to the
default values.
SIM No Adjustment/setting item
46-1 A – U
46-2 A – L
46-10 A – O
46-16 A – O
3) The following items (correction functions) of SIM 44-1 must be
set to ENABLE (default).
Display Content
HV Normal operation high-
density process control YES/
NO setting
HT Normal operation half-tone
process control YES/NO
setting
TC Transfer output correction
YES/NO setting
MD VG Membrane decrease grid
voltage correction YES/NO
setting
MD LD Membrane decrease laser
power voltage correction
YES/NO setting
MD EV Membrane decrease
environment grid voltage
correction YES/NO setting
MD DL Membrane decrease
discharge light quantity
correction YES/NO setting
MD DL EV Membrane decrease
environment discharge light
quantity correction YES/NO
setting
TN_HUM Toner density humidity
correction YES/NO setting
TN_AREA Toner density area correction
YES/NO setting
Simulation
to be used
44-13
44-2
64-1/61-4
50-22
44-31
50-22
50-20
50-21
Default value
50
50
500
500
Default
Set range
value
Normal Allow
(Inhibit: 1: NO)
Highlighted
(Allow: 0: YES)
Allow
Allow
Allow
Inhibit
Allow
Allow
Inhibit
Allow
Allow
MX3500N ADJUSTMENTS 6 – 32
Display Content
TN_LIFE Toner density life correction
YES/NO setting
TN_COV Toner density print rate
correction YES/NO setting
TN_PROCON Toner density process control
correction YES/NO setting
TN_ENV Toner density environment
correction YES/NO setting
TN_DRIP Toner density correction,
unconditional supply YES/
NO setting
TN_SPEND Toner compulsory
consumption mode YES/NO
setting
PHT 1Pixel half-tone process
control correction YES/NO
setting
AR_AUTO Auto resist adjustment YES/
NO setting
AR_ERROR Error check YES/NO setting
during auto resist adjustment
DM_PHASE Drum phase alignment YES/
NO setting
SENSITIVITY Toner density correction
YES/NO setting
PRT_HT Half tone process control
printer correction feedback
Enable/Disable setting
(The following items affect the copy color balance/density
adjustment, but it is not required to adjust them frequently.
When, however, a trouble occurs, check and adjust them.)
1) The following items must be adjusted properly.
Job No Adjustment item
ADJ 1 Developing doctor gap adjustment
ADJ 2 Developing roller main pole position adjustment
ADJ 4 High voltage ADJ
adjustment 4A
ADJ
4B
ADJ
4C
ADJ 12 Scan image focus adjustment (CCD unit position
adjustment)
(Relationship between the servicing job contents and the copy
color balance/density adjustment)
Note that the preliminary jobs before execution of the copy color
balance/density adjustment depend on the machine status and the
servicing conditions.
Follow the flowchart of the copy color balance/density adjustment
procedures depending on the actual conditions.
There are following four, major cases.
1) When installing the machine.
2) When the periodic maintenance is performed.
3) When a repair, an inspection, or a maintenance is performed.
(When a consumable part is replaced.)
4) When a repair, an inspection, or a maintenance is performed.
(Without replacement of a consumable part)
Default
Set range
value
Normal Allow
(Inhibit: 1: NO)
Highlighted
(Allow: 0: YES)
Allow
Allow
Allow
Allow
Allow
Inhibit
Allow
Allow
Allow
Inhibit
Allow
Simulation
to be used
Main charger grid voltage 8-2
adjustment
Developing bias voltage 8-1
adjustment
Transfer voltage adjustment 8-6