Sharp AR-285 (serv.man11) Service Manual ▷ View online
(2) Density adjustment procedure
a. Automatic adjustment for each density mode
1) Execute SIM 46-2 (2-value mode) and SIM 46-3 (HiFi mode).
2) Change the values to adjust.
3) Be careful that the following contents are automatically changed
when SIM 46-2 (2-value mode) is executed.
B: CH3.0 .....CH1.0
∼
5.0
(SIM 46-9 set value)
C: MIX3.0....MIX1.0
∼
5.0
(SIM 46-10 set value)
D: PH3.0 .....PH1.0
∼
PH5.0
(SIM 46-11 set value)
•
Be careful that the following contents are automatically
changed when SIM 46-3 (HiFi mode) is executed.
changed when SIM 46-3 (HiFi mode) is executed.
B: CH3.0 .....CH1.0
∼
5.0
(SIM 46-5 set value)
C: MIX3.0....MIX1.0
∼
5.0
(SIM 46-6 set value)
D: PH3.0 .....PH1.0
∼
PH5.0
(SIM 46-7 set value)
4) After changing the values, make a sample copy in each mode and
check the following specifications are satisfied.
•
Adjustment specifications
Mode
EXP
Chart
No.
Adjustment
level
Chart
No.
Adjustment
level
Character
3
3
Copied.
2
Not copied.
Character/
Photo
Photo
3
3
Copied.
2
Not copied.
Photo
3
3
Copied.
2
Not copied.
Auto
3
Copied.
2
Not copied.
When the sample copy is too light, make the values greater.
When the sample copy is too dark, make the values
smaller.
smaller.
Adjustment range: 30
∼
170
b. Individual adjustment in each mode
This adjustment is to set the values for each density level in each
mode. It is advisable to use the previous adjustment for each density
mode normally.
mode. It is advisable to use the previous adjustment for each density
mode normally.
1) Execute SIM 46-5 (HiFi Text) or SIM 46-11 (2-value photo individ-
ual setting). (The adjustment procedure of SIM 46-5 and SIM
46-11 are the same.)
46-11 are the same.)
2) Change the value to adjust.
3) After changing the values, make a sample copy and check it.
E. Paper feed
(1) Manual paper feed size detection level adjustment
1) Execute SIM 40-2.
2) Extend the manual paper feed guide fully.
3) Press [MAX POSITION] on the LCD of the operation panel to
highlight it.
4) Press [EXECUTE] on the LCD of the operation panel to highlight
it.
If normal, the highlight is shifted from [MAX POSITION] to [MIN
POSITION].
POSITION].
5) Narrow the manual paper feed tray guide fully.
6) Press [EXECUTE] on the LCD of the operation panel to highlight
it.
Check that [COMPLETE] is highlighted.
7) Press the CA key to cancel the simulation.
7 – 15
(2) Paper feed off-center adjustment
When the center of No. 1 and No. 2 paper feed trays is shifted with
the reference of manual paper feed and the self print, adjust as
follows.
the reference of manual paper feed and the self print, adjust as
follows.
1) Loosen the fixing screws a and b of the front cabinet of the paper
feed tray.
When fixing the front cabinet, the clearance between fixing
screw a and the cabinet and the clearance between fixing
screw b and the cabinet are symmetric.
screw a and the cabinet and the clearance between fixing
screw b and the cabinet are symmetric.
[Reference view]
2) Shift the front cabinet and adjust.
Move the front cabinet in the direction of A.
Move the front cabinet in the direction of B.
F. Paper transport
(1) Separation pawl operation timing adjustment
This adjustment is to adjust the time from when the resist roller is
turned on to when the drum separation pawl is turned on.
turned on to when the drum separation pawl is turned on.
1) Execute SIM 51-1.
2) Change value A and adjust the separation pawl operating timing.
Initial value:
310 ms
1 step:
1ms
Adjustment range:
1
∼
999ms
If the adjustment value is improper, a paper jam may resulted.
(2)
Resist amount adjustment
This adjustment is to adjust the timing (paper contact pressure) for
the resist roller in each paper feed mode.
the resist roller in each paper feed mode.
By changing the time difference (timing) between the transport roller
ON and the resist roller ON, the paper contact pressure on the resist
roller is changed.
ON and the resist roller ON, the paper contact pressure on the resist
roller is changed.
The adjustment value must be changed according to the copy paper
quality.
quality.
1) Execute SIM 51-2.
2) Change the adjustment value in each mode.
Mode
Initial
value (ms)
Set value
(ms)
A: MANUAL
Manual paper feed
50
0
∼
100
B: TRAY
Tray paper feed
50
0
∼
100
C: LCC
LCC paper feed
50
0
∼
100
D: ADU
ADU paper feed
50
0
∼
100
E: TRAY
Tray paper feed
(Low)
(Low)
50
0
∼
100
F: LCC
LCC paper feed
(Low)
(Low)
50
0
∼
100
G: SPF
SPF paper feed
50
0
∼
100
1 step: 1ms
When the set value is too small, the copy image position for the
paper may vary.
paper may vary.
When the set value is too great, a paper jam may occur.
Direction A
Direction B
(Reference view)
Section a
Section b
Paper center line
Image center line (First image)
Paper exit direction
Paper center line
Image center line (first image)
Paper exit direction
7 – 16
G. Others
(1) Original size sensor detection level adjustment
1) Execute SIM 41-2.
(Fig. 1)
2) Execute the sensor adjustment without original.
With the original cover open, without original on the table glass,
press the [EXECUTE] key to perform the sensor adjustment with-
out original. After adjustment, NORMAL or ABNORMAL is dis-
played.
press the [EXECUTE] key to perform the sensor adjustment with-
out original. After adjustment, NORMAL or ABNORMAL is dis-
played.
(Fig. 2)
(Fig. 3)
(In the case of NORMAL)
The screen of Fig. 2 is displayed for 1 sec, then the screen of Fig.
3 is displayed, and the sensor adjustment without original is com-
pleted.
3 is displayed, and the sensor adjustment without original is com-
pleted.
(Fig. 4)
(In the case of ABNORMAL)
The screen of Fig. 4 is displayed, and the sensor of abnormality is
highlighted. In this case, confirm the original empty state and
press the [EXECUTE] key to perform the sensor adjustment
again. 3) Perform the sensor adjustment without original.
highlighted. In this case, confirm the original empty state and
press the [EXECUTE] key to perform the sensor adjustment
again. 3) Perform the sensor adjustment without original.
3) Execute the sensor adjustment with original.
With the original cover open, place five sheets of A3 originals on
the glass by fitting them to the original guide, press the [EXE-
CUTE] key to perform the sensor adjustment with originals. After
adjustment, NORMAL or ABNORMAL is displayed.
the glass by fitting them to the original guide, press the [EXE-
CUTE] key to perform the sensor adjustment with originals. After
adjustment, NORMAL or ABNORMAL is displayed.
(In the case of NORMAL)
The screen of Fig. 2 is displayed for 1 sec, then the screen of Fig.
3 is displayed to terminate the adjustment of the original sensor.
3 is displayed to terminate the adjustment of the original sensor.
In this case, the display item of "2. A3 ORIGINAL" is shown
instead of "1. NO ORIGINAL" at the left top.
instead of "1. NO ORIGINAL" at the left top.
(In the case of ABNORMAL)
The screen of Fig. 4 is displayed for 1 sec, and the sensor of
abnormality is highlighted. In this case, check that there is no A3
original on the original glass, and press the [EXECUTE] key to
perform the sensor adjustment operation again.
abnormality is highlighted. In this case, check that there is no A3
original on the original glass, and press the [EXECUTE] key to
perform the sensor adjustment operation again.
In this case, the display item of "2. A3 ORIGINAL" is shown
instead of "1. NO ORIGINAL" at the left top.
instead of "1. NO ORIGINAL" at the left top.
(2) Original size sensor position adjustment
1) Execute SIM 41-1.
•
Slowly tilt the original detecting arm unit, and loosen the origi-
nal cover switch actuator adjustment screw, and slide and ad-
just the actuator so that the highlighted display of OCSW is
changed to the normal display when the height of the arm unit
top from the table glass is 32
nal cover switch actuator adjustment screw, and slide and ad-
just the actuator so that the highlighted display of OCSW is
changed to the normal display when the height of the arm unit
top from the table glass is 32
±
0.5 mm.
(When the original cover switch ON timing is shifted, the origi-
nal detection function may not work properly.)
nal detection function may not work properly.)
32 ± 0.5 mm
Table glass
Original detecting arm unit
Original cover switch actuator
Actuator adjustment screw
7 – 17
(3) Waste toner full detection level adjustment
1) Fill water to the empty waste toner bottles to make dummy bottle
A and B.
Dummy bottle A: 480g (including the bottle weight)
Dummy bottle B: 560g (including the bottle weight)
2) Turn on the power switch of the copier.
3) Install dummy bottle A (480g) to the waste toner bottle detecting
unit and check that the weight detection is OFF.
4) Install dummy bottle B (500g) instead and check that the weight
detection is ON.
"Weight detection ON" means that the display of "REPLACE
TONER BOTTLE" on the panel display is ON. "Weight detection
OFF" means that it is OFF.
TONER BOTTLE" on the panel display is ON. "Weight detection
OFF" means that it is OFF.
Initial value:
2 scales down from the center
[When ON/OFF display is improper]
Loosen the fixing screw of the positioning plate. Move he positioning
plate up and down to adjust so that the weight detection is made as
specified.
plate up and down to adjust so that the weight detection is made as
specified.
(4) Touch panel adjustment
1) Execute SIM 65-1.
2) When the "+" section is pressed, it turns to gray. When all the four
points are pressed, the touch panel adjustment is completed and
the machine goes into the simulation sub number entry state.
the machine goes into the simulation sub number entry state.
In case of abnormality, the mode returns to the input mode.
Do not use a sharp pin or needle to press the "+" points.
(5) Key touch sound volume adjustment
This adjustment must be performed in the following cases:
•
When the key touch sound volume is too small.
•
When the key touch sound volume is too great.
•
When the operation control PWB is replaced.
1) Remove the operation control PWB.
2) Turn the VR1 slider counterclockwise to set at about 135 degrees.
3) Use an actual machine and check the key input operations.
After this adjustment:
When the key touch sound volume is too small, turn VR1 clock-
wise.
wise.
When the key touch sound volume is too great, turn VR1 counter-
clockwise.
clockwise.
The weight detection level
for ON becomes greater.
for ON becomes greater.
Adjustment
plate
plate
The weight detection level
for OFF becomes smaller.
for OFF becomes smaller.
Slider rotating direction
After adjustment
Adjust so that the cross of of the slider comes
on this terminal side.
on this terminal side.
7 – 18
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