Sharp AR-BC260 Service Manual page 107

ADJ 5 Image position/print area adjustment (Print engine section)
ADJ 5A Main scanning direction image
position adjustment (Print engine
section)
This adjustment must be performed in the following cases:
• When the paper tray is replaced.
• When the paper tray section is disassembled.
• When the manual paper feed tray is replaced.
• When the manual paper feed tray is disassembled.
• When the duplex section is disassembled.
• When the duplex section is installed or replaced.
• When the large capacity paper feed tray is installed or replaced.
• When the large capacity paper feed tray is disassembled.
• When a U2 trouble occurs.
• When the ICU main PWB is replaced.
• When the EEPROM of the ICU main PWB is replaced.
1) Enter the SIM 50-10 mode.
2) Select the paper feed mode to be adjusted with the scroll key.
3) Press the [EXECUTE] key.
The adjustment pattern is printed.
4) Check the adjustment pattern image position.
Measure the sizes of the void area on the front and the back
edges of the adjustment pattern, and check that the following
conditions are satisfied.
If A – B = 0 ± 4.0mm, there is no need to adjust.
If the above condition is not satisfied, perform the following
procedure.
A
B
5) Change the adjustment value.
(Enter the adjustment value and press the [OK] key.)
When the adjustment value is increased, the image is shifted
backward.
When the adjustment value is decreased, the image is shifted
forward.
A change in the set value by 1 corresponds to a change in the
shift by about 0.1mm.
Repeat procedures 3) – 5) until the condition of procedure 4)
is satisfied.
If the above procedure does not satisfy the condition of 4),
perform the following procedure.
6) Loosen the paper feed tray cover fixing screw, and shift the
ADJ 5B
This adjustment must be performed in the following cases:
• When a U2 trouble occurs.
• When the ICU PWB is replaced.
• When the EEPROM of the ICU PWB is replaced.
1) Enter the SIM 50-5 mode.
2) Select the paper feed mode with the scroll key.
3) Press the [EXECUTE] key.
4) Check the adjustment pattern image position.
+ -
A–B = 0 4.0mm
5) Change the adjustment values of item A (DEN-C) and B
AR-BC260 SETTING AND ADJUSTMENTS 8 - 14
installing position in the arrow direction.
Perform procedures from 2) again.
Paper feed tray cover
fixing screw
Perform the above procedures for all paper feed units.
Sub scanning direction image
position/print area adjustment
(Print engine section)
The adjustment pattern is printed.
+ -
A = 4.0 2.0mm
+ -
B = 4.0 2.0mm
A
Measure the sizes of the void area on the left and the right
edges of the adjustment pattern, and check that the following
conditions are satisfied.
If A = 4.0 ± 2.0mm and B = 4.0 ± 2.0mm, the adjustment is not
required.
If the above condition is not satisfied, perform the following
procedure.
(DEN-B), and press the [EXECUTE] key.
When the adjustment value of item A (DEN-C) is decreased by
1, the print start position in the sub scanning direction is
shifted to the paper lead edge by 0.125mm.
When the adjustment value of item B (DEN-B) is decreased by
1, the print start position in the sub scanning direction is
shifted to the paper rear edge by 0.125mm.
Repeat procedures 3) – 5) until the condition of procedure 4)
is satisfied.
Paper feed tray cover
fixing screw
B