Ricoh A229 Service Manual page 241

SERVICE PROGRAM MODE
Mode No.
(Class 1 , 2 & & & & 3)
2-109 Laser Beam Pitch Adjustment
1 400 dpi
2 600 dpi
3 400 dpi Initial
Setting
4 600 dpi Initial
Setting
5 Auto Pitch
Adjustment
Interval
6 Current LD
Unit Position
7 Beam Pitch
Change
Counter
8 Beam Pitch
Data Reset
2-110 Test Mode dpi
A229
Function
* Adjusts the laser beam pitch value for 400
dpi resolution.
After replacing the LD unit or replacing or
clearing the NVRAM, use this SP mode
and SP2-109-3 to adjust the laser beam
pitch. Refer to "Replacement and
Adjustment - Laser Beam Pitch
Adjustment" for details.
* Adjusts the laser beam pitch value for 600
dpi resolution.
After replacing the LD unit , replacing or
clearing the NVRAM, use this SP mode
and SP2-109-4 to adjust the laser beam
pitch. Refer to "Replacement and
Adjustment - Laser Beam Pitch
Adjustment" for details.
* Initializes the laser beam pitch for 400 dpi
to the SP2-109-1 value.
After inputting a value for SP2-109-1, this
SP must be used.
* Initializes the laser beam pitch for 600 dpi
to the SP2-109-2 value.
After inputting a value for SP2-109-2, this
SP must be used.
* Inputs the interval for the automatic laser
beam pitch adjustment
When the number of times that the
resolution been changed reaches this
value, the laser unit position is
automatically corrected.
* Displays the current LD unit position
(number of pulses from home position). If
this is different from the value of 2-109-1 or
2-109-2, LD unit positioning has failed.
* Displays how many times the LD unit
position has been changed (how many
times the resolution has changed.)
When the laser beam pitch adjustment is
done, this counter is reset to "0".
* Resets the values of SP2-109-6 and SP2-
109-7.
After replacing the LD unit, this SP mode
must be done.
Designer use only. Do not change this
value.
4-14
Settings
0 ~ 262
4
pulses/step
144
0 ~ 284
4
pulses/step
168
Start
Start
0 ~ 65535
1/step
1000 times
0: 400 dpi
1: 600 dpi
2: 15.4 x 16
3: 16 x 15.4
SM