Ricoh B264 Service Manual page 272

SERVICE PROGRAM MODE TABLES
2109* LD Beam Pitch Adjustment
Adjusts the beam gap for the dual beam system. After replacing the LD unit or
replacing or clearing the NVRAM, use this SP mode to adjust the laser beam
pitch.
This adjustment is performed by specifying the number of pulses to the stepper
motor that will adjust the angle of rotation of the LD unit from the home position.
2109 1* 400 dpi
Adjusts the laser beam pitch value for 400 dpi resolution.
After replacing the LD unit or replacing or clearing NVRAM, use this SP and SP2-
109-3 to adjust the laser beam pitch.
2109 2* 600 dpi
Adjusts the laser beam pitch value for 600 dpi resolution.
After replacing the LD unit or replacing or clearing NVRAM, use this SP and SP2-
109-4 to adjust the laser beam pitch.
2109 3* 400 dpi Initial Setting
Initializes the laser beam pitch for 400 dpi using the value for SP2-109-1.
After entering a value for SP2-109-1, this SP must be used.
2109 4* 600 dpi Initial Setting
Initializes the laser beam pitch for 600 dpi using the value for SP2-109-2.
After entering a value for SP2-109-2, this SP must be used.
2109 5* Auto Pitch Adjustment
Interval
Sets the interval for automatic laser beam pitch adjustment.
When the number of times that the resolution has been changed reaches this
value, the laser unit position is automatically corrected.
2109 6 Current LD Unit Position
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.
2109 7 Beam Pitch Change Counter
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 zero.
2109 8 Beam Pitch Data Reset
Resets the values of SP2-109-6 and SP2-109-7.
After replacing the LD unit, this SP mode must be performed. See the LD Unit
Removal Procedure.
2110 Test Mode dpi
Sets the scanning resolution (dpi).
Note: Any setting other than 0, 4, or 8 will cause an error.
0 = 400 x 400 dpi
1 = 391 x 406 dpi
4= 300 x 300 dpi
8= 600 x 600 dpi
B264/B265
[400 dpi: [8~ 262 / 144 / 1 pulse step]
[600 dpi: [30 ~ 284 / 168/ 1 pulse step]
[0 ~ 65535 / 1000 / 1 step]
DFU, [See below / 8/ 0 ~ 18]
15 = 439 x 430 dpi
16 = 476 x 476 dpi
17 = 483 x 465 dpi
18= 465 x 483 dpi
5-8 SM