Ricoh B264 Service Manual page 290

SERVICE PROGRAM MODE TABLES
4610* Standard White Level Adjustment: This Time
After the white peak level density has been adjusted manually with SP 4605 2, this
SP code detects the difference between the adjustment and the target reference
and stores this value in NVRAM.
[0~255/150/1]
4613* Standard White Pre-Level Adjustment: Last Time DFU
4616* Standard White Level Adjustment: At Factory DFU
4624* BK Adjustment DFU
These SP codes allow you to confirm the values for rough and detail adjustments
of the black level even and odd channels when the machine was turned on. You
can also adjust these values manually with the 10-key pad. If you change any of
these SP codes manually, be sure to turn the machine off and on to enable the
new settings.
4624 1 EVEN
4624 2 ODD
4624 3 EVEN
4624 4 ODD
4629* Gain Adjustment: Current
When the machine is turned on, the SBU performs separate fine adjustments for
Ech (the even channel) and Och (the odd channel). These SP codes read the
values of adjustments done after the machine was powered on. These SP codes
should display 223±1, set by the white level peak adjustment as the fine gain
adjustment and sent to the DAC.
You can use these SP codes to adjust the value manually. Be sure to turn the
printer off and on to enable any settings that you change.
4629 1 EVEN
4629 2 ODD
4640* SBU Setting DFU
4640 1 Black Level Loop Count: Offset 1
4640 2 Black Level Loop Count: Offset 2
4641* SBU Setting: White Level Loop Count
Displays the number of loops executed during white peak level adjustment for
AGC (Automatic Gain Control). This SP is for display only and the value cannot be
adjusted. NIA
[0~255/0/1]
B264/B265
Rough adjustment, this time
[0~255/200/1]
Detail adjustment, this time
[0~255/200/1]
EVEN Channel (Ech) [0~255/0/1]
ODD Channel (Och) [0~255/0/1]
5-26
[0~255/0/1]
SM