SERVICE PROGRAM MODE TABLES 20 June 2005
5-28
Gain Adjustment: Factory DFU 4678*
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 the adjustments in effect before 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.
46781 EVEN
46782 ODD
[0~255/0/1]
4691* White Peak Level
4691 1 EVEN
4691 2 ODD
[0~255/0/1]
4694* Black Level
4694 1 EVEN
4694 2 ODD
[0~255/0/1]
Black Level Adjustment Mode DFU 4800
This SP switches the black offset compensation mode on and off. Black offset
correction is done during automatic image density correction (ADS).
Note: This SP operates only if the black offset correction circuit is built into the
SBU.
0: Off
1: On
SBU Setting: Standard White Level Adjustment Loop Count DFU 4801*
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.
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