Gestetner B147 Service Manual page 1049

Rev. 01/2005
[Vref Display] Current Vref Display ([Color])
3-123
Displays the current Vref value.
3-123-1 [K]
3-123-2 [Y]
3-123-3 [M]
3-123-4 [C]
3-125 [Process Control]
3-125-1 ON/OFF
Enables or disables process control.
3-125-2 LD Control
Selects the LD control mode.
⇒
3-125-3 Auto TD Adj.
NOTE: The words seen on
the display are indicated in
Italics.
Specifies when to perform the Auto Toner Density Adjustment. When performing the
Auto Toner Density Adjustment, the machine supplies or consumes toner so that the
development gamma is within ± 0.15 of the gamma target.
Change if the customer complains of toner density fluctuations. Before changing the
setting away from 0, check whether the forced TD adjustment (3-126-2) is effective. If
the problem is persistent, then change to 1, 2, or 3. However, the machine takes
several minutes to do this adjustment.
3-125-4 ACC
Enables or disables the process control self-check before printing the ACC pattern.
NOTE: If color balance changes during multi-copy runs after ACC is performed, select
1 or 2. Setting 2 can precisely adjust the image density; however, it takes about 6
minutes. Select 1 or 2 depending on the customer's requirement.
⇒
3-125-5 TD Adj. Cndtn
Specifies whether temperature and humidity are taken into account when deciding the
timing of the auto toner density adjustment (described in SP 3-125-3).
Timing for the auto toner density adjustment is determined by the setting of SP3-125-
003. In addition, if SP 3-125-5 is set to 1, the auto toner density adjustment is done
when the temperature and humidity meet specified conditions (same conditions as
used for transfer current correction).
Specify "1" when both temperature and humidity are both high or low.
SM
*BCU [ 0.0 to 5.0 / - / 0.1V/step ]
*BCU
*BCU
*BCU
*BCU [ 0 or 1 / 1 / 1/step ] Alphanumeric
0: OFF (Use the fixed values for VD, VL and
VB set with SP2-001, SP2-103, and SP2-201.)
1: ON
*BCU [ 0 to 2 / 1 / 1/step ] Alphanumeric
0: Fixed (at the value in SP2-103)
1: Controlled by process control
2: Controlled by LD power selection
*BCU [ 0 to 3 / 0 / 1/step ] Alphanumeric
0: Disable
1: Initial & Non-use self-check
2: Job End & Non-use self-check
3: Initial & Job End & Non-use self-check
*BCU [ 0 to 2 / 2 / 1/step ]
0: Disable
1: Process Control Self-check
2: Auto TD Adjustment & Process Control Self-
check
*BCU [ 0 to 1 / 1 / 1/step]
0: Unconditional
1: Conditional
5-29
COPY SERVICE MODE
B147/B149/B190