Service manual

ENGINE SERVICE MODE
SM 5-39 G130/G131
Service Tables
3122
[Vk Display] Vk Display ([Color])
3122 001 [K] *BCU
3122 002 [Y] *BCU
3122 003 [M] *BCU
3122 004 [C] *BCU
Displays the current Vk value.
[-255 to 255 / - / 1 V/step]
Normal Range: -50 to 50
3123
[Vref Display] Current Vref Display ([Color])
3123 001 [K] *BCU
3123 002 [Y] *BCU
3123 003 [M] *BCU
3123 004 [C] *BCU
Displays the current Vref value.
[2.0 to 4.0 / - / 0.1V/step]
3125
[Process Contr.] Process Control
ON/OFF *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
3125 001
Enables or disables process control.
LD Control *BCU [0 to 2 / 1 / 1/step] Alphanumeric
0: Fixed (at the value in SP2-103)
1: Process Control
2: LD Power
3125 002
Selects the LD control mode.
Auto TD Adj. *BCU [0 to 3 / 0 / 1/step] Alphanumeric
0: Disable
1: Initial
2: Job end
3: Initial & Job end
3125 003
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 user complains of toner density fluctuations. Before changing the
setting away from 0, check the result of the forced TD adjustment (SP3-126-2). If the
problem is persistent, then change to 1, 2, or 3. However, the machine takes several
minutes to do this adjustment.
ACC *BCU [0 to 2 / 2 / 1/step] Not used
0: Disable
1: Process Control
2: Auto TD Adj
3125 004
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 user’s requirement.
TD Adj. Cndtn *BCU [0 to 1 / 1 / 1/step] Alphanumeric
0: Unconditional, 1: Conditional
3125 005
Specifies whether temperature and humidity are taken into account when deciding
the timing of the auto toner density adjustment (described in SP3-125-3).
Timing for the auto toner density adjustment is determined by the setting of SP3-
125-3. 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.