e-STUDIO550/650/810 ADJUSTMENT
3 - 24
June 2002 © TOSHIBA TEC
(2) Operation
Connect the digital tester as described in (1) Preparation, and perform the following procedure to
adjust the outputs.
100%
100%
A3
A
XXX
YYY
100%
A3
A
A3
[0][5]
[POWER]
[Digital keys] : Enter the code.
[START]
[Up] or [Down]: Adjust the value “YYY” to satisfy the following table.
: Adjusted value “YYY” is stored in the BC-RAM.
Return to
쩸
to enter
the other adjustment
mode.
[POWER] OFF/ON : To exit the adjustment mode.
Code No.
Current set value
쩸
<Keys to press>
<Display>
TEST MODE
TEST MODE
TEST MODE
[SET]
or
[INTERRUPT]
(3) Precautions
(a) Developer bias
Note for adjustment
Adjust the developer bias if fogging occurs over the entire image even though the main charger grid
voltage and toner density are appropriate. The developer bias can be adjusted at the setting mode
(08-861, 862, 863, 860, 859) (about 36V/10 steps), and the equivalent number of steps must be
adjusted for the main charger grid when adjusting the developer bias (08-865, 866, 867, 864, 871).
However, the following problems may occur if the developer bias is lowered too much:
• Image contrast becomes low.
• Image is patchy or blurred.
• The carrier in the developer material adheres to the photoconductive drum, causing scratches
around the cleaner.
Main charger grid bias
Developer bias
Code
210
205
Adjustment value
-733±5V
-480±5V