Gestetner G060 Service Manual page 554

COPY SP MODE
SP2-XXX (Drum)
2
(Class 1, 2, and 3)
[Charge Bias] Charge Roller Bias (DC or AC component: [Color], Process Speed)
001
U: Upper, L: Lower
1 DC:[K] 62.5
2 DC:[K] 125
3 DC:[K] 185
4 DC:[Y] 62.5
5 DC:[Y] 125
6 DC:[M] 62.5
7 DC:[M] 125
8 DC:[C] 62.5
9 DC:[C] 125
10 AC U Limit [K]
11 AC L Limit [K]
12 AC:[K] 62.5
13 AC:[K] 125
14 AC:[K] 185
15 AC:[Y] 62.5
16 AC:[Y] 125
17 AC:[M] 62.5
18 AC:[M] 125
19 AC:[C] 62.5
20 AC:[C] 125
G570
Mode No.
*
BCU
Function / [ Setting ]
Adjusts the DC component of the charge roller
bias in the various print modes.
Charge bias (DC component) is automatically
adjusted during process control; therefore,
adjusting these settings does not effect while
process control mode (SP3-125 Default: ON) is
activated. When deactivating process control
mode with SP3-125, the values in these SP
modes are used for printing.
[ 300 to 1000 / 700 / 10 volts/step ] DFU
Sets the upper limit of the AC component
adjustable range for black.
During machine initialization and process control
self-check, the AC component of the charge roller
bias is automatically adjusted within the range
specified by SP2-001-010 and 011.
[0 to 255 / 103 / 1/step ] DFU
Sets the lower limit of the AC component
adjustable range for black.
[0 to 255 / 97 / 1/step ] DFU
•
Displays the AC component of the charge
roller bias adjusted during machine initialization
or process control self-check.
•
Sets AC bias in the various print modes for
test purposes.
If the optimum AC bias cannot be selected
because of the upper and lower limits (SP2-001-
10 and 11 for K, SP 2-001-21 and 22 for YMC),
this may cause white spots on images and black
spots on background. (In particular, spots may
appear if the room temperature is very low.)
Check the printouts after changing the AC bias
with these SP modes (SP2-001-12 to 20) and
exiting SP mode. If increasing or decreasing the
AC bias for relevant color solves the spot problem,
shift the AC upper and lower limits (SP2-001-10
and 11 for K, SP 2-001-21 and 22 for YMC) by the
value increased or decreased during the test.
NOTE: The AC upper and lower limits have been
optimized by the manufacturer; therefore,
these settings should not be adjusted in
the field.
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 148 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
[0 to 255 / 71 / 1/step ] DFU
5-16 SM