Sharp SF-2014 Service Manual page 95

Purpose/kind Section
Adjustment Developer unit
Process
SPF unit
Setting Specifications
Main Sub
code code
25 2 (Operation/procedure)
After 3 minutes from start of stirring of the DV unit after the main motor
rotation, toner density is sampled 16 times during 8 sec, and the average
value is stored as the toner density reference value in the RAM.
With this reference value as the threshold value, the toner density is con-
trolled.
M.M
DV.Bias
(Note) Do not perform this simulation except for when replacing the developer
with a new one.
If this simulation is performed in the other case, overtoning or undertoning
may occur, resulting in a poor copy quality.
8 2 Used to check the voltage of the main charger and the transfer charger in the
manual and auto copy mode.
The main charger and the transfer charger unit are turned on for 30 sec in the
manual and auto copy mode.
3 Used to check the voltage of the main charger and the transfer charger in the
photo copy mode.
The main charger and the transfer charger unit are turned on for 30 sec in the
photo copy mode.
4 Used to check the voltage of the main charger and the transfer charger in the
manual and auto copy mode..
The main charger and the transfer charger unit are turned on for 30 sec in the
toner save mode. (manual and auto copy mode)
7 Used to check the separation charger voltage.
The separation charger unit is turned on for 30 sec.
9 Used to check the voltage of the main charger, the transfer charger, and the
separation charger.
The main charger unit, the transfer charger unit, and the separation charger
unit are turned ON for 30 sec.
48 3 Used to adjust the horizontal magnification ratio. (When the SPF is used.)
The adjustment is performed by changing the SPF scan speed (SPF motor).
(Operation/procedure)
When the simulation key operation is performed, the currently set value is
displayed on the COPIES SELECTED display.
Enter the adjustment value with the numeric key and press the print button,
and the value will be stored in the main PWB RAM.
It is required to make a copy and adjust. However, the rough input value can
be obtained from the following formula:
Input value = Currently set value + Copy magnification ratio x 10
Copy magnification correction rate = (Document length – Copy image length)
Document length x 100 [%]
26 1 Used to set options.
(Operation/procedure)
When the simulation key operation is performed, the currently set machine
number is displayed on the COPIES SELECTED display.
Enter the code number corresponding to the machine conditions and press
the print button, and the value will be set.
SF2014/2114
The code corresponding to the above is set.
(Note) Enter the code corresponding to the installed option. If a wrong code is
entered, a trouble may occur. (Refer to the self diag.)
Contents
Description
3mi n
SF2214 (SPF)
00 01
8 – 7
Ref. page
4-5
8sec 500msec
7-30
7-18