Ricoh FW780 Service Manual page 390

SERVICE TOOLS
Mode No.
Bias Voltage for
Non-image Area
Setting
-21
Toner Density
Setting
-22
Toner Supply
Periods in Toner
-23
End Condition
Original Feed Motor
-24 Speed Adjustment
Original Repeat
Skew Check Mode
-27
B047/B048
Function
Determines the development bias
voltage for the non-image area.
In this mode, the bias voltage can be
turned on and off using the Copy
Media key.
Translucent paper = ON
Translucent Film = OFF
Selects the toner density setting. The
toner density changes according to the
copy length after the developer is
replaced.
Copy Length
Std.
(A4 size)
~ 30m
4.00V 4.35V 4.00V
(~ 50 sheets)
~ 60m
3.50V 4.30V 3.00V
(~ 100 sheets)
~ 90m
3.00V 4.25V 2.50V
(~ 150 sheets)
~ 120m
2.50V 3.75V 2.25V
(~ 200 sheets)
~ 150m
2.25V 3.25V 2.00V
(~ 250 sheets)
150m ~
2.00V 2.75V 1.80V
(251 sheets ~)
Selects the length of time that the
machine adds toner after clearing the
toner end condition.
Adjusts the speed of the original feed
motor (B048 copier only).
Used to check skew when printing
multiple copies (B048 only).
When using this mode to make
multiple copies, only the first and last
copies are actually printed. The other
copies are just scanned. By comparing
the two copies, you can check for
skew.
Procedure
1. Select 1 in this mode.
2. Exit from SP mode.
3. Select the manual feed and enter
the copy quantity to 3 or more.
4. Place the sheet on the manual feed
table and place the original on the
original table.
5. After all the copies are made,
change SP#-27 to 0 or turn the main
switch off and on. (This mode will be
canceled.)
4-16
4: Standard
0
Low
0: Standard
1: Low
2: High
Low High
0: 60 s
1: 70 s
2: 80 s
3: 90 s
–50
Faster
0.030%/step
0: Off
1: On
Data
8
4
High
50
0
Slower
SM