Ricoh K-C3 User Manual

B245/B276/B277/B268/B269 Service Manual 18-Jan-06
248
Drive from the drum through a gear [D] turns the transfer roller.
Image Transfer Current Timing
There are two transfer current levels: low and high. The image transfer procedure is as
follows:
1. When the CPU receives the image writing start signal, the CPU instructs the
high voltage supply board to supply +10 microamperes (low transfer current
level) to the roller. This prevents any positively charged toner on the drum
surface from transferring to the transfer roller.
2. At a certain time after the low transfer current has been supplied to the roller,
high transfer current is applied to the roller to transfer the toner to the paper
(see the table below).
3. After the trailing edge of the paper has passed through the roller, transfer
current turns off. In multiple copy mode, the transfer current shifts again to
the low transfer current.
The high transfer current levels (default) are as shown in the following table. With SP 2301,
the high transfer current level used for the paper feed trays, duplex tray, by-pass tray, and
cleaning an be adjusted.
By-pass Tray
(Thick/OHP)
Paper Tray/
By-pass Tray
(Normal)
By-pass Tray
(Special/
Envelope)
Duplex
(2nd Side)
Duplex
(2nd Side)
A3/A4 LEF
11
A 12 A 13 A 12 A 17 A
DLT
12
A 18 A 15 A 18 A 17 A
B4 SEF
12
A 12 A 15 A 12 A 18 A
LT SEF
17
A 17 A 15 A 17 A 24 A

Ricoh K-C3 Specifications

General

Brand	Ricoh
Model	K-C3
Category	All in One Printer
Language	English