Toshiba e-studio555 User Manual

e-STUDIO555/655/755/855 © 2009 - 2011 TOSHIBA TEC CORPORATION All rights reserved
PROCESS RELATED SECTION
9 - 6
9.5 Drum Surface Potential Sensor Control Circuit
9.5.1 General description
The drum surface potential sensor measures the surface potential of the drum when the drum is
charged. Based on the measured value, this sensor controls the main charger grid bias voltage, and
thus can control the drum surface potential accurately.
9.5.2 Configuration
The configuration of this control circuit is shown below.
• Drum surface potential sensor:
Measures the drum surface potential.
• Control section (LGC board):
Calculates the main charger grid bias voltage to be applied when the image quality control is
performed, then controls the high-voltage transformer to adjust its bias voltage output.
• High-voltage transformer:
Generates and supplies the bias voltage of the main charger grid.
Fig. 9-4
Drum
Drum surface potential sensor
Main charger grid
IC58
Main CPU
IC27
NVRAM
IC56
ASIC
IC18
D/A
converter
High-voltage
transformer
Reference voltage: Vctr Digital data
LGC board
Adjustment value
DRV0-1A

Toshiba e-studio555 Specifications

Power

power supply	120 Volts; 20 Amps
power consumption	Maximum 2.0kW
warm-up time	Appx. 130 Seconds

Printing and Copying

copy/print resolution	2400 x 600 dpi
copy/print speed	55 / 65 / 75 / 85 cpm
print speed	55 / 65 / 75 / 85 ppm

Scanning

scan speed	80 spm LT-Size @300 dpi
scan resolution	150 dpi, 200 dpi, 300 dpi, 400 dpi, 600 dpi
file format	TIFF, PDF, JPEG, XPS, MS Word, MS Excel, Searchable PDF w/ Adv. Scanning option

Memory and Storage

memory	1GB RAM, 60 GB HDD
fax memory transmission	500MB (HDD)
reception	500MB (HDD)

Connectivity

connectivity	Ethernet 10/100BaseT, USB 2.0, 802.11b/g Wireless LAN, Bluetooth (HCRP)
protocol support	IPX/SPX, TCP/IP (IPV4/V6), EtherTalk, AppleTalk PAP, LPR/LPD, IPP w/Authentication, Port 9100
operating systems	Windows 2000/XP/2003/Vista/2008, Mac X OS 10.2.4/10.3/10.4/10.5, UNIX, Linux, CUPS

Weight and Dimensions

dimensions	28” x 31” x 46” (W x D x H)
weight	462 lbs
standard paper supply	2 x 500-Sheet Drawer; 2 x 1, 250-Sheet Tandem Drawer; 100-Sheet Stack Feed Bypass