Auto-Toner Circuit - Toshiba e-STUDIO2500c Service Manual

12.4.4

Auto-toner Circuit

[ 1 ] General description
[ 1-1 ] Function of the auto-toner circuit
• Detects the toner density in the developer material for each color, and supplies toner when the den-
sity is lowered to a certain level.
• Detects that there is no toner left in the developer unit for each color.
[ 1-2 ] Configuration of the auto-toner circuit
• Auto-toner sensor (Y/M/C/K): Detects the toner density.
• Control section:
Controls each section to keep the toner density of the developer material constant.
• Control panel:
Displays a status that the toner cartridge is nearly empty.
• Toner supply section:
Toner is supplied from the toner cartridge to the developer unit by the toner supply motor in this sec-
tion.
Toner supply section-Y
Toner supply section-M
Toner supply section-C
Toner supply section-K
Toner cartridge
Toner
Developer material
e-STUDIO2500c/3500c/3510c DEVELOPER UNIT
Control panel
Touch panel
EPU board
Toner
motor
Auto-toner sensor
Developer unit
Temperature/humidity sensor
Control section
SYS board
IC10
LCD controller
IC32
ASIC
LGC board
IC56
ASIC
IC53
Engine CPU
A/D converter
Toner density signal
Control voltage signal
Fig. 12-6
12 - 8
IC13
System CPU
IC12
FRAM
North Bridge
IC39
NVRAM
IC41
IC76
ASIC
D/A
converter
IC72
A/D
converter
May 2006 © TOSHIBA TEC