Canon iR1600 Series, Руководство по обслуживанию

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CHAPTER 2 BASIC OPERATION
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
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g. Memory Function
1. Non-Fax Model
The SDRAM possessing 16MB of memory (as mounted) is capable of storing image
data equivalent of as many as 200 sheets (about 3.2 MB; A4; with print ratio of 4%).
The 128KB SRAM is used to store settings data (user data, service data), and is backed
up by a lithium battery (BAT1; as long as 5 years with power removed).
The image memory may be expanded by adding a 32MB RAM DIMM.
2. Fax Model
The 16MB (actual) SDRAM designed for the storage of image data is capable of stor-
ing image data equivalent of about 100 sheets (2MB ; A4 ; with print ratio of 4%).
The memory is backed up by a vanadium lithium battery (BAT2) so that its contents
may remain intact for as long as 1 hr. The 128KB SRAM is used to store various registra-
tion data (i.e., user data, service data), and is backed up by means of a lithium battery
(BAT1), capable of backing up the contents for as long as 5 yr.
The image memory may be expanded by adding the RAM DIMM (32MB x 2).
h. SEND Function (if equipped with a network board in fax models)
The SEND function uses a network to send image scanned by the reader unit to an ex-
ternal device.
i. Speaker
The machine allows the control of the sound generated by the speaker in response to an
error or button operation (on/off) and of the volume of the sound.
Memo
To control the volume of the sound, change the settings in user mode.
1.2.2 DC Controller PCB
a.Fixing Heater Control Mechanism
The fixing heater control mechanism monitors the readings of the thermistor mounted
to the fixing heater and the level of direct current from the power supply in relation to
voltage, thereby causing the temperature of the fixing heater to reach a specific level. It
also cuts off power to the fixing heater in response to an error in the heater temperature.
b. High Voltage Control Mechanism
The high voltage control mechanism is used to control the high voltage applied to the
primary charging roller and developing cylinder of the toner cartridge and the transfer
charging roller of the toner transfer assembly.
c. Drive Control Mechanism
The drive control mechanism is used to control the main motor, pickup solenoid, and
delivery fan.