Read Sharp AL-840 (serv.man2) Specification online
(8) Scanning sensor
Type
Reduction optical image sensor (CCD)
Monochrome
D. Scanner (Exposure) section
(1) Type
(2) Resolution
Main scanning direction
Sub scanning direction
600 dpi
600 dpi
(3) Gradient
2 steps
(4) Details of Laser unit
Revolution
11,811 rpm
Number of mirrors
6
Laser power
0.35 mw
Laser beam size
75
×
65
µ
m
Laser wave length
785 nm
E. Imaging process section
(1) Imaging speed
50 mm/sec.
(2) Photoconductor (Drum)
Type
OPC (
φ
24 mm)
Life time
20,000 sheets
(3) Toner
Type
Developer cartridge color: black
Capacity/Life time
3,000 sheets (1,500 sheets with initially
installed cartridge) (A4 5% cover ratio)
installed cartridge) (A4 5% cover ratio)
(4) Charging
Method
Brush charging method
Voltage
DC-850 V AC 600 V (P-P)
(5) Transfer
Method
Transfer roller method
Voltage
DC+3.5 kV AC 600 V (P-P)
(6) Exposure
Method
Semiconductor laser method
(7) Develop
Method
Mono component non-magnetic method
Voltage
–310 V
(8) Separation
Method
Separation charger type/method
(9) Discharge (Japan only)
Method
Discharge brush type
(10) Cleaning
Method
By developing roller
Voltage
+200 V
F. Fusing
(1)
Method
Quick heat-up with pressure roller method
(2) Lamp
Type
Main unit
power supply
Voltage
Power
consumption
Halogen lamp
100/120/230 V
100/120/230 V
500 W
(3) Fusing temperature
Ready mode/
Print mode
Power save mode
Print mode (after
20th sheet in the
multi print mode)
20th sheet in the
multi print mode)
160°C
80°C
155°C
(4) Heat roller
Type
Teflon coated roller
(5) Pressure roller
Type
Silicone rubber roller
(6) Separation method
Forced separation by separation pawl
G. Power drive
Stepping motor (Main motor)
H. Engine control MCU (PCU)
Processor
CPU (H8S2350FP)
ASIC (HG73C025FD)
ASIC (HG73C025FD)
I. Image control (ICU)
Processor
ASIC (SLA303TF2B)
J. Memory
Type
Capacity
Contents
Location
DRAM
512 KB
Print data
ICU PWB
ROM
(EPROM)
(EPROM)
1 M bit
Program
MCU (PCU) PWB
DRAM
16 M bit
×
3
Copy image data
MCU (PCU) PWB
EEPROM
2 K bit
Control data
MCU (PCU) PWB
SRAM
32 K bytes
×
2
Line image data
MCU (PCU) PWB
RAM
265 K bit
×
2
Work memory
MCU (PCU) PWB
K. Interface
Type
Items
Operating system
IEEE1284P
Protocol
Peppy/Nibble
Data transfer speed
3 Mbit/sec (Max)
Connector type
—
L. Power supply
Type
Output
Voltage
Current
Notes
DC power
supply
supply
+24 V
+12 V
+12 V
+5 V
+3.3 V
2.0 A
0.13 A
1.1 A
0.25 A
High voltage
power supply
power supply
DC –310 V (+200 V)
DC +3.5 KV (AC 600 V P-P)
DC –850 V (AC 600 V P-P)
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