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EPSON Perfection4180 Photo
2.2 Operation Principle of Electric Circuit
The following electric circuits are used in the scanner.
Main Board
Table 2-1. Main Board IC
Name
Location
S1R77001F00A2
IC4
S1R720G0F00A0
IC6
K4S641632F-TC1H0D0
IC3
TB62205F
IC1
uPC37M32
IC2
MM74HC595M
IC5
CCD Board
Table 2-2. CCD Board IC
Name
Location
ILX183K
IC1
AK8416
IC7
E02A41YA
IC8
SN74ACT244NSR
IC3, IC4
74HCT4053PW
IC5
KIA78M05F-RTF/P
IC2
Panel Board
This board has four buttons (Start/Copy/Scan to E-mail/Scan and Save) and LED
lamp.
OPERATING PRINCIPLES
Details
ASIC: Host base scanner controller
ASIC: UTM (USB2.0 interface)
SDRAM 1M x16bit x4bank
Motor Driver + DC-DC converter CR Motor Drive
+24V IN, +12V/+5V OUT
DC-DC converter
+5V IN, +3.3V/+2.5V OUT
Serial-Parallel converter
Details
CCD
16bit A/D converter
ASIC: CCD/AFE drive signal generator
CCD drive buffer
CCD drive buffer
DC-DC converter
+12V IN, +5V OUT
Operation Principle of Electric Circuit
Power supply
The scanner supplies DC voltage (+24V) from the AC adapter.
AC adapter rated voltage
Rated output
•
Input Voltage
•
Rated Input Current
•
Input Frequency Range 50 to 60Hz ± 0.5Hz
•
Output Voltage
•
DC voltage (+24V) is supplied to the Main Board CN4. A power switch is located
between the DC jack and the Main Board.
ADF Board (Option)
Table 2-3. AFD IC
Name
Location
M54670P
IC2
MM74HC165M
IC3
M66311FP-250D
IC1
MM74HCT04M
IC4
Revision A
DC24 1.4A
AC100-120V ± 10% (100V)
AC220-240V ± 10% (200V)
0.8A (AC 100V system)
0.4A (AC 200V system)
DC24 to 26.4V
Details
ADF Motor driver
Parallel-Serial Converter
Serial-Parallel Converter
Buffer IC
22
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