Epson Perfection4180 Photo

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