Read Panasonic UF-490 / UF-4000 / UF-4100 / UF-490YC / UF-490YR Service Manual online
10
1.1.3.
Scanning Circuit
1. Scanning LSI
MN860741 (IC18) is a Scanning LSI which generates Shading Correction, MTF Correction, Reduction/
Enlargement, and Gray Scale Error Diffusion. The Image Signal is converted to binary signal and
transported.
Enlargement, and Gray Scale Error Diffusion. The Image Signal is converted to binary signal and
transported.
2. TX/RX Motor Drive Circuit
Single Motor is used for TX/RX, which is controlled by Motor Drive Chip SMA7029M (IC26).
Gray Scale Data
(PC Scanner)
SC (DZEP000602)
Binary Data
(Copy,
Communication)
(Copy,
Communication)
Scanning Circuit
MN860741(IC18)
CIS
IA2008-MA30C (A4)
or
IH2010-MB51B (B4)
TX/RX
MOTOR
SMA7029M
(IC26)
Scanning Data
Output
To Memory (IC6)
White
Shading
Correction
Reduction/
Enlargement
CN12
CN3
PNL (DZEP000601)
uPD780022A
(IC2)
Serial I/F
B4 WIDTH SENSOR
ORIGINAL DETECTION
SENSOR
CN51
CPU V850
(IC1)
3 -> 5V
5 -> 3V
SHINE (IC3)
READ POINT SENSOR
CN5
Variable
Resistance
Binary
Error
Diffusion
Gray Scale
Black
Shading
Correction
S/P
Converter
DMA
Controller
S-DRAM
Controller
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