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9
UF-7300/7200
UF-8300/8200
2.2.
SPC PC Board (Scanner and Printer Control)
2.2.1.
Engine Control ASIC (IC402)
(A) This block is the Serial Communication Interface with the Engine CPU (IC504).
(B) This block is the Stepping Motor Controller (CH1) to control the 2nd Paper Feeder Motor.
(B) This block is the Stepping Motor Controller (CH1) to control the 2nd Paper Feeder Motor.
(C) This block is the LSU Controller, and it consists of Laser Enable, Power Adjust and Video Data.
2.2.2.
Clock Circuit
The Printer system clock (12.00MHz) is generated by IC400 and X401, and it is supplied to the Engine CPU
(IC504) and ASIC (IC402).
(IC504) and ASIC (IC402).
The Scanner system clock (15.975MHz) is generated by X100 and the inner circuit of the Scanner CPU
(IC102).
(IC102).
nCS
SCLK
SDI
SD0
SCLK
SDI
SD0
SM1A
nSM1EN
nSM1EN
nLDEN
nADJUST
nVIDEO
nADJUST
nVIDEO
LD5VSW
nRST
nRST
VDD
VSS
GND
nTRST
VSS
GND
nTRST
(A)
(B)
(C)
Chip Select
Serial Clock
Serial Input Data
Serial Output Data
Serial Clock
Serial Input Data
Serial Output Data
Motor Clock
Motor Enable
Laser Enable
Laser Power Adjust
Video Data Output
Laser Power Adjust
Video Data Output
Power Supply Unit Detect
System Reset
System Reset
+5V
Engine CPU (IC504)
I/F
I/F
Stepping Motor
I/F
I/F
LSU I/F
IC402 (ASIC)
IC400 (Inverter)
1
7
X401
12.00 MHz
C407
C406
2
R402
C400
22
X0
IC504
(Engine CPU)
R404
6
3
CLKI
IC402
(ASIC)
R405
X100
15.975 MHz
C103
C101
15
13
XIN
XOUT
(Scanner CPU)
R104
R135
R136
IC102
R137
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