Read Sharp AL-2020 (serv.man2) Service Manual online
AL-2040 ELECTRICAL SECTION 12 - 1
[12] ELECTRICAL SECTION
1. Block diagram
A. Overall block diagram
Carriage
U
nit
CCD
P
WB
12V
5V
NF
A5V
3
.3V
Reg
5V
SPF
Motor
(AL-2040
only)
Mechanical
Load
R
MPFS,RRS,CPFS1
G
8
bits
(MSB/LSB)
B
(Counter)
MCNT
5V
Sensor/SW
(Electorical
detector/SW/Sensor)
CPU
INTERRUPT
SPPD
PSW
MCU-PWB
FW
MHPS
CPU
I/O
Interlock
SW
Cassette
detector
X
2
Drum
Initial
detector
3.3V
PPD1
POD
MFD
PPD2
SPOD
Printer
C
LK
(18.3856MHz)
3.3V
Scanner
CLK(48MHz)
A[19…1]
OPE
PWB
D[15…0]
USB
I/F
1Mbit
16Mbit
Duplex
Motor
16bit
Fan
M
otor
I2C
B
us
(2speed,Lock
sensor)
8Kbyte
24V
12V
Main
Motor
Toner
M
otor
Mirror
Motor
Polygon
Motor
AC
Code
LSU
KRONOS
A
SIC
(296pin)
CPU
H8S/2321
(19.6608MHz)
EEPROM
SDRAM
16Mbyte
Reset
IC
SRAM
Driver
Flash
ROM
AFE
(HT82V24)
CDS
AGC
MPX
AD
16bits
CCD
D
river
CCFL
x
2
Lamp
Inverter
for
CCFL
HOME
POSITION
SENSOR
CCD
(ILX558X)
CPU
C
LK(19.6608MHz)
System
Reset
SSCG
PMD
Driver
LED
Driver
LED
HC151
x
2
KEY
Matrix
START
KEY
POWER
S
UPPLY
/POFF,HL,PR
FW
3.3V,5VEN,5V,12V,24V
HVU
TC,
G
RID,
MC,
B
IAS
PMCLK
PSW
KEYIN1,2
SELIN1,2,3
OP-CLK
OP-LATCH
OP-DATA
PSL
MHPS
Driver
/MMD
PWM
0-2
4
V
HC151
DC-DC
/MMRDY
LASER
MMCLK
USB1T20
PSL
LED
Driver
ONL
LED
ONL
Driver
NIC
PCBA
(AL2040
only)
RJ45
(N/W
connector)
Ether
Chip
RTL8019AS
FPGA
CPU
uPD703100
FlashROM
1Mbit
SRAM
256kbit
1284
I/F
USB2.0
FullSpeed
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