Service manual

AL-1651CS ELECTRICAL SECTION 12 - 1
[12] ELECTRICAL SECTION
1. Block diagram
A. Overall block diagram
Carriage Unit
CCD PWB
12V 12V
Reg
A5V 3.3V
R G
8bits(MSB/LSB)
B
SPF Motor
5V
Mechanical Load
MPFS,RRS,CPFS1
MCU-PWB
(SPF UNIT) SGS, SRRC, SPUS SPPS
AL Model Only 4Mb
or 8Mb (Counter) MCNT
256Mbx1 or 16Mb
3.3V
Sensor/SW
(Electronic detector/SW/Sensor)
UART
INTERRUPT
Printer CLK(16.1511MHz) SPPD
3.3V
I/O
Scanner CLK(48MHz)
16.1511MHz
12MHz Interlock SW
Cassette detector X 2 Drum Initial detector PPD1 POD
A[19…1]
OPE PWB
MFD
Duplex
Motor PPD2
D[15…0]
SDOD
1Mbit SPOD
PSL LED
Shifter Motor Note:
Energy-saving 1W correspondence)
8Mbit
8bit
I2C Bus 8bit 2Kbyte
Buzzer
Fan Motor (1speed)
MainMotor Toner Motor Mirror Moto
r
Polygon Motor
AC Code
KRONOS ASIC
(296pin)
CPU H8S/2321 (19.6608MHz)
LSU
EEPROM
SDRAM
16Mbyte
Reset IC
SRAM
Driver
Flash ROM
AFE(AD9826)
C D S
A G C
M P X
AD
16bits
CCD Driver
CCFL x 2
Lamp Inverter
HOME POSITION SENSOR
CCD
(uPD8861)
CPU CLK(19.6608MHz)
System Reset
SSCG
PMD
Driver
LED Driver LED
Copier 11 pcs
HC151
KEY Matrix Copier 24pcs
START KEY
POWER SUPPLY /POFF,HL,PR FW 3.3V,5VEN,5V,24V
HVU
TC, GRID, MC, BIAS
PMCLK
PSW
KEYIN
SELIN1,2,3
OP-CLK OP-LATCH OP-DATA
PSL
MHPS
Driver
Driver
/MMRDY
/MMD
PWM
0 - 24V
HC151
DC-DC
Image BUS(PI-Bus) Image BUS(PO-Bus)
OA982
SDRAM
Flash ROM
8 8
KEYSCAN1-3
ISP1581
USB2.0
High-speed
LCD
(2 x 20)
HC238
(3 to 8 decode)
EEPROM
(CRUM)
LCD E LCD RS LCD R/W(TBD) LCD DB7-4
Driver
LCX574
LASER
NIC PCBA
(Internal)
RJ45 (N/W connec tor)
Ether Chip RTL8019AS
FPGA
CPU uPD703100
FlashROM 1Mbit
SRAM 256kbit