Service manual

3 - 1
1. Block Diagram
i550 Block Diagram
i850 Block Diagram
Serial
I/F
Power
Button
Resume
Button
Door
Sensor
ASF
Sensor
IEEE1284
I/F
ASIC
< KOUMEI >
SSCG
CPU
UDL
MASKROM
8Mbit
SDRAM
16Mbit
2Color
LED
PE
Sensor
MAIN PWB
USB
I/F
48MHz
SW401
SW402
SW403
X101
CN301
CN302
IC102
LED401
PS411
CN408
CN501
Tr
IC111
IC101S
Ink
Sensor
AMP
EEPROM
2Kbit
CR/LF
Motor
Driver
IC211
IC471
CN01
IC541
CN506
Temp
Sensor
TH1
DI
Sensor
EEPROM
CR
Encoder
PG
Sensor
LF
Encoder
FET
CR
Moto
r
LF
Moto
r
ASF
Moto
r
PG
Moto
r
HEAD Unit
CR PWB
CN201
CN202 CN02
CN507
CN504
CN505
CN503
CN502
ASF/PG
Motor
Driver
IC511
Tr
Tr
Power Unit
5v 19v 27v
Vcc VH VM
Vcc VH VM
2.5v 3.3v Resume
48MHz
Q222
VH
3/6MHz
5MHz
HEAD Unit
UART
Power Button
Resume Button
Door
Sensor
IEEE1284
I/F
SSCG
CPU
Block
IP
Block
MASKROM
8Mbit
SDRAM
64Mbit
2Color
LED
MAIN PCB
USB
I/F
REG in DC Dri.
48MHz
Ink
Sensor
AMP
EEPROM
2Kbit
CD
Motor
Driver
Temp
Sensor
Diode
Sensor
HEAD
CD-R
Sensor
ASF
Sensor
LF
Encoder
CR
Moto
r
LF
Moto
r
ASF
Moto
r
PG
Moto
r
CR PCB
Power Unit
5V 24V 27V
+5V VH VM PW CONT
3.3V 2.5V RESX
AD
USB
IP
EEPROM
CR
Encoder
PG
Sensor
CD-R
Moto
r
Guide
Sensor
PE
Sensor
Step
Motor
Driver
Motor
Driver