Read Sharp AR-M550 (serv.man22) Service Manual online
AR-555/550/620/625 BLOCK DIAGRAM /
ブロック図
2 - 4
PCI Block ( ICU & Option)
System
Controller
IC700
420pin-BGA
PCI-Bus
ICU ASIC
IC25
304pin-QFP
PM1075
IC725
52pin-QFP
OSC
X2
71.233MHz
OSC
X5
64MHz
Scanner
&
Engine
I/F
CN8
LVDS
IC18
Buffer
IC8
SDRAM
IC27
32MB
CN9
SOFT-NIC
(100Base-T)
PM22-A IC721
162pin-QFP
PM22-B IC723
162pin-QFP
OSC X1
66MHz
FPGA
EPM
3064A
44pin-
QFP
Clock buffer
IC29
OSC X3
33.333MHz
IDE I/F
CN701
IDE Controller IC66
160pin-QFP
USB Controller
IC703 100pin-QFP
Bus Buffer
IC67,68,69
XTAL X701
24MHz
USB I/F
CN700
I/O G/A
IC32
240pin-QFP
PCIREQx
PCIGNTx
I/O Block ( EEPROM & Misc I/O )
I/O G/A
IC32
240pin-QFP
CN1
LVX161284
IC15
232C Driver
IC42
IEEE1284 I/F
CN14
RIC I/F (RS232C)
Scanner I/F &Engine I/F
LCX373
IC733,
735,737
IOA[17:0]
LDATA[15:0]
LCX245
IC734,736
IOD[15:0]
DIP-SW
RTC
NJU6356
IC40
OSC
X7
14.7456MHz
EEPROM
IC36
64Kbit
IOA[13:1]
IOD[7:0]
Switcher
5V
CN8
LCD
Controller
IC53
232C Driver
IC3
CN15
Debug I/F (RS232C)
TD62503F
IC38,41,719
OSC X702
8.5MHz
Switcher
3.3V
SRAM
IC55
2Mbit
IOA[17:0]
SW0,SW1
IOD[7:0]
ALE,ALE-H
System
Controller
IC700
420pin-BGA
Battery
Xtal
32.768kHz
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