Sharp PC-4741 Service Manual page 5

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2. System Configuration
2-1. System block diagram
2-1-1. PC-4702
2-1-2. PC-4721/4741
1
1
ROM (64KB)
ROM (64KB)
RAM (640KB)
CE-452F
' I
5-1/4" . 360KS FOD
,-------,
Keyboard
LCD (640 X 400)
wlbackUght
t'C~:';7'1S'-'"
: MS-DOS ,
i_~~:~~~~~j
M,anuaJ :
IndIcates
options
; CE-471S
: MS-DOS •
i
_~~:~~_~I.~.:
Manual
Parallell/F : Printer :
(Centronics) ,
----~-._
•••• -.- •• ,
1
.t~~<?!'1.~~~~ _~~Iy! ~.
__ :.:. . . _____
>
Telephone line
:CE-462M Modem: ","
---~----:card
W/SIO
~---:-'.---.-:o- RS-232C peripheral
I/O
iSlot;::::::::::::::::: _:'
: or: CE4518
~---/;'--">RS-232cperipheral
----·i ....
~!<?_~~~~_
.. :
T
..... > RS-232C peripheral
.;;;
; , ~ ; - i : : ~~t~~~~;:;::,
- - -
~IT::·ttt;t:~;::
". CAT :
jMDA ............. .
1
i
or
:"CE471ii
........ : EMS 4.0 card ,
................ .
(1MB)
--.-.-.-.-------.-.---~
Indicates
options
-4-
! . -
~--.'
;'.,.