Main system board diagram – Epson 4SX/25 User Manual
Page 3
EPSON Equity 4SX/25,4DX/33, and 4DX2/50
Main System Board Diagram
VGA video
parallel
serial 2
serial 1
mouse
keyboard
CN2
power supply
connectors
VGA feature
connector
s t a n d a r d
512KB
video
memory
<
o p t i o n a l
512KB
CPU chip
u21
socket
socket)
option board
riser card
connector
0000000000000000
0000000000000000
1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
FDD connector
HDD connector
1
1
1
I
”
u37
I
C
I
I
I
I
I
I
I
I
I
CPU
(PQFP)
U27
U38
TOSHIBA
- - 1
I
I
I
I
I
I
I
I
I
I
u 3 5
3
CN14 CN13 CN12
I
\
SIMM 1
SIMM0, 4MB SIMM standard
4/1/93
EPSON Equity-3