EPSON Equity 4SX/25,4DX/33, and 4DX2/50
Main System Board Diagram
VGA feature connector
s t a n d a r d - 512KB
video memory <
o p t i o n a l - 512KB
VGA video parallel serial 2
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| UlQ | U18 |
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| CPU chip |
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| u21 |
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| OverDrive | socket |
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| (ZIF socket) |
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| u37 |
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| TC6933ES |
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| U38 |
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| Ill | U3Q |
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| OrlnnlInn | ||||||||||||
,I |
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| CN17CNIS CN15 CN14 CN13 CN12 CNll | |||||||||||
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I \
SIMM 1 SIMM0, 4MB SIMM standard
serial 1 mouse keyboard
ELICN2
QQQ1
-
power supply connectors
option board riser card connector
CN 0000000000000000 - FDD connector0000000000000000
U,..a10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - HDD connector
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Iii nn
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| I ” | - - 1 |
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| I | CPU | I |
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0 |
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| I | (PQFP) | I |
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| I | U27 | I |
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Ia |
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II | I |
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| 2 |
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| 0 |
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| u 3 5 | u33 |
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4/1/93 | EPSON |