Ampro Corporation Littleboard 550 manual Northb

Chapter 2	Product Overview
CRT (J5)	CRT Fuse (F5) LCD 2 (J4) LCD 1 (J3)

L9

J5

J3

L8

F5

J4

Fan (J2)

J2

DIMM1

L3

Northb

L2

(U2)

r

i

DIMM1

CPU (U1)

dg

e

J18

LVDS (J31)

U34

Utility 3 (J18)

L5

J31

U10

E

t

h

e

U27

( r

U n

U21

5 e

J21

Audio In/

J1

U15

)

t

U26

Out (J28)

(U3)

E

t

Southbridge

U25

J28

h

Y5

e

r

( n

U e

6

t

01b

)

U24

U22

U4

Y1

LB550A_

PC/104-Plus

U33

(J21)

U17

U11

U16

J23

U20

U23

CompactFlash

JP5

U19

BAT1

Socket (J23)

JP6

Ethernet

U9

JP4

JP3

JP8

JP7

Port 2 (J32)

Parallel (J15)

J11

J7

J32

J15

J13

Ethernet

Floppy (J14)

U14

U12

U8

U7

Port 1 (J7)

J14

J17

Ethernet

Utility 2 (J24)

Grounding

J16

J12

J10

Pad

Utility 1 (J16) Primary IDE (J12)	Secondary IDE (J17)	Power In (J10) Board
Serial B (J13, Serial Ports 3 & 4)	Serial A (J11, Serial Ports 1 & 2)		Grounding
			Pad (8)

Figure 2-4. Connector and Fuse Locations (Top view)

CAUTION The two Ethernet ports share a common ground (transformer center tap), that is floating until you determine how the common ground is connected. The grounding holes (8) of the LittleBoard 550 are connected to ground potential (return) of the DC power supply connected to the board through J10.

NOTE	Pin-1 is shown as a black pin (square or round) in all connectors and
	jumpers in all illustrations.

LittleBoard 550 Reference Manual 13