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Serial Port Header CN9
Front Panel Connector CN1
Audio Header CN15
IRDA Connector (CN4)
LED Panel Power Select JP6
LAN LED Header JP1, JP2
VCC5 1 2 VCC5
NC 3 4 NC
GND 5 6 PWRBTN
SPKR 7 8 KBLOCK
VCC5 9 10 GND
HDDLED- 11 12 NC
RESET+ 13 14 5V
GND 15 16 PWRBT-
DCD 1 2 DSR
RxD 3 4 RTS
TxD 5 6 CTS
DTR 7 8 RI
GND 9 10 5V
1 Line Out L
2
AU_GND
3 AU_GND
4 Line Out R
1 +5V
2
FIRTX
3 IRRX
4 GND
5 IRTX
3.3V (Default) 1-2
5V 2-3
Signal Pin# Signal
Link_LED 1 2 VCC_3V
ACT_LED 3 4 VCC_3V
Clear CMOS JP4
ATX Power Connector Block CN19
USB Port Header (CN11)
LCD Panel and Inverter Header CN10
Normal (Default 1-2
Clear CMOS 2-3
3.3V 11 1 3.3V
-12V 12 2 3.3V
GND 13 3 GND
PS-ON 14 4 +5V
GND 15 5 GND
GND 16 6 +5V
GND 17 7 GND
+5V 18 8 PWROK
+5V 19 9 5VSB
+5V 20 10 +12V
Signal Pin Signal
NC 1 2 NC
GND 3 4 GND
YA0- 5 6 YA1-
YA0+ 7 8 YA1+
GND 9 10 GND
YA2- 11 12 CLKA-
YA2+ 13 14 CLKA+
GND 15 16 GND
YA3- 17 18 YB0-
YA3+ 19 20 YB0+
GND 21 22 GND
YB1- 23 24 YB2-
YB1+ 25 26 YB2+
GND 27 28 GND
CLKB- 29 32 YB3-
CLKB+ 31 32 YB3+
NC 33 34 +12V
NC 35 36 +12V
NC 37 38 VCC_LCD
LCD_BKL 39 40 VCC_LCD
VCC 1 2 VCC
DATA- 3 4 DATADATA+ 5 6 DATA+
GND 7 8 GND
NC 9 10 Key
MX855
MX855
All-in-One Pentium M/ Celeron M socket 478Pin ITX Board
With LVDS FP, Audio out, 6 USB 2.0, 2 Gigabit Ethernet
User’s Quick Start Card
Version 1.0 http://www.bcmcom.com
Inspect the Package:
One MX855 Motherboard
One IDE Cable (80 Pins)
One Floppy Cable
One Audio Cable (Mini Jack)
One ATX I/O Shield
One User’s Quick Start Card
One Driver CD (Manual/Drivers)
One Custom CPU Heat sink
Responsibility:
This manual is provided “As-Is” with no warranties of any kind, it will neither expressed or implied,
including, but not limited to the implied warranties or conditions of this product’s fitness for any
particular purpose. In no event shall we be liable for any loss of profits, loss of business, loss of
data, interruption of business, or indirect, special, incidental, or consequential damages of any kind,
even the possibility of such damages arising from any defect or error in this manual or product. We
reserve the right to modify and update the user manual without prior notice.
WARNING: CMOS Battery Damage
Replace your system’s CMOS RAM battery only with the identical CR-2032 3V Lithium-Ion coin cell
(or equivalent) battery type to avoid risk of personal injury or physical damage to your equipment.
Always dispose of used batteries according to the manufacturer’s instructions, or as required by the
local ordinance (where applicable). The damage due to not following this warning will void your
motherboard’s manufacturer warranty.
ATTENTION: Incorrect BIOS Setup
If you do not know how to handle BIOS setup or how to set it up properly, it is strongly advisable
that you do not modify any of the settings than otherwise instructed in the User’s Quick Start Card.
Even a seemingly small incorrect adjustment or modification in the BIOS setup can render your
system unstable or unusable. The incorrect BIOS setup is not covered by your motherboard’s
manufacturer warranty.
Additional Information:
Additional information on setting this board up can be found in the User’s Manual in the provided
CD-ROM. The Online User’s Manual and FAQ/Knowledge Base can be found on our website by
visiting our website: http://www.bcmcom.com. If your question is not answered in our
FAQ/Knowledge Base, visit our forums and post your messages or submit a new FAQ through FAQ
Submittal form for us to add your question in our FAQ with our answer.
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PCI Slot
USB 4/5
LAN LED
IRDA
Primary/
Secondary
Front
Panel
ATX
COM 2
Ext. KB/
Mouse
CPU Socket
Floppy
System Fan
CPU Fan
Bus Speed
Select
DFP LVDS
Auto PWR-On
Line
Out
Motherboard Layout:
WARNING: Electrostatic Sensitive Device (ESD)
Static electricity can easily damage your motherboard and will void your motherboard warranty.
Keep the motherboard and other system components in their anti-static packaging until you are
ready to install them. Touch a grounded surface before you remove any system component from
its protective anti-static packaging. Unpacking and installation should be done on a grounded, antistatic mat. The operator should be wearing an anti-static wristband, grounded at the same points
as the anti-static mat. During configuration and installation touch a grounded surface frequently to
discharge any static electrical charge that may have built up in your body. Avoid touching the
components when handling the motherboard or a peripheral card. Handle the motherboard and
peripheral cards either by the edges or by the peripheral card case-mounting bracket.
WARNING: Misplaced Jumper Damage
Incorrect setting jumpers and connectors may lead to damage to your motherboard and will void
your motherboard warranty. Please pay special attention not to connect these headers in wrong
directions. DO NOT change ANY jumpers while the motherboard has the power!
System Front Panel Connector
CN21
Pin 1
KBLoc
k
VCC 5
VCC 5
NC
VCC 5
NC
GND
GND
PWRBT
VCC 5
NC
BUZZ
SPKR
GND
RESET
HDDLED
PC
SPEAKER
RESET
PWR
LED
PWR BT
HDD LED
KB Lock
Connectors
Socket/
Slot
Name Description Page
CN1
CRT VGA Port Front Panel DB-15C Female Connector
CN2
COM1 RS232 Serial Port DB9 Connector
CN3
Parallel Port Secondary IDE DB25 Connector
CN4
IRDA 5-pin Block (2.54mm pitch)
CN5
PS/2 Keyboard & Mouse 6-pin Mini DIN Connector
CN6
USB 2/3 & Gigabit Ethernet Port USB & RJ45 Connector
CN7
USB 0/1 & Gigabit Ethernet Port USB & RJ45 Connector
CN8
External Keyboard & Mouse Connector 5-pin Connector
CN9
COM2 RS232 Port Header 10-pin Block (2.54mm pitch)
CN10
DFP LVDS Panel Connector 40-pin Block (HIROSE DF13-40DP)
CN11
USB 4/5 Header 10-pin Block (2.54mm pitch)
CN13
System Fan Header 3-pin Connector
CN14
CPU Fan Header 3-pin Connector
CN15
Audio Line-Out 4-pin Connector
CN16
Secondary IDE 40-pin Connector
CN17
Floppy 34-pin Connector
CN18
CD_IN 4-pin Block
CN19
ATX Power 20-pin Block
CN20
Primary IDE 40-pin Connector
CN21
Front Panel 16-pin Block (2.54mm pitch)
Jumpers
Jumper Name Description Page
JP1 LAN 2 LED 4-pin Block
JP2 LAN 1 LED 4-pin Block
JP3 CPU Type Setting Select 2-pin Block
JP4 Clear CMOS 6-pin Block
JP5 Power On Setting Select 2-pin Block
JP6 LCD Power Setting Select 3-pin Block
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