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TB147 Rev1 Installing An Aaeon PCM 6890B In An M400
Overview
This document describes the procedure for installing the Aaeon PCM 6890B motherboard in an M400
console This motherboard is a replacement in systems that have an Acrosser motherboard and an NEC 10 4"
LCD screen Below you will find a list of all the components that you should have received with the Aaeon
motherboard
1 Aaeon PCM 6890B Motherboard complete with CPU and memory
2 Heat sink fan w/ mounting bracket and 2 sets of 3/4" and 1/4" standoffs
3 LCD descrambler card LCD_DES 020703 50 Pin
4 50 pin LCD cable
5 ATX Power Supply
6 Aaeon Hard Drive cable
7 Aaeon Keyboard and mouse cables
8 Ethernet Cable
9 Misc power extension cables
Also you will need to retain the following parts from the M400 for use with the Aaeon motherboard
1 Floppy Drive cable
2 LPT1 cable
3 Serial cable
4 ATX power supply if fitted
Installation
The first step in the installation process is to remove all of the old components You must remove the old
motherboard assembly complete with CPU memory and heatsink You must also remove the old LCD
descrambler card and LCD cable You will no longer need the existing Ethernet cable mouse cable keyboard
cable or hard drive cable If the power supply is not of the ATX type then you will also need to remove it This
document contains the recommended installation procedure Follow it exactly to avoid any problems If there
is any confusion over any of the instructions please refer to picture 1 of an Aaeon pic 1 shows each of the
cables their labels as well as the connection of pin 1 Picture 2 shows proper installation of fan and bracket
and picture 3 shows an Aaeon installed in M400 console
1 Install the Aaeon motherboard in the M400 on the existing motherboard standoffs
2 Attach the new 50 pin LCD descrambler card to the LCD screen using the existing screws and standoffs It
is important that you use the new LCD descrambler card failure to do so will damage both the motherboard
and LCD
3 Install the LCD cable; one end connects to the descrambler card and the other to CN10 on the
motherboard It is vital that the red stripe on the cable is attached to Pin 1 at each end On the motherboard
Pin 1 is towards the edge of the motherboard nest to the Ethernet socket When routing the LCD cable you
want to make a 45 degree bend right after the LCD connection on the motherboard Then run it out over the
RAM and fold the excess in half and slide it between the LCD screen and the metal plate under the
motherboard
4 Attach Hard Drive cable to CN6 on the motherboard and the other end to the hard drive This cable should
be keyed If not the red stripe goes to Pin 1 which is towards the CPU Socket CPU1
5 Attach old floppy drive cable to CN17 on the motherboard it is also keyed
6 Attach old serial cable to CN16 This socket is not keyed; pin 1 is marked by the red stripe must be aligned
with pin 1 on the motherboard end Pin 1 on CN16 is next to CN17
7 Attach old LPT1 cable to CN14 on the motherboard This socket is keyed and can only go one way
8 Connect new Ethernet cable to CN15 on the motherboard
9 Plug ATX power connector into CN9 It will only plug in one way
10 Connect the new keyboard/mouse cable to CN11 It will only connect one way The keyboard cable plugs
into the 4 pin connector on the back of the M400 Keyboard
11 After all cables are installed you will carefully need to route all the cables so that they do not obstruct the
CPU7 The LCD cable can be routed up and over the RAM You will only need to make one fold in the cable
as shown in picture 3 Extra care must be taken with the ATX power connector so that is does not interfere
with the bottom of the CPU7 card A picture of an Aaeon installed in an M400 with the cables routed as
suggested can be seen in picture 3
12 If the M400 was not fitted with an ATX style power supply then you will have to drill new mounting holes
for the new ATX power supply When you mount it be sure that it will not obstruct any fans or vents on the
back and that the back panel will mount up squarely
13 Use the 3/4" standoffs instead of the 1" standoffs on the side of the motherboard closest to the bottom of
the console Then mount the bracket and fan on these standoffs with the fan pointing down towards the front
panel of the console Now place a set of 1/16" spacers on top of the bracket and secure the bracket by
installing the 1/4" standoffs See pic 2
14 Re install the CPU7; you may need to use 1/16" spacers on the top and bottom of the 1" standoffs used at
the topside of the motherboard
15 After powering on the M400 you may need to go into the CMOS setup to change the LCD screen
resolution To do this hit the DEL key on the keyboard when the control does the Memory check Go into
STANDARD CMOS SETUP Change the PANEL type to 640x480 18 Bit You must change the HALT option
to ALL BUT KEYBOARD
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Picture 1 Aaeon with cables inserted correctly
Picture 2 Correct installation of fan and bracket on the motherboard
Picture 3 Aaeon motherboard installed in an M400
Notes
1 Ensure that the LCD Descrambler card and cable are correctly inserted shown in picture 4
2 Check that the CPU7 has enough clearance above all the cables on the motherboard especially the ATX
power cable
3 If the CPU7 is not inserted all the way into the socket on the motherboard then you may get a 64180
Timeout not responding error message
Picture 4 Aaeon motherboard LCD Descrambler card
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Document History
Rev1 Created on 2002 08 08