To Replace An I/O Board - Electrolux W4400H Service Manual

144
To replace an I/O board
The procedure described here is for machi-
nes with more than one I/O board. On
machines with only one I/O board, that
board can be replaced without any need for
this procedure.
If there is more than one I/O circuit board, the
processor must know whether the new circuit
board is I/O board 1, I/O board 2 or I/O board .
For this programming you need:
1. A portable PC with Windows 98, NT, ME or
2000.
2. The correct cable for connecting the PC to
the CPU board.
. A service program for the PCU which you can
run on a PC. The program is called
G000" and can be used for numbering the
I/O boards correctly, amongst other things.
This program can be ordered from the supp-
lier.
Instructions:
1. Order a copy of the program
you do not have it already. Programs can be
supplied on diskette or via E-mail.
2. If you have not already installed it, install the
program "CMM
. Switch off the machine's main power switch.
Install the new I/O board and connect all the
PCB connectors.
4. Switch the machine's main power switch
7
back on. Connect the correct cable between
the computer (COM1 port) and the interface
connector X7 on the CPU board.
It is important to ensure that the PCU is en-
ergised and running before you connect
the cable to interface connector X7.
Programme unit
"CMM
"CMM G000" if
G000" on your computer.
7
X5
5 4  2 1
CPU circuit board
X7
972