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Service Manual
Third edition, June 1997
5.5 Signal Board, LCS
The Signal Board contains analog filters and an A/D con-
verter for the analog signal from the Transmitters.
5.5.1 Replacing a LCS
Note: In order to avoid ESD-damages (electrostatic discharge), do
not touch the components or the pins in the connector at the back of
the board.
1. Switch the power off before starting this operation.
2. Remove the two screws on the front panel of the board.
3. Push the knob down to loosen the connector at the back
of the board. See figure 5-4.
4. Enter the new LCS gently into the slots and push it
slightly so that it becomes flush with the other boards.
5. Tighten the two screws. Switch system on again.
5.6 Processor Memory Board, LCM
The Processor Memory Board processes the A/D converted
signals from the Signal Board and calculates ullages, tem-
peratures and IG pressures for all tanks. The Processor
Memory Board contains a processor, flash memory, database
memory, etc. It has inputs for ground failure alarm from the
Transmitter Interface. Each Processor Memory board can
handle up to 60 Transmitters.
5.6.1 Replacing the LCM
Note: In order to avoid ESD-damages (electrostatic discharge), do
not touch the components or the pins in the connector at the back of
the board.
1. Switch the power off before starting this operation.
2. Remove the two screws on the front panel of the board.
3. Push the knob down to loosen the connector at the back
of the board. See figure 5-4.
4. Enter the new LCM gently into the slots and push it
slightly so that it becomes flush with the other boards.
5. Tighten the two screws. Switch system on again.
6. Check that the correct software version is used on the
LCM. If in doubt contact Saab Marine Electronics.
7. Download the database from the Work Station to the
new LCM. See chapter 3.24.
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Figure 5-4. Removing a
board.