MA lighting MA Switch, Repair Instructions

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Grand MA 5
6.7. If only the pneumatic spring is defective, replace it now by a new one. In this case,
the next step (6.8) can be omitted.
6.8. If the hydraulic trigger is defective, proceed as follows:
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Remove the yellow trigger knob. Holding the pin with pointed pliers, remove the
knob
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Close the lid and tilt the display panel upwards to max. 105° (see fig. 7)
Warning! Tilting the display panel over 105° may damage the electric cables in
the cable duct!
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Remove the 2 fastening screws of the trigger and replace the complete hydraulic
trigger for a new one Tighten the 2 fastening screws again
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Carefully tilt the display panel upwards.
Make sure that the electric cable duct
does not jam on the underside!
Then, tilt the lid upwards again and support it with the red rod.
6.9. Now, screw the pneumatic spring into the seat of the hydraulic trigger. In order to
adjust the travel correctly, proceed as follows:
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With one hand, screw the pneumatic spring into the trigger, and with the other
gently press on the trigger pin on the display panel. Screw-in the pneumatic spring
until the trigger pin has extended completely. Thereafter, turn back the pneumatic
spring for about ¼ turn. Tighten the pneumatic spring in this position, using a 17
mm nut.
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Rotate the yellow ball knob on the display panel until a travel of 10 mm is reached
6.10. Slide a new shrinkdown tube over the pneumatic spring and the tube.
6.11. As a trial, hang up the pneumatic spring and check the settings by moving the display
panel. With proper settings, the shrinkdown tube can be warmed up. Excessive heat,
however, can damage the tube.
Pay attention to the correct position of the hydraulic tube!
Then, check the pneumatic spring again by moving it forward and backward.
6.12. Secure the pneumatic spring at the fastening points using the cotterpins.
6.13. The rest of the assembly is to be carried out in the reverse order.
7. Replacing the power supply
7.1. Pull the mains plug.
7.2. Remove the 10 connecting screws between lid and bottom section all around the unit
from below.
7.3. Remove the 4 fastening screws of the power supply on the bottom side of the
housing.
7.4. Carefully tilt the lid upwards, support it with the red rod and disconnect the battery.
Warning: Do not tilt the lid beyond 90°! This could damage the plugs in the
unit's back panel.
7.5. Disconnect the electrical cables on the power supply.
7.6. Remove the heat sinks from the old power supply and mount it to the new one.
7.7. Reinstall the new power supply.