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1 2 Adjustments
55000-00011_002_01 – 1756789 – 2017-09-06
74
Figure 39
12.7
Adjusting the brake force of the friction
brakes
If the boom, spring arm, convenience bracket or the light head
do not remain stable in the position to which they are rotated,
the braking force of the friction brake must be adjusted.
The friction brake acts through the friction force of the
adjustment screw (slot-head screw (3)) on the relevant pin of
the support arm components.
If the braking force of several support arm components needs
to be adjusted, the brakes must be adjusted in the following
sequence:
1. Friction brake A for boom;
2. Friction brakes B for spring arm;
3. Friction brake C for convenience bracket;
4. Friction brake D and E for the cardan joint light head;
Screw types for the friction brakes
The brake screws are slot-head screws:
All other types of screw must not be loosened.
12.7.1 Disconnecting the power to the lighting
system
Ceiling-mounted and wall-mounted versions
1. Switch off the operating theatre master switch.
→ The lighting system is disconnected from the power
supply.
2. Secure the master switch against accidental switch-on.
Mobile stand version
1. Switch off the power supply unit, position the switch in
Position
0
(see Chapter 6.3.1, page 46), pull the mains
cable out of the safety socket.
→ The mobile lighting system is disconnected.
2. Secure the mains plug against unintentional plugging-in.
12.7.2 Adjusting the braking force for the boom
Adjusting friction brake
A
:
1. Adjust brake screw ① with a suitable slot-head
screwdriver:
Reducing the braking force
• Turn the adjustment screw to the left (anti-clockwise).
Increasing the braking force
• Turn the adjustment screw to the right (clockwise).
2. Carry out a function test of the braking force.
Brake screw type: 1378864
ATTENTION