SERVICE MANUAL
LBB 3310/00, 3330/00 and 3331/00 page: 4 Date of issue:
4822 861 11006 July 1998
4. Ordering Service Information
Service publications of the Units are listed in: Survey of CSS Service Support information’ and are only for internal use.
Issued by: Customer Service & Technical Support CSS and can only be ordered by your local Philips organization.
5. Introduction
LBB 3310/00 Control and Power Supply Unit (CPSU)
The CPSU is the heart of the discussion system which controls the microphones of the chairman and delegate units as
well as providing facilities for audio inputs and outputs. It also supplies the power for the CPSU, chairman unit(s) and
delegate unit(s).
LBB 3310/00 D Control and Power Supply Unit (USA version)
Ditto with UL approvement.
LBB 3330/00 Delegate Unit
This unit provides the microphone, unit loudspeaker and headphones facilities for the delegates using the CCS 800
discussion system. The headphone connections are interconnected with the loudspeaker. When one or both headphone
connections are used and the microphone is not on, the loudspeaker is switched OFF. It has a protected loop-through
interconnection. In case of disconnection or interruption of the system cable to the next unit, the system cable will
automatically be terminated with the correct impedance.
LBB 3330/50 Delegate Unit with Long Microphone Stem
Ditto with a microphone stem of 480mm instead of 310
LBB 3331/00 Chairman Unit
This unit provides the microphone, unit loudspeaker and headphones facilities for the chairman using the CCS 800
discussion system. Pressing the microphone button always activates the chairman microphone. Pressing the priority
button will deactivated all active delegate units and activates the chairman’s microphone. Release of the button will
either leave them deactivated or activates them again (depending on the setting of the chairman unit). Pressing the
priority button may be indicated by a chime tone.
Further equal to LBB 3330/00.
LBB 3331/50 Chairman Unit with long Microphone stem
Ditto with microphone stem of 480mm.
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