Diagnostics/ Fault Finding; Functional Test - Philips CCS 800 Service Manual

10.

Diagnostics/ Fault finding

10.1.1 Functional test

Before you start the functional test connect a correct working chairman unit and at least two delegate units to the
CPSU and switch on the CPSU
Testing the Light-ring
Put the mode switch in the TEST position
All the Light-rings of the delegate and chairman units must lit now
Testing the OPEN 1 mode
• In this mode maximum one delegate unit can be active at the same time.
• Put the mode switch of the CPSU in the OPEN 1 mode.
• Press the microphone switch on one of the delegate units.
• The microphone of the delegate unit is now activated, which is indicated by an illuminating indicator-ring.
• Press the microphone switch of the second delegate unit.
• This must have no effect. The indicator-ring of this delegate unit must stay off.
• Press the microphone switch on the chairman unit.
• The microphone and indicator ring of the chairman unit will be activated. This will have no affect on the active
microphone(s) of the delegate unit(s).
• Press the microphone switch on the first delegate unit a second time to switch off the microphone and indicator
ring. Do this also for the chairman unit.
Testing The AUTO 1 mode
• In this mode maximum one delegate unit can be active at the same time.
• The test procedure is the same as the OPEN mode with the exception that the microphone automatically will switch
off after a period of 30 sec. silence.
Testing the OVERRIDE mode
• Put the mode switch of the CPSU in the OVERRIDE mode.
• Press the microphone switch on one of the delegate units.
• The microphone of the delegate unit is now activated, which will be indicated by an illuminating indicator-ring.
• Press the microphone switch of the second delegate unit.
• The microphone of the first delegate unit and indicator ring will switch off and the microphone of the second
delegate unit and indicator ring will switch on.
Testing the CHAIRMAN ONLY mode
• In this mode only the microphones of the chairman unit(s) can be activated.
• Put the mode switch of the CPSU in the CHAIRMAN ONLY mode.
• Press the microphone switch on a delegate unit.
• This may have no effect.
LBB 3310/00, 3330/00 and 3331/00
4822 861 11006
page: 11
SERVICE MANUAL
Date of issue:
July 1998