Priority Switch (Only For Chairman Units) - Philips CCS 800 Service Manual

Delegate microphone permanently off when pressing the priority button at the Chairman unit(s) (RMO)
• Connect a Delegate and a Chairman unit to the CPSU.
• Set the Microphone switch of the chairman unit (see Priority button) in position 1.
• Press the microphone button on the Delegate unit. The light ring illuminates.
• Press the priority button of the Chairman unit. The light ring goes out.
• Release the priority button. The microphone and light ring of the Delegate unit stays off.
• Measure the DC-voltage for each step via M34 related to M8 (0V).
Microphone switch Priority button
position 1 on
position 1 off

10.3.8 Priority switch (only for Chairman units)

• Connect a Chairman unit to the CPSU.
• Press the Priority button at the Chairman Unit.
• The Light-ring must illuminate now.
• A chime tone will now be emitted depending on the position of the chime switch. This switch is accessible by
removing the cable relief bracket (0=no chime at priority, 1=chime at priority).
• Set the microphone switch (located near the chime switch) successively in position 0 and 1.
• Keep the Priority button pressed and measure the DC-voltage via M5, related to M2 (GND).
Mode switch Microphone switch
n.a. 0 = permanent OFF
n.a. 1 = temporary OFF
LBB 3310/00, 3330/00 and 3331/00
4822 861 11006
M34
< 0.5V (RMO is inactive)
> 4.0V (RMO is activated)
M5
> 13.35V (RMO activated)
between 8.7V and 10.11V (TRMO- is activated)
page: 31
SERVICE MANUAL
Date of issue:
July 1998