Ring Communications CB901EX - Manual (Page 23)

April 2012 Operations Manual CB901EX
POWER ON SYSTEM CHECK
NOTE: Always turn OFF the central power (NFE1528) before plugging the cards in or out of the cardracks.
A. Pull all NFE1625 cards out of the plugs (approx. one inch) except
the card in position No. 2. Test one card position at a time.
B. Plug the flat cable, which is connected to the BF901 mounted in the upper left
hand corner of the backplate, into positions 00 - 07 on the back of the cassette
motherboard.
C. Switch on main power.
D. Ensure that the standard programme is written into the memory on
the CPU Card PCB1019 when power is switched on. Set all switches to OFF in package SW2 .
E. Switch on the central power by operating the switch on the power card PCB1016
(in card position 1).
Any number of LEDs may light up. This is normal and they will extinguish after a few seconds.
Only a few LEDs will be indicating in accordance with the following list, starting with the
processor card to the left.
PCB1019 RUN LED will be ON
MASTER LED may be On or OFF
TX LED will blink
RX LED will blink only if external annunciator/DNA100 is connected
Battery Charge LED will be ON
NFE1607 No LEDs
NFE1521 No. 1 All LEDs stay dark
NFE1521 No. 2 The upper LED will be steady on
All the others will stay off
NFE1626 All LEDs stay dark
PCB978 All LEDs on all subscriber cards stay off
PCB1016 All four LEDs will be steady on
If these indications are not present, switch off power on the central power card and check that all
cards are properly pressed into the plugs on the motherboard. Switch on power again. If still not
normal, restart the system. Put switch no. 4 on switchpackage SW2 on CPU card PCB1019 in position
ON (network address 08). Press the Reset button (SW1, located on the edge of the card). This will
restart the processor manually. We will now assume that the indications are normal.
Make a call between, for example, the two stations in positions 00 and 01. They will have call
numbers depending on the number of digits selected in the system (SW3 on PCB1019)
This is the first check to see if the system is «alive».
Page 23 of 77
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