Rom Card Indications; Pcb Verification - Samsung DCS Installation Manual

Samsung DCS Part 4
Installation March 2001
The LED on the ROM pack will light steady and then start flashing to confirm the presence of power
and that the processor is running. The LEDs on the EXPN cards will light steady red to indicate the
presence of power and that the local processor is running.
If both KSU lights fail to light...
...unplug the system, disconnect the expansion cabinet power cords and HDLC cables and repeat the
test. If the LEDs on the ROM pack and EXPN-A card still do not light, unplug the system, remove
the power supply and check the AC fuse located on the bottom.
If the fuse is good but the LED does not light, you must correct the problem before continuing. Turn
off the power switch. Unplug all cards using the card ejectors. Turn the system on. Check the LEDs
again. If the problem is corrected, you have a defective card. Test the line and option cards one at a
time to find the defective card and remove the card before continuing. If the LEDs still do not light,
unplug the KSU and change power supplies. This should solve the problem. If it does not, contact
your dealer for advice.
If the LED on the EXPN-A card fails to light...
...switch the KSU off, unplug the HDLC cables and turn the KSU back on. If the EXPN-A LED still
does not light, replace the card and repeat the test. This should solve the problem. If it does not, con-
tact your dealer for advice.
If the LED on an EXPN-B card does not light...
...unplug and replace the HDLC cable. If this does not cure the problem, unplug and replace the
EXPN-B card. If the LED still does not light, unplug the system, remove the expansion cabinet
power supply and check the AC fuse located on the bottom.
If the fuse is good but the LED does not light, you must correct the problem before continuing. Turn
off the power switch. Unplug all cards using the card ejectors. Turn the system on. Check the LEDs
again. If the problem is corrected, you have a defective card. Test for and remove the faulty card be-
fore continuing. If the LEDs still do not light, unplug the expansion KSU and change the power sup-
ply. This should solve the problem. If it does not, contact your dealer for advice.

4.2 ROM Card Indications

After verifying proper operation of the power supply, visually check the ROM card indications.
The LED should flicker rapidly, indicating that the main processor is functioning.
The system is equipped with a halt program. When this program is running, the LED is ON steady.
The system must be reset to release the halt program and restore the system to normal operation. For
operation of the halt program, see MMC 810.

4.3 PCB Verification

Before connecting all MDF cabling, plug in a test cable to the first DLI card. Connect a display key-
phone and verify that it is working.
Use MMC 727 to verify the system version and software version, and to confirm that all cards are
recognised by the CPU.
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