Powering Up The System; Power Up Problems; Memory Led Indications - Samsung DS 616 Technical Manual

DS 616
TECHNICAL MANUAL

4.2 POWERING UP THE SYSTEM

• During the initial installation, disconnect the cables to the MDF.
• Verify that the battery switch is OFF.
• Power the system ON and check that the green LEDs for AC and DC
ON/OFF switch–See Figure 4–1)
steady to confirm the presence of power. If the AC LED is OFF and the DC LED is
ON, this indicates the system is operating off external batteries.
• Check that the RUN LED on the motherboard flashes within 10 seconds after power
ON. Set the BACK UP switch on the motherboard to ON

4.3 POWER UP PROBLEMS

If the PSU AC LED does not illuminate the problem must be corrected before
proceeding further with the KSU installation. Follow the steps below to isolate the
problem.
1. Turn OFF the switch on the KSU prior to doing any work on the system power
supply, remove the power supply cover and check the fuses
2. Power OFF the system and unplug all of the cards (option cards, trunk expansion
card). Power the system ON again. If the PSU AC LED now illuminates, one of the
cards is faulty.
3. If the PSU AC LED still fails to illuminate, replace the PSU. If the system still fails a
replacement KSU is required.

4.4 MEMORY LED INDICATIONS

Having verified proper operation of the power supply, check the motherboard LED. The
LED should flash rapidly indicating the main processor is functioning. The battery
switch should now be turned ON.
If the LED is not flashing after 10 seconds, power OFF the system and remove the SIO2
card and AA card (if installed). Power system back ON.
If the LED begins to flash, replace option cards, SIO2 and AA (if installed) one at a time,
until you determine which card is bad. (No LED/No Flashing LED) Replace that option
card (SIO2 or AA).
If LED does not begin to flash, replace the KSU.
Once the system is up and functioning properly, the memory backup selector should
be moved to the ON position
programming data as well as customer data in the event of a power failure.
on the power supply come ON. The LEDs will light
(see Figure 2–4). Failure to do so may result in a loss of
4.2
INSTALLATION
PART 4 JUNE 2002
(above the
(see Figure 2–4).
(see Figure 4–2).
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