Vega-MV Router Multiviewer - User Manual
Issue 1 Revision 2
Page 243
© 2017 SAM
Fault Identification and Basic Problem Solving
Trouble Shooting D.5
D.5.4.3
Procedure 2 - Front Panel
P1
LED is RED or Flashing
The first indication of DC power supply problems will be via the front panel
P1
LED which
operates as follows:
•
P1
LED should always be on if the frame’s internal 24 V DC is available.
•
It will be lit Green if the detected voltage supplied is within the range of 20 V - 25.5 V.
•
It will be lit Red if outside of this range.
•
It will flash on and off if any on-board power supplies are outside their permitted
ranges then the LED will flash on and off.
•
If it is Off, then there is no frame DC supply or it is out of range.
See “2nd Stage, Fault Identification - Power Supplies” on page 236.
P1 LED Red:
If
P1
LED is lit Red, the most likely reason is a degraded DC output from PSU.:
1.
Open the front panel and check the two LEDs on the front of the PSU.
The
AC OK
LED on should be lit.
2.
If the
DC OK
LED is lit,
then frame’s DC supply voltage detected by the MV-NET card is in the range ~18 to
20 V DC.
3.
If
DC OK
LED is Off,
then this indicates the DC output from the PSU is less than ~18VDC.
A PSU providing a degraded DC voltage, even where the chassis appears to function
normally, will need to be swapped out as soon as possible.
P1 LED flashing:
If the
P1
LED is flashing, the most likely reason is that one or more of the on-board voltage
regulators of the MV-NET card has failed.
If the front panel OLED display is still active,
details about which voltages have dropped or failed will be displayed.
If the OLED is not working:
1.
Open the front panel;
check LED lit status for the MV-NET card’s 'Hi-power' LED (
D6, “HI_PWR”
) and
Note:
A “Low DC voltage” warning message will be displayed on the front panel OLED display,
while the DC supply voltage is high enough to power the front panel OLED display.
Note:
It is recommended that an MV-EXTPSU3 unit is plugged in to provide a secure supply for
the Vega-MV unit until the faulty PSU has been changed.
Note:
The MV-NET card houses a range of voltage regulators which provide DC power for
distribution around the chassis. For example, to power the fans, the OLED display, the
rears as well as MV-NET card functions.
In the unlikely event of any of these failing, the chassis will attempt to keep functioning, the
level of functionality dictated by which voltage regulator has failed.