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Vega-MV Router Multiviewer - User Manual
Issue 1 Revision 2
Page 241
© 2017 SAM
Fault Identification and Basic Problem Solving
Trouble Shooting D.5
e)
Check chassis fuse is the correct rating. (See 5.5 “Vega-MV Power Supplies and
Fuses” on page 55 for fuse types).
Replace the chassis fuse if the original is blown or if it is not the correct rating.
Steps b) to e) above have checked the mains supply, cable and fuses.
The following steps assume that the AC mains supply, cable and fuses are all OK:
If the AC mains supply, cable and all fuses are OK, then continue with the following steps:
f)
If the
AC OK
LED is still OFF, then power cycle the unit a further two times.
(Do this by removing the mains cable and plugging it back in.)
After this, if the frame PSU still does not work, then
replace the PSU. (See Section 10.6 “Replacing a PSU module” on page 193.)
g)
If the frame enters a repeating power-up/shutdown cycle,
then the frame’s PSU is probably entering some protection mode.
Look for any obvious causes, for example, blocked cooling vents.
If the cause is not apparent,
fill out a
and contact your dealer or SAM Support for details
on how to proceed.
h)
If the PSU’s
AC OK
and
DC OK
LEDs are lit
and the front panel
P1
LED is Off:
Open the front panel; check the MV-NET card’s 'Hot swap’ LED (LED
D5
) is lit.
(See the note below about “Locating MV-NET card’s
D5
LED”.)
Record the
D5
LED status (Lit or Off) and fill out a
and
contact your dealer or SAM Support for details on how to proceed.
Note:
PSU protection:
The PSU has internal protection circuits which protect against: short circuit, current
overload, over-voltage and over-temperature.
None of these protection circuits should activate during normal operation.
For all conditions except over-voltage, the PSU recovers automatically when any fault
condition is removed.
For over-voltage, the PSU must be power-cycled in order to recover.
Important:
DO NOT quickly resort to replacing a PSU.
The PSU units are very robust and are unlikely to fail in a power-on/power-off cycle.
It is most likely that the PSU has entered a protection mode for some reason.
The underlying reason needs to be investigated.
Note:
Locating MV-NET card’s
D5
LED:
Look from the front of the chassis, back along the component side of the MV-NET card.
LED
D5
will just be visible towards the rear of the card, see
.