Sierra Video View Multi-Viewer MV-XX - Manual (Page 81)

SIERRA VIDEO
75
Troubleshooting
Introduction
The power switch should illuminate red whenever mains power is supplied. Always
ensure that power is connected before using the problem solving guide. A spare fuse is
supplied in space provided in the IEC mains connector before the unit leaves the factory.
Always replace the fuse with one of the correct value as shown in the Installation section.
In the event of a power supply failure, there is both front panel and remote panel
indication. If installed, the optional POWER-xx external backup PSU is able to sustain
operation of the unit until while the internal PSU is replaced.
Remove the front panel and check the status of the power rail LED indicators on the front
edge of the CPU Buffer Board. This is situated immediately to the left of the CPU board
on the right side of the frame. Note that dual frames are fitted with a second CPU located
in the centre position. Should any of the nine LEDs not be illuminated, a power rail failure
is indicated, as per the table below (details should be reported to your Sierra Video
dealer).
Chapter 4
LED Position 1 – 9
(from top) CPU Buffer Board LED Function
(all should be illuminated)
1 +5V General
2 +24V External
3 +24V Internal
4 +2.5V Local
5 +3.3V Local
6 +3.7V Local (first supply to the +3.3V to provide redundancy)
7
+3.7V Local (second supply to the +3.3V to provide
redundancy)
8 +5V Redundant 1
9 +5V Redundant 2