MV-32/64 Multiviewer
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Trouble Shooting
Issue 1 Rev 11
Page 127
© 2014 Snell Limited
Appendix C. Trouble Shooting
C.1 Problem solving
The P1 power LED will illuminate green whenever mains power is supplied to the internal
PSU of the multiviewer. The P2 power LED will be illuminated when 24 Volts DC power is
being supplied to the multiviewer by either the internal PSU or the external MV-Power PSU
(see section 3.7 for details on the MV-Power backup PSU).
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 MV-Power 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. The dual MV-32/MV-64 multiviewer frames are fitted with a second
CPU located in the center position. Should any of the seven LEDs not be illuminated, a power
rail failure is indicated, as per the table below (details should be reported to your Snell dealer).
Note:
A PSU on/off switch is located to the right hand side of the PSU, accessible when the front
door is open.
LED Position1 to 9
(from top)
CPU Buffer Board LED Function (all should be illuminated)
4
+24V Present (same as front panel P2 LED)
5
+24V PSU (same as front panel P1 LED)
6
+5V-1 Redundant 1
7
+5V-2 Redundant 2
8
+5V General
9
+3.3V Local
10
+2.5V Local
Table 77.
LED Functions.