Grass Valley NV7512 v.1.3 - Manual (Page 109)

NV7512 Audio Router • User’s Guide 99
6. Maintenance
The NV7512 Audio Router does not require any periodic electrical or physical maintenance. Other
than cleaning the fan air intake filter, all that is required is periodic inspection of the system to
make sure no failures have occurred.
You may want to check the system’s Indicator LEDs (page 100) occasionally to ensure that the sys-
tem is operating normally and to make sure cooling air flow to the power supply fans is unob-
structed.
Periodic Inspection
Periodically inspecting the NV7512 for signs of trouble is the best way to prevent unplanned out-
ages. The following items will be helpful when performing this inspection.
Begin the inspection at the front of the frame. Open the door to the router and make these observa-
tions.
1 Check the +48VDC LEDs on the front of the PS6000 power supplies. An LED that is off or
very dim in brightness indicates a failed or failing supply.
2 Place your hand lightly across the air intakes on the front of the power supplies. Slight air
movement should be felt, indicating that the internal cooling fans are running. These fans run at
very low speed, so only slight air movement will be noticed. A flashlight may be used to verify
that the fan blades are rotating at the proper speed.
3 Look at each active card and verify that none of the red alarm LEDs are illuminated. Normally,
the green and/or amber LED's should be illuminated. Refer to Indicator LEDs on page 100 to
interpret the LED status indicators.
4 Look at the control card(s) and verify that the green and amber LED's are illuminated on the
active controller, and that the green LED is ON for the standby controller (if present). Verify
that the low battery LED is off on one or both control cards.
Indicator LEDs (page 100)
describes the various LEDs and their meaning.
5 Inspect the air intake filter located inside the door. If the filter is dirty or clogged, refer to the
next section for information on how to clean it.
6 Next, move around to the rear of the matrix frame. Ensure that there are no missing backplane
cover plates. Replace any missing cover plates to ensure proper cooling in the frame.
7 Place a hand near the air exhausts. Strong air pressure should be felt evenly across the entire
opening.
8 Check cable connectors for any sign of unseating.
Caution Only qualified service personnel should perform procedures in this section.