Grass Valley NV8500 Series v.3.5 - Manual (Page 209)

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Maintenance
Routers in the NV8500 Series do 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.
It is recommended that the system’s indicator LEDs be checked on a regular basis to ensure that
the system is operating properly. It is also a good idea to regularly make sure cooling air flow to
the power supply fans is unobstructed.
Topics
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Obtaining Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Fuse Replacement
There are no user-serviceable fuses.
Indicator LEDs
Indicator LEDs indicate whether DC power is present and if a card is operating normally. LEDs
are visible when the router front door is closed. In the following sections, LEDs are listed in the
order they appear on the cards, from top to bottom.
Power Supplies
The five green LEDs on the front of the power supply modules indicate presence of the five +48
VDC outputs of the five branch circuits. All five LEDs should be lit at all times when AC power is
present. If any LED is off, either the power supply has failed or the branch circuit is shorted.
CAUTION
Only qualified service personnel should perform procedures in this section.