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NV8500 family Digital Routers • User’s Guide
101
5. Maintenance
Routers in the NV8500 family 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. (See
on page 101.) It is also a good idea to regularly
make sure cooling air flow to the power supply fans is unobstructed.
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.
Backplanes
Each backplane has indicator LEDs. If the red LED on the backplane lights, the card and backplane
do not match. If the green LED on the backplane lights, the card and backplane are a correcting
pairing. (See
Caution
Only qualified service personnel should perform procedures in this section.
Summary of Contents for NV8144
Page 10: ...x Rev 2 2 27 Mar 10 Table of Contents ...
Page 56: ...46 Rev 2 2 27 Mar 10 1 Introduction Frame Expansion ...
Page 104: ...94 Rev 2 2 27 Mar 10 2 Installation Verification ...
Page 106: ...96 Rev 2 2 27 Mar 10 3 Configuration ...
Page 110: ...100 Rev 2 2 27 Mar 10 4 Operation Setting Redundant Crosspoint Switching ...
Page 116: ...106 Rev 2 2 27 Mar 10 5 Maintenance Obtaining Service ...
Page 124: ...114 Rev 2 2 27 Mar 10 6 Technical Details Time Code Specifications ...
Page 128: ...118 Rev 2 2 27 Mar 10 7 Part Numbers ...
Page 140: ...130 Rev 2 2 27 Mar 10 Index ...