Cisco GS7000 Operating instructions

Troubleshooting
This troubleshooting section lists common problems and their solutions. If a troubleshooting procedure directs
you to replace a module of the node, see Removing and Replacing Modules.
•OIB, on page 1
•Troubleshooting the node, on page 2
OIB
There are 3 LEDs on the OIB, Heartbeat LED, Communication LED, and Power LED.
Communication
LED
Heartbeat LEDPower
LED
Condition
Normal behaviorSteady blinkSteady blinkOnNormal
Check power supply and power supply
voltages. Check cabling and that the
appropriate power shunts are installed in the
launch amplifier.
OffOffOffPower supply
fault
If Heartbeat LED and Communication LED
blink on power up and then stay off, problem
is with boot. Can be a device failure or
software is not loaded. Try cycling power.
Not blinkNot blinkOnError #1
OS is ok but node control software is not
running or is stuck. If this condition persists
for more than a minute or two after power
up, check all the cables connecting the lid
and launch amplifier. Try cycling power.
Not blinkSteady blinkOnError #2
This condition should not be possible unless
Heartbeat LED is damaged.
Steady blinkNot blinkOnError #3
Troubleshooting
1

Troubleshooting the node
SolutionProblem
• Verify that power is connected to the proper inputs and the powering
shunts/fuses are correctly installed.
• Verify that power supply is installed in the correct power supply slot.
• Verify that AC input power is within the operating range (45 to 90 VAC
rms).
• Verify DC outputs on power supply test points.
Node is not powered up
Check whether shunt fuse and node power supply module have been installed
correctly.
No power, all LEDs are
off
Software OS may be not boot up correctly, cycling power supply or press OIB
reset button using a hard slim object through the reset hole.
Only Power LED is on,
the other two LEDs are
off
• Verify that the ports are turned on with LCS.
• Verify input cabling and the RF input levels are as expected.
• Verify the Fwd RF cable between OIB and Launch amp is connected
properly.
• Verify iRPD is operating.
No RF output on one or
more forward RF ports
• Verify segmentation setting with LCS.
• Verify if there is RF port cabling and the RF input levels are as expected.
• Verify the reverse RF cable between OIB and launch amplifier is connected
properly.
No RF output on one or
more reverse RF ports
• Verify the RF configuration settings.
• Verify the USB cable connection in LCS.
AGC does not lock
Troubleshooting
2
Troubleshooting
Troubleshooting the node

SolutionProblem
Check whether the USB cable connect correctly and refer to Cisco GS7000 Super
High Output Intelligent Node Software Installation and Configuration Guide to
see whether USB connection mode on mobile phone has been configured correctly.
Can not control with LCS
software
• Check if the headend performance meets system design target.
• Measure level of RF input to RPD and check if the RF input level is correct.
Poor reverse C/N
performance
Look at the reverse path to determine which port(s) are noisy. Using max hold
makes it easier to see bursty noise signals.
Noise on reverse path
• Ensure RF cables are connected properly.
• Ensure that the diplexers match the installed splitter.
Poor frequency response
Troubleshooting
3
Troubleshooting
Troubleshooting the node

Troubleshooting
4
Troubleshooting
Troubleshooting the node