Grass Valley NV5128 v.2.5 - Manual (Page 90)

80 Rev 2.5 • 24 Sep 09
6. Maintenance
Obtaining Service
overview of the system and its major components. Try troubleshooting the system yourself, and if
you are not successful, call
Miranda Technical Support as explained near the front of this manual.
In the event that a problem is caused by a bad circuit board, swapping the bad board with a replace-
ment circuit board is the quickest solution. If you need to order replacement boards or other compo-
nents, see
Technical Support Contact Information on page iii.
Obtaining Service
For service advice, warranty exchange, warranty repair, or out-of-warranty repair:
1 Call Miranda Customer Support at the telephone number in the front of this manual under the
heading Technical Support Contact Information on page iii. Our Customer Service Personnel
will help you resolve any service issues.
2 If you need an exchange or repair, Miranda will assign you a Return Material Authorization
(RMA) number. Do not return equipment without first receiving an RMA number. Miranda
uses the RMA to track receipt of the equipment and to record repair or replacement informa-
tion.
For out-of-warranty equipment, the Miranda Technical Support Engineer estimates the cost of
repair when you call and requests a purchase order payable to Miranda .
Symptom Possible Causes and Solutions
System not powering up. Verify that the power cord(s) are plugged into the frame and the AC power
source. Use a voltmeter to verify the presence of power.
Check the AC line fuse on the power supply module. See
Fuse Replacement
on page 76.
One or a few PS6000 power
supply modules not
powering up or not
operating properly.
Check that the PS6000 is fully seated in the frame.
Reset the PS6000 by reseating it in the frame.
Check that all five green LEDs on the front of the power supply modules are
lit. If an LED is not lit, it indicates a branch circuit may be faulty, which could
affect only certain modules in the frame. Replace the power supply.
Check PS6000 fuses. See
Fuse Replacement on page 76.
Intermittent signal on one or
two outputs. Check input and output cable continuity.
Check AES Reference.
Check Video Reference.
Check cable terminations.
Possible bad card. Swap each card in the signal path with another card to see if
the problem moves with the card. If so, replace the card.
If all cables, terminations, and cards check out OK, call Technical Support.
(See
Technical Support Contact Information on page iii.)
Intermittent or missing
signals on all outputs.
Problems with the AES reference inputs could cause all inputs to operate
intermittently or not at all. Check the quality of the reference signals and their
cable connections.
Check the control card, which processes the references to produce sync. A
synchronous system requires an operational control card in order to pass
signals. An asynchronous system will operate in its last state even if the
control card is removed. Change over to the reserve control card to see if the
problem goes away.
Possible low voltage on power supply module. Check power test points on
power supply. Voltages at power supply test points may be slightly high in
lightly loaded systems. Replace the power supply if any test points indicate
low voltage.