Grass Valley NV5128 v.2.5 - Manual (Page 89)

NV5128 Multi-Format Router • User’s Guide 79
6. Maintenance
Replacing Modules
When you insert the new battery, be careful to observe the correct polarity.
Replacing Modules
Active cards, power supply modules and backplanes can be replaced or reconfigured in the router
frame. Whenever reconfiguring, be sure each active card has the correct corresponding backplane.
Active Cards and Power Supply Modules
All front-loaded active cards and the power supply modules (PS6000) may be removed or installed
with the power on (“hot swapped”). Prior to installing a replacement card, verify that user settings
are configured correctly. Cards that receive and process serial data from the control card will auto-
matically configure themselves at power up. If a card appears to be defective, first try re-seating it
in the frame.
Backplanes
All but the SWB input and output backplane and the SD input backplane are passive and may be
removed at any time. Use the same cautions as exercised with front-loaded modules. Be sure to
match backplanes to the corresponding front active cards. The backplanes housing BNC connectors
are especially easy to install in the wrong location because they look very similar. However, no
damage will normally occur from an unintentional mismatch.
SWB Input/Output and SD Input Backplanes
Unlike other backplanes, SWB input and output and SD input backplanes contain active circuitry.
Power to these modules is supplied by the associated active card installed in the front. To remove
one of these backplanes, first remove the front associated card containing the power supply cir-
cuitry.
Troubleshooting
Many system troubles are caused by easily-corrected errors, such as poor quality or missing input
or reference signals, incorrect configuration, and so on. This section lists common problems and
their solutions in the most likely order of occurrence. Refer also to the
Introduction on page 3 for an
Caution To prevent explosion of the battery and possible equipment damage or harm to
personnel, be sure the battery is oriented with the correct polarity. Polarity mark-
ings are visible on the card’s battery housing.
Caution When removing SWB output cards, be sure to remove the expansion output cards
(EM0465) before attempting to remove the main output card (EM0463). Other-
wise, damage to the connector “wing” assembly on the main output card may
occur.