A-6
Appendix A — Jetta Power Supply Information
8.
If this is the upper +5 volt supply in a redundant system:
a.
Place the two heavy black cables from the signal processor frame over the
LEFT power supply stud.
b. Place the two heavy red cables from the signal processor frame over the
RIGHT power supply stud.
WARNING
Note that the connections on the Jeta +5 Volt supply, referenced in Step 8, are
just the opposite of the connections that you removed from the Todd +5 Volt
supply. Note also that the studs, nuts, and cable ends for the positive (red)
cables are larger than those for the negative (black) cables, to prevent them
from being incorrectly connected. Connecting the cables incorrectly could
destroy portions of your power supply and/or switcher.
c.
Install the lockwashers and standoff studs that you removed from the
supply being replaced. Torque these studs to 80 inch pounds.
WARNING
Use caution when tightening the nuts. Insufficient torquing of the nuts may
cause overheating of the terminals which could result in fire. However,
excessive torquing of the nuts may break the studs.
NOTE:
New 14-1/4-inch black cables (P/N 051900-02) are required for the following
substep.
d. Place the two new black cables to the lower supply (dashed lines) over the
LEFT stand-off stud. See first WARNING above.
e.
Place the two heavy red cables to the lower supply (dashed lines) over the
RIGHT stand-off stud.
9.
Install the lockwashers and nuts, and torque the nuts to 80 inch pounds. See
second WARNING above.If this is a non-redundant power system:
a.
Adjust the power supply voltages as described in the Maintenance
Information in this Addendum.
b. You may now reinstall the covers on the rear of the frame, reconnect the
power source, and apply power.
10. If this is a redundant power system:
a.
You must replace the +5 Volt power assembly in the second Power Supply
frame by repeating the procedures described above.
b. When you have completed the installation (of both +5 Volt supplies),
reconnect the power source and apply power to both units.
c.
Before you install the rear plates on the Power Supply frames, you must
check the output voltages for load-sharing, as described in the
Maintenance Information in this Addendum.
Summary of Contents for Grass Valley 4000
Page 3: ...iii Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
Page 4: ...iv Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
Page 34: ...1 20 Section 1 System Overview ...
Page 138: ...2 104 Section 2 Installation ...
Page 196: ...3 58 Section 3 Functional Description ...
Page 286: ...Index 6 Index ...