Maintenance
VX1411 MainFrame Instruction Manual
6–15
H
Check the fuses in the mainframe and on the backplane.
H
Perform the procedures as described in Performance Verification beginning
on page 5–1 to verify the power supply voltages are present and within the
specified limits. If the voltages are not present, replace the power supply. If
any of the voltages are not within the specified limits, replace the power
supply.
Inadequate Cooling.
Cooling problems can be due to one or more of the following
problems:
H
Verify that the air filter is clean. If not, remove the air filter and clean it.
H
One or both fans may not be operating properly. Check that both fans rotate.
H
Verify that each fan is properly connected to the fan control board (see
Figure 6–3 on page 6–6).
H
Check that both fans are working at low and high speeds.
H
Verify that all of the IntelliGuides of empty slots within the mainframe
are closed when no modules are installed. If necessary replace the faulty
assembly.
H
Verify that each VXIbus modules have front panel that activates the
IntelliGuides (shutters).
Repackaging Instructions
If you need to send the VX1411 Mainframe to a Tektronix field center for repair,
attach a tag to the mainframe with the owner name and address, the serial
number, and a brief description of the problem(s) encountered or the service
required. Always return all accessories so that the entire system can be tested.
When repacking the mainframe for shipment, use the original packaging. If the
packaging is unavailable or unfit for use, contact your local Tektronix representa-
tive to obtain new packaging.
Theory of Operation
This section provides a brief overview of the theory of operation for the VX1411
Mainframe. Figure 6–10 shows the functional block diagram of the mainframe
and the major components.
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