Maintenance
7–18
VX1410 IntelliFrame Instruction Manual
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 VX1410
IntelliFrame. Figure 7–12 shows the functional block diagram of the mainframe
and the major components.
The standard mainframe contains the following major components:
H
Power supply
H
Backplane
H
Standard Monitor board
H
Temperature Sense board
Power Supply.
The power supply provides all voltages and currents to the
mainframe. The power supply connects to the backplane at J1 and J2 through the
Power Supply Interface board. The power supply and the Power Supply Interface
board can be replaced as a single unit.
Backplane.
The backplane (A4) provides all the connections to module slots 0
through 12 in the mainframe. It also has connections to all other circuit boards
and modules in the mainframe.
The front panel On/Standby DC switch connects to one of two connectors at the
top of the backplane. When the switch is connected to J22, the switch controls
the power in the mainframe. When the switch is connected to J23, the power-on
functions are controlled by an external source through the 25-pin connector on
the Monitor board. Although the switch still illuminates when power is applied
to the mainframe, the on/off function of the switch is disabled. (Refer to Remote
Power Switch Configuration on page B–1 for information on powering the
mainframe with a remote momentary switch.)
The backplane connects to the Power Supply Interface board at J20 and J21. A
34-wide ribbon cable at 0J4 on the backplane connects to J16 on the Temperature
Sense board. Connectors 0J1, 0J2, and 0P3 carry instrument monitoring
information from the backplane to the Monitor board.
Standard Mainframe
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