4-32
Section 4 — Maintenance
Removing Control Panel Circuit Boards
To remove a circuit board assembly from the Control Panel, proceed as follows:
1.
Turn off the AC power at the switch located on the left end of the power
supply enclosure inside the Control Panel.
2.
Unplug the AC line cord from the AC source. The AC line cord is located at the
rear of the Control Panel.
3.
On the top of the Control Panel, remove any control knobs, lever arm T-
handles, etc. that would interfere with removal of the assembly.
NOTE:
If the lower right switch board is to be removed, the plug from the joystick/
positioner must be unplugged from the side of the board (under the top of the Control Panel
at the rear of the positioner) before lowering the board out of the Control Panel. It is not
necessary to remove the positioner to remove the switch board.
4.
Open the Control Panel and locate the circuit board to be replaced.
5.
Disconnect any cables or wiring that are attached to the board being removed.
CAUTION
Use care when removing cables or wiring to prevent the bending of connector pins
or damage to cable assemblies. Damage of this type can result in improper
operation or further damage to other circuit boards.
6.
If the board to be removed has a “piggy-back” mezzanine sub-module
mounted on it as in
, perform the following sub-steps. If not,
proceed to the next step.
a.
Disconnect interconnecting wiring, if any, between the main and
mezzanine board.
b. While supporting the mezzanine, carefully press in the tab on each
standoff to release it.
c.
Lift the mezzanine off and place it on a flat non-static surface.
Figure 4-17. Sub-Module Mounting Showing Standoffs
0347-04-34
Mezzanine
Standoff
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 ...