I.
Lift the front of the Side board up until it clears the
retaining latch and then pull the board forward, until it
clears the channel notch at its rear edge, to complete the
removal.
k. Remove the mounting screw (center of the Side
board) securing the Side board to the Main chassis.
j. Rotate the black retaining latch (near the front of the
Side board) 1/4 turn counterclockwise to unlock it.
i.
Rotate the Top chassis back to the normal (installed)
position. Using a 7/32 inch nutdriver, rotate the two retain-
ing latches 1/4 turn clockwise to temporarily secure it to
the instrument.
h. Disconnect the ribbon cable connector from J102 at
the right front corner of the Low Voltage Power Supply
board and route the cable to the outside of the instrument.
g. Perform parts j through I of Step 4 to access the
inside of the instrument.
f. Disconnect the ribbon cable connector from J150 of
the Side board.
e. Disconnect the ribbon cable connectors from J121 of
the Timebase/Display board and J120 of the Processor
board. The two connectors are attached to the same rib-
bon cable.
d. Disconnect the ribbon cable connectors from J100
of the Timebase/Display board and J103 of the Processor
board. The two connectors are attached to the same rib-
bon cable.
c. Disconnect the ribbon cable connectors from J111
and J141 of the Main board.
b. Set the instrument on a flat, smooth surface with
the Side board facing up and the Front panel facing
forward.
6. Side Board Removal
a. Perform Step 1 to remove the cabinet from the
instrument.
6-20
Reverse parts a through p to install the Main board.
m. Lift the board up from the instrument and back
from the Front casting to complete the board removal.
I. Remove the two mounting screws securing the Main
board to Main chassis.
k. Disconnect the flex cable connector from J114 and
the two retaining latches. J114 is located in left-rear corner
of the board.
j. Using a 7/32 inch nutdriver, rotate the seven black
retaining latches 1/4 turn counterclockwise to release
them.
When installing the extension shaft to the Power
switch, push the small shaft to put the switch in the
IN position. Insert the shaft into the Front casting,
align the extension shaft to the small shaft, and
push the button end of the switch until the two
shafts are coupled.
NOTE
i. Grasp the large extension shaft near where it joins to
the small shaft of the power switch and pull it upwards
from the Main board to disconnect it. Lift up and back
(towards the rear of the instrument) to remove the exten-
sion shaft from the Front casting.
h. Remove the screw securing the end of the Power
switch's extension shaft to the Front casting.
g. Disconnect the cable connector from J107, located
near the right-rear corner of the board, and from J106,
located near center-front edge of the board.
f. Disconnect the three ribbon cable connectors from
J111, J113 (TV Trigger option only), and J141 at the left
edge of the board.
e. Disconnect the two flex cable connectors at J104
and J108, and the ribbon cable connector at J105. J104,
J105, and J108 are located near the right-front corner of
the board.
Maintenance-2430 Service
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