Removal and Installation Procedures
6-42
TDS 420A, TDS 430A & TDS 460A Service Manual
e. Push up on the left top tab lock on the trim ring and pull the left corner
of the trim ring forward slightly. (The left top tab lock is shown in
Figure 6--9 on page 6--31.)
f. Tilt the rear of the monitor assembly upward slightly. Slide the monitor
assembly back in the main chassis until it stops (about
3
@
4
inch). Now lift
it straight up out of the the top of the main chassis to complete the
removal.
g. While heeding the WARNING on monitor handling that immediately
precedes step 4 of this monitor removal procedure, store the monitor
assembly in a protected location. Place it face down on a soft, nonabra-
sive surface to prevent scratching the face plate.
5. Reinstallation:
a. Perform in reverse order 4a-4f, reversing the removal instructions in
each step and substep to reinstall the assembly. If the EMI clips on the
monitor are replaced, be sure to center them in the notched area of the
top and bottom of the chassis.
b. See the following procedures in the order listed to replace modules
removed by the access procedure:
H A06 Front-Panel Assembly, ESD Shield, and Menu Flex and Probe
Code Flex Circuits on page 6--35
H Trim Ring, Menu Elastomer, Menu Buttons, and Front EMI Gaskets
on page 6--31
H Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet
Handle and Feet (page 6--27) to reinstall the cabinet and rear cover
H Line Fuse and Line Cord (page 6 --26) to reinstall the line cord,
which completes the oscilloscope reassembly
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