Removal and Installation Procedures
6-36
TDS 420A, TDS 430A & TDS 460A Service Manual
ESD
Shield
Front Panel
Assembly
Menu Flex
Circuit
Probe Code
Flex Circuit
Press To Release
Snap Lock
Figure 6- 12: A06 Front-Panel assembly, ESD shield, and menu flex and probe code flex circuits removal
6. Remove the Probe Code Flex Circuit: If replacing or cleaning the probe code
flex circuit, remove the four T-15 TorxR screws, and lift the probe code flex
circuit away from the front of the main chassis.
STOP. Perform step 7 only if disassembling for cleaning and lubrication.
(Components removed in step 7 are not field replaceable.) Otherwise, skip to
step 8 to continue this procedure.
7. Further disassembly of front-panel assembly: If the front panel or the
front-panel buttons are to be serviced, do the following substeps.
a. Remove the front-panel control knobs from the front-panel assembly
using the method described in Front-Panel Knobs and Shafts on
page 6--23.
b. Release the five snap locks at the edge and center of the circuit board,
and then pull the board away from the assembly until it unplugs from
J405. See Figure 6--13.
c. Lift the circuit board away from the rest of the assembly.
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