Removal and Replacement
Maintenance
6Ć18
8. If you are removing the menu flex circuit, pull the circuit away from the
front of the main chassis.
9. If you do not need to perform componentĆlevel service on the frontĆpanel
assembly, skip to step 16 for reinstallation instructions.
10. Remove the frontĆpanel control knobs from the frontĆpanel assembly
using the method described in FrontĆPanel Knobs and Shafts on
page 6Ć11.
11. Release the three snap locks at the edge of the circuit board, then tilt
the board away from the assembly until it unplugs from J405. See
FigureĂ6Ć9.
12. Slide the circuit board out from the retainers found at the edge opposite
the snap locks and lift it away from the rest of the assembly.
13. Hand disassemble the frontĆpanelĆassembly components using FigĆ
ure 6Ć9 as a guide. Reverse procedure to reassemble.
Perform step 14 only if replacing a damaged ground spring.
14. Using FigureĂ6Ć9 as a guide, grasp (compress) the base of the ground
spring (to release the spring) with tweezers (ItemĂ7) and pull the ground
spring away from the assembly.
15. Reassembly of the FrontĆPanel Assembly: Do in reverse order substeps
14 through 10, reversing the procedure outlined in each step. Be sure to
dress the mainĆboardĆtoĆfrontĆpanel cable so that the loop of extra cable
length is in the frontĆpanel cavity of the chassis.
16. Reinstallation:
a. If you are replacing the menu flex circuit, perform the following
subparts:
H Wipe the front of the chassis using isopropyl alcohol and a
clean, lintĆfree cloth. Let it dry.
H Find the score line in the adhesive backing and peel the backing
off the menu flex circuit.
H Carefully align the three holes on the menu flex circuit to the
locator studs on the front of the main chassis. When the alignĆ
ment is correct, press the flex circuit against the chassis so it
adheres to the chassis.
H Clean the surface of the menu flex circuit using isopropyl alcohol
and a clean, lintĆfree cloth.
b. Reconnect the main board and menu flexĆcircuit cables to the back
of the front panel assembly.
c. Carefully reinsert the frontĆpanel assembly into the main chassis left
side first.
