Bose PANARAY LT 9702 II Servis Kılavuzu - Sayfa 13

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DIAPHRAGM REPLACEMENT PROCEDURE

Note: Use a clean, well lit work area to

replace the diaphragm. The work area must

be free of magnetic materials that might be

attracted to the magnet in the compression

driver.

1. Rear Cover Removal

1.1 Carefully clean the outside of the

compression driver with a damp cloth.

1.2 Place the compression driver so the

rear is facing up.

1.3 Remove the three stainless steel

hexhead screws with a 5/32" hex wrench

by first loosening each screw one turn.

Then alternately loosen each screw until

they are removed from the rear cover.

1.4 Gently lift the rear cover straight up.

Set it down on its outside to keep the inside

clean.

2. Diaphragm Removal

2.1 Remove the black diaphragm assem-

bly by gently lifting and rotating it.

3. Compression Driver Magnet Inspection

Procedure

3.1 Examine the gap in which the coil of

the diaphragm sits by doing the following

steps.

A. Gently insert one end of a piece of

paper (approximately 1" x 1/2") into the

gap. Move the paper around the perimeter

of the gap. You should not feel any debris

or obstructions with the paper.

B. To remove the debris (if any) from

the gap, fold a piece of masking tap so that

both sides are sticky. Insert the tape into

the gap and work into and around the gap,

removing any debris. Check the gap with a

piece of paper. Once the gap is clean make

sure that there is no debris on the front

plate.

Note: If the gap is still not clean

replace the entire compression driver.

C. The front plate may have some small

smudges from fingerprints but there should

be no debris (from a shattered aluminum

diaphragm or any other source) and it

should feel smooth to the touch with no pits

in the metal.

4. Diaphragm Kit Replacement

4.1 Remove the replacement diaphragm

from its carton. Set it down so the coil is

facing up.

4.2 Grasp the diaphragm assembly around

its edges and gently place it onto the front

of the compression driver assembly.

Note: Take care not to damage the bobbin

as it comes in contact with the driver

assembly.

4.3 Slowly and gently rotate the dia-

phragm assembly so that the coil is worked

into the gap and the diaphragm assembly

rests smoothly against the front of the

compression driver.

4.4 Align the holes in the diaphragm

assembly with the holes in the compression

driver.

4.5 Place the rear cover back on by align-

ing the three screw holes and the three

post holes.

Note: Make sure the assembly fits together

flush, and the holes are aligned.

4.6 Place screw with lock washer into each

of the three holes. Tighten screws in this

order: clockwise with a torque setting of 5

inch-pounds. Counter clockwise with a

torque setting of 15 inch-pounds. Clockwise

with a torque setting of 25 inch-pounds.

4.7 Perform step 2 in the Disassembly/

Assembly Procedures.

4.8 Perform Test Procedures.