Welch Allyn AudioScope, Руководство по обслуживанию

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4.1 Disassembly Procedure, AudioScope3
(continued)
4.1.4 Stabilizing Grommet removal *(sound tube gasket near lamp)
___ Slide the speaker boot off of the clip and pull the sound tube out of
the stabilizing grommet.
___ Peel the old grommet out of the ring at the end of the board.
___ Install new grommet by carefully pressing it into the ring.
___ Insert the sound tube into the stabilizing grommet and then slide the
speaker boot (containing the speaker) onto the spring clip.
___ Adjust the height of the sound tube so that approximately 1/8"
extends into the housing behind the lens. See Figure 2.5.4
___ Perform a leak check on the instrument after replacing stabilizing
grommet.
4.1.5 Printed circuit board removal
___ Unscrew two screws at the positive terminal end of the circuit board.
___ Pull the board towards the battery compartment and carefully lift the
board out.
4.1.6 Power jack removal
___ Unscrew jack ring nut with T-10912
___ Un-solder (using T19102-2) three connections on back of jack.
___ Remove jack from housing.
Reassembly
4.1.7 Install power jack
___ Put jack through hole in housing so that three tabs line up with
components.
___ Restore connections by soldering (using T19102-2) three components to
tabs on jack.
4.1.8 Place board into housing
___ Place the switch on the housing on the "off" position.
___ Place the switch mounted on the circuit board to the 40 dB position,
toward the yellow LED.
___ Position the sound tube gasket into the hole in head of the instrument.
The 5/16" round rubber ring will line up with the end of the fiber
optic bundle.
___ Gently push the board back into its original position. The tab of the
switch will engage the cavity of the switch button.