Welch Allyn AudioScope, Руководство по обслуживанию

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4.1 Disassembly Procedure, AudioScope3
Caution : The battery and lamp become very hot during operation.
Allow ten minutes of cool-down time before opening unit.
Abstract: The Printed Circuit Board and power jack are easily removed from the
handle housings. The spring steel charger well contacts on the handle are spring steel
and will snap when attempting to spread them too far. The mini-transducer (speaker)
and sound tube are easily removed from the board without removing the board from
the handle housing. The rubber gasket that seals the sound tube to the AudioScope
head is called a Stabilizing Grommet. This grommet can be changed if it leaks air. Air
leaks can deteriorate the performance of the instrument. Air leaks are a result of
rough handling and resultant broken seals in the housing halves, or bad gaskets around
the lens and or the stabilizing grommet.
Lens gaskets are installed during assembly before right and left side cases are bonded
together. Replacement is not covered in this manual.
4.1.1 Prepare the unit for disassembly or service
___ Turn the LOCKED/OPEN knob on the bottom of the AudioScope to
OPEN (the two lines should meet together at the bottom). Use a
flathead screwdriver or coin.
___ Slide the top of the housing backwards, exposing the battery and
board.
___ Lift the battery out by pulling upwards on the positive end.
___ Remove the lamp by pressing the blue button on the board.
4.1.2 Speaker removal
___ Do not try to pull the sound tube out of the boot since the boot end of
the sound tube is flared.
___ Gently push the speaker boot (containing the speaker) off of the metal
spring clip.
___ Gently pull the speaker out of the boot.
___ Note the position of the red and black wires relative to the imprinting
on the speaker and un-solder them (using T19102-2).
4.1.3 Speaker replacement
___ Solder red and black wires to new speaker in the order noted
above (in step 4.1.3) .
___ Gently press the speaker into the speaker boot.