Rotary Switch (Set Value Knob) Assembly - CareFusion LTV 1200 Service Manual

Rotary Switch (Set Value Knob) Assembly

Parts required for replacement:

Rotary Switch Replacement Kit P/N 14271

Rotary Switch (with hex nut) P/N 11190

Washer P/N 11644

O-Ring P/N 11645

Gray Knob and Spring P/N 18334-001

Purple Knob and Spring P/N 19037-001
To remove and replace the Rotary Switch assembly:
1) With the ventilator face up, gently pry the knob off the rotary switch shaft using dental picks
or small flat-edged screwdrivers. There are 2 notches in the underside of the knob to make
this easier. Be careful not to damage the edge of the faceplate around the knob.
2) Remove the ventilator back panel and disconnect the internal battery cable (see instructions
on page 8-28).
3) Disconnect the 4-wire flow valve connector from the motor board.
4) Disconnect the Pisco connector from the oxygen pressure transducer on the analog board.
See diagram on page 8-33.
5) Disconnect the 3-wire flow valve connector from the power board.
6) Disconnect the flexible tubing from the airway pressure transducer on the analog board.
7) Remove the two (2) screws securing the accumulator to the turbine manifold spacer.
8) Move the accumulator, 4-wire flow valve cable and the tubing from the airway pressure
transducer aside.
9) Disconnect the rotary switch cable connector from the power board.
10) Use a 13 mm nut driver to remove and discard the retaining nut from the front of the
ventilator.
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Contained in Rotary Switch Replacement Kit P/N 14271
Page 8-118
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LTV 1200, 1150, and 1100 Ventilator Service Manual
Tools required:

Phillips screwdriver with torque
meter
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
2 small flat tip screwdrivers or
dental picks

1/2" nut driver adapter for torque
65
wrench
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
13mm nut driver adapter for torque
wrench

Grounded anti-static wrist strap
p/n 18603-001, Rev. J