LTV 1150 - Main Board Assembly

Page 8-82 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Main Board Assembly
Parts required for replacement: Tools required:
• Main PCBA Assembly P/N 18233-001
Replace if damaged:
• 1/4" Pan-head Screw (3) P/N 10435
• 3/16” Hex Standoffs (2) P/N 11543
• Phillips screwdriver with torque meter
• Grounded anti-static wrist strap
NOTE
When ordering a replacement Main PCBA assembly, be prepared to identify the serial
number of the ventilator being serviced and the total usage hours on the unit. This will be
required for programming the board prior to shipping.
To replace the Main Board:
1) Remove the back panel of the ventilator and disconnect the internal battery cable (see
instructions on page 8-28).
2) Remove the fan assembly (see instructions on page 8-63).
3) Remove the motor board (see instructions on page 8-90).
NOTE
Tubing Configurations - When disconnecting tubes, note their positions and review the
internal flexible tube routing tables, instructions and diagrams beginning on page 8-33.
If tubing needs to be replaced, consult the tables and instructions in Internal Flexible Tubing
beginning on page 8-33 for tubing diameters, lengths and routing diagrams.
4) Disconnect the Pisco connector from the oxygen pressure transducer on the analog
board (LTV
®
1200 only).
5) Disconnect the 2-wire fan connector, 2-wire flow valve thermistor cable, 3-wire flow
valve connector, 4-wire rotary switch connector, 8-wire oxygen blender connector (LTV
®
1200 only), and 2-wire sounder connector from the power board.
6) Remove the sounder assembly (see instructions on page 8-55).
7) Remove the flow valve assembly (see instructions on page 8-65).
8) Disconnect the three (3) flexible tubes from the Flow Xducer and Exh Valve fittings on
the side panel of the ventilator.