p/n 18603-001, Rev. C LTV
®
1200/1150 Ventilator Service Manual Page 8-101
Power Board Assembly
Parts required for replacement: Tools required:
• Power PCBA P/N 18120-001
• Phillips screwdriver with torque meter
• Grounded anti-static wrist strap
• P/N 11599 – Power PCB Separator
55
• 1/4” Nut driver adapter for torque wrench
• 120 in-oz (0.84 Nm) torque screwdriver
To replace the Power PCBA and DC Cord Pigtail related hardware
WARNING
Mounting Screw Use – Be sure to use the correct length mounting screws as specified in
the instructions or internal damage to the ventilator may result.
1) Remove the back panel of the ventilator and disconnect the internal battery cable (see
instructions on page 8-28).
2) Remove the motor board (see instructions on page 8-90). Retain screws for
reinstallation.
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.
3) Disconnect the Pisco connector from the oxygen pressure transducer on the analog
board (LTV
®
1200 only).
4) Disconnect the 2-wire fan connector, 3-wire flow valve connector, 4-wire rotary switch
connector, 8-wire O
2
blender (LTV
®
1200 only), 2-wire flow valve temperature, and 2-
wire sounder connectors from the power board.
5) Remove the alarm sounder (see instructions on page 8-55).
6) Remove the flow valve assembly (see instructions on page 8-65).
7) Disconnect the three (3) flexible tubes from the Flow Xducer and Exh Valve fittings on
the side of the ventilator.
55
The Power PCB Separator tool is available separately, or as part of the Maintenance Calibration Kit, P/N
11566.
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