Datex-Ohmeda Aestiva 7900 SmartVent, Service Manual

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6/ Repair Procedures
1503-0151-000 5/26/0 6-1
6.1.General
WARNING:
w w w w
Post-Service Checkout is required after you complete this section. You
must perform section " 3/Post-Service Checkout" after performing any
maintenance, service or repair. Failure to do so may result in patient injury.
WARNING:
w w w w
When servicing the ventilator, extreme care must be taken to avoid introduc-
ing foreign debris, particularly metal chips generated by screw threads into
the pneumatic flow passages of the ventilator. Failure to do so may result in
damage to the flow valve and possible injury to the patient.
Some of the illustrations in this section have callouts listed with the figures. Others have
numbers on the illustrations that correspond as references to procedure numbers.
Assemblies -- tools for removal and installation
Description, subassembly Tools to remove/replace
Top Cover Pozi Driv* screwdriver, No. 2
Gnd wires
top cover
power module
chassis
Isolation transformer
7 mm nut driver or open-end wrench
7 mm nut driver for ground wire - 10 mm nut driver for
large mounting bolt and Nyloc nut
Encoder removal 14 mm nut driver for mounting nut
Front Panel 2.5 mm hex wrench
Display board 7 mm nut driver and 5.5 mm nut driver
Microcontroller board 7 mm nut driver & offset flat blade screwdriver
Power Supply board 7 mm nut driver & offset flat blade screwdriver
PCB removal Straight blade screwdriver, offset
Power module 7 mm nut driver
Pressure Sensing Switch 2 mm hex wrench
Drive gas check valve assy 3 mm hex wrench
GIV cap removal Tru arc tool (Hi Tech No. 1221-5)
Inlet valve body 3 mm hex wrench
Solenoid on inlet valve body 1.5 mm hex wrench
Mechanical over pressure bleed off valve
(MOBO) 3 mm hex wrench, 2.5 mm hex wrench and align-
ment tool Stk. No. 1503-3124-000
Flow control valve 3 mm hex wrench
Regulator, non-relieving (note: do not
loosen/remove Phillips head screws)
4 mm hex wrench
Exhalation valve handle mounts 2.5 mm hex wrench
Pneumatic manifold from chassis 2.5 mm hex wrench
Power cord guard Pozi Driv* screwdriver, No. 2 driver
Alarm speaker 5 mm open end wrench or nut driver
Flash EPROM Removal 32 pin PLCC Chip Extractor
*POZI-DRIV Trademark Phillips Screw Co.