GE Centiva/5 Plus, Техническое справочное руководство

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7 Repair procedures
TRM, Centiva/5 Plus, M1047448/CM-922026, rev. 3.50.a 7-41
7.9.13 Remove sub
chassis
Note
The sub chassis contains the PC board B, the alarm speaker B, the transformer
assembly and the fan. To replace fan or transformer the sub chassis must be
removed. The sub chassis must also be removed to gain access to the rear
connectors (AC mains connector, DC mains connector, ground connector, serial
connector). To remove the sub chassis:
1.
Remove the control panel according to section 7.2.2.
2. Remove the panel mounting plate according to section 7.2.6.
3. Open the main engine according to section 7.2.5.
4. Remove back-up battery according to section 7.9.2.
5. Remove the expiratory valve locking assembly according to section 7.9.3.
6. Disconnect electrical connectors X 21, X 22, (X23), X 10, X15, X16, X 24, X 31,
(X 42) and X 44.
7. Loose tape fixing of cable X 10 on rear side of sub chassis.
8. Use a 7 mm nut driver to remove the common ground and disconnect all
ground lines from the sub chassis.
9. Disconnect the transformer connector according to section 7.4.
10. Disconnect pressure measuring tube B at the tube connector.
11. Disconnect flow measurement tubes C/C’ and D/D’ at the tube connectors.
12. Disconnect “ambient” tube for the pressure transducers at the T-piece towards
the pneumatic assembly.
13. Disconnect the “patient” tube at the inspiratory connection to gain better
access to the front left sub chassis fixing nut.
14. Use a 7 mm nut driver to remove the two nuts left and right in front of the
transformer and the two nuts left and right behind the transformer.
15. Lift the back of the sub chassis and move it up and forward.
16. Reassemble by following the instructions above in reverse.
Reassembly of the common ground connection requires a contact washer between
sub chassis and first connector and a spring washer between the last connector
and the nut.