TM 5-4220-227-14
6-20. Portable Oxygen Analyzer.
This task covers:
Repair
INITIAL SETUP:
Tools
Materials/Parts (Cont)
General Mechanic's Tool Kit
Detergent, Nonionic (Item 8, Appendix E)
(NSN 5180-00-177-7033)
Distilled Water (Item 9, Appendix E)
Solder Gun
Materials/Parts
Equipment Condition
Portable Oxygen Analyzer
Chamber shut down (para. 2-15).
Solder, Rosin Core (Item 20, Appendix E)
Portable oxygen analyzer removed (para. 4-34).
Cloth, Lint Free (item 6, Appendix E)
Portable oxygen analyzer battery removed (para. 5-16).
Repair. (figure 6-37)
(1) Remove two screws (1) and separate front cover (2) from housing (3).
(2) Tag and unsolder electrical leads (4) from electrical components on front cover (2) and remove probe leads
(5).
(3) Remove four screws (6) and remove battery holder assembly (7) and stand off bumpers (8).
NOTE
When removing electrical leads to remove a component, refer to schematic (figure 6-38). Tag and remove
leads only as required.
(4) Remove four nuts (9) and remove P.C. board (10).
(5) Remove two nuts (11) and remove transformer (12).
(6) Remove power inlet assembly (13).
(7) Remove range knob (14) and nut (15) and remove switch (16).
(8) Remove span knob (17) and nut (18) and remove potentiometer (19).
(9) Remove four nuts (20) and lockwashers (21) and remove meter (22) from cover (2).
(10) Clean all components using nonionic detergent cleaner and rinse with clean distilled water.
(11) Inspect all components and replace all components that are bent, cracked, worn, or otherwise damaged.
6-80
