Personal Ambulatory Oxygen System
Provider Technical Manual
85
A Procedure to replace the new Combo Power Manager Board and Battery Bridge Board:
1 Remove and Replace Combo Power Manager board set
1.1 Remove the Power Cartridge and unscrew the 4 screws holding the BBB pcb to the case (PN: 6974-312-SEQ) shown in Fig 63.
Fig 63: Screws
1.2 Remove the Unit cover as described in section, “Remove and Replace the Unit Cover”.
1.3 Disconnect the 5 wire harnesses as shown in Figure 54. Remove the Battery Bridge pcb (BBB pcb) as shown in Fig 63 (Pull straight
up and off of the Power Manager pcb.)
Fig 64: Cable locations
Disconnect power supplies and remove Power Cartridge before
removing the unit cover. Do not touch exposed circuits during
maintenance without ESD protection.
WARNING:
Compressor Cable
Extrenal Power Cable
Cooling Fan Cable
Compressor Cable