Product Manual

Personal Ambulatory Oxygen System Provider Technical Manual

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 o 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