ResMed VPAP III, VPAP III ST, VPAP III ST-A Service Manual page 33

5 Release the other front lock tab.
6 Continue to lift the PCB while progressively releasing the remaining lock tabs.
7 Take out the PCB and remove the serial connector seal.
Note: Not all units will contain the serial connector seal. Connector seal R300-7109 can be
installed in those units that do not currently have a seal.
8 Very carefully release the locking device on each side of the flexible cable using a small screw
driver and pull out the cable.
9 Take the new Main PCB and fit the serial connector seal.
10 Install flexible cable in the locking device, then carefully close both sides of the locking device at
the same time.
11 Fold the flexible cable as shown below:
32 VPAP® III, VPAP III ST, VPAP III ST-A Service Manual
Serial connector seal
Fold cable