Bose FreeSpace 6 Manual page 14

6.3 Connect the following cables:
• Connect the transformer's five-pin sec-
ondary cable to the Amp PCB's P4 connec-
tor.
• Connect the transformer's five-pin pri-
mary cable to the Amp PCB's P7 connec-
tor.
IMPORTANT: Pin 1 of the transformer's
five-pin primary cable is keyed to pin 1 of
Amp PCB connector P6 (or P7 depending
upon the unit's applicable voltage rating).
6.4 Install the Chassis Cover/Top Cover
(Procedure 2).
7. IO1 & IO2 PCB Removal (Chassis Top)
7.1 Remove the Chassis Cover/Top Cover
(Procedure 1).
7.2 Remove six black screws (5) from both
Amplifier IO PCB's (8). Remove the IO2
PCB board first. Grasp it by the top cor-
ners, lift up and off the chassis-top's stand-
offs. (Note: The IO boards are connected
by a 12-pin cable. Do not attempt to sepa-
rate until both are removed).
7.3 Remove both two-pin and eight-pin
cables from the cable clamp (12) from the
inside of the chassis-top cover.
7.4 Grasp the IO1 PCB board by its top
corners, lift up and off the chassis-top's
standoffs. Position the board at a 45° angle
and carefully pull it back so that the I/O
connectors clear the top cover.
7.5 To separate boards, disconnect the 12-
pin cable from connector P1A on the larger
board.
8. IO1 & IO2 PCB Replacement (Chassis
Top)
8.1 Connect the 12-pin cable to connector
P1A on the larger board.
8.2 Carefully align both board's connectors
into the chassis top cover and snap them
onto the chassis standoffs.
8.3 Secure the two-pin and the eight-
pin cables into the cable clamps (12).
8.4 Replace six black screws (5) and
tighten to secure both boards.
8.5 Install the Chassis Cover/Top Cover
(Procedure 2).
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