Bose AM-30P 서비스 매뉴얼 - 페이지 26
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페이지 인쇄DISASSEMBLY/ASSEMBLY PROCEDURES
Note: Numbers in parentheses correspond
to the callouts in the Figures referred to in the
following procedures. Refer to Figures 14, 16,
and 17.
5.4 Lift out the heatsink amplifier PCB
subassembly from the base plate (4).
5.5 Place the subassembly on the work-
bench with the heatsink (10) face down.
5.6 Place the tip of a flat-head screwdriver
into the metal plate's (11) small rectangular
slot. Quickly pry the heatsink wall back just
enough to release the metal plate from the
heatsink. Refer to Figure 17.
Note: Do not put a permanent bend in the
heatsink wall. A large bend in the heatsink
wall will not allow reassembly of the
heatsink amplifier PCB subassembly.
5.7 Lift out the spring plate (12) that rests
on the power devices.
5.8 Remove the amplifier PCB from the
heatsink.
6. Amplifier PCB Replacement
6.1 Place the amplifier PCB (5) into the
heatsink (10). The PCB should be compo-
nent side up with the transistors and ICs
resting on the inner sides of the heatsink.
Note: Thermal grease should be applied to
the heatsink before seating the PCB.
6.2 Position the spring plate (12) into the
holes of the PCB. The spring plate can only
be inserted one way.
6.3 Position the metal plate (11) so that the
rectangular slot is on the same side as the
amplifier PCB's J1 connector. The side
marked" Outside" Should be facing out.
Insert this side of the metal plate into the
slot of the heatsink.
6.4 Press down on the metal plate quickly
with both palms of your hand. The plate
should snap into the slot of the heatsink.
6.5 Place the heatsink amplifier PCB
subassembly, metal plate side down, into
the module's base plate (4). The large
capacitors fit into the recess of the base
plate. Make sure that the rubber grommets
engage onto the plastic posts.
6.6 Connect the transformer's 5-pin cable
to the amplifier PCB's J1 connector. Con-
nect the woofer harness cable (9) back into
the PCB's J3 connector and the flat ribbon
cable (8) to the amplifier PCB's J2 connec-
tor.
6.7 Place the adapter bracket over the
heatsink amplifier PCB subassembly and
transformer.
Note: Before securing the adaptor bracket
and main PCB over the heatsink amplifier
subassembly, route the flat ribbon cable
underneath the adaptor bracket and
around the heatsink.
6.8 Secure the adapter bracket (6) to the
base plate (4).
6.9 Redress any wire harness to the
adaptor bracket as needed.
6.10 Perform procedure 2.
7. Transformer Removal
7.1 Perform procedure 5 through 5.2.
7.2 Disconnect the transformer's 5-pin
cable from the amplifier PCB's J1 connec-
tor.
7.3 Lift the transformer from the module's
base plate (4).
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