Bose 1600-VI Service Manual download pdf (Page 28)

28

DISASSEMBLY/ASSEMBLY PROCEDURES

18. Power Supply Board Replacement

18.1 Attach the power supply board (7) to

the heatsink (18) by tightening four screws

(30) into each corner of the board. Use a

phillips-head screwdriver. Refer to Figure 7.

18.2 Seat the regulator board into the

power supply board, see Procedure 6.

18.3 Secure the power supply heatsink

bridge to the heatsink by tightening two

screws (30) with a phillips-head

screwdriver.

18.4 Secure the power supply large

capacitors to the chassis by tightening one

screw into the nylon clamp (21). See

Figure 8.

18.5 Connect all wiring to the power supply

WL1-WL8 terminals.

18.6 Connect all wires attached to the

power supply terminals E5-E17.

18.7 Connect the amplifier board ribbon

cable to the power supply J2 connector.

18.8 Replace the transformer (4) using

procedure 12.

18.9 Replace the cover (1) using

procedure 2.

Note: Refer to Figures 6 and 7 for the

following procedures.

19. Fan Removal

19.1 Remove the cover (1) using

procedure 1.

19.2 Use procedure 15, Steps 15.2-15.12

to move the heatsink (18), with the ampli-

fier, power supply and regulator boards

attached, to allow access to the fan (23).

19.3 Release the fan and shield (26) from

the chassis back panel by removing two

screws (3) with a phillips-head screwdriver.

The screws are located over the fan

exhaust slot.

19.4 Release the lower shield from the

bottom of the chassis by removing two

screws (3) with a phillips-head screwdriver.

19.5 Disconnect the fan cable (J1) from the

output board (16) J3 connector.

19.6 Lift out the fan and shield. To disas-

semble the fan from the shields, (upper

(27) and lower (26)) use a phillips-head

screwdriver and 5/16" wrench to remove

four screws (28) and locknuts (12).

20. Fan Replacement

20.1 Place the fan (23) label-side down

onto the lower shield (26). The fan is

seated flush on one side of the lower shield

and a 1/2" space on the other side. Align

the fan so that the red and black wires are

on the side of the shield with the 1/2"

space.

20.2 Place the upper shield (27) on the

back of the fan. Use a phillips-head screw-

driver and 5/16" wrench to tighten four

screws (28) and locknuts (12).

20.3 Secure the fan and shield to the

chassis back panel by tightening two

screws (3) with a phillips-head screwdriver.

The screws are located over the fan

exhaust slot.

20.4 Secure the lower shield to the bottom

of the chassis by tightening two screws (3)

with a phillips-head screwdriver.

20.5 Connect the fan cable into the output

board (16) J3 connector (Pin 1 is red,

Pin 2 is black).

20.6 Use procedure 16, Steps 16.4-16.15

to install the heatsink (18) and cabling.

20.7 Replace the cover (1) using

procedure 2.

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