Bose AV28 Manual page 30

7. Main PCB Removal
7.1 Perform procedure 5.
7.2 Disconnect the cables from J102, J103,
J106, J213, and the DVD/CD mechanism's
ribbon cable.
7.2 Release the main PCB (2) from the four
locking tabs located on the base (9). Two
located at the front and one located on each
side of the PCB.
7.3 Lift up the front of the main PCB and slide
it forward and up.
8. Main PCB Replacement
8.1 Lower the rear of the main PCB (2) into
the base (9) so the connectors protrude out
the rear of the base.
8.2 Align the headphone jack PCB (2) with
the hole in the side of the base. The main
PCB (2) and tuner PCB support bracket (21)
will secure the headphone jack PCB in place.
8.3 While applying rearward pressure on the
PCB, press downward at the locations of the
four locking tabs; two located at the front and
one located on each side of the PCB.
8.4 Connect the cables to J102, J103, J106,
J213, and the DVD/CD mechanism's ribbon
cable.
9. VFD Module Removal
9.1 Perform procedure 1.
9.2 Release the VFD module (6) from the two
locking tabs, which are located at the two top
corners of the VFD module. Pull up the VFD
module.
9.3 Disconnect the cable from J103, located
on the main PCB (2).
Disassembly/Assembly
(Refer to Figure 3)
10. VFD Module Replacement
10.1 Connect the cable to J103, located on
the main PCB (2).
10.2 Slide the VFD module (6) into the VFD
holder on the base until the two locking tabs
snap into place.
11. IR PCB Removal
11.1 Perform procedure 1.
11.2 Lift up the bezel (41).
11.3 Release the IR PCB (2) from the locking
tab located on the left side of the IR PCB. Lift
up on the IR PCB and then slide it to the left.
11.4 Disconnect the cable from J1000.
12. IR PCB Replacement
12.1 Connect the cable to J1000.
12.2 Slide the IR PCB (2) under the catch on
the right side.
12.3 While aligning the IR PCB with the two
locator guides, press down until the IR PCB
snaps into place.
13. Laser Current Measurement Access
13.1 Perform procedure 3.
13.2 Remove the four screws that secure the
bottom cover of the DVD/CD assembly (1) to
its chassis. Lift off the bottom cover.
13.3 Refer to figure 6 for the location of the
laser current measurement points and the
laser current information located on the
mechanism labels.
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