Bose CD-20 Service Manual page 15

DISASSEMBLY/ASSEMBLY PROCEDURES
9. CD Mechanism Removal
9.1 Perform procedure 5.
9.2 Lift the CD mechanism (14) straight up
from the base (9).
10. CD Mechanism Replacement
10.1 With the opening of the CD mecha-
nism facing towards the front of the unit,
lower the CD mechanism into the base (9)
aligning the four grommets (15) with the
four posts on the base (two not shown).
Note: Make sure the four springs (16) are
located on the four outer posts of the base.
10.2 Perform procedure 6.
11. Control Panel Removal
11.1 Perform procedure 5.
11.2 Grasp the top edge of the control
panel (17) and pull it forward.
12. Control Panel Replacement
12 1 Tilt the control panel (17) forward and
place it into the base (9) so that the lower
edge of the control panel is in front of the
catches on the base. Tilt the control panel
towards the rear of the base until the
control panel snaps into place.
13. PCB Assembly Removal
13.1 Perform procedure 5.
13.2 Grasp the PCB assembly (18) and lift
it straight up.
13.3 The RCA jack PCB (19) and the
headphone PCB (20) are wired to the PCB
assembly. Lift the RCA Jack PCB and the
headphone PCB straight up.
Note: When removing the PCB, make a
note of the wire dressing for reinstallation.
14. PCB Assembly (Disassemble)
14.1 The power supply PCB (21) and the
tuner PCB (22) are plugged into the main
PCB (23). Grasp the power supply PCB or
the tuner PCB and pull in an outward
direction from the main PCB.
15. PCB Assembly (Assemble)
15.1 Connect the power supply (21) and
the tuner PCB (22) to the main PCB by
plugging them into the main PCB (23) via
connectors: J3 and J4 on the power
supply PCB, J306 and 307 on the tuner
PCB. Tabs on the tuner and power supply
PCB lock into slots on the display PCB
(24) to create a mechanical support.
16. PCB Assembly Replacement
16.1 While lowering the PCB assembly
(18) into the base (9), angle it so that the
RCA jacks protrude out the rear of the
base.
16.2 Insert the RCA Jack PCB (19) into
the holes in the base marked "TAPE IN,
TAPE OUT". The superstructure (2) will
give mechanical support to the RCA
Jacks.
16.3 Insert the headphone PCB (20)
with connector J612 up, into the slot.
16.4 Redress all wires.
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