502C Controller Disassembly Procedures - Bose Panaray 502A Service Manual

14. Speakon ® Connector Removal
14.1 Remove the 4 screws that secure the
connector to the access panel.
14.2 Make a note of the wiring configuration
and cut the connector leads as close to the
terminals as possible. Remove the connec-
tor.
Re-assembly Notes:
1. Use the note from step 14.2 to ensure
proper wiring connections.
2. Align the connector gasket to provide an
airtight seal.
15. Fuseholder Removal
15.1 Remove the access panel using proce-
dure 9.
15.2 Remove the fuseholder nut (19) from
the fuseholder body (12).
15.3 Unsolder the wires from the fuseholder
terminals.
502C Controller Disassembly
Procedures
Notes:
1. Refer to Figure 14 or 15 for the following
procedures.
2. Later production units have fewer screws
than earlier units. These quantity differences
are noted in the procedures below.
3. Unless otherwise specified, a T-10 Torx
bit is recommended for screw removal.
16. Top Cover/Front Plate Removal
WARNING: Be sure to unplug the unit from
the AC Mains before removing the top cover.
There are hazardous voltages inside the
chassis.
16.1 Remove the 2 screws (2) that secure
the top cover (1) to the back of the chassis.
Earlier units will have 4 screws.
DISASSEMBLY PROCEDURES
16.2 Remove the 2 top screws (4) that
secure the top cover to the front plate (3).
Earlier units will have 3 screws on top.
16.3 Slide the top cover out from under the
front plate, and lift it off the unit.
16.4 Front Plate Removal: There are two
screws (4) on the bottom that hold the front
plate to the chassis. Remove the screws
and washers and pull the front plate away
from the chassis.
17. Main PCB Removal
17.1 Remove the top cover and front panel
using procedure 16.
17.2 Disconnect the following connectors:
P6-P8 (barrier strip connectors only), P1
(line cord assembly), P2 and P3 (trans-
former connectors).
17.3 XLR version: Remove the 6 screws
(2) that secure connectors (J3, J4, P9-12)
to the chassis. Earlier units have 12 screws.
17.4 Carefully scrape the glue away from
the terminals of power switch S5 (6).
Disconnect the terminals.
17.5 Barrier strip version: Remove the 5
screws (8) that secure the Main PCB (7) to
the chassis.
17.6 XLR version: Remove the 2 screws
(8) which secure the Main PCB to the chas-
sis. Earlier units have 5 screws.
17.7 Squeeze the 2 metal posts (not shown-
they are located in the 2 front corners of the
PCB) that secure the Main PCB to the
chassis bottom. Lift the PCB straight up.
17.8 Slide the PCB out towards the front of
the unit and pull it away from the chassis.
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