Bose 1801 Service Manual page 7

DISASSEMBLY/ASSEMBLY PROCEDURES
Note: Refer to Figure 5 for the following
procedures.
9. LED PCB Removal
9.1 Perform procedure 7.
9.2 Unsolder the wires to the LED PCB
and make a note of the wiring configura-
tion.
9.3 Remove the center nut located on
each side on the LED lamp housing.
9.4 Lift the LED assembly out from the
front chassis.
9.5 Disassemble the LED assembly to gain
access to the PCB.
Note: Remember how the lamp housing
spacers are placed.
10. LED PCB Replacement
10.1 After reassembling the LED assem-
bly, place it onto the front panel assembly
and secure it in place.
10.2 Resolder the wires to the PCB.
10.3 Perform procedure 8.
11. Meter Assembly Removal
11.1 Perform procedure 7.
11.2 Remove the three nuts holding the
meter lamp housing assembly to the front
panel assembly.
11.3 Remove the two nuts holding the
wires to the meter you want to replace and
remove the meter.
12. Meter Assembly Replacement
12.1 Place the new meter on to the front
assembly. Connect the wires going to the
meter.
1801 Power Amplifier
12.2 Place the meter lamp housing over
the meters and secure it to the front assem-
bly.
12.3 Perform procedure 8.
13. Front Panel Controls Removal
13.1 Perform procedure 7.
13.2 Locate the control or switch you want
to replace and unsolder the wires and
components on that control or switch.
13.3 Remove the shaft nut holding the
control or switch to the front assembly and
remove it.
14. Front Panel Controls Replacement
14.1 Place the new control or switch into
the front assembly and secure it in place.
14.2 Resolder the wires and/ or compo-
nents to the control or switch.
14.3 Perform procedure 8.
15. Lamp Removal
15.1 Perform procedure 7.
15.2 Using a flat blade screwdriver, pry
under the edge of the socket and lift the
socket out.
16. Lamp Replacement
16.1 Replace the defective lamp.
16.2 Place the lamp socket back into the
lamp housing.
16.3 Perform procedure 8.
Note: It may be necessary to remove the
LED PCB Assembly to replace the lamps
see procedure 9.
6