Bose FREESPACE BMA-125 Service Manual - Page 7
Browse online or download pdf Service Manual for Amplifier Bose FREESPACE BMA-125. Bose FREESPACE BMA-125 49 pages. Business music amplifier 120/230v
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120V DISASSEMBLY/ASSEMBLY PROCEDURES
1. Top Cover Removal
1.1 Remove the ten screws that secure the
top cover to the chassis. There are five on
each side.
1.2 Lift the cover up.
2. Top Cover Replacement
2.1 Place the top cover over the chassis
and align the five screw holes on the top
cover with the screw holes on the chassis.
2.2 Replace the ten screws that secure the
top cover to the chassis. There are five
screws on each side.
3. Input Module Removal
3.1 Remove the four screws that secure
the input module to the chassis.
3.2 Remove the input connector from the
input PCB.
3.3 Slide the input module out from the
rear of the chassis.
4. Input Module Replacement
4.1 Slide the Input Module into the rear of
the chassis so that the labels are aligned
with the labels on the chassis.
4.2 Replace the four screws that secure
the input module to the chassis.
4.3 Connect the input connector to the
input PCB.
5. Tone/Volume Control PCB Removal
5.1 Remove the two screws from the
bottom of the chassis that secure the PCB
to the chassis.
5.2 Remove the input Five, bass and treble
control knobs by pulling straight away on
them.
5.3 Remove the three nuts that secure the
input Five, bass and treble controls to the
chassis.
5.4 Slide the PCB towards the rear of the
unit until the potentiometer's shafts clear
the holes in the chassis.
5.5 Lift the PCB up.
5.6 Remove the four screws that secure the
shield to the PCB.
5.7 Remove all wires attached to the PCB.
Note: Make a note of the wiring configura-
tion before removing any wires.
6. Tone/Volume Control PCB Replace-
ment
6.1 Attach the wires to the PCB.
6.2 Replace the four screws that secure
the shield to the PCB.
6.3 Lower the PCB into the chassis and
slide it forward until the shafts protrude out
the front of the chassis.
6.4 Replace the three nuts that secure the
input five, bass and treble control potenti-
ometer to the chassis.
6.5 Replace the control shaft knobs by
pushing them on.
6.6 Replace the two screws located on the
bottom of the chassis that secure the PCB
to the chassis.
7. Input 1, 2, 3, 4 and Master Volume
Control Removal
7.1 Pull out on the knob to remove it.
7.2 Remove the nut that secures the pot's
shaft to the chassis.
7.3 Slide the pot out of the hole in the
chassis.
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