Disassembly Procedures; Controlspace Esp-88 Chassis - Bose ControlSpace ESP-88 Service Manual

DISASSEMBLY PROCEDURES

®
ControlSpace ESP-88 Chassis
Refer to Figure 4 for the following proce-
dures
1. Top Cover Removal
1.1 Using a Phillips-head screwdriver,
remove the eight screws (2, 3) that secure
the top cover (1). There are six around the
back and side edges of the cover and two at
the front lip.
1.2 Lift off the top cover.
2. Switch Mode Power Supply (SMPS)
Removal
2.1 Perform procedure 1.
2.2 Disconnect the power supply AC wiring
harness located toward the rear of the
chassis (22). Disconnect the green ground
wire from the GND terminal on the power
supply. Disconnect the DC output connector
located toward the front of the chassis. This
cable harness connects to the motherboard.
2.3 Using a Phillips-head screwdriver,
remove the four screws that secure the
power supply to the chassis. These screws
are located on the bottom of the chassis. Lift
out the power supply.
3. DC Fan Removal
3.1 Perform procedure 2.
3.2 Unplug the DC fan wiring harness from
the motherboard at CN205.
3.3 Remove the four screws (27) that secure
the DC fan (28) to the chassis (22). Lift out
the fan. Take care to not lose the nylon
locknuts (29).
4. GPIO Board Removal
4.1 Perform procedure 1.
4.2 Using a Phillips-head screwdriver,
remove the two screws (3) that secure the
GPIO card (31) to the back of the chassis
(22).
4.3 Unplug the wire harness at CN102. Lift
out the GPIO card.
Note: The chassis can support up to two
GPIO cards at the end of the chassis near-
est the power supply.
5. DSP PCB Removal
5.1 Perform procedure 1.
5.2 Using a Phillips-head screwdriver,
remove the two screws (3) that secure the
DSP card (30) to the back of the chassis
(22).
5.3 Lift up on the back of the DSP card until
it unplugs from the motherboard (12) con-
nector. Lift out the DSP card.
Re-assembly Note: When re-installing the
card, ensure that the LEDs at the front edge
of the card align with the openings in the
front panel.
6. Mic/Line Input PCB Removal
6.1 Perform procedure 1.
6.2 Remove the one screw (3) that secures
the LED PCB (25) to the front panel (21).
This screw is located in the middle of the
LED PCB at the front end of the Mic/Line
Input PCB (10).
6.3 Remove the two screws (3) that secure
the back of the Mic/Line PCB to the chassis
(22). These screws are located at the back
of the chassis.
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