BOSE bose-ps1-l1-rev1-schematics free download

File name bose-ps1-l1-rev1-schematics.pdf

Figure 9. PS1 Power Stand Electronics Module with Top Cover Removed 77 Disassembly Procedures Power Stand Procedures Note: Refer to Figure 9 for the following procedures. 1. Lower Housing Removal 1.1 Place the power stand on a soft surface so that the line array opening faces down. 1.2 Using a Phillips-head screwdriver, remove the 19 screws that secure the lower housing to the upper housing. Lift off the lower housing. 2. Amplifier Housing Removal 2.1 Perform procedure 1. 2.2 Make a note of the wiring, and discon- nect the wiring harnesses and connectors that run to the amplifier housing. The ampli- fier housing is the large metal box with the four fans. 2.3 Using a Phillips-head screwdriver, remove the four screws that secure the power stand base plate to the bottom of the line array cavity. Lift it off of the cavity. Be careful not to damage any wires. 2.4 Once all of the wiring is disconnected, use a Phillips-head screwdriver to remove the 16 screws that secure the amplifier housing to the power stand upper housing. Carefully lift the amplifier housing out of the power stand upper housing. 3. Line Array Cavity Removal 3.1 Perform procedure 2. 3.2 Using a Phillips-head screwdriver, remove the three screws that secure the line array cavity to the upper housing. Lift the line array cavity off of the upper housing. The power stand foot pedal will disengage from the shaft. 78 Disassembly Procedures 4. Amplifier PCB Removal 4.1 Perform procedure 2. 4.2 Make a note of the wiring and disconnect all of the wiring harnesses that connect the power supply box to the DSP PCB and to the microprocessor PCB. 4.3 Using a Phillips-head screwdriver, remove the 24 screws that secure the power supply box top cover in place. Lift off the top cover. 4.4 Once you have the top cover off, make a note of the wiring configuration and unplug the wiring harnesses that connect to the amplifier PCB. 4.5 Using a Phillips-head screwdriver, remove the 6 screws that secure amplifier PCB in place. Lift the amplifier PCB out of the chassis. 5. Switching DC Power Supply Removal 5.1 Perform procedure 2. 5.2 Make a note of the wiring and disconnect all of the wiring harnesses that connect the power supply box to the DSP PCB and to the microprocessor PCB. 5.3 Using a Phillips-head screwdriver, remove the 24 screws that secure the power supply box top cover in place. Lift off the top cover. 5.4 Once you have the top cover off, make a note of the wiring configuration and unplug the wiring harnesses that connect to the switching DC power supply PCB you wish to remove. 5.5 Using a Phillips-head screwdriver, remove the 4 screws that secure power supply PCB in place. Lift the power supply PCB out of the chassis.