Used ICs: NJM2902 – 4558 – TA8210AH
Removing the front grille:The grille gasket is held in place by friction fit. In the slot on the top between the grille gasket and the cabinet, place a wide flat tool and slowly begin to wedge the screen/gasket off. Continuing to carefully wedge the grille off by working your way around the gasket..
You may wish to cover the tip of the flat tool you are using with cloth so as to minimize the damage, you may inflict on the cabinet.
Main body separation:
Unscrew the 6 screws around the perimeter of the baffle’s front surface. Again, using caution to not damage the cabinet, place a flat tool in the side and bottom channels and slowly begin wedging the baffle off. Note this assembly has areas of hot glue connecting the baffle and the cabinet together at the left and right side of the upper body. Considerable effort may be needed.
Removing the
rear terminal cup:
Pull the volume knob off. Remove the 4 screws holding the rear terminal cup on. Note this will release the internal air seal cup, containing the volume and the jack PCB assemblies from the air seal cup, you will need to cut the air seal on the cup surface to allow removal.
Heat sink and the main PCB removal
The heat sink is removed by unscrewing 4 screws connecting it to the cabinet housing. The main PCB can be removed from the heat sink by unscrewing 2 screws from the back side of the main PCB into the heat sink and 2 screws through IC601 into the heat sink. Do not unscrew this assembly, unless necessary.
Speaker removal:
The woofer can be removed by unscrewing 4 screws on the front of the baffle. The tweeter can be removed by unscrewing 2 screws on the tweeter conncting it to the insdie of the baffle.
Slave speaker:
Removing the front grille:
The grille gasket is held in place by a friction fit. In the slot on the top between the grille gasket and the cabinet, place a wide flat tool and slowly begin to wedge the screen/gasket off. Continuing to carefully wedge the grille off by working your way around the gasket. You may wish to covner the tip of the flat tool you are using with cloth so as to minimize the damage (scarring) you may inflict on the cabinet.
Main body separation:
Unscrew 6 screws around the perimeter of the baffle’s front surface. Again using caution to not damage the cabinet, place a flat tool in the side and and the bottom channels and slowly begin wedging the baffle off. Note this assembly has areas of hot glue connecting the baffle and the cabinet together at the left and right sides of the upper body. Considerable effort may needed.
Removing the rear terminal cup:
Remove the 4 screws holding the rear terminal cup on.
Speaker removal:
The woofer can be removed by unscrewing the 4 screws on the front of the baffle. The tweeter can be removed by unscrewing the 2 screws on the tweeter connecting it to the inside of the baffle.
Pull the volume knob off. Remove the 4 screws holding the rear terminal cup on. Note this will release the internal air seal cup, containing the volume and the jack PCB assemblies from the air seal cup, you will need to cut the air seal on the cup surface to allow removal.
Heat sink and the main PCB removal
The heat sink is removed by unscrewing 4 screws connecting it to the cabinet housing. The main PCB can be removed from the heat sink by unscrewing 2 screws from the back side of the main PCB into the heat sink and 2 screws through IC601 into the heat sink. Do not unscrew this assembly, unless necessary.
Speaker removal:
The woofer can be removed by unscrewing 4 screws on the front of the baffle. The tweeter can be removed by unscrewing 2 screws on the tweeter conncting it to the insdie of the baffle.
Slave speaker:
Removing the front grille:
The grille gasket is held in place by a friction fit. In the slot on the top between the grille gasket and the cabinet, place a wide flat tool and slowly begin to wedge the screen/gasket off. Continuing to carefully wedge the grille off by working your way around the gasket. You may wish to covner the tip of the flat tool you are using with cloth so as to minimize the damage (scarring) you may inflict on the cabinet.
Main body separation:
Unscrew 6 screws around the perimeter of the baffle’s front surface. Again using caution to not damage the cabinet, place a flat tool in the side and and the bottom channels and slowly begin wedging the baffle off. Note this assembly has areas of hot glue connecting the baffle and the cabinet together at the left and right sides of the upper body. Considerable effort may needed.
Removing the rear terminal cup:
Remove the 4 screws holding the rear terminal cup on.
Speaker removal:
The woofer can be removed by unscrewing the 4 screws on the front of the baffle. The tweeter can be removed by unscrewing the 2 screws on the tweeter connecting it to the inside of the baffle.
Exploded view
Schematic
