A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
Text excerpt from page 5 (click to view)
Dismantling the Grill Base & Speaker Driver
1. Place the Subwoofer Box as shown in the Picture 1 and use a screw driver to force open the Grill Base. Caution: Take care the surface when take out the Grill Base of Subwoofer 2. Place the Subwoofer Box as shown in the Picture 2 and loosen 4 screws A to remove the Speaker Driver.
Dismantling the Front Assembly
1. Place the Subwoofer Box as shown in the Picture 3 (Bottom view) and use a screw driver to force open the front assembly. Caution: Do not break the bundle of wires to the front. Take care the surface when take out the front panel of subwoofer
Dismantling the Rear assembly
1. Loosen 9 screws B as shown in the Picture 4 (Rear View) to pull out the Printed Circuit Board assembly.
Caution: Do not break the bundle of wires to the front.
WARNING: THERE IS ONLY A LED BETWEEN FRONT PANEL AND WOOD BOX. IF NOT NECCESSARY, PLEASE DO NOT TRY TO OPEN THE FRONT PANEL!!!