A good manual. Had everything i needed to make the repair.
Text excerpt from page 5 (click to view)
SUBWOOFER MUTING
Install diode on the main board (component side), solder to resistor R689 (figure 1) with a long wire connected to resistor R903 on the standby power-supply board (foil side), see figure 2
NEW DIODE 1N4148 CATHODE FACING R689 WIRE FROM DIODE ANODE