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L 53 PRELIMINARY SERVICE MANUAL MAY 2005 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 Figure 1 CUP11734-1 Figure 2 CUP11732-6 CUP11734-1 CUP11732-6 ST_M To CUP11734-1 R689 1N4148 To R903 on CUP11732-6 ELECTRICAL PARTS LIST RESISTORS AND CAPACITORS Notes : Parts numbers are indicated for most mechanical parts. Please use this part number for parts order. IMPORTANT SAFETY NOTICE. Components identified by ! mark have special characteristics important for safety. When replacing any of these components, use only manufacture's specified parts. The unit of resistance is OHM () k=1000 () , M=1000 (k) The unit of capacitance is MICROFARAD (uF) P=10-6 uF Numbering System of Resistor Example CRD 25 F J 101 Type Wattage Shape Tolerance Value Resistor Type Wattage Tolerance K[C]RD : Carbon 20 : 1/5W F :