User manual HARMAN KARDON HK6900

[. . . ] Choose the example that best describes the problem you are experiencing. Problem 1: No sound or distorted sound from one loudspeaker in a pair (or set) Connect the dead/distorting loudspeaker to a different amplifier channel (one that had a functioning loudspeaker connected to it). If it functions normally, the problem is not loudspeaker-related. [. . . ] If the loudspeaker still makes no sound or sounds distorted, a wire may have become loose or disconnected, the network (also known as a crossover) may be defective, the drivers (woofer, tweeter, etc. ) may be defective or, in very rare cases, all may be defective. Refer to the wiring diagram and exploded view below. The network is a small circuit board found on the inside of the terminal cup, or mounted to an inside wall of the enclosure. It sends low-frequency sounds to the woofer, high-frequency sounds to the tweeter and, if applicable, mid-frequency sounds to the midrange driver. Make sure all wires are secure and connected. Look for components on the network that look burnt, "bulged, " or abnormal. If only one loudspeaker is exhibiting the problem, and you're confident that it's not caused by too little power/too much power/excessive equalization, see solutions for Problems 1 and 2. WIRING DIAGRAM YEL/BLK HIGH-FREQUENCY TRANSDUCER 338035-001 ­ GRN/BLK GRN + EXPLODED VIEW 11 (8) 7 5 6 8 ­ + GRN/BLK GRN ­ YEL + LOW-FREQUENCY TRANSDUCERS (2) 339802-001 HK6900 Cabinet ­ Not for Sale CROSSOVER NETWORK 339815-001 10 14 (8) TO SERVICE THE HK6900 1. Remove all (8) rubber grille retainers; this can be accomplished by carefully pulling them out of their cavities with long-nosed pliers or similar tool. Remove the (8) Phillips screws that are now exposed. Carefully separate the front baffle, with tweeter attached, from the cabinet. 16 (4) 15 (8) 9 (2) 12 13 15 (4) ITEM NO. 12. DESCRIPTION Owner's Manual Warranty Card End Pads Outer Carton Tweeter Tweeter Hold-Down Bar Front Faceplate Faceplate Gasket Woofer Grille Grille Retainer Port Tube QTY. 339777-001 339778-001 339813-001 339812-001 338035-001 338059-001 350402-001 339774-001 339802-001 339803-001 338535-002 70515-05 ITEM NO. [. . . ] 12. DESCRIPTION Owner's Manual Warranty Card End Pads Outer Carton Tweeter Tweeter Hold-Down Bar Front Faceplate Faceplate Gasket Woofer Grille Grille Retainer Port Tube QTY. 339777-001 339778-001 339813-001 339812-001 338035-001 338059-001 350402-001 339774-001 339802-001 339803-001 338535-002 70515-05 ITEM NO. [. . . ]