HarmanKardon-BassLinkMK2-spk-sm维修电路原理图.pdf

BassLink II Powered Automotive Subwoofer SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 8/2005 RadioFans.CN - CONTENTS - SPECIFICATIONS .1 PACKAGING.2 CONNECTIONS/APPLICATIONS.3 CONTROLS AND FUNCTIONS.6 BASIC TROUBLESHOOTING.8 DISASSEMBLY PROCEDURE.9 EXPLODED VIEW.10 AMPLIFIER BLOCK DIAGRAM11 ELECTRICAL PARTS LIST . 12 P.C.B. DRAWINGS.18 IC/TRANSISTOR PINOUTS. 30 SCHEMATICS.31 Basslink II Specifications Output Power (14.4V supply) 250W RMS 1% THD Type of Amplifier AB Frequency response: 20Hz 120Hz Maximum input signal: 4.0V Maximum sensitivity: 50mV to 4V Line-level input 1V to 16V High-level input Input Impedance 20K Idle Current 100dB (A-weighted ref to full power) Crossover Type Fixed LP 12dB per octave Crossover Range Variable 50 120 Hz Bass EQ 40Hz (-6dB to +3dB) Phase Control 0 and 180 Min Current Draw (Idle) <800mA Remote Current Draw <3.5mA Max Current Draw 26A DC Offset <30mV Bass Boost -6dB to +3dB 40Hz Auto Turn-On 2 -10min (Time to turn Off) Operating Voltage 10 16 VDC Overall Dimensions (L x W x H): 15-1/16 x 8-3/4 x 15-5/16 (383mm x 223mm x 389mm) Sub Level Control (w/ housing): 2-3/16 x 2-5/16 x 7/8 (56mm x 59mm x 23mm) Sub Level Control (w/o housing): 2-3/16 x 1-5/16 x 3/4 (56mm x 34mm x 20mm) Fuse: 25A Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related JBL publications are therefore subject to change without notice. Powered SubwooferPowered Subwoofer Basslink IIBasslink II RadioFans.CN Powered SubwooferPowered Subwoofer Basslink IIBasslink II RadioFans.CN Make Power, Ground and Remote turn-on connections as shown in Figure 5. Observe the following installation tips: Use #8 AWG wire for the +BATT (+12Vdc) and GND (ground) connections. If needed, use at least a #20 AWG wire for the REM (remote) connection. If you pass the power or remote wire through the vehicles firewall or other metal obstruction, it must be insulated with a rubber grommet. If a factory-installed grommet is unavailable, be sure to install a rubber grommet to protect the wires. Connect a short GND wire from BassLink II to the nearest bare metal surface. For a good connection, sand away paint from the metal surface and use a screw with a (star) lock washer. Figure 5. Power connections for BassLink II. Install a fuse holder with a 25A fuse within 18 of the battery + terminal (see Figure 5). The REM connection requires +5 to +12 Vdc for BassLink II to turn on remotely. Most head units with preamp outputs provide this remote voltage signal. For speaker-level applications, a remote connection is not required, since BassLink IIs AutoTurn On feature will sense voltage on the speaker wires to automatically turn on BassLink II. IMPORTANT: To enable BassLink IIs Auto Turn On feature, set AUTO TURN ON to the AUTO position (see Figure 15 on page 6). POWERCONNECTIONS BassLink II is equipped with four line-level (RCA) inputs and four speaker-level inputs. Any combina- tion of line-level and speaker-level inputs may be used to provide nonfading bass when connected to a head unit with four outputs. Figure 6. BassLink II audio connections for a head unit with two line-level or subwoofer (RCA) outputs. To help you plan your installation, we have included three system applications in Figures 6 through 8. For more system ideas, see your authorized Infinity car audio dealer. Note: The applications show the REMOTE LEVEL control, which installs under the dashboard for easy in-car bass level adjustments (see page 7). APPLICATIONS Powered SubwooferPowered Subwoofer Basslink IIBasslink II 3 Figure 7. BassLink II audio connections for a head unit equipped with four line-level (RCA) outputs. APPLICATIONS(CONTINUED) Figure 8. BassLink II audio connections for a head unit equipped with four speaker-level outputs. LF Speaker +? RF Speaker LR SpeakerRR Speaker +? +?+? Source Unit BassLink II? (right side) +? RCA Stereo Cables? (not supplied) BassLink II? (right side) Powered SubwooferPowered Subwoofer Basslink IIBasslink II 4 DESCRIPTION The BassLink 4sc is a plug-and-play amplifier designed to make upgrading your system easy. The BassLink 4sc is designed to slide into an available slot in the BassLink II. Unlike an additional outboard amplifier, the BassLink 4sc doesnt require any additional space. The BassLink 4sc also includes a Phantom Center effect, which creates the illusion of a center channel even if no center speaker is installed. INSTALLATION 1. Remove the wiring cover from BassLink II. 2. Remove the eight screws that hold the AMPLIFIER DOCK cover panel in place (Figure 9). Save the screws. 3. Remove the screw that attaches the two wiring harnesses and connectors to the panel. 4. Connect the wiring harness connectors to the appropriate connectors on the BassLink 4scs circuit board. See Figure 10. 5. Insert the amplifier and install the eight screws that were removed in Step 2. See Figure 10. 6. Install 40A fuse at the battery. Note: All four inputs on BassLink II must be used in order for the BassLink 4sc amplifier to function properly. Figure 9. Figure 10. BASSLINK4SCINSTALLATION CONNECTIONS Connect the front and rear speakers as shown in Figure 11. Figure 11. SETTINGS The BassLink 4sc has input level control for the front and rear speakers and PHANTOM CENTER controls. For proper setup, please refer to the full BassLink 4sc owners manual. Figure 12. APPLICATION Figure 13. Typical installation using all four speaker- level inputs from the source unit. LeftFrontRight LeftRearRight + ? ? + + + LeftFrontRight LeftRearRight + ? ? + + + BassLink II? (right side) LF + ? RF ?+ LR + ? RR ?+ Powered SubwooferPowered Subwoofer Basslink IIBasslink II 5 6 BassLink II provides several controls and indica- tors that simplify sonic integration with virtually any vehicles unique acoustic properties. They are located on the front and side panels, as shown in Figures 14 and 15. Figure 14. BassLink II controls on the front panel. POWER LED:This indicator will glow blue when BassLink II is operational. GAIN Control: Use this control to adjust the rela- tive volume (loudness) of BassLink II with respect to the other speakers in the vehicle. CROSSOVER: Use this control to adjust the amount of high-frequency information present in BassLink IIs output. A lower value means more of the high frequencies are filtered out. BASS BOOST: Use this control to correct any perceived peak or dip in the bass response (typically around 40Hz in most vehicles). Set the control to any value between 6dB and +3dB, according to what sounds best. Figure 15. BassLink II controls on right-side panel. PHASE Control: Use this switch to reverse the phase of BassLink IIs output with respect to its input. Choose the position (0 or 180) that sounds the best. Note: Depending on BassLink IIs orientation and location in a vehicle, reversing the phase may, or may not, increase or decrease the amount of upper bass being reproduced. AUTO TURN ON: For speaker-level connections, use this switch to activate (or deactivate) BassLink IIs automatic turn-on circuit. For most speaker-level applications, slide the switch to AUTO. However, if your system produces false turn-on signals or uses a remote (REM) connection, slide the switch to OFF . REMOTE LEVEL Control: Use this RJ11 jack to connect the REMOTE LEVEL control (see page 7). SERVO LED:This indicator glows blue when the subwoofer is at maximum excursion and the amplifier is modifying the output to maintain maximum performance. Be sure to monitor this indicator during BassLink II setup (see Tuning BassLink II). When properly tuned, the SERVO LED should light momentarily during high-level bass transients. Avoid adjustments that cause the LED to remain lit for extended periods. CONTROLS ANDFUNCTIONS 1. Unplug the RJ11 cable that connects the REMOTE LEVEL control to BassLink II. 2. Make sure the head unit is off and its volume control is set to minimum. 3. On BassLink IIs front panel, initially set all controls to their midpoint positions, as shown in Figure 14. On BassLink IIs side panel, initially set PHASE to 0 , as shown in Figure 15. 4. Turn on the head unit and play a favorite music track that has substantial bass. Set the head units volume control to 75 percent of the total output (approximately 3 oclock on rotary controls). 5. Adjust the GAIN control clockwise until the SERVO LED (on BassLink IIs side panel) begins to flash with each bass note but doesnt stay lit continuously. 6. Listen to your system, making a mental note of the amount of upper bass being reproduced. 7. Switch the PHASE control to 180 and listen again for upper bass content. There may be more upper bass, less upper bass, or no change at all. The position that provides the most upper bass is correct, but choose either setting according to your taste. 8. Adjust the CROSSOVER control clockwise or counterclockwise until you hear only low- frequency information. For example, you should NOT hear any vocals coming from BassLink II when seated in the normal listen- ing position. 9. Adjust the BASS BOOST control clockwise or counterclockwise to suit your taste. 10. Recheck the SERVO LED to make sure its flashing in time with the bass but is not lit continuously. If it is lit continuously, adjust the GAIN control counterclockwise until the SERVO LED only flashes in time with the bass. 11. Reconnect the RJ11 cable between the REMOTE LEVEL control and BassLink II. You may then use the REMOTE LEVEL control to adjust the level of the bass to suit your taste and/or different program material. Note: In most cases, the above steps will provide satisfactory tuning. However, the actual process may require several readjustments of each control, since the settings will interact with each other. If necessary, consult your authorized Infinity car audio dealer for help in tuning your system. TUNINGBASSLINKII Powered SubwooferPowered Subwoofer Basslink IIBasslink II 6 The REMOTE LEVEL control is used to adjust the output level of the subwoofer. This level control allows you to reduce the subwoofer output for music with heavy bass content and increase the level for music with less bass content. PHANTOM CENTER Switch:The REMOTE LEVEL control has a three-position switch that is used when the BassLink 4sc amplifier is installed. Please refer to the BassLink 4sc owners manual for the specific operation of this switch. INSTALLATIONOPERATION CONNECTING THEREMOTE LEVEL CONTROL TOBASSLINKII The REMOTE LEVEL control may be mounted under the dash or may be dismantled and mounted in the dash for a factory appearance. UNDER-DASH MOUNTING Select a mounting location that allows easy access to the control while driving. Using the REMOTE LEVEL control as a template, mark and drill holes in the mounting surface. Attach the REMOTE LEVEL control using the mounting screws provided (Figure 16). Figure 16. Under-dash mounting of the REMOTE LEVEL control. Route the cable behind the dash or other interior panels and under the carpet. Do not route the cable outside the vehicle. Connect the RJ11 cable between the RJ11 receptacle on the BassLink II and the receptacle on the REMOTE LEVEL control (Figure 17). Figure 17. REMOTE LEVEL control electrical connection. Powered SubwooferPowered Subwoofer Basslink IIBasslink II 7 BassLink II (4sc, if installed) PROBLEM: POWER LED not lit. CAUSES and SOLUTIONS: 1. Fuse is blown and needs replacement. 2. Head unit not functioning properly. Check remote voltage, and power, ground or remote connections. PROBLEM: POWER LED is lit but there is no bass. CAUSES and SOLUTIONS: 1. Inputs are not connected. Check connections. 2. Head-unit fader control is not set properly. Adjust head-unit fader control to feed audio signals to BassLink II. PROBLEM: BassLink II sounds muddy or distorted. CAUSES and SOLUTIONS: 1. Gain is set too high and SERVO LED is lit constantly. Readjust GAIN control (see Tuning BassLink II on page 6). 2. Bass is set too high. Readjust BASS BOOST control (see Tuning BassLink II on page 6). 3. Head-unit output is distorted or blown. See your authorized Infinity car audio dealer. PROBLEM: No output from BassLink II when head-unit fader control set to front or rear (in a 4-channel connection). CAUSE and SOLUTION: Input connections are improperly wired. Verify all connections (see Applications starting on page 3). PROBLEM: BassLink II turns on before head unit is com- pletely on and produces a “thump” sound. CAUSE and SOLUTION: For speaker-level connections, head unit is producing a false turn-on signal. On BassLink IIs side panel, slide AUTOTURN ON to OFF . PROBLEM: BassLink IIs POWER LED remains on after head unit is turned off. CAUSE and SOLUTION: For speaker-level connections, this is normal operation when AUTOTURN ON is set to ON. BassLink II will remain on another 5 to 10 min- utes after sensing that audio signals are not present before shutting down. PROBLEM: BassLink II produces a loud humming noise with the system OFF when using speaker-level inputs. CAUSE and SOLUTIONS: This problem is caused by a feedback loop between your speakers and the high-level inputs of BassLink II. Choose one of the following solutions: 1. Connect a wire from the REMOTE terminal on BassLink II to the remote turn-on of your head unit or to the vehicles accessory circuit. On the control panel, slide the AUTOTURN ON switch to the OFF position. 2. Connect the supplied capacitors between each of the speaker outputs of the head unit and the speakers positive lead, as shown in Figure 18. Connect each positive lead of BassLink IIs high-level inputs to the head-unit side of the capacitors. Use one capacitor per speaker input channel. Figure 18. Connecting supplied capacitors. TROUBLESHOOTING Capacitor + Speaker wire ? from head unit To + speaker-level? input on BassLink II To + speaker lead Powered SubwooferPowered Subwoofer Basslink IIBasslink II 8 BASSLINK II DISASSEMBLY 1) Remove “Amplifier Dock” cover; (8) Phillips screws. 2) Remove (10) Phillips screws holding main heatsink/amplifier to enclosure, tapping the heatsink with a rubber mallet may be necessary to loosen it. Pull amplifier from enclosure 3) Remove single 12 pin Molex connector M300 and both pairs of FASTON terminals from the amplifier PCB; do not mix up the two pairs of red/black wires (speaker and A/B). Label if necessary. 4) With the screw cavities facing upwards on the enclosure, remove the (12) Phillips screws holding the enclosure together. 5) Using the opening of the “Amplifier Dock” as leverage, separate the enclosure halves; to completely separa