Infinity-Basslink4SC caractsub 电路图.pdf

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1、 BassLink 4sc Amplifier Expansion Module SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 12/2005 RadioFans.CN 收音机爱 好者资料库 - CONTENTS - SPECIFICATIONS .1 CONNECTIONS.2 CONTROLS AND FUNCTIONS.3 SETTING LEVELS/PHANTOM CENTER CHANNEL.4 BASIC TROUBLESHOOTING.6 AM

2、PLIFIER BLOCK DIAGRAM.7 ELECTRICAL PARTS LIST . .8 P.C.B. DRAWINGS.12 IC/TRANSISTOR PINOUTS. 16 SCHEMATICS.17 BassLink 4sc Specifications Amplifier Power: 35W x 4 channels at 4 ohms 50W x 4 channels at 2 ohms Frequency Response: 90Hz to 47kHz Fuse: 30A Input Sensitivity: 100mV to 6V line-level input

3、 1V to 16V universal interface Crossover Frequency: Fixed 80Hz high-pass Crossover Slope: 12dB per octave Channel Separation 50dB DC Offset 30mV Operating Voltages 8 - 16 VDC Current Remote 3.5mA Quiescent 800mA 4 ohm rated power 19 Amps 2 ohm rated power 34 Amps Infinity continually strives to upda

4、te 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. Amplifier Expansion Module BassLink 4sc 1 RadioFans.CN 收音机爱 好者资料库 BassLink 4sc 3 CONNECTIONS Note: In order for the Phanto

5、m Center circuit to operate properly, the speakers and input wires MUST be connected in proper polarity! SPEAKER CONNECTIONS Connect the speakers to the FRONT and REAR screw terminals, observing proper polarity (Figure 3). INPUT CONNECTIONS You must connect full-range signal to all four inputs on Ba

6、ssLink II (if you are using the 4sc). Do not connect a subwoofer output to any of the inputs if you are using the 4sc. Connect the input signal wires according to Figures 3a through 3d. If your source unit provides only speaker-level output wires, connect those wires to the Universal Interface conne

7、ctions as shown in Figures 3a or 3b. If your source unit provides line-level outputs with RCA-type connectors, connect the signal cables to the FRONT and REAR LINE LEVEL inputs as shown in Figure 3c or 3d. Note: If your source unit provides two line-level outputs and two speaker-level outputs, you m

8、ay connect the line-level output to the appropriate (front or rear) RCA-type input and the speaker- level outputs to the other (front or rear) Universal Interface connector. BassLink II Remote Level Control Remote Level Control 4-Channel Line-Level Outputs (from Source Unit) 3d. 3c.3a. 3b. LF LRRR R

9、F Source Unit Remote Level Control Remote Level Control Remote Level Control 2-Channel Line-Level Outputs (from Source Unit) 2-Channel Speaker Outputs (from Source Unit) 4-Channel Speaker Outputs (from Source Unit) Rear Front Figure 3. Amplifier Expansion Module BassLink 4sc 2 RadioFans.CN 收音机爱 好者资料

10、库 CONTROLS ANDFUNCTIONS REMOTE CONTROL SUB LEVEL: Use this control to adjust the amount of bass to suit your preference. PHANTOM CENTER: LEFT: Slide the switch to this position to provide a phantom center for front left seating position. OFF: Slide the switch to this position to turn off Phantom Cen

11、ter processing. RIGHT: Slide the switch to this position to provide a phantom center for front right seating position. Note: Once you have chosen the best Phantom Center switch position and made the necessary adjustments to the Front Gain and Rear Gain controls and set the Subwoofer Level control an

12、d Phase switch, you wont need to make any further adjustments on the BassLink II or the 4sc. BASSLINK 4sc PHANTOM CENTER: Use this switch to select the proper adjustment of the Phantom Center circuit according to your car and your preference. FRONT/REAR GAIN: Use these to adjust the levels of the fr

13、ont and rear speakers. POWER LED:This indicator will glow blue when BassLink II and 4sc are operational. BASSLINK II POWER LED:This indicator will glow blue when BassLink II is operational. GAIN Control: Use this control to adjust the relative volume (loudness) of BassLink II with respect to the oth

14、er speakers in the vehicle. CROSSOVER: Use this control to adjust the amount of high-frequency information present in BassLink IIs output. 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 bet

15、ween 6dB and +3dB, according to your preference. PHASE Control: Use this switch to reverse the phase of BassLink IIs output with respect to its input. AUTO TURN ON: For speaker-level connections, use this switch to activate (or deactivate) BassLink IIs automatic turn-on circuit. SERVO LED:This indic

16、ator glows blue when the subwoofer is at maximum excursion and the amplifier is modifying the output to maintain maximum performance. For more information about using the controls, see “Tuning BassLink II and 4sc” on page 5. Figure 4. REMOTE LEVEL controls.Figure 5. BassLink 4sc controls.Figure 6. B

17、assLink II controls on the front panel. Figure 7. Amplifier Expansion Module BassLink 4sc 3 TUNINGBASSLINKII AND4SC SETTING THE FRONT SPEAKER AND SUBWOOFER LEVELS Note: Refer to page 4, ”Controls and Functions, ” for the location of controls. 1. Turn on the audio system and verify (using the Balance

18、 and Fader controls) that the speakers and input channels are connected properly when the Balance control is turned to the left, only the left speakers should play, and when the control is turned to the right, only the right speakers should play. BassLink IIs subwoofer should play regardless of the

19、Fader or Balance controls position. 2. Turn the Rear Gain (located on the 4scs end panel) and BassLink IIs Gain control (located on BassLink IIs front panel) all the way down. Turn the Front Gain (located on the 4scs end panel) to 1/4 volume. Only the front speakers should be playing. Additionally,

20、turn BassLink IIs Crossover control and Bass Boost control to their midpoint positions and set BassLink IIs phase control to the 0 position. 3. Play a dynamic music track with substantial bass content Track 5 or 9 on the Phantom Center Setup CD is suitable and turn the source units volume control to

21、 3/4 volume. 4. Turn the Front Gain control up until you hear slight distortion in the music (fuzzy or crackling sounds). Then reduce the Front Gain control slightly until the distortion is no longer present. 5. Turn the Sub Level control (on the remote level control) to its maximum output setting (

22、fully clockwise). 6. While listening to the same track that you used in step 3, turn BassLink IIs Gain control clockwise until the servo light (located on BassLink IIs end panel) begins to flash with each bass note but doesnt stay lit continuously. 7.While sitting in the drivers seat, listen to your

23、 system, making a mental note of the amount of upper bass being reproduced. 8. Switch the Phase control to the 180 position and listen again for upper bass content. There may be more upper bass, less upper bass or there may be no change. The position that provides the most upper bass is correct, but

24、 choose either setting according to your preference. 9. Adjust the Crossover control until you hear only low-frequency information coming from BassLink IIs woofer. You should use the highest (clockwise) position possible that doesnt allow any vocal information to be audible from BassLink IIs woofer

25、(when you listen in the drivers position). 10.Adjust the Bass Boost control clockwise or counterclockwise to suit your preference. ABOUT THE PHANTOM CENTER CIRCUIT Note: In order for the Phantom Center to work properly, the front speakers MUST be connected in correct polarity. Additionally, some fac

26、tory- installed audio systems use extensive and non-defeatable equalization and channel delay, which may diminish the effect of the Phantom Center circuit. The Phantom Center circuit provides four tuning selections: Off, 1, 2 and 3. The three settings process the audio signal differently and provide

27、 optimization for several different car sizes and front speaker mounting locations. The chart below indicates switch positions that will probably sound best for a variety of car sizes and speaker locations but there is no correct setting. You should choose the one you like best. Note: The Phantom Ce

28、nter circuit affects the midrange speaker only in switch position 1, but may affect the separate tweeter as well in switch positions 2 and 3, depending on the tweeters cutoff frequency. If you have separate tweeters mounted in the tops of the doors or in the dashboard, and the chart indicates two po

29、ssible switch positions, the second position may be the better choice. Midrange Speaker Location car sizedoorsdashkick panel small22 or 33 mid-size1 or 22 or 33 large122 or 3 Using the Phantom Center Setup CD (included with your BassLink 4sc) youll listen to some instructions, a spoken setup track a

30、nd several music selections to determine the best adjustment for your system. The first four tracks are spoken tracks, with Track 3 being the most important of those tracks. Portions of Track 3 have been recorded through the equivalent of the Phantom Center circuit. Listen to Track 3, “Spoken Setup

31、Track” , and choose the switch position that provides the best illusion of a person speaking halfway between the front speakers. Track 3: 0:00-0:10 Switch in the Off position 0:11-0:21Switch position 1 0:22-0:33 Switch position 2 0:34-0:47 Switch position 3 0:48-0:60 Rapid switching between the thre

32、e positions Amplifier Expansion Module BassLink 4sc 4 Tracks 5 through 16 are music tracks. There are three excerpts of songs and each excerpt is recorded four times; once with no processing (switch in the Off position), once through switch position 1, once through switch position 2 and once through

33、 switch position 3. Using the music tracks, choose the switch position that distributes the sound best between the right and left speakers. You can use the following list of tracks as a guide. TUNINGBASSLINKII AND4SC(CONTINUED) PHANTOM CENTER SETUP CD Track 1Introduction Track 2Instructions for Trac

34、k 3 Track 3Spoken Setup Track Track 4Instructions for Music Tracks Track 5Lonely Savior (no processing) Track 6Lonely Savior (switch position 1) Track 7Lonely Savior (switch position 2) Track 8Lonely Savior (switch position 3) Track 9Another Time, Another Place (no processing) Track 10Another Time,

35、Another Place (switch position 1) Track 11Another Time, Another Place (switch position 2) Track 12Another Time, Another Place (switch position 3) Track 13Cinderellas Revelation (no processing) Track 14Cinderellas Revelation (switch position 1) Track 15Cinderellas Revelation (switch position 2) Track

36、 16Cinderellas Revelation (switch position 3) Track 17Conclusion Track 18Lonely Savior: Ken Birmingham Track 19Another Time, Another Place: Mike Christian Track 20Cinderellas Revelation: Joe Chinnici SETTING THE PHANTOM CENTER CIRCUIT 1. Before you begin, set the Phantom switch on the remote control

37、 for the seat in which you are sitting. Set the Phantom Center switch on the 4sc in the Off position. Turn the Rear Gain control on the 4sc all the way down (counter- clockwise) and make sure no sound is coming from the rear speakers. 2. Insert the Phantom Center Setup CD into your CD player. 3. Fol

38、low the spoken instructions on the setup CD. 4. Once you have chosen the switch position you like best using Tracks 117, stop the CD and move the Phantom Center switch on the 4sc to the position you have chosen. You can use Track 17 and the music selections that follow (Tracks 1820) to check your wo

39、rk. ADDING THE SOUND FROM THE REAR SPEAKERS With music playing, turn the Rear Gain control clockwise until sound from the rear speakers is clearly audible but not so loud that it makes the music seem to come from the back of the car. Amplifier Expansion Module BassLink 4sc 5 TROUBLESHOOTING PROBLEM:

40、 BassLink II and 4sc Power LEDs are not lit. CAUSES and SOLUTIONS: 1. Poor or improper power connection. Check power, ground and remote connections. Check speaker level input for proper connections (see No Output). 2. Blown or improperly installed fuse. Check main battery fuse and replace if necessa

41、ry. Check fuse on BassLink II and 4sc. PROBLEM: 4sc Power LED not lit but BassLink II Power LED is. CAUSES and SOLUTIONS: 1. Improper power connection between BassLink 4sc and BassLink II. Check Power Connector (see Installation, Figure 2). 2. Improper signal connection between BassLink 4sc and Bass

42、Link II. Check gray ribbon signal cable connection to the 4sc (see Installation, Figure 2). 3. Blown or improperly installed BassLink 4sc fuse. Check fuse and replace if necessary. PROBLEM: BassLink 4sc Power LED lit but no sound from one or all speakers. CAUSES and SOLUTIONS: 1. Improper input sign

43、al connections. Check all input connections on BassLink II and source unit. 2. Damaged speaker wire or improper speaker connections. Check speakers and wiring; change if necessary. 3. Improper signal connections between BassLink 4sc and BassLink II. Check gray ribbon signal cable connection to 4sc (

44、see Installation, Figure 2). PROBLEM: Music sounds distorted. CAUSES and SOLUTIONS: 1. Gain levels are set too high or head unit volume is too high. Reduce volume and/or Gain Levels. 2. Tone Controls on head unit misadjusted. Check controls and adjust as necessary. PROBLEM: No output from BassLink 4

45、sc and BassLink II. CAUSES and SOLUTIONS: Input connections are improperly wired. Verify all connections (see Figures 4 and 5). PROBLEM: No output from BassLink II when head-unit fader control is set to front or rear (in a 4-channel connection). CAUSE and SOLUTION: Input connections are improperly w

46、ired. Verify all connections (see Connections, on page 3). PROBLEM: BassLink II turns on before head unit is completely 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 AUTO TURN ON to

47、 OFF. It will be necessary to connect the Remote lead to a switched ignition voltage source. PROBLEM: BassLink IIs BassLink 4sc POWER LED remains on after head unit is turned off. CAUSE and SOLUTION: For speaker-level connections, this is normal operation when AUTO TURN ON is set to ON. BassLink II

48、and BassLink 4sc will remain on for another 5 to 10 minutes after sensing that audio signals are not present before shutting down. Amplifier Expansion Module BassLink 4sc 6 123456 A B C D 654321 D C B A Block Diagram Bass Link 4sc From nine pin connector inside BassLink Gain Control Front Gain Contr

49、ol Rear HP filter 80Hz 12dB Left HP filter 80Hz 12dB Right HP filter 80Hz 12dB Left HP filter 80Hz 12dB Right Phantom Circuit 3 pos swtw/off 200Hz/400Hz/800Hz/off Ao SPEAKER 2 ohm/4 ohm L/OFF/R Ao SPEAKER 2 ohm/4 ohm Ao SPEAKER 2 ohm/4 ohm Ao SPEAKER 2 ohm/4 ohm Channel select Remote control Circuit Remote control Amplifier Expansion Module BassLink 4sc 7 BASS