Harman Kardon BassLink Service manual

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Models:

BassLink BassLink

(Remote Level Cont rol Ready)

BassLink X

Powered Automotive Subwoofer

SERVICE MANUAL

Infinity Systems, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797

Rev 2 7/2003

Contents

ALL MODELS BASSLINK

SPECIFICATIONS …………………………………………..……………2

CONNECTIONS/APPLICATIONS ………………………………………3

TUNING BASSLINK…………………………………………………….…6

TROUBLESHOOTING ……………………………………………………7

TEST SETUP PROCEDURE ……………..………..……………………8

BASSLINK (Original version without Remote Level Control jack)

SERVICE BULLETIN INF2000-03 ………………………………………10

EXPLODED VIEW …………………………………………….…..………11

MECHANICAL PARTS LIST ……………….………………………….…12

BLOCK DIAGRAM …………..……………..………….………………….13

PCB DRAWINGS …………………………….……………………………14

ELECTRICAL PARTS LIST ………………………………………………24

SCHEMATICS …………………………………………………………..…29

PACKAGING …………………………………………………………….…31

BASSLINK or BASSLINK X (Versions with Remote Level Control jack)

SERVICE BULLETIN INF2003-01 ………………………………………33

EXPLODED VIEW ………………………….…………………..…………34

MECHANICAL PARTS LIST …………….….……………………………35

BLOCK DIAGRAM ………………………..………….…………………...36

PCB DRAWINGS …………………………….……………………………37

ELECTRICAL PARTS LIST ………………………………………………44

SCHEMATICS …………………………………………………………..…50

PACKAGING …………………………………………………………….…54

ALL MODELS BASSLINK

INTEGRATED CIRCUIT DIAGRAMS ………………………..…………55

Basslink/Basslink X

BASSLINK/BASSLINK w/ Remote Level Control/BASSLINK X

Amplifier Power: 200W RMS @10% THD

Frequency Response: 20Hz – 120Hz THD @ 30W 1.0% Input Sensitivity: 50mV – 4V Line-Level Input

Maximum Input Sensitivity 7mV Line-Level Input

(Gain level @ Max) 120mV Universal Interface

Crossover Frequency: 50Hz – 120Hz Crossover Slope: 12dB/octave Bass Boost: –6 to +3 dB @ 40Hz Signal-Noise Ratio 65dB (Wide band w/ 22K LPF)

Max Gain Level Noise 3.0 mV Basslink

(Level pot Max.) 1.8 mV Basslink w/ Remote Level Control

Max Gain Level Noise 2.0 mV Basslink

(Level pot Min.) 1.7 mV Basslink w/ Remote Level Control

Auto On/Off Time From 1 1/2 to 5 min.

Gain boost (min to max) 9.0 dB Fuse: 25A Basslink

Specifications

120W RMS @1% THD

1V – 16V Universal Interface

1.8 mV Basslink X

1.7 mV Basslink X

(depending on last input signal level)

20A Basslink w/ Remote Level Control 20A Basslink X

Maximum Current Draw: 12A Quiescent Current Draw: <800 mA Protection Circuits:

Over/Under voltage 17.5, 8.5 VDC Temperature 95° C Short Circuit w/ 0.1 W resistor DC Offset Yes

Dimensions: 14-1/2" x 12-1/2" x 8-1/2" (L x W x H)

(369mm x 318mm x 216mm)

Weight 16 lbs./7.2kg

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notice.

Connect power to BassLink, as shown in Figure 5. Also observe these installation tips:

• Use at least #12 AWG wire for the +BATT (+12 Vdc) and GND (ground) connections. If needed, use at least a #20 AWG wire for the REM (remote) connection.

• Route all power wires through a grommet in the vehicle’s firewall. If a factory grommet is unavailable, install one.

• Connect a short GND wire from BassLink to the nearest bare metal surface. For a good connection, scrape away paint from the metal surface and use a screw with a lock (star) washer.

Figure 5. Power connections for BassLink.

• Install a fuse holder with a 20 A fuse within 18" of the battery + terminal (see Figure 5).

• The REM connection requires +5 to +12 Vdc signal for BassLink 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’s Auto Turn-On feature will sense voltage on the speaker wires to automatically turn on BassLink.

IMPORTANT:To enable BassLink’s Auto Turn-On feature, set AUTO TURN-ON to the AUTO position (see Figure 12 on page 6).

POWER CONNECTIONS

BassLink is equipped with four line-level (RCA) inputs and four speaker-level inputs. Any combination 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 audio connections for a head unit with two line-level or subwoofer (RCA) outputs.

To help you plan your installation, we included five system applications in Figures 6 through 10 on pages 3 through 5. For more system ideas, see your authorized Infinity car-audio dealer.

Note: The applications show the optional remote SUB LEVEL control which installs under the dashboard for easy in-car bass level adjustments.

APPLICATIONS

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE

GAIN

CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

Ð RIGHT +

LEFT +

RIGHT +

LEFT +

180

OFF

AUTO

TURN ON

Chassis Ground (Bare Metal)

BassLink

(right side panel)

Remote Turn-On

Fuse 20 A

Source Unit

18"

Battery

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE GAIN CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT+

LEFT+

RIGHT+

LEFT+

180

OFF

AUTO

TURNON

PHASE

REMOTE

GAIN

CONTROL

UNIVERSAL INTERFACE

REAR

FRONT

REAR

ÐRIGHT +

LEFT +

RIGHT+

LEFT +

180

OFF

AUTO

TURNON

LF Speaker

+–

RF Speaker

LR Speaker

Subwoofer or

Line-Level

Outputs

(on Source Unit)

Sub Level

Control

(optional)

RR Speaker

+–

+–+–

Source Unit

BassLink

(right side)

Sub Level Control

(optional)

+–

RCA Stereo Cables

(not supplied)

Note: For the original version Basslink without the AUTO OFF/ON switch and Optional Sub Level Control, references to these items in the Connections, Applications and Controls sections can be ignored - all other information is valid.

APPLICATIONS (CONTINUED)

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE GAIN

CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT+

LEFT+

RIGHT+

LEFT+

180

OFF

AUTO

TURNON

PHASE

REMOTE

GAIN

CONTROL

UNIVERSAL INTERFACE

REAR

FRONT

REAR

ÐRIGHT +

LEFT +

RIGHT+

LEFT +

180

OFF

AUTO

TURNON

LF Speaker

+–

RF Speaker

LR Speaker

Line-Level Outputs

(on Source Unit)

Sub Level

Control

(optional)

RFLRRR LF

RR Speaker

+–

+–+–

Source Unit

BassLink

(right side)

Sub Level Control

(optional)

+–

RCA Stereo Cables

(not supplied)

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE GAIN

CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT+

LEFT+

RIGHT+

LEFT+

180

OFF

AUTO

TURNON

PHASE

REMOTE

GAIN

CONTROL

UNIVERSAL INTERFACE

REAR

FRONT

REAR

ÐRIGHT +

LEFT +

RIGHT+

LEFT +

180

OFF

AUTO

TURNON

LF Speaker

+–

RF Speaker

LR Speaker

Line-Level

Outputs

(on Source Unit)

Sub Level

Control

(optional)

RF LF

Speaker Wires

(spliced)

RR LR

RR Speaker

+–

+–+–

Source Unit

BassLink

(right side)

Sub Level Control

(optional)

VIOLET GREEN/BLACK

VIOLET/BLACK GREEN

+–

RCA Stereo Cables (not supplied)

Splices

(not supplied)

Splices

(not supplied)

Figure 7. BassLink audio connections for a head unit equipped with four line-level (RCA) outputs.

Figure 8. BassLink audio connections for a head unit equipped with two line-level (RCA) outputs and two speaker-level outputs.

APPLICATIONS (CONTINUED)

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE GAIN CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT+

LEFT+

RIGHT+

LEFT+

180

OFF

AUTO

TURNON

PHASE

REMOTE

GAIN

CONTROL

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT +

LEFT +

RIGHT+

LEFT +

180

OFF

AUTO

TURNON

LF Speaker

+–

RF Speaker

LR Speaker

Sub Level

Control

(optional)

Speaker Wires

(spliced)

RR LR

RR Speaker

+–

+–+–

Source Unit

BassLink

(right side)

Sub Level Control

(optional)

VIOLET GREEN/BLACK

VIOLET/BLACK GREEN

Speaker Wires

(spliced)

RF LF

GRAY WHITE/BLACK

GRAY/BLACK WHITE

+–

Splices

(not supplied)

Splices

(not supplied)

+BATT

REM

GND

POWER

FUSE20A

PHASE

REMOTE

GAIN

CONTROL

SERVO

UNIVERSAL INTERFACE

REAR

FRONT

FRONT REAR

ÐRIGHT+

LEFT+

RIGHT+

LEFT+

180

OFF

AUTO

TURNON

PHASE

REMOTE

GAIN

CONTROL

UNIVERSAL INTERFACE

FRONT

REAR

ÐRIGHT +

LEFT +

RIGHT+

LEFT +

180

OFF

AUTO

TURNON

REAR

L Speaker

+–

R Speaker

Sub Level

Control

(optional)

Speaker Wires

(spliced)

R L

+–

Source Unit

BassLink

(right side)

Sub Level Control

(optional)

GRAY WHITE/BLACK

GRAY/BLACK WHITE

+–

Splices

(not supplied)

Splices

(not supplied)

Figure 9. BassLink audio connections for a head unit equipped with four speaker-level outputs.

Figure 10. BassLink audio connections for a head unit equipped with two speaker-level outputs.

CONTROLS AND FUNCTIONS

Power

Gain

Min Max

50 Hz

Crossover

120 Hz

Bass Boost

-6 (dB) +3

(Blue on Basslink X)

TUNING BASSLINK

BassLink provides several controls and indicators that simplify sonic integration with virtually any vehicle’s unique acoustic properties. They are located on the front and side panels, as shown in Figures 11 and 12.

Figure 11. BassLink controls on the front panel.

POWER LED:This indicator will glow red when

BassLink is operational.

GAIN Control: Use this control to adjust the relative volume (loudness) of BassLink with respect to the other speakers in the vehicle.

CROSSOVER: Use this control to adjust the amount of high-frequency information present in BassLink’s output. A lower value signifies less high frequencies will be amplified.

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 12. BassLink controls on right side panel.

FRONT REAR

Ð RIGHT +

REAR

LEFT +

UNIVERSAL INTERFACE

RIGHT +

FRONT

LEFT +

AUTO

PHASE

TURN ON

OFF

180

AUTO

REMOTE

GAIN

CONTROL

SERVO

FUSE20A

POWER

GND

REM

+BATT

PHASE Control: Use this switch to reverse the phase of BassLink’s output with respect to its input. Choose the position (0° or 180°) that sounds the best.

Note: Depending on BassLink’s orientation and location in a vehicle, reversing the phase may 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’s 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 GAIN CONTROL: Use this RJ-11 jack to connect the optional remote SUB LEVEL control.

SERVO LED:This indicator glows green 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 setup (see Tuning BassLink). 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.

1. Make sure the head unit is off and its volume control is set to minimum.

2. On BassLink’s front panel, initially set all controls to their midpoint positions, as shown in Figure 11. On BassLink’s side panel, initially set PHASE to 0° and AUTO TURN-ON to AUTO, as shown in FIgure 12.

3. Turn on the head unit and play a favorite music track that has substantial bass. Set the volume control to 75 percent of the total output (approximately 3 o’clock on rotary controls).

4. Adjust the GAIN control clockwise until the SERVO LED (on BassLink’s side panel) begins to flash with each bass note but doesn’t stay lit continuously.

5. Listen to your system, making a mental note of the amount of upper bass being reproduced.

6. 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.

7. 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 when seated in the normal listening position.

8. Adjust the BASS-BOOST control clockwise or counterclockwise to suit your taste.

9. Recheck the SERVO LED to make sure it’s 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.

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.

Basslink/Basslink X

TROUBLESHOOTING

• 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.

• PROBLEM:

BassLink 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 on the previous page).

2. Bass is set too high. Readjust BASS BOOST control (see Tuning BassLink on the previous page).

3. Head-unit output is distorted or blown. See your authorized Infinity car audio dealer.

APPLICABLE TO BASSLINK WITH LEVEL

CONTROL JACK AND BASSLINK X ONLY:

• PROBLEM:

BassLink 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’s side panel, slide AUTO TURN-ON to OFF.

• PROBLEM:

BassLink’s 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 will remain on another 5 to 10 minutes after sensing that audio signals are not present before shutting down. If you prefer immediate shutdown, set AUTO TURN-OFF to OFF.

• PROBLEM:

No output from BassLink 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 section)

BassLink/BassLink X

Equipment needed:

• Function/signal generator/sweep generator

• Integrated/Power Amplifier (capable of driving 2 ohm loads)

• 14 volt DC power supply 20A or greater with current-limit protection

• Multimeter

• RCA cable, Universal Interface molex connector, Speaker cables

General Unit Function (UUT = Unit Under Test)

Switch/Controls:

GAIN control full counterclockwise (Min) CROSSOVER full clockwise (120 Hz) BASS BOOST at center (12 o’clock) PHASE, AUTO-ON - either position

1) From the signal generator, connect one line level (RCA) cable to the Basslink Line Level Input jacks (Front,L/R) on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs.

2) Turn on generator, adjust to 100mV, 40 Hz.

3) Attach 14v DC source to Power terminals on UUT, including +14v to Remote connection. Red LED should ON. Turn LEVEL control full clockwise (Max)

4) Bass response should be heard and felt. Green servo light should not be illuminated.

5) Adjust the generator to 175mV, 40 Hz. Green servo light should turn ON. DO NOT DRIVE THE BASSLINK FOR MORE THAN A FEW SECONDS AT THIS LEVEL OR THE UUT MAY GO INTO THERMAL PROTECTION

6) Turn off generator, turn GAIN control fully counterclockwise, disconnect RCA cable.

7) Optional: Attach the Universal Interface molex connector (Infinity part# 162A600D001) to the Basslink Universal Interface Jack (Front,L/R) on the UUT. Both front/rear negative wires should be twisted and connected together; positive wires should be treated likewise. Cables should be connected to an integrated amplifier fed by the signal generator.

8) Turn on generator and adjust so that speaker level input at the amplifier is 275mV, 40 Hz. Turn GAIN control full clockwise.

9) Bass response should be heard and felt. Green servo light should not be illuminated.

10) Adjust the generator to 500mV, 40 Hz. Green servo light should be ON. DO NOT DRIVE THE BASSLINK FOR MORE THAN A FEW SECONDS AT THIS LEVEL OR THE UUT MAY GO INTO THERMAL PROTECTION

Sweep Function

1) Follow steps 1-3 above, using a sweep generator as a signal source – adjust the generator to 50mV, 40 Hz.

2) Sweep generator from 20Hz to 300Hz. Listen for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, test woofer according to the instructions below.

Driver Function

1) Remove amplifier from the enclosure; (instructions in bulletin INF2000-03 page 8); detach connector M101 two-wire molex on the main amplifier PCB.

2) Check DC resistance of woofer; it should be 2.3 ohms ±10%

3) Connect a pair of speaker cables to woofer terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 6.0V.

4) Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.

SIGNAL

GENERATOR

AMPLIFIER

AC VOLT

METER (10V)

BASSLINK

UNDER TEST

00432

14V DC

Test Set Up Procedure

Basslink

(Original version without remote

level control jack)

Service Bulletin

Service Bulletin INF2000-03 - October 2000 Warranty labor rate: MINOR repair

To: All Infinity Service Centers

Model: Basslink (version w/o AUTO-ON switch or REMOTE GAIN)

Subject: Unit will not turn off

In the event you receive a Basslink subwoofer with the complaint: “The unit will not turn off, even when the audio signal is removed, and the Remote power connection is switched off” (indicated by the Basslink’s red LED remaining ON), perform the following modification:

1) Set the unit on a padded surface and remove all external cables.

2) On the amplifier faceplate, remove only the (14) Phillips mounting screws as shown in Figure 1.

3) Remove the amplifier assembly from the enclosure. If the amp is turned around and supported correctly, no other connectors need to be unplugged.

4) Add these two components:

1.0 Meg ohm 1/8W resistor, Infinity part# 299-1M

.01uf, 100v mylar capacitor, Infinity part# 140-PF2A103F Solder these parts in parallel (See Figure 2); and attach to original location shown (See Figure 3), which is in a narrow cavity between main power supply caps and transformer T101. There are two empty pads on the PCB for these parts with marked designators R272 and C273.

5) New gaskets must be added to the amplifier mating surface; two pairs are required, four gaskets total:

Infinity part# 723D150 and #723C150

6) Replace the amplifier assembly and tighten all mounting screws. Use caution; a hand tool is

recommended to prevent stripping the threads in the enclosure.

7) Connect +12v to the unit and a signal cable, after the unit cycles ON, (red LED should be lit), remove the

signal and remote connection only (or shut off the music source if using the Universal Interface). Unit should turn OFF after 3 - 10 minutes (as indicated by the red LED turning OFF).

Models Serial number Status Action

Add:

Basslink

All serial numbers affected

(version w/o AUTO-ON switch or REMOTE GAIN)

The unit will not turn off when the

signal is removed, and Remote

connection is switched off

R272 1 Meg ohm 1/8W Resistor

C273 .01uf 100v Mylar Capacitor

New amplifier gaskets #723D150, 723C150

Infinity Systems Inc. 250 Crossways Park Dr. Woodbury, New York 11797 (516) 496-3400

BassLink

Exploded View

NOTE: THIS DRAWING AND MECHANI CA L PARTS LIST ARE FOR REFERENCE PURPOSES ONLY; THE MAIN ENCLOSURE OF THE BASSLINK SUBWOOFER, WITH THE EXCEPTION OF THE AMPLIFIER ASSEMBLY, IS

NON-SERVICABLE.

COMPLETE ENCLOSURE W/ DRIVERS PART# BASSLINK/ASSEMBLY

00425