Harman Kardon SUBTS-7, SUBTS-8 Service manual

harman/kardon

SUB-TS7(HKTS 7 SUBWOOFER) SUB-TS8(HKTS 8 SUBWOOFER)

SERVICE MANUAL

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797 Rev1 10/2006

SUB-TS7/TS8 harman/kardon

CONTENTS

BASIC SPECIFICATIONS . . . . . . . . . . . . ……………………………………. . . . 1

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

CONTROLS & CONNECTIONS………... . . . . . . . . . . . ………………. ……….. 4

SPEAKER CONNECTIONS……………………….………..……. . . .. . .. . . . . . .. 6

OPERATION……. . . . . .. . . . . . . . .. ………………………………………………..9

BASIC TROUBLESHOOTING GUIDE . . . . . . . . ………………………………...10

UNIT EXPLODED VI E W. . . . …………… ……………. .. ………... . . .. .. .. . … . 11

AMPLIFI ER EXPLOD ED VIEW. . . . ………………... . .. ………... . . .. . . .. . … . 12

TEST SET-UP AND PROCEDURE. . . . . . . . ………………………….………...13

HKT S7 TECH T I P HK2004-04… …………………………………………………..14

BLOCK DIAGRAM . . . . . . . . . . . . . .. . . . . . . ……………… . . . . . . .. . . . . . . 15

PCB DRAWIN GS. . . . . . . . . . . . . . . . .. . . . . ……… . …………. . . . . .. .. . . . . . 16

ELECTRICAL PARTS LIST …………. .... . .. . . . . ………….…….. . . .. .. . . . . 20

SEMICONDUCTOR PINOUTS . . . .. .. .. .. . . . .. . ……………………..………. .24

HKTS7 SCHEMATIC DIAGRAM . . . . . .. .. ……………………………………….25

HKTS8 SCHEMATIC DIAGRAM . . . . . .. .. .. .. . . . .. . …………………………. 28

HKTS7 PACKAGING. . . . . . . . . . . . . . . . .. . . . ............................... ... .... ........... 31

HKTS8 PACKAGING. . . . . . . . . . . . . . . . .. . . . ............................... ... .... ........... 32

SPECIFICATIONS

Amplifier Power (RMS) 100 Watts Driver 10" woofer, Bass Reflex Enclosure Inputs Stereo Line Level, dedicated Subwoofer (LFE)

and Speaker Level with gold-plated binding posts

Outputs Speaker Level with gold-plated binding posts Frequency Response 35Hz – 120Hz (Filter switch ON)

35Hz – 450Hz (Filter switch OFF) Dimensions (H x W x D) 18-7/8" x 13-3/8" x 13-3/8"

479mm x 340mm x 340mm Weight 33 lb/15kg

Occasional refinements may be made to ex isting products without notice but will always meet or exceed original specifications unless otherwis e stated.

SUB-TS7/TS8 harman/kardon

SUB-TS7 100W Powered Sub/ Plate Amp SUB-TS8 100W Powered Sub/ Plate Amp

LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes

US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation

Parameter Amp Section

Type (Class AB, D, other) AB n/a Load Impedance (speaker) 4 Ohms Rated Output Power 100 Watts THD @ Rated Power 0.08 % THD @ 1 Watt 0.15 % DC Offset 5 mV-DC

Damping factor >100 n/a

Input Sensitivity

Input Frequency 50 Hz Line (L&R) Input 220 mVrms SUB (LFE) Input 125 mVrms Speaker/Hi Level Input 2.2 Vrms

Hi Level Max. Input Voltage 32 Vrms

Signal to Noise

SNR-A-Weighted 100 dB SNR-unweighted 90 dB SNR rel. 1W-unweighted 65 dB

Residual Noise Floor 1.2 mVrms

Residual Noise Floor 0.8 mVrms

Input Impedance

Line Input (L, R,LFE) 10K ohms Speaker/Hi Level Input 4.7K ohms

Nonimal

Specification

Unit

QA Test

Limits

n/a n/a 75

0.1

0.5 30

n/a

154 - 308

87 - 175

1.5 - 3.0

85 80 60

3.0

2.0

n/a n/a

Conditions Notes

Nominal 50 - 250 Hz, 1 input driven, limiter off 22k filter 22k filter @ Speaker Outputs

Measured at amplifier board

Nominal Freq. To Rated Power Single input driven To Rated Power SUB (LFE) input driven only To Rated Power (20 dB below Line In), Single input driven

Nominal Freq., Min. Volume

relative to rated power A-Weighting filter relative to rated power 22k filter relative to 1W Output 22k filter Volume @max, using RMS reading DMM/VOM (or A/P)

Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)

Nominal Nominal

Measured at the speaker at speaker output terminals on the amp board.

Filters

L&R Fixed Low-Pass Filter 170 Hz SUB (LFE) Low pass Filter 270 Hz Subsonic filter (HPF) 3rd Order 28 Hz

Limiter

THD at Max. Output Power

Features

Auto - On -Off Selection Switch YES Phase Switch 0-180 deg Filter On/Off Switch YES Volume Pot Taper (Lin/Log) LOG Speaker Out YES 2-Color LED power indicator YES Power Switch YES Fuse Holder YES

Input Configuration

Line In (L,R) SUB (LFE) YES Speaker/Hi Level In YES

Signal Sensing (ATO)

Auto-Turn-On (yes/no) YES ATO Input test frequency 50 Hz ATO Level Line & SUB Input 4.0 mV ATO Level Speaker in 40 mV

ATO Turn-on time 5 ms

ATO Turn-OFF Time 15 minutes

2.0 %

YES

150 - 200 240 - 300

22 - 28

functional functional functional functional functional functional Blue: On, Amber: Stand-by functional functional

functional Dual RCA jack functional RCA jack

functional

2.0 - 6.0 25 - 55

functional

10 - 20

@ -6dB ref. 100Hz @ -3dB ref. 100Hz @ -3dB ref. 30Hz

5.0

Auto - on selection switch in Auto

n/a

Auto - on selection switch in Auto Auto - on selection switch in Auto Auto - on selection switch in Auto Amp connected and AC on, then input signal applied Time before muting, after signal is removed

2nd order fixed 2nd order fixed 3rd order fixed

Refer to ATO section

A Taper Binding post connector L&R

Binding post connector L&R

Power on Delay time 3 sec.

Transients/Pops

ATO Transient 5 mV-peak Turn-on Transient 50 mV-peak

functional

100

AC Power Applied

@ Speaker Outputs @ Speaker Outputs AC Line cycled from OFF to ON

SUB-TS7/TS8 harman/kardon

Parameter

Turn-off Transient 50 mV-peak

Efficiency

Stand-by Input Power 10 Watts Power Consumption @ rated pow

Protection

Short Circuit Protection YES

Thermal Protection YES DC Offset Protection YES Primary Fuse Rating

USA-Domestic (120V) 2.5 Amps

Nonimal

Specification

Unit

170 Watts

QA Test

Limits

100

200

functional

functional functional

n/a

Conditions Notes

@ Speaker Outputs AC Line cycled from ON to OFF

Maximum allowable input power under nominal

input voltage and frequency, in stand-by mode (HO @ nom. line voltage @ nom. line voltage 100 Watts @ 4.0 ohms and nominal line voltage

Direct short at output

DC present at Speaker Out leads Relay or crowbar (for driver/fire protection),

Type-T or Slo Blo User-replacable fuse with UL/SEMCO rated holder.

or COLD operation).

Amplifier should resume operation after short circuit

condition is removed.

Any user accessible metal parts should always

remain at 65 degree C or less for domestic version

or 55 degree C or less for EU version.

SUB-TS7/TS8 harman/kardon

SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS

SUBWOOFER

LEVEL

FILTER

LINE

LEVEL

AUTO

OFF

SUB

REVERSE

NORMAL

PHASE

MAXMIN

CAUTION

RISK OF ELECTR IC SHO C K

RISK OF ELEC TR IC SH O CK

RISK OF ELEC TR IC SH O CK DO NOT OPEN

DO NOT OPEN

™

¢ ∞

I G H

L E V E L

• ª

IMPORTANT: CONNECT STRIPED WIRE

‚

¡ Subwoofer-Level Control ™ High-Cut (Low-Pass) Filter Switch £ Music-Sense On/Off Switch ¢ Phase Switch

TO RED ( ) SPEAKER TERMINAL.

INOUT

¡ Subwoofer-Level Control: Volume may be adjusted using the Subwoofer- Level Control. Turn the control clockwise to increase the Subwfr volume, or counterclockwise to decrease it.

™ High-Cut (Low-Pass) Filter Switch:

Placing switch in the ON position activates circuitry that cuts out all audio input signals

above 120Hz. This allows the Subwfr

to focus its power on reproducing the lowfrequency portion of the signal, avoiding

WARNING: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE T 2.5A L/250 VOLT FUSE

AVERTISSEMENT: UTILISEZ UN FUSIBLE DE RECHANGE DE MEME TYPE T 2.5A L/250V

∞ Line-Level Subwoofer (SUB) Input

§ Line-Level Full-Range Inputs ¶ Speaker-Level Outputs

• Speaker-Level Inputs

inefficiency and distortion. Engage this filter when using the Speaker-Level Inputs •, or when using the Line-Level Full-Range Inputs §, unless your receiver or processor processes its line-level output using a lowpass filter. The filter has no effect when the

SUB Input ∞ is used.

£ Music-Sense On/Off Switch: When

placed in the AUTO position, and when the Master Power Switch ª is turned on, the

Subwfr will automatically turn itself on or

POWER

AC 120V~60Hz

ª Master Power Switch ‚ AC Power Cord

place itself in the Standby mode, depending on whether it is receiving an audio signal. When this switch is placed in the ON position, the

Subwfr will remain on, whether or not it is

receiving an audio signal.

An LED located on top of the Subwfr indicates whether the Subwfr is in the ON or

STANDBY state when used with the Music- Sense On/Off Switch £ in the AUTO position. The LED is lit blue to indicate that

the Subwfr is receiving an audio signal

SUB-TS8 SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS 5

SUB-TS7/TS8 harman/kardon

SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS

and is turned on, and the LED is lit amber to indicate that no signal is being received and

the Subwfr is in Standby mode.

When the Music-Sense On/Off Switch £ is in the ON position, the LED will be lit blue, whether or not an audio signal is present.

When the Master Power Switch ª is turned off, the LED goes dark, no matter which position the Music-Sense On/Off

Switch £ is in.

¢ Phase Switch: This switch determines

whether the subwoofer’s pistonlike action moves in and out in phase with the main speakers. If the speakers were to play out of phase, the sound waves produced by the subwoofer would be cancelled out, reducing bass response. This phenomenon depends in part on the relative placement of the speakers in the room. In most cases, the Phase Switch ¢ should be left in the NORMAL position. However, it does no harm to experiment with the Phase Switch ¢, and you may leave it in the position that maximizes bass response.

∞ Line-Level Subwoofer (SUB) Input:

Connect the subwoofer output of a receiver with digital surround sound decoding, such as Dolby* Digital or DTS

input bypasses the Subwfr’s internal

crossover circuitry, and should only be used with a filtered signal. If your receiver does not have digital decoding, you should use the

Line-Level Full-Range Inputs § instead.

, to this input. This

§ Line-Level Full-Range Inputs: Connect the line-level subwoofer output or preamp output(s) of your receiver or amplifier to these inputs. If your receiver does not have a separate subwoofer output, use a Y-adapter (not supplied) to bridge the receiver’s preamp output to the main amp input for that channel, and connect the long end of the adapter to the corresponding line-level input on the Subwfr. If your receiver has only a single subwoofer output, you may connect it to either the left or right line-level input on the Subwfr, and no Y-adapter is needed.

¶ Speaker-Level Outputs: If you are using the Speaker-Level Inputs • on the Subwfr, you should connect these bindingpost terminals to the front left and right speakers, remembering to maintain polarity by connecting the (+) terminal on the subwoofer to the (+) terminal on the speaker, and the (–) terminal on the subwoofer to the (–) terminal on the speaker. If you are not using the Speaker-Level Inputs •, then connect your front to your receiver 8 for further information on speaker connections.

• Speaker-Level Inputs: Connect these binding-post terminals to the main left and right speaker terminals of your receiver or amplifier, if your receiver or amplifier does not have a line-level subwoofer output. Remember to maintain polarity by connecting the (+) terminal on the receiver/amplifier to the (+) terminal on the subwoofer, and the (–) terminal on the receiver/amplifier to the (–) terminal on the subwoofer.

left and right speakers directly

or amplifier. See pages

ª Master Power Switch: Place this switch in the “•” position to power-on the subwoofer. The Subwfr will then be either in the Standby mode or completely on, depending on the position of the Music-

Sense On/Off Switch £.

‚ AC Power Cord: Make sure to plug this

cord into an active, unswitched electrical out-

let for proper operation of the Subwfr.

The cord should not be plugged into the accessory outlets found on some audio components.

10 SPEAKER CONNECTIONS

Dolby* Digital or DTS®(or Other Digital Surround Mode) Connection

USE THIS INSTALLATION METHOD FOR DOLBY DIGITAL, DTS OR OTHER DIGITAL SURROUND PROCESSORS:

Use the line-level input jack marked SUB ∞ for the Low-Frequency Effects channel. Connect this jack to the subwoofer output or LFE output on your receiver or amplifier. Connect each speaker to the corresponding speaker terminals on your receiver or amplifier.

Make sure you’ve configured your surround sound processor for “Subwoofer On.” The front left, front right, center and surround speakers should all be set to “Small.”

When all connections have been made, plug the AC power cord on the subwoofer into an AC outlet.

SPEAKER CONNECTIONS

SUB-TS7/TS8 harman/kardon

Front

Left

Surround

Left

Front

Left

Surround

Left

Center

Subwoofer

LINE LEVEL IN

SUB

SUB/LFE

Out

Center

Surround Back

Front Right

Surround

Right

Surround

Right

Receiver

Surround

Back

SUB-TS7/TS8 harman/kardon

SPEAKER CONNECTIONS

Dolby Pro Logic* (Non-Digital) – Line Level

USE THIS INSTALLATION METHOD FOR DOLBY PRO LOGIC APPLICATIONS (NOT DOLBY DIGITAL, DTS OR OTHER DIGITAL PROCESSING), WHERE THE RECEIVER/ PROCESSOR IS EQUIPPED WITH A SUBWOOFER OUTPUT, OR A VOLUMECONTROLLED PREAMP (LINE-) LEVEL OUTPUT:

Use the supplied RCA-type interconnect cable to connect the output on your receiver the left or right Line-Level Full-Range Input § on the subwoofer. Use both the left and right inputs on the subwoofer if your receiver or processor has both left and right line-level outputs. In that case, you will need to supply a second interconnect cable.

If your receiver is equipped with line-level outputs but does not have a separate subwoofer output, use a Y-adapter (not supplied) to bridge the receiver’s preamp output to the main amp input for that channel, and connect the long end of the adapter to the corre-

sponding line-level input on the Subwfr.

IMPORTANT: Do not use the SUB Input ∞ on the subwoofer with Dolby Pro Logic processors.

If your receiver/processor has a built-in lowpass-crossover filter for the subwoofer output, you may use the SUB Input ∞ to bypass the subwoofer’s internal crossover.

Connect each speaker to the corresponding speaker terminals on your receiver or amplifier.

Make sure that you have configured your surround sound processor for “Subwoofer On.” The front left, front right, center and surround speakers should all be set to “Small.”

When all connections have been made, plug the AC power cord on the subwoofer into an AC outlet.

line-level subwoofer

or amplifier to either

Front

Left

Surround

Left

Front

Left

Surround

Left

Center

Subwoofer

Line-Level

SUB/LFE

Out

Center

Surround Back

Receiver

Surround

Back

Front Right

Surround

Right

Surround

Right

SPEAKER CONNECTIONS 11

Front Left

Surround Left

Center

Front Right

Surround Right

SUB-TS8

Subwoofer

Surround

Right

Front Right

Surround

Left

Front

Left

Center

I G H

L E V E L

Receiver

Surround Back

Surround

Back

SUB-TS7/TS8 harman/kardon

SPEAKER CONNECTIONS

Dolby Pro Logic (Non-Digital) – Speaker Level

USE THIS INSTALLATION METHOD FOR DOLBY PRO LOGIC APPLICATIONS (NOT DOLBY DIGITAL, DTS OR PROCESSING), WHERE THE RECEIVER/ PROCESSOR DOES NOT HAVE A SUBWOOFER OUTPUT, OR A VOLUMECONTROLLED PREAMP (LINE-) LEVEL OUTPUT:

Connect your receiver or amplifier’s front left and right speaker terminals to the left and right Speaker-Level Input • termi-

nals on the Subwfr subwoofer that are

marked “High Level In.” Connect the left and right Speaker-Level Output ¶ terminals

on the Subwfr subwoofer that are marked

“High Level Out” to the corresponding terminals on

the back of your front left and right

speakers.

Connect your receiver or amplifier’s center and surround speaker terminals to the corresponding terminals on the back of your center and surround speakers.

When all connections have been made, plug the AC power cord on the subwoofer into an AC outlet.

OTHER DIGITAL

12 SPEAKER CONNECTIONS

SUB-TS7/TS8 harman/kardon

OPERATION

Move the Master Power Switch ª (marked Power) to the “•” (On) position. The Subwfr subwoofer will automatically turn itself on or go into Standby mode, depending on whether or not a signal is being sent to it by your receiver or surround processor, and provided that the Music- Sense On/Off Switch £ is moved down so that it is in the AUTO position.

When your receiver or amplifier is off, or is not sending program material to the subwoofer, the subwoofer will be in Standby mode and the LED Indicator on the top of the subwoofer will turn amber. When the sub

woofer senses an audio signal,

it will automatically turn itself on and the LED Indicator will turn blue. If the subwoofer does not sense a signal after minutes,

it will automatically go into Standby

approximately twenty

mode.

When the Music-Sense On/Off Switch £ is switched to the ON position, the subwoofer will remain on, whether or not program material is playing, and the LED Indicator will remain lit blue.

If you’ll be away from home for an extended period of time, or if the subwoofer will not be used, switch the Master Power Switch ª to the OFF position.

Volume

Volume can be adjusted using the Subwoofer-Level Control ¡, as shown. Turn the control knob clockwise to increase the volume of the subwoofer, and counterclockwise to decrease the subwoofer’s volume.

Subwoofer

Level

MIN MAX

Subwoofer

Level

MIN MAX

Additional Bass Adjustments

In addition to the volume adjustments

described above, the Subwfr subwoofer includes a Phase Switch ¢ and a Filter Switch ™ that can be used to adjust the

bass response to suit your listening environment or taste.

In most situations, the Phase Switch ¢ should be left in the NORMAL position. If you suspect that the subwoofer is playing out of phase with the other speakers, which would tend to diminish bass response, try placing this switch in the REVERSE position. There is no harm in experimenting, and you may return the switch to the NORMAL position at any time. If you rearrange your room and reposition the speakers, it would be a good idea to check whether they are in phase by flipping this switch.

The High-Cut (Low-Pass) Filter Switch ™ limits the frequencies of the audio signal inputted to the subwoofer to the low frequencies that the subwoofer reproduces best. This allows the subwoofer to perform more efficiently, and with superior bass reproduction, minimizing distortion that might occur if the subwoofer attempted to reproduce higher frequencies. This switch should be left in the ON position, except:

1. When the SUB Input ∞ is being used, in which case it has no effect, or

2. When the Speaker-Level Inputs • or the Line-Level Full-Range Inputs § are being used with a crossover or filter aboard the receiver or processor.

In these two circumstances, place the switch in the OFF position.

OPERATION 13

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