Harman Kardon HKTS-7 Service manual

harman/kardon

SUB-TS7

(HKTS 7 SUBWOOFER)

SERVICE MANUAL

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797 Rev1 6/2004

SUB-TS7

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

BLOCK DIAGRAM . . . . . . . . . . . . . .. . . . . . . ……………… . . . . . . .. . . . . . . 14

PCB DRAWIN GS. . . . . . . . . . . . . . . . .. . . . . ……… . …………. . . . . .. .. . . . . . 15

ELECTRICAL PARTS LIST …………. .... . .. . . . . ………….…….. . . .. .. . . . . 19

SEMICONDUCTOR PINOUTS . . . .. .. .. .. . . . .. . ……………………..………. .23

SCHEMATIC D IAG RAM S . . . . . . . . .. .. .. .. . . . .. . ……………………………. .24

PACKAGING. .. . . . . . . . . . . . . . .. . . . ........................................ .... ... .............. 26

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.

1

2

SUB-TS7

harman/kardon

SUB-TS7 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

30

n/a

154 - 308

87 - 175

1.5 - 3.0

30

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)
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
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

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

10

100

AC Power Applied

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

T

e

3

SUB-TS7

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

12

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 SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS 5

SUB-TS7 SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS

4

SUB-TS7

harman/kardon

SUBWOOFER

¡

™

£

¢
∞

§

¶

LEVEL

FILTER

ON

OFF

ON

AUTO

SUB

LINE

LEVEL

IN

L

H

I
G
H

L
E
V
E
L

R

MIN

REVERSE

NORMAL

R

MAX

PHASE

L

SUB-TS7

RISK OF ELECTRIC SH O C K

RISK OF ELECTRIC SH O C K

RISK OF ELECTRIC SH O C K
DO NOT OPEN

DO NOT OPEN

DO NOT OPEN

"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"

For use with
HKTS 7 System

CAUTION

CAUTION

POWER

AC 120V~60Hz

•
ª

‚

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

IMPORTANT: CONNECT STRIPED WIRE
TO RED ( ) SPEAKER TERMINAL.

¡ Subwoofer-Level Control:Volume
may be adjusted using the Subwoofer-
Level Control.Turn the control clockwise
to increase the SUB-TS7’s volume,or
counterclockwise to decrease it.

™ High-Cut (Lo w-Pass) Filter Switch:

Placing this switch in the ON position acti­vates circuitry that cuts out all audio input
signals above 120Hz.This allows the SUB­TS7 to focus its power on reproducing the
low-frequency portion of the signal, avoiding

INOUT

∞ Line-Level Subwoofer (SUB) Input

§ Line-Level Full-Range Inputs

ª Master Power Switch
‚ AC Power Cord

¶ 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
SUB-TS7 will automatically turn itself on or

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
SUB-TS7 will remain on,whether or not it is
receiving an audio signal.

An LED located on top of the SUB-TS7 indi­cates whether the SUB-TS7 is in the ON or
STANDBYstate when used with the Music-
Sense On/Off Switch £ in the AUTO
position.The LED is lit blue to indicate that
the SUB-TS7 is receiving an audio signal

6 SUB-TS7 SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS

SUB-TS7 SUBWOOFER AMPLIFIER PANEL CONTROLS AND CONNECTIONS

5

SUB-TS7

harman/kardon

and is turned on, and the LED is lit amber to
indicate that no signal is being received and
the SUB-TS7 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 SUB-TS7 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 SUB-TS7’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
SUB-TS7. If your receiver has only a single
subwoofer output, you may connect it to
either the left or right line-level input on the
SUB-TS7, and no Y-adapter is needed.

¶ Speaker-Level Outputs: If you are
using the Speaker-Level Inputs • on the
SUB-TS7, you should connect these binding­post ter minals to your front left and right
speakers,remembering to maintain polarity
by connecting the (+) terminal on the SUB­TS7 subwoofer to the (+) terminal on the
speaker, and the (–) terminal on the SUB­TS7 subwoofer to the (–) terminal on the
speaker. If you are not using the Speaker-
Level Inputs •, then connect your front
left and right speakers directly to your receiver
or amplifier. See pages 9 through 12 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 SUB-TS7 subwoofer, and
the (–) terminal on the receiver/amplifier to the
(–) terminal on the SUB-TS7 subwoofer.

ª Master Power Switch: Place this
switch in the “•”position to power-on the
SUB-TS7 subwoofer. The SUB-TS7 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 out­let for proper operation of the SUB-TS7.
The cord should not be plugged into the
accessory outlets found on some audio
components.

6

SUB-TS7

SPEAKER CONNECTIONS

harman/kardon

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.

Front

Left

– +

Surround

Left

– +

Front

Left

Surround

Left

Center

– +

SUB-TS7 Subwoofer

LINE LEVEL IN

SUB

SUB/LFE

Out

Center

Receiver

L

R

Surround

Front
Right

– +

Front
Right

Right

Surround

Right

– +

10 SPEAKER CONNECTIONS

SPEAKER CONNECTIONS 11

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

line-level subwoofer

output on your receiver

or amplifier to either
the left or right Line-Level Full-Range
Input § on the SUB-TS7 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 corre­sponding line-level input on the SUB-TS7.

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.

SPEAKER CONNECTIONS

7

SUB-TS7

harman/kardon

Front

Left

– +

Surround

Left

– +

Front

Left

Surround

Left

Center

– +

SUB-TS7

Subwoofer
Line-Level

R

L

SUB/LFE

Out

Center

Receiver

Front
Right

– +

Front
Right

Surround

Right

Surround

Right

– +

12 SPEAKER CONNECTIONS

SPEAKER CONNECTIONS

Front Left

Surround Left

Center

Front Right

Surround Right

Receiver

– + – +

– +

– + – +

SUB-TS7

Subwoofer

Surround

Right

Front
Right

Surround

Left

Front

Left

Center

L

R

H

I

G
H

L
E
V
E
L

8

SUB-TS7

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 • termi­nals on the SUB-TS7 subwoofer that are
marked “High Level In.” Connect the left and
right Speaker-Level Output ¶ terminals
on the SUB-TS7 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 left and right speaker termi­nals to the corresponding terminals on the
back of your center, and surround left and
right speakers.

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

OTHER DIGITAL

harman/kardon