Onkyo SKS-HT320S, HTP-320 Service Manual

SERVICE MANUAL

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SERVICE MANUAL

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5.1-CH HOME THEATER SPEAKER PACKAGE

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MODEL SKS-HT320(S)

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SKS-HT320

Ref. No. 3846

092004

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Front Speakers (L / R)

"SKF-320F"

13942296513

Center Speaker

"SKC-320C"

Silver model

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SAFETY-RELATED COMPONENT
WARNING!!

COMPONENTS IDENTIFIED BY MARK ON THE

SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE

CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.

REPLACE THESE COMPONENTS WITH ONKYO

PARTS WHOSE PART NUMBERS APPEAR AS SHOWN

IN THIS MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE

MEASUREMENTS TO DETERMINE THAT EXPOSED

PARTS ARE ACCEPTABLY INSULATED FROM THE

SUPPLY CIRCUIT BEFORE RETURNING THE

APPLIANCE TO THE CUSTOMER.

Surround Speakers (L / R)

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120 V AC, 60HzSMDD

"SKM-320S"

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6

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1

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1

Powered Subwoofer

"SKW-320X"

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SPECIFICATIONS

SKS-HT320

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Powered Subwoofer (SKW-320X) Center Speaker (SKC-320C)

Type :
Input sensitivity / impedance :
Maximum output power :
Frequency response :
Cabinet capacity :
Dimensions (W x H x D) :

Weight :
Speaker unit :
Power supply :
Power consumption :
Other :

6

3

1

5

1

Powered Bass-reflex

220 mV / 15 k ohm

100 W (Dynamic Power)

35 Hz - 150 Hz

0.91 cubic feet (26 Litter)

9-1/16 x 17-13/16 x 15-7/8

inch

(230 x 436 x 404 mm)

24.7 lbs. (11.2 kg)

8 inch Cone

AC 120 V, 60 Hz

75 W

Auto-Standby function

5

0

Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :

Weight :
Speaker unit :
Woofer
Tweeter
Terminal :
Other :

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2 Way Bass-reflex

8 ohm

100 W

78 dB/W/m

70 Hz - 50 kHz

4.5 kHz

0.057 cubic feet (1.6 Litter)

10-3/8 x 4 x 4-15/16 inch

(264 x 101 x 126 mm)

4.4 lbs. (2.0 kg)

3-1/8 inch Cone x 2

1 inch Balanced Dome

Spring type Color coded

Magnetic shielding

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13942296513

Front Speaker (SKF-320F)

Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :

Weight :
Speaker unit :
Woofer :
Tweeter :
Terminal :
Other :

2 Way Bass-reflex

8 ohm

100 W

76 dB/W/m

70 Hz - 50 kHz

4.5 kHz

0.035 cubic feet (1.0 Litter)

4 x 6-5/8 x 4-15/16 inch

(101 x 169 x 126 mm)

2.6 lbs. (1.2 kg)

3-1/8 inch Cone

1 inch Balanced Dome

Spring type Color coded

Magnetic shielding

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Surround Speaker (SKM-320S)

Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :

Weight :
Speaker unit :
Woofer :
Tweeter :
Terminal :

Specifications and appearance are subject to change

without prior notice.

2 Way Bass-reflex

8 ohm

100 W

79 dB/W/m

70 Hz - 30 kHz

10 kHz

0.035 cubic feet (1.0 Litter)

4 x 6-5/8 x 4-15/16 inch

(101 x 169 x 126 mm)

1.8 lbs. (0.8 kg)

3-1/8 inch Cone Woofer

3/4 inch Ceramic Tweeter

Spring type Color coded

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SKS-HT320

EXPLODED VIEWS-1

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SKW-320X : POWERED SUBWOOFER

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A02

7

U01

13942296513

A03

6

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SP06

x 10 pcs.

U03

U02

1

F903

F902

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A01

0

A05 x 4 pcs.

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Refer to "EXPLODED VIEWS-2"

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<Note>

IC501---> Refer to "PRINTED CIRCUIT BOARD PARTS LIST"

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EXPLODED VIEWS-2

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SKW-320X : POWERED SUBWOOFER

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13942296513

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SP01

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SP02

x 4 pcs.

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SP08

SP06

x 8 pcs.

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SP03

SKS-HT320

SP05

x 8 pcs.

SKS-HT320

EXPLODED VIEWS-3

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SKF-320F / SKC-320C / SKM-320S

TERMINAL :
White / Black

TEL

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SP11

13942296513

"SKF-320F (L)" "SKF-320F (R)"

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SP10 SP12

3

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TERMINAL :
Red / Black

1

SP13

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0

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TERMINAL :
Green / Black

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SP15

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SP14

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"SKC-320C"

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SP16 SP18

SP17 SP19

TERMINAL :
Blue / Black

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NOT MAGNETICALLY SHIELDED NOT MAGNETICALLY SHIELDED

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TERMINAL :
Gray / Black

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SKS-HT320

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"SKM-320S (R)""SKM-320S (L)"

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HTP-320

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BLOCK DIAGRAM

SKW-320 : POWERED SUBWOOFER

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SCHEMATIC DIAGRAM

SKW-320: POWERED SUBWOOFER

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HT-320FGH

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13942296513

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LINE

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INPUT

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OUTPUT
LEVEL

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INPUT PC BOARD

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VR / LED PC BOARD

U03

HTP-320

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SPEAKER

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MAIN PC BOARD

13942296513

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HTP-320

A

SCHEMATIC DIAGRAM

SKW-320: POWERED SUBWOOFER

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BCDEFGH

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SPEAKER

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E

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LINE
INPUT

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INPUT PC BOARD

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OUTPUT
LEVEL

LED
RED : STANDBY
GREEN : ON

VR / LED PC BOARD

U03

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U01

AC 120V / 60Hz

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MAIN PC BOARD

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HTP320

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PC BOARD CONNECTION DIAGRAM

SKW-320 : POWERED SUBWOOFER

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INPUT PC BOARD

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13942296513

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MAIN PC BOARD

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VR / LED PC BOARD

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HTP-320

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PRINTED CIRCUIT BOARD VIEW

SKW-320POWERED SUBWOOFER

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MAIN PC BOARD

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BCD

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13942296513

INPUT PC BOARD

U02

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VR / LED PC BOARD

U03

No PC board view
Look over the actual PC board on hand

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120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

VERY HIG H OPERATI NG VOLTAGE R ANGE
(±50V)

DMOS POWER STAGE
HIGH OUTPUT POWER (100W @ THD =

TEL [phone] QQ 376315150 892498299

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10%, R
MUTING/STAND- BY FUNC TION S
NO SWITCH ON/OFF NOISE
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTED (WITH NO IN-

PUT SIGNAL APPLIED)
THERMAL SHUTDOWN
CLIP DETECTOR
MODULARITY (MORE DEVICES CAN BE

EASILY CONNECTED IN PARALLEL TO
DRIVE VERY LOW IMPEDANCES)

DESCRIPTION

The TDA7293 is a monolithic integrated circuit in
Multiwatt15 package, intended for use as audio
class AB amplifier in Hi-Fi field applications
(Home Stereo, self powered loudspeakers, Top-

L

= 8Ω, VS = ±40V)

13942296513

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MULTIPOWER BCD TECHNOLOGY

Multiwatt15V Multiwatt15H

TDA7293V TDA7293HS

class TV). Thanks to the wide voltage range and
to the high out current c apability it is able to sup­ply the highest power into both 4Ω and 8Ω loads.

The built in muting function with turn on delay
simplifies the remote operation avoiding switching
on-off noises.
Parallel mode is made possible by connecting
more device through of pin11. High out put power

7

3

can be delivered to very low impedance loads, so
optimizing the thermal dissipation of the system.

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ORDERING NUMBERS:

5

1

5

1

3

6

4

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TDA7293

2

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Figure 1: Typical Application and Test Circuit

R3 22K

C2

R2

22µF

VMUTE

VSTBY

January 2003

680Ω

C1 470nF

R1 22K

R5 10K

R4 22K

C3 10µF C4 10µF

IN- 2

IN+

3

4

SGND
(**)

10

MUTE

9

STBY

(*) see Application note
(**) for SLAVE function

MUTE

STBY

1
STBY-GND

C7 100nF C6 1000µF

BUFFER DRIVER

11

713

-

+

THERMAL

SHUTDOWN

-Vs -PWVs

C9 100nF C8 1000µF

+Vs

PROTECTION

158

-Vs

+PWVs+Vs

S/C

14

12

6
5

D97AU805A

OUT

BOOT
LOADER

C5

22µF

BOOTSTRAP

CLIP DET

(*)

VCLIP

1/15

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TDA7293

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PIN CONNECTION (Top view)

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0

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15
14
13
12
11
10

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8
7
6

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TAB CONNECTED TO PIN 8

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Supply Voltage (No Signal)

S

V

1

13942296513

2

3
4

5
6
9

, TjStorage and Junction Temperature 150

STAND-BY

Input Voltage (inverting) Referred to -VS 90 V
Maximum Differential Inputs

3

Input Voltage (non inverting) Referred to -VS 90 V
Signal GND Voltage Referred to -VS 90 V
Clip Detector Voltage Referred to -VS 120 V
Bootstrap Voltage Referred to -VS 120 V
Stand-by Voltage Referred to -VS 120 V
Mute Voltage Referred to -VS 120 V
Buffer Voltage Referred to -VS 120 V
Bootstrap Loader Voltage Referred to -VS 100 V
Output Peak Current 10 A
Power Dissipation T
Operating Ambient Temperature Range 0 to 70

GND Voltage Referred to -VS (pin 8) 90 V

= 70°C50W

case

TEL

V
V
V

- V

V

2

V
V
V
V
V

V

10

V

11

V

12

I

O

P

tot

T

op

T

stg

5
4
3
2
1

D97AU806

Q

Q

-VS (POWER)
OUT
+V
BOOTSTRAP LOADER
BUFFER DRIVER
MUTE
STAND-BY

-V
+V
BOOTSTRAP
CLIP AND SHORT CIRCUIT DETECTOR
SIGNAL GROUND
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND

7

3

(POWER)

S

(SIGNAL)

S

(SIGNAL)

S

3

6

1

5

1

60 V

±

8

0

5

30 V

±

9

2

4

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8

°
°

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C
C

THERMAL DATA

Symbol Description

Thermal Resistance Junction-case 1 1.5

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Typ

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Max Unit

C/W

°

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ELECTRICAL CHARACTERISTICS (Refer to the Test Circuit V
T

= 25°C, f = 1 kHz; unless otherwise specified).

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

I

q

I

b

V

OS

I

OS

P

O

d Total Harmonic Distortion (**) PO = 5W; f = 1kHz

I

SC

SR Slew Rate 5 10 V/µs

G

V

G

V

e

N

R

i

SVR Supply Voltage Rejection f = 100Hz; V

T

S

STAND-BY FUNCTION

V

ST on

13942296513

V

ST off

ATT

st-by

I

q st-by

MUTE FUNCTION

V

Mon

V

Moff

ATT

mute

CLIP DETECTOR

Duty Duty Cycle ( pin 5) THD = 1% ; RL = 10KΩ to 5V 10 %

I

CLEAK

SLAVE FUNCTION pin 4

V

Slave

V

Master

Note (1):
Note:

Note (**):

Vmin

G

Pin 11 only for modular connection. Max external load 1MΩ/10 pF, only for test purpose

Tested with optimized Application Board (see fig. 2)

6

Supply Range
Quiescent Current 50 100 mA
Input Bias Current 0.3 1
Input Offset Voltage -10 10 mV
Input Offset Current 0.2
RMS Continuous Output Power d = 1%:

Current Limiter Threshold VS ≤ ± 40V 6.5 A

Open Loop Voltage Gain 80 dB
Closed Loop Voltage Gain (1) 29 30 31 dB
Total Input Noise A = curve

Input Resistance 100 k

Thermal Protection DEVICE MUTED 150

Stand-by on Threshold 1.5 V
Stand-by off Threshold 3.5 V
Stand-by Attenuation 70 90 dB
Quiescent Current @ Stand-by 0.5 1 mA

(Ref: to pin 1)
Mute on Threshold 1.5 V
Mute off Threshold 3.5 V
Mute AttenuatIon 60 80 dB

SlaveThreshold 1V
Master Threshold 3 V

26dB

≥

1

3

(Ref: to pin 1)

(Ref: to pin 8 -V

5

1

5

0

R

= 4

VS = ± 29V,

Ω;

L

d = 10%

= 4Ω ; VS = ±29V

R

L

P

= 0.1 to 50W; f = 20Hz to 15kHz

O

f = 20Hz to 20kHz

= 0.5Vrms 75 dB

ripple

DEVICE SHUT DOWN 160

7

3

Q

Q

THD = 10% ;
RL = 10KΩ to 5V

PO = 50W 3

)

S

4

2

9

8

= ±40V, RL = 8Ω, Rg = 50 Ω;

S

12

±

75 80

90 100

0

5

1

5

1

3

6

30 40 50 %

9

80

100

0.005

1
310

9

8

TDA7293

8

50 V

±

0.1

4

2

2

9

9

A

µ

A

µ

W

W

%
%

V

µ

V

µ

Ω

C

°

C

°

2

8

A

µ

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TDA7293

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Figure 2: Typical Application P.C. Board and Component Layout (scale 1:1)

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13942296513

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TDA7293

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APPLICATION SUGGES TION S (see Test and Application Circuits of the Fig. 1)
The recommended values of t he external components are t hose shown on t he application circuit o f Fig-

ure 1. Different values can be used; the following table can help the designer.

6

3

1

5

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0

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COMPONENTS SUGGESTED VALUE PURPOSE

R1 (*) 22k INPUT RESISTANCE INCREASE INPUT

R2 680

R3 (*) 22k INCREASE OF GAIN DECREASE OF GAIN

TEL [phone] QQ 376315150 892498299

TEL

R4 22k ST-BY TIME

R5 10k MUTE TIME

C1 0.47µF INPUT DC

C2 22µF FEEDBACK DC

C3 10µF MUTE TIME

C4 10µF ST-BY TIME

13942296513

Ω

CLOSED LOOP GAIN

SET TO 30dB (**)

CONSTANT

CONSTANT

DECOUPLING

DECOUPLING

CONSTANT

Q

3

CONSTANT

Q

7

LARGER THAN

SUGGESTED

IMPEDANCE

DECREASE OF GAIN INCREASE OF GAIN

LARGER ST-BY

ON/OFF TIME

LARGER MUTE

ON/OFF TIME

LARGER MUTE

ON/OFF TIME

LARGER ST-BY

5

1

3

6

ON/OFF TIME

1

5

0

SMALLER THAN

SUGGESTED

DECREASE INPUT

IMPEDANCE

SMALLER ST-BY

ON/OFF TIME;

POP NOISE

SMALLER MUTE

ON/OFF TIME
HIGHER LOW

FREQUENCY

CUTOFF

HIGHER LOW
FREQUENCY

CUTOFF

SMALLER MUTE

ON/OFF TIME

SMALLER ST-BY

2

9

8

ON/OFF TIME;

POP NOISE

4

9

8

2

9

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C5 22µFXN (***) BOOTSTRAPPING SIGNAL

C6, C8 1000µF SUPPLY VOLTAGE

C7, C9 0.1µF SUPPLY VOLTAGE

(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be ≥ 26dB
(***) Multiplay this value for the number of modular part connected

D98AU821

S

)

Slave function: pin 4 (Ref to pin 8 -V

+3V

-V

S

-V

+1V

S

-V

S

MASTER

UNDEFINED

SLAVE

DEGRADATION AT
LOW FREQUENCY

BYPASS

BYPASS

Note:

If in the application, the speakers are connected
via long wires, it is a good rule to add between
the output and GND, a Boucherot Cell, in order to
avoid dangerous spurious oscillations when the
speakers terminal are shorted.

The suggested Boucherot Resistor is 3.9Ω/2W
and the capacitor is 1µF.

DANGER OF

OSCILLATION

w

w

w

.

xia

o

y

u

1

6

3

.

c

o

5/15

m