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Service Guide

GHT-V150

SERVICE GUIDE

GHT-V150 Version:1.0

Version 1.0

Page 1 of 21


Service Guide

GHT-V150

Revision History

Version

Date

1.0

10/11/2005

Version 1.0

Change

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Service Guide

GHT-V150

Table of Contents Revision History Table of Contents Getting Started Conventions Used in this Guide Safety Precautions

2 3 4 4 4

Chapter 1. How to Handle Defective Returns 1.1 Overview 1.2 Problems 1.2.1 FL/FR, RL/RR channels no sound 1.2.2 CEN channel no sound 1.2.3 Woofer channel no sound 1.2.4 Woofer no power

5 5 6 7 8 8 9

Chapter 2. Specifications Chapter 3. Block Diagram Chapter 4. Exploded View Chapter 5. Part List Chapter 6. Schematic Diagram Schematic Diagram Schematic Diagram Schematic Diagram Schematic Diagram

10 12 13 15 16 17 18 19 20

Chapter 7. Important Notes 7.1 Packing Requirement for Sending the PCB Assembly by post 7.2 Short of Spare Parts while Repairing a Speaker system

21 21 21

Version 1.0

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Service Guide

GHT-V150

Getting Started Conventions Used in this Guide Pay Special Attention: Instructions that are important to remember and may prevent mistakes. Caution: Information that, if not followed, may result in damage to the product.

Safety Precautions The following precautions should be observed in handling the speaker described in this guide: Place the speakers on a flat, level and stable surface. Do not place the speakers in environments subject to mist, smoke, vibration, excessive dust, salty or greasy air, or other corrosive gases and fumes. Do not drop or jolt the speakers. Do not allow anything to drop into the subwoofer case through its ventilator, as it could result in fatal electric shock or fire. Place the unit far enough from other equipments for good heat dissipation. Disconnect the AC power cord from the AC outlet before performing any maintenance on the speakers. Do not perform any maintenance with wet hand. Prevent foreign substances, such as water, other liquids or chemical, from entering the speakers while performing maintenance procedures on the speakers.

Version 1.0

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Service Guide

GHT-V150

Chapter 1. How to Handle Defective Returns 1.1 Overview Receiving Defective speaker form customers

Verifying problems proceeding necessary tests

Function NG

Analyzing possible Function NG

malfunction causes

Deciding & proceeding the rectification methods

Replace necessary defective parts

Proceeding tests to verify if the speaker is functioning normally

Function OK

Return the speakers with proper repackaging to Version 1.0

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Function OK


Service Guide

GHT-V150

1.2 Problems Item

Problem Description

1.2.1 1.2.2 1.2.3 1.2.4

FL/FR, RL/RR channels no sound CEN channel no sound Woofer channel no sound Woofer no power

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Service Guide

GHT-V150

* Attention

Please follow the numbered sequence marked within parenthesis given in individual Flow chat, in that this is the best-recommended sequence to rectify the problems.

1.2.1

FL/FR, RL/RR channels no sound

Problem

FL/FR,RL/RR channels no sound

Analyzer and Identify the Causes Broken or short circuit

Defective IC101,IC100,IC301,U2 03,C302 C301,C223,C234,C22 6,C238,Q200,

Speaker cable dis-connect or speaker damaged

Solutions Check solder points on

Check and replace

Re-connected speaker cable

PCB

defective IC or

or replace defective speakers

components

Version 1.0

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Service Guide 1.2.2

GHT-V150

CEN channel no sound

CEN channel no sound

Problem

Analyzer and Identify the Causes Defective IC101,IC100,IC303,,U 204,C306,C240,C243, Q200

Broken or short circuit

Speaker cable dis-connect or speaker damaged

Solutions Check solder points on

Check and replace

Re-connected speaker cable

PCB

defective IC or

or replace defective speakers

components

1.2.3

Woofer channel no sound

Woofer channel no sound Problem

Analyzer and Identify the Causes Broken or short circuit

Defective IC302,U201,C304,C30

Speaker cable dis-connect or speaker damaged

5,C205,R204,R214

Solutions Check solder points on

Check and replace

Re-connected speaker cable

PCB

defective IC or

or replace defective speakers

components

Version 1.0

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Service Guide 1.2.4

GHT-V150

Woofer no power

Woofer no power

Problem

Analyzer and Identify the Causes Broken or short circuit

Defective U100,Y100,C122,C13 7,U101,U200,R202,U2 05,R200,D200

Speaker cable dis-connect or speaker damaged

Solutions Check solder points on

Check and replace

Re-connected speaker cable

PCB

defective IC or

or replace defective speakers

components

Version 1.0

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Service Guide

GHT-V150

Chapter 2. Specifications Satellite – Center (AT 1KHZ): NO Description

Unit

Specifications

1

Out Power at THD 10%

W

10 ± 2

2

Sensitivity

mV

320 ± 50

3

Freq Response

Hz

4

S/N ratio

dB

40~20K ≧ 55

5

Hum & Noise

mV

≦ 5

Unit

Specifications

(Ref:-3dB) Vol:max

Satellite – Front (AT 1KHZ): NO Description 1

Out Power at THD 10%

W

10± 2

2

Sensitivity

mV

320 ± 50

3

Freq Response

Hz

4

Separation

dB

40~20K ≧ 35

5

S/N ratio

dB

≧ 55

6

Hum & Noise

mV

≦ 5

Unit

Specifications

(Ref:-3dB)

Vol:max

Satellite – Rear (AT 1KHZ): NO Description 1

Out Power at THD 10%

W

10 ± 2

2

Sensitivity

mV

320 ± 50

3

Freq Response

Hz

4

Separation

dB

40~20K ≧ 35

5

S/N ratio

dB

≧ 55

6

Hum & Noise

mV

≦ 5

(Ref:-3dB)

Vol:max

Version 1.0

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Service Guide

GHT-V150

Host (Woofer) (AT 100Hz): NO Description

Unit

Specifications

1

Out Power at THD 10%

W

50± 5

2

Sensitivity

mV

300 ± 50

3

Freq Response

Hz

4

S/N ration

dB

20~20K ≧ 70

5

Hum & Noise

mV

≦ 10

(Ref:-3dB) Vol: max

Version 1.0

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Service Guide

GHT-V150

Chapter 3. Block Diagram

5.1CH INPUT RCA JACK

TDA7265

FL SPEAKER PT2323 5.1CH/AUX INPUT SELECT

4558*3

PT 2258 VOL

FR SPEAKER +

TDA7265

-

C SPEAKER

2.1 AUX CH INPUT RCA JACK

SR SPEAKER TDA7265 4558

SL SPEAKER +

TDA7294

2.1 AUX CH INPUT RCA JACK

-

SUB SPEAKER WOOF LPFSCH

LED DISPLAY SCH

EM78P447 MUE

SDA TO DISPLAY LED SCL

KEY STROKE SCH

TO KEYSTROKE

power sch power sw

AC IN

power fuse

SW-SPST

250V 2A

POWER SUPPLY

AC IN TRANS4

O/P 23V 2.7A 22V*2 1.4A

Version 1.0

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Service Guide

GHT-V150

Chapter 4. Exploded View

Host (Woofer)

Plaque PCB

Panel

Lens LOGO

Wooden

Knob

Key

Input Output PCB

AMP PCB Radiator

Switch Cloth Casing

Horse

6.5" Speaker

Button PVC Cap

Version 1.0

Safety

Transformer

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Iron board


Service Guide

GHT-V150

Satellite (center)

Satellite (front & rear)

LOGO

Version 1.0

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Service Guide

GHT-V150

Chapter 5. Part List NO DESCRIPTION

Qty

UNIT

Part No

1

KYE-V150/BODY/SATELLITE-FL

1

PC

V150-01

2

KYE-V150/BODY/SATELLITE-FR

1

PC

V150-02

3

KYE-V150/BODY/SATELLITE-RL

1

PC

V150-03

4

KYE-V150/BODY/SATELLITE-RR

1

PC

V150-04

5

KYE-V150/BODY/SATELLITE-CEN

1

PC

V150-05

6

SPEAKER UNIT

5

PC

V150-06

7

PVC, Ø8.5/SATE

10

PC

V150-07

8

KYE-V150/BODY/WOOFER/230V-EU

1

PC

V150-08

9

SPEAKER UNIT 6.5” 4 OHM 50W

1

PC

V150-09

10

PCBA KYE-V150

1

PC

V150-10

11

IC TDA7296

1

PC

V150-11

12

IC TDA7497

3

PC

V150-12

13

IC PT2323

1

PC

V150-13

14

IC JRC4558

4

PC

V150-14

15

IC PT2258

1

PC

V150-15

16

IC EM78P447

1

PC

V150-16

17

TRANSFORMER, 230V: 22V*2AC&1.4A;

1

PC

V150-17

4 OHM/2”

23VAC&2.7A 18

AUDIO CABLE, 6RCA to 6RCA, KYE-V150

1

PC

V150-18

19

AUDIO CABLE, 1ST to 2RCA, KYE-V150

1

PC

V150-19

20

CARTON, KYE-V150

2

PC

V150-20

21

CUSHION, KYE-V150

1

SET

V150-21

22

Round Red type Label (NO CARTON)

1

PC

V150-22

23

S/N LABEL (NO CARTON&WOOFEWR)

2

PC

V150-23

24

MANUAL KYE-V150

1

PC

V150-24

25

PE BAG, KYE-V150

1

PC

V150-25

26

PE BAG, KYE-V150

1

PC

V150-26

27

PE BAG, POWER CORD, KYE-V150

1

PC

V150-27

28

PE BAG, AUDIO CABLE

1

PC

V150-28

29

CARDBOARD, ENGLISH, KYE-V150

1

PC

V150-29

Version 1.0

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Service Guide

GHT-V150

Chapter 6. Schematic Diagram

R102 R100

1k

AUXL-IN VCDL-IN

R103

1k 1k

FL IN FR IN CT IN SUB IN SL IN SR IN

R104 R105 R106 R107 R108 R109

1K 1K 1K 1K 1K 1K 6 5 4 3 2 1

2CH INPUT

1 2 3 4 5 6 7 8 9 10 11 MIXO 12 13 14

L1 L2 L3 L4 FLI FRI CTI SUBI SLI SRI MIXO VCC REF GND

C126 10uF/50V

R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 100K 100K 100K 100K 100K 100K 100K 100K 100K 100K

9 8 7 6 5 4 3 2 1

22k

22k C109 273

R1 R2 R3 R4 LPFI LPFO FLO FRO CTO SUBO SLO SRO SCL SDA

C108 153

28 27 26 25 24 23 22 21 20 19 18 17 16 15

FL1 FR1 CT1 SUB1 SL1

IC101 PT2323

R123 100

SR1

R124 100

C125

JK102 FL IN FR IN CT IN SUB IN SL IN SR IN

R111 MIXO

C10410uF/50V C10510uF/50V C10610uF/50V C10710uF/50V C12310uF/50V C12410uF/50V

JK101 VCDR-IN AUXR-IN AUXL-IN VCDL-IN

R110

R125270 R126 270 R127270 R128270 R129270 R130270

47uF/25V 1 2 3 4 5 6 7 8

+9V

SR SPOUT SL SPOUT CE SPOUT FL SPOUT FR SPOUT

SCL

1K

SDA

R101 VCDR-IN AUXR-IN

C10010uF/50V C10110uF/50V C10210uF/50V C10310uF/50V

CN306

5.1CH INPUT

+9V

C11310uF/50V C11410uF/50V C11510uF/50V

IC100 PT2258 1 2 3 4 5 6 7 8 9 10

FL1 FR1 CT1 SUB1 SL1 SR1 C11110uF/50V C11210uF/50V C13210uF/50V

20 19 18 17 16 15 14 13 12 11

FL OUT FR OUT CT OUT +9V C121 47uF/25V SUB OUT SL OUT SR OUT C11910uF/50V C12010uF/50V C13410uF/50V

R138 100

R140 100 R141 R142 R143 R144 R145 R146 100K 100K 100K 100K 100K 100K SDA

R132 R133 R134 R135 R136 R137 100K 100K 100K 100K 100K 100K SCL

C11010uF/50V C12710uF/50V C12810uF/50V C12910uF/50V C13010uF/50V C13110uF/50V

FLI FLO FRI FRO CTI CTO CODE2 CODE1 DGND VCC SCL REF SDA GND SUBI SUBO SLI SLO SRI SRO

C133 100uF/25V

C11610uF/50V C11710uF/50V C11810uF/50V

1 2 3 4 5

SCL SDA GND +5V ST-BY

9 8 7 6 5 4 3 2 1

CN103

GND GND GND SUB OUT CT OUT SL OUT SR OUT FR OUT FL OUT CN101

5 4 3 2 1

ST-BY +5V GND GND +9V CN102

INPUT&VOLUME CONTROL SCH

Version 1.0

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Service Guide

GHT-V150

Chapter 6. Schematic Diagram +5V

+5V

C138

Q100 R131 1K

9015

TRIG1

Q101 9015

TRIG2

1 2 3 4 5 6 7 8

PPA PPB PPC PPD PPE PPF PPG PPDP

C139 100uF/16V

104

R139 1K

DS100 DPY a a b c f b g d e e c d f dp g dp

1 2 3 4 5 6 7 8

DS101 DPY a a b c f b g d e e c d f dp g dp DPY_7-SEG_DP

DPY_7-SEG_DP

D102 DVD

PPA D103 AUX

PPB D104 VCD

Q102

RR166 560

PPC

D105 5.1CH

9015

PPD D106 FR ONT

TRIG3

PPE

R165 1K

D107

REAR

D108

CENTER

PPF PPG D109

SUBWOOFER PPDP

+5V

R112 22K R147 47

C135 10uF/50V

C122 20pF

D100

1 2 3 4 5

X2

1N4148 C136 1uF/50V

Y100 4MHz

R148 22K

C137 20pF

SCL SDA GND +5V ST-BY CN104

X1

U100 1 2 3 4 5 6 7 8 9 10 11 12 13 14

D101 VDD G

R149

100

O/P ST-BY

IRRX

SCL SCA

RE100 3 2 1 REMOTE

TCC VDD NC VSS /INT P50 P51 P52 P53 P60 P61 P62 P63 P64

/RESET OSCI OSCO P77 P76 P75 P74 P73 P72 P71 P70 P67 P66 P65

28 27 26 25 24 23 22 21 20 19 18 17 16 15

R150 220 R151 220 R152 220 R153 220

X2 X1 R154 220 R155 220 R156 220 R157 220

PPDP PPG PPF PPE PPD PPC PPB PPA TRIG3 TRIG2 TRIG1

EM78P447SAP +5V

+5V

U101 24C02

R158 10K R159 10K R160 10K R161 10K R162 10K

S100

POWER

1

S101

MODE

2 3

S102 INPUT

4 R163 10K

GND

VDD

GND

GND

GND

SCL

GND

SDA

R164 10K 24C02

8 7 6 5

SCA SCL

+5v

+5V

MCU SCH Version 1.0

Page 17 of 21


Service Guide

GHT-V150

Chapter 6. Schematic Diagram

C308

R302

R301

33k C307 100pF

22uF/16V 15k

2 1 IC301A MC4558

3

R303

100K

FR OP OUT

R304 100K +9V

R305 C309

33k

R306

C310 100pF

22uF/16V 15k 6

7 5 R319 100k C302 C301 C306 C303 C304 C305 FL OUT FR OUT CT OUT SUB OUT SL OUT SR OUT

10uF/50V 10uF/50V 10uF/50V 10uF/50V 10uF/50V 10uF/50V

FL OP OUT

IC301B MC4558

R320 100k

+9V

R308 C312

33k

R307

R314

SUB OP OUT C317

33k

R313

C311 100pF

22uF/16V 15k

C318 100pF

22uF/16V 15k

2 3

2 3

R316

100K

1 IC303A MC4558

1 IC302A MC4558

SR OP OUT

CT OP OUT R309

100K

R310 100K +9V

R315 100K +9V

R312 C313

33k

R311

C314 100pF

22uF/16V 15k 6

7 5 R317 100k

R318 100k

IC302B MC4558

+9V

O/P AMP SCH

Version 1.0

Page 18 of 21

SL OP OUT


Service Guide

GHT-V150

Chapter 6. Schematic Diagram

+26V 2.6A 1

VCC1

D200 RS608

GND

3

U200 78L09 IN

47

C201 2200uF/16V

2

3 5 4 3 2 1

C200 4700uF/35V

CC1 4700uF/35V

3 R202 10

VCC2 CN202

U205 LM7805 OUT

+9v 1

OUT

+5V 1

IN

GND

R200

2

C204 220uF/16V

2

+26V 4

GND

VCC1 VCC2

SUB

VCC1 VCC1 VCC2 GND VCC2

CON4

1

+-22V 1.4A D201 KBL02G 4

2

+22V

3

C209 4700uF/35V

C210 4700uF/35V -22V

R204 22K

+22V

7

13

C207 220uF/35V

C208 104.C

U201 WOOFER200

2 14 C205

SUB

3

1

_

R211 20k

AM4558

R206 1k

R212 20k C215 473.M

6

R213 22K + _

7 U202B AM4558

R216 33K

R214 680

R215 10K

C218 10uF/50V

S/C Protec tion

-22V C219

10uF/50V

C220 104.C

C206 22uF/25V TDA7296

8

U202A +

4

2

The rma l Shutdown

Mute STBY 1

3 SUB

22uF/16V

100K

C221 220uF/35V

CN205 WOOF OUT200 1 2

R209 20k

R208 101 3.3K C213

ST-BY

C211 4.7uF/50V

IN SUB

R205 100K

333.M C216 5

C217

8

R201

15

4 10 9

4.7uF/50V(NP)

C212 4.7uF/50V

POWER&SUBWOOFER AMP SCH

Version 1.0

Page 19 of 21

WOOF OUT

6

+9V

WOOF OUT


Service Guide

GHT-V150

Chapter 6. Schematic Diagram

+26V

26V 26V

R218 15K

C233 220UF/35V

C229 104

C227 220UF/35V

C224 104

(11)PW_GND

10K

(11)PW_GND C223 R219 100

IN FR

Vs-c(2)

Q200 945

R217 ST-BY

Vs(13)

C228

C225 104

IN SR

C226 1000UF/35V

(1)INR

OUTR(14)

(8)S_GND

MUTE2(9)

Vs-c(2)

SB Vs(13)

C231 1000UF/35V

(1)INR

OUTR(14)

(8)S_GND

MUTE2(9)

FR SPOUT

(4)PW_GND_C

10K R222 C237 1000UF/35V 1UF (5)INL

OUTL(12)

FL SPOUT

CN201

CN200

CN203 CON8

5 4 3 2 1

9 8 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8

10K R223 C242 1000UF/35V 1UF

IN SL

(5)INL

OUTL(12)

IN C

(6)INC

OUTC(3)

C240273

OUTC(3)

(7)SVR

(7)SVR

PW_GND(15)

C241 470UF/25V

U203 TDA7497

ST-BY +5V GND GND +9V

GND GND GND IN FL IN FR IN SL IN SR IN C IN SUB

FR SPOUT FL SPOUT SL SPOUT SR SPOUT CE SPOUT

华纳电子

FL/FR/SL/SR AMP SCH

Version 1.0

Page 20 of 21

CE SPOUT C243 1000UF/35V

(6)INC

1/1

SL SPOUT C244

C238

C235 470UF/25V

MUTE1(10)

C239 273

MUTE1(10)

C234 273

SB 10K R221 C232 1UF

SB 10K R220 C236 1UF

IN FL

SR SPOUT

273

273

(4)PW_GND_C

C230 104

PW_GND(15)

U204 TDA7497


Service Guide

GHT-V150

Chapter 7. Important Notes

7.1 Packing Requirement for Sending the PCB Assembly by Post PCB assembly is a kind of sophisticated electronic circuit board. Well packing will be required when sending them by post. * Some sophisticated IC components are mounted on the PCB assembly, hence it is necessary to pack each PCB assembly with a separate static protecting bag, in order to avoid static electricity. * Reliable external packing is also very important when sending PCB assembly by post, in that it would avoid unnecessarily lost or damage.

7.2 Short of Spare Parts while Repairing a Speaker System If you are short of spare parts when you have some speaker systems waiting to be repaired, it would be recommended to take the necessary parts form one speaker system, so that you may have the as many speaker systems.

Version 1.0

Page 21 of 21

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