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
Page 5 of 21
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
Version 1.0
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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
Page 7 of 21
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
Page 8 of 21
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
Page 9 of 21
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
Page 13 of 21
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
Page 16 of 21
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
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