Sony MHC-GPX3, HCD-GPX3G Schematic

Ver. 1.0 2012.04

• HCD-GPX3G is the amplifi er, USB, CD player
and tuner section in MHC-GPX3.

HCD-GPX3G

E Model

• “WALKMAN” and “WALKMAN” logo are registered trademarks of

Sony Corporation.

• MPEG Layer-3 audio coding technology and patents licensed from

Fraunhofer IIS and Thomson.

• Windows Media is either a registered trademark or trademark of Microsoft

Corporation in the United States and/or other countries.

• This product contains technology subject to certain intellectual property

rights of Microsoft.
Use or distribution of this technology outside of this product is prohibited
without the appropriate license(s) from Microsoft.

Amplifi er section

The following are measured at
Mexican model:
AC 120 V – 240 V, 60 Hz
Other models:
AC 120 V – 240 V, 50/60 Hz

MHC-GPX3

Front speaker
Power Output (rated):
300 W + 300 W (at 4 ohms, 1 kHz,
1% THD)
RMS output power (reference):
475 W + 475 W (per channel at
4 ohms, 1 kHz)

Inputs

TV/DVD/SAT (AUDIO IN) L/R
Voltage 1.2 V, impedance 47 kilohms
PC/GAME (AUDIO IN) L/R
Voltage 1.2 V, impedance 47 kilohms

(USB) port: Type A

USB section

Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 kbps – 320 kbps, VBR
WMA: 48 kbps – 192 kbps
AAC: 48 kbps – 320 kbps
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32 kHz/44.1 kHz/48 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz

Supported USB device
Mass Storage Class
Maximum current
500 mA

Disc player section

System
Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6 μW
* This output is the value measurement
at a distance of 200 mm from the
objective lens surface on the Optical
Pick-up Block with 7 mm aperture.
Frequency response
20 Hz – 20 kHz
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 88 dB

Tuner section

FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna

FM tuner section

Tuning range

87.5 MHz – 108.0 MHz (100 kHz
step)

Model Name Using Similar Mechanism HCD-EX66/EX88/EX99

CD Section

Mechanism Type CDM76B-D1BD76

Optical Pick-up Block Name DA11MMVGP

SPECIFICATIONS

AM tuner section

Tuning range
Pan American models:
530 kHz – 1,710 kHz (10 kHz step)
531 kHz – 1,710 kHz (9 kHz step)
Other models:
530 kHz – 1,610 kHz (10 kHz step)
531 kHz – 1,602 kHz (9 kHz step)

General

Power requirements
Mexican model: AC 120 V – 240 V, 60 Hz
Other models: AC 120 V – 240 V, 50/60 Hz
Power consumption
180 W
Dimensions (w/h/d) (excl. speakers)
(Approx.)
280 mm × 335 mm × 440 mm
Mass (excl. speakers) (Approx.)

6.0 kg
Supplied accessories
Remote control (1)
R6 (Size AA) batteries (2)
FM lead/AM loop antenna (1)

Design and specifi cations are subject to
change without notice.

9-890-598-01

2012D08-1

2012.04

©

COMPACT DISC RECEIVER

Sony Corporation

Published by Sony EMCS (Malaysia) PG Tec

HCD-GPX3G

Notas sobre reparo do componentes do tipo Chip

• Nunca reutilize um componente tipo chip.

• Informamos que o lado menos dos capacitores de tantalo podem ser
danificados se expostos a altas temperaturas.

5E3$5$(03/$&$6'(&,5&8,72)/(;Ë9(/

• Manter a temperatura do ferro de soldar
durante o reparo.

• Não toque com o ferro de soldar o mesmo condutor chip da
placa (mais de 3 vezes).

• Tenha cuidado para não aplicar
soldar ou dessoldar.

ATENÇÃO

O uso dos controles justes
procedimentos a exceção para
isto radiatição perigosa.

resultar na exposição de

daqueles especificados

Este aparelho é classificado como produto
LASER CLASSE 1. Esta etiqueta está
localizada na parte traseira.

dos ou a ou o desempenho

$7(1d2&2026&20321(17(6'(6(*85$1d$!

OS COMPONENTES IDENTIFICADOS COM A MARCA 0
NOS DIAGRAMAS ESQUEMÃTICOS E NA LISTA DE PEÇAS SÃO
CRÍTICOS PARA SEGURANÇA. SOMENTE OS SUBSTITUA POR
PEÇAS NUMERICAMENTE IDENTIFICADAS NESSE MANUAL
OUEM SUPLEMENTOS PUBLICADOS PELA SONY.

2

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HCD-GPX3G

1. 1OT$S'(6(9,d2 ............................................. 4

2. D(60217$*(0

2-1. Tampa Lado (L), Tampa Lado (R) ................................ 10

2-2. Seção Painel Superior .................................................... 11

2-3. Seção Painel Frontal........................................................ 12

2-4. Placa 2CH DAMP ........................................................... 12

2-5. Seção Painel Traseiro e Chassi ....................................... 13

2-6. Mecanismo CD ............................................................... 13

2-7. Unidade Base .............................................................. 14

2-8. Unidade Ótica ................................................................ 14

3. 02'2 7E67( .......................................................... 15

4. 9(5,),&$d2(/e75,&$.......... ........................ 17

5. DIAGRAM$S

5-1. Diagrama em bloco – Seção CD/USB – ........................ 19

5-2. Diagrama em bloco – Seção MAIN – ............................ 20

5-3. Diagrama em bloco – Seção Display/Fonte de Alimentação ...21

5-4. Placa de circuito Impresso – Placa DISPLAY – ............. 23

5-5. Diagrama Esquemático – Placa DISPLAY (1/2) – ......... 24

5-6. Diagrama Esquemático – Placa DISPLAY (2/2) – ........ 25

5-7. Placa de circuito Impresso – Placa BD76 – ................... 26

5-8. Diagrama Esquemático – Placa BD76 (1/2) – ............... 27

5-9. Diagrama Esquemático – Placa BD76 (2/2) – ............... 28

5-10. Placa de circuito Impresso –

Placa 2CH DAMP (Lado Componente) – ...................... 29

5-11. Placa de circuito Impresso –

Placa 2CH DAMP (Lado Cobreado) – ........................... 30

5-12. Diagrama Esquemático – Placa 2CH DAMP (1/2) – ..... 31

5-13. Diagrama Esquemático – Placa 2CH DAMP (2/2) – ..... 32

5-14. Placa de circuito Impresso – Placas VOLUME e USB –.. 33
5-15. Diagrama Esquemático – Placas VOLUME e USB – ... 34
5-16. Placa de circuito Impresso – Placa TUNER1AM3R – ... 35

5-17. Diagrama Esquemático – Placa TUNER1AM3R – ........ 36

5-18. Diagrama Esquemático - Placa SMPS 3H385W -. ......... 37-1

6. 9,67$EXPLOD,'$

6-1. Seção Aparelho ........................................................... 45

6-2. Seção Painel Frontal....................................................... 46

6-3. Seção Painel Superior..................................................... 47

6-4. Seção Painel Traseiro...................................................... 48

6-5. Seção Chassi ................................................................... 49

7. /,67$'(3(d$6ELeTRICA6 ........................ 50

&$,;$$&Ò67,&$

CAIXA ACÚSTICA - SS-GPX3

VISTA EXPLODIDA - SS-GPX3............................................

LISTA DE PEÇAS ELÉTRICAS ............................................

61
62

3

HCD-GPX3G

SEÇÃO 1

NOTAS DE SERVIÇO

NOTAS SOBRE O MANUSEIO DA BLOCO DE

UNIDADE ÏTICA OU UNIDADE BASE

O diodo laser da unidade optica é sensível a descargas eletroestáticas
podendo vir a ser danificado por descargas causadas por roupas
ou mesmo pelo corpo humano. Durante o reparo tenha cuidado pa­ra não causar danos a unidade, devido a cargas eletroestáticas e siga
corretamente os procedimentos descritos nesse manual para a exe­cução de reparos e troca de componentes.
As placas de circuito impresso flexíveis sao facilmente danificadas
Tenha cuidado ao manuseá-las.

NOTAS SOBRE A EMISSÃO DO DIODO LASER

O feixe laser nesse modelo é concentrado de forma a ser
superfície reflexiva do disco, pela lente objetiva da unidade óptica.
Quando observar a emissão do diodo laser, tome o cuidado de estar
no mínimo a 30 cm da lente objetiva.5

SOLDA SEM CHUMBO

Placas que exigem o uso de solda sem chumbo são impressas com
a marca LF (lead free) indicando que a solda não contém chumbo.
(Atenção: Algumas placas de circuito impresso não podem ter essa

marca devido ao seu tamanho reduzido.)

: IDENTIFICAÇÃO DA SOLDA SEM CHUMBO

A solda livre de chumbo tem as seguintes características:

• Derrete a uma temperatura 40 °C maior que a solda comum.

Ferros de solda comuns podem ser usados mas a ponta tem que

ser aplicada por um tempo maior.

Ferros de solda com regulagem de temperatura devem ser ajusta-

do no valor de 350 °C.
Atenção: A impressao da placa (trilhas de cobre) pode se sol-

tar se a ponta permanecer por muito tempo. Tenha cuidado!

• É mais viscosa
A solda livre de chumbo é mais viscosa (flui com menor faci-

lidade) que a solda comum, portanto tenha cuidado com as
pontes de solda, especialmente entre os pinos de IC's.

• Pode ser utilizada com solda comum
É melhor usar apenas solda sem chumbo mas este tipo também
pode ser adicionado a solda comum.

,DENTIFICAd2'(02'(/2
– 3DLQHO7UDVHLUR –

ANTENNA

FM/AM

.

TV/

PC/

DVD/

GAME

SAT

FRONT SPEAKERS

L

AUDIO

IN

R

Parts No.

HCD-GPX3G: E2, E51%5

HCD-GPX3G: MX

• Abbreviation
E2 : 120V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model

BR : Modelo Brasil

R

L

IMPEDANCE

USE 4

ModelR Part No.

4-411-594-0[]

4-411-594-1[]

RE$LI6$5 275$9$0(172'$ %$1'(-$'2',6&2

A função de travamento da bandeja do disco deve ser utilizada
para evitar o roubo do disco em lojas de departamento.

ReDliVDQGRR ProcedLPHQWR:

1. Pressionar o botão [I/

STANDBY] para ligar o aparelho.

1

2. Pressionar o botão [CD/DISC SKIP] para selecionar a função CD.

3. Manter pressionado o botão [x], e pressionar o botão [ENTER] por
mais 5 segundos).

4. A menssagem “LOCKED” aparece no display e a bandeja de disco esta

travada.

5. Para destravar, manter pressionado o botão [x], e pressionar o botão [ENTER] por
mais 5 segundos).

6. A menssagem “UNLOCKED” aparece no display e a bandeja de disco esta
destravada.

4XDQGR o botão [I/

NotD: 

tDPEpPpGHVDWLYDGD

STANDBY] IRUSUHVVLRQDGRDIXQomR/2&.('

1

4

3OSId2'(6(59,d2 '2 CDM76

HCD-GPX3G

PLACA BD76

326,d2'(6(59,d2 '$6 3/$&$6

base

Placa PANEL

Placa USB

Placa 2CH DAMP

base

Placa SMPS 3H385W

5

HCD-GPX3G

&202$%5,5 $%$1'(-$48$1'22$3$5(/+2(67,9(5'(6/,*$'2

VXSRUWH

pinR

Pu[DU DEDQGHMD FRPDPmR.

6

'(6&$55(*$5CAPACITOR3$5$ 35(9(1,5&+248(ELeTRICO

HCD-GPX3G

Antes de verificar a placa &H DAMP, fazer a
descarga dos capacitores C14H C143

para prevenir choque elétrico.

3laca&+'$03

:

C1431

Antes de verificar a placa 6036ID]HUD
descarga do capacitor CSDUD

prevenir choque elétrico.

&

:

3ODFD6036

:

&

7

HCD-GPX3G

PRECA8d2 48$1'2,167$/$5 A N29$ 81,'$'(Ï7,&$/
PRECAUd2 &20(/(75,&,'$'((67È7,&$$17(6'(5(029(52&8572'(62/'$

4XDQGRLQVWDODUDQRYDXQLGDGHyWLFDHODGHYHVHUconectDGDSULPHLUR
DSODFDGHFLUFXLWRLPSUHVVRDQWHVGHUHPRYHURFXUWRGHVROGD
3DUDSUHYHQLUGDQRVFDXVDGRVSHODHOHWULFLGDGHHstiticD.

(1mRGHPRUHPXLWRWHPSRUHPRYHQGRRFXUWRGHVROGDGDXQLGDGHyWLFD
(Não remova o curto de solda a unidade ótica não estiver conectada a
placa de circuito impresso.)

8

DE6M217$*(0

• This set can be disassembled in the order shown below.

SET

2-1. SIDE CASE (L),
SIDE CASE (R)
(Page 10)

2-2. TOP PANEL SECTION
(Page 11)

HCD-GPX3G

SEd2 2

2-3. FRONT PANEL SECTION
(Page 12)

2-4. 2CH DAMP BOARD
(Page 12)

2-5. BACK PANEL SECTION AND CHASSIS
(Page 13)

2-6. CD MECHANISM DECK
(Page 13)

2-7. BASE UNIT
(Page 14)

2-8. OPTICAL PICK-UP
(Page 14)

9

HCD-GPX3G

Note: Follow the disassembly procedure in the numerical order given.

2-1. 7$03$/$'2 (L), 7$03$/$'2 (R)

two claws

1 two screws
(+BVTP 3 x 14)

4 side case (L)

2 two screws

(+BVTP 3 x 14)

3

6 two screws

(+BVTP 3 x 14)

two claws

7

8 side case (R)

5

two screws

(+BVTP 3x14)

10

2-2. 6(d2PA,NEL 683(5,25

two hooks

HCD-GPX3G

5 two screws

(+BVTP 3 x 14)

6

1 wire (flat type)

(21core)(CN401)

2 wire (flat type)

(5core)(CN001)

3 one screw
(+BVTP 3 x 8)

7 top panel section

4

one screw

(+BVTP 3 x 8)

11

HCD-GPX3G

2-3. FRONT PANEL SECTION

4 front panel section

2

CN801 (7P)

2-4. 3/$&$2CH DAMP

7 HEAT SINK (2CH)

6 two screws

(+PTPWH 2.6XL)

1 three screws
(BVTP 3 x 8)

1 four screws

(BVTP 3 x 8)

3

wire (flat type) (25core)(CN803)

4 wire (flat type)(9core)(CN805)

5 CN1405(3P)

12

8 2CH DAMP board

3 CN3(5P)

2 CN2(9P)

2-5. 6(d2PA,NEL75$6(,52( CHASSI

5

bracket, SMPS (shield)

3 two screws
(BVTP 3 x 8)

6 nine screws
PWH 3 x 8 (SUMITITE)

2

back panel section

1

one screws

(BVTP 3 x 8)

4

two screws

(BVTP 3 x 8)

HCD-GPX3G

2-6. MECANISM2 &D

REGULATOR,

7

SWTCHING board

4 two screws
(+P tapping (B2.6))

CD mechanism deck block

6

9

chassis

8 CN1 (2P)

top lid

5

4 two screws

(+P tapping (B2.6))

2

top panel

3

1 four screws

(+BVTP 3

10)

13

HCD-GPX3G

2-7. 81,'$'(BASE

2 two screws
(+BVTP 2.6 (3CR))

3

two coil springs (insulator)

4

5

two stoppers (BU)

two insulators

two coil springs (insulator)

4

1 two floating screws

(+PTPWH M2.6)

two insulators

5

2-8. 81,'$'(ÏTICA

6 CD MECHANISM DECK

3 optical pick-up

14

Remove the four solders.

1

2 wire (flat type) (16 core)

(CN201)

4 BD76 board

SEd2 3

02'2'(TESTE

HCD-GPX3G

[PANEL TEST MODE]

• This mode is used to check the fl uorescent indicator tube,
LEDs, keys, [MASTER VOLUME] jog, model, destina­tion and software version.

• Procedure:

1. Press [CD] button and [TUNER/BAND] button simultane­ously and hold 3 seconds.

2. All LEDs and segments in fl uorescent indicator tube are
lighted up.

3. When you want to enter to the software version display
mode, press [
appears on the fl uorescent indicator tube.

• “GPX 0” is shown for MHC-GPX3.

Press [
information.

4. During the destination information display
/ ] button. Each time [
fl uorescent indicator tube shows the version of each
category software in the following sequence: SC, UI, PF,
SYS, CD, MM, ST
information display.

5. When [OPTION] button is pressed while the version
numbers are being displayed except model and destination,
the date of the software creation appears. When [OPTION]
button is pressed again, the display returns to the software
version display.

6. Press [

7. In the key check mode, the fl
displays “K 0 V0”.

Each time a button is pressed, “K” value increases. How-

ever, once a button has been pressed, it is no longer taken
into account.

“V” value increases in the manner of 0,1, 2, 3 ... if [MAS-

TER VOLUME] knob is turned clockwise, or it decreases
in the manner of 0, 9, 8,7 ... if [MASTER VOLUME]
knob is turned counterclockwise.

8. When [ENTER] button is pressed after all LEDs and
segments in fl uorescent indicator tube light up, alternate
segments in fl uorescent indicator tube and LEDs would
light up. If you press [ENTER] button again, another half
of alternate segments in fl uorescent indicator tube and
LEDs would light up. Pressing [ENTER] button again
would cause all segments in fl uorescent indicator tube and
LEDs light up.

9. To release from this mode, press three buttons in the same
manner as step 1, or disconnect the power cord.

/ ] button. The model information

+

/ ] button again to view the destination

+

, press [

/ ] button is pressed, the

+

, TA, TM and return back to model

/ ↓]button, the key check mode is activated.

+

uorescent indicator tube

[COMMON TEST MODE]

• This mode is used to check operations of the Amplifi er
section.

• Procedure:

• To enter Common Test Mode

1. Press [USB] button and [BASS BAZUCA] button simulta­neously and hold for 3 seconds.

2. The function is changed to TV and the volume is changed
to VOLUME MIN.

• Check of Amplifi er

1. Press [ROCK] button repeatedly until a message “GEQ
MAX” appears on the fl uorescent indicator tube. GEQ
increases to its maximum.

2. Press [ROCK] button repeatedly until a message “GEQ
MIN” appears on the fl uorescent indicator tube. GEQ
decreases to its minimum.

3. Press [ROCK] button repeatedly until a message “GEQ
FLAT” appears on the fl uorescent indicator tube. GEQ is
set to fl at.

4. When the [MASTER VOLUME] knob is turned clockwise
even slightly, the sound volume increases to its maximum
and a message “VOLUME MAX” appears on the fl uores-
cent indicator tube.

5. When the [MASTER VOLUME] knob is turned counter­clockwise even slightly, the sound volume decreases to its
minimum and a message “VOLUME MIN” appears on the
fl uorescent indicator tube.

• To release from Common Test mode

1. To release from this mode, press [

2. The cold reset is enforced at the same time.

I/1 STANDBY] button.

[USER RESET]

• The user reset clears all data including preset data stored
in the data fl ash to initial conditions exclude history mode

+

data

• Procedure:

1. Press [

2.

3. “RESET” appears on the fl uorescent indicator tube.

After that, the fl uorescent indicator tube becomes blank for

I/1 STANDBY] button to turn on the system.

Press [x] button and
for 3 seconds.

a while, and the system is reset.

[I/

STANDBY]

1

button simultaneously

[COLD RESET]

• The cold reset clears all data including preset data stored in
the data fl ash to initial conditions. Execute this mode when
returning the set to the customer.

• Procedure:

1. Press [

2. Press [ENTER] button and [EQ] button simultaneously for

3. “COLD RESET” appears on the fl uorescent indicator tube.

I/1 STANDBY] button to turn on the system.

3 seconds.

After that, the fl uorescent indicator tube becomes blank for
a while, and the system is reset.

[TUNER STEP CHANGE]

• The step interval of AM channels can be toggled between
9 kHz and 10 kHz. This mode is not available for Saudi
Arabian, European and Russian models.

• Procedure:

1. Press [

2. Press [TUNER/BAND] button repeatedly to select the

3. Press [

4. Press [LED EFFECT] button and [

button simultaneously. The system turns on automatically.

appears on the fl uorescent indicator tube and thus the

I/1 STANDBY] button to turn on the system.

“AM”.

I/1 STANDBY] button to turn off the system.

I/1 STANDBY]

The message “AM 9K STEP” or “AM 10K STEP”

channel step is changed.

[CD TRAY LOCK MODE]

• This mode let you lock the disc tray. When this mode is
activated, the disc tray will not open when [OPEN/CLOSE]
button or [EX-CHANGE] button is pressed. The message
“LOCKED” will be displayed on the fl uorescent indicator
tube. This mode only applied when there is disc(s) on the tray.

• Procedure:

1. Press [

2. Select CD function.

3. Press [

hold down until “LOCKED” or “UNLOCKED” displayed
on the fl uorescent indicator tube (around 5 seconds).

I/1 STANDBY] button to turn on the system.

] button and [ENTER] button simultaneously and

x

15

HCD-GPX3G

[FACTORY PRESET]

• This mode is use to load all the factory use preset frequencies
into FM 1-FM 20 and AM 1-AM 10. Originally, frequency
of FM 1-FM 20 and AM 1-AM10 are set to the minimum
frequency.

• Procedure:

1. Press [

I/1 STANDBY] button to turn on the system.

2. Press [CD] button and [AUDIO IN] button simultaneously
and hold for 3 seconds, message “FACTORY” appears on
the fl uorescent indicator tube. The function is changed to
TUNER automatically.

[CDM AGING MODE]

• This mode is used to display the total count of meter point­er touch initial switch and max switch.

• Procedure:

1. Press [

I/1 STANDBY] button to turn on the system.

2. Select CD function and All DISC play mode

3. Put disc on all tray.

4. Press [

/ ] button and [

+

] button simultaneously for 3

x

seconds.

5. The fl uorescent indicator tube displays Aging

Display “AG xxxx/yyyy”.
“xxxx” represents the error counter
(Maximum Value of “xxxx” = 9999)
“yyyyy” represents the cycle counter
(Maximum Value of “yyyy” = 9999)

6. Press [<<] or [>>] to search for Aging History

Error Display
The fl uorescent indicator tube displays
“Mx E1E2E3E4”.
x: error history number
E1: Loading sequence JCP high
E2: Loading sequence JCP low
E3: Loading operation JCP
E4: Cam position operation JCP

7. Press [ENTER] to Aging Display

• To release from Meter Aging Mode.

To release from this mode, press [

I/1 STANDBY] button or

perform COLD RESET operation.

[HISTORY MODE]

• This mode is used to check important data stored in the
system when PROTECTOR happen.

• Procedure:

1. During demo mode, press [

BAZUCA] for 5 seconds to mode in to history mode.

2. Press the [TUNING +] or [TUNING -] button to check

history data stored

Item Display

Protector Count

PROCOUNT

Protector Type P R O T Y P E

Single Power On
Time

Total Power On
Time

T1 H M

T2

Input Function F U N C

Volume V O L

Actual
Attenuation

ATT

Low EQ Level E Q L O W

Mid EQ Level E Q M I D

High EQ Level E Q H I G H

u] button and [BASS

H M

VACS Level V A C S

AP VACS Level A P V A C S

Surround Setting S U R R

Bass Bazuca
Setting

BAZUCA

• To release from History Mode.
To release from this mode, press [

I/1 STANDBY] button.

[PROTECT KIND CHECK TEST MODE]

• This mode is used to check types of protect occurred during
protector on.

• Procedure:

3. During protection on, fl uorescent indicator tube shows

blinking message “PROTECT EXX”.
“EXX” – represent the error code.

4. Press [

u] button & [

5. Fluorescent indicator tube display will toggle between

“PROTECT” message & protector kind message display.
Bellow table explains on protector kind.

Error Code Protector Message Description

E01 "AMP OCP"

E02 "MTK POWER" No power supply to DMB mount

E03 "POWER SUPPLY" Defect of power supply circuit to AMP

E04 "AMPLIFIER" Defect of AMP circuit

E06 “FAN BLOCK”

• To release from this mode.

Press [

u] button & [

unplug & re-plug in the power cord.

1. Defect of AMP circuit

1-1. If PROTECT mode is “AMPLIFIER”,

The following defect might be possible.

Defects Possible cause

OTP (Over Tempera-

ture Protection)

DC Detection

Unusual output of

Power mount

1-2. If speaker does not have output even if the set status
is not in PROTECT mode

The following defect might be possible.

Defects Possible cause
Under Voltage IC1402 output is below 12V.
RESET defect Reset signal status from micom is not ‘H’ .

2. Defect of power supply circuit to AMP
2-1. If the PROTECT mode is “POWER SUPPLY”,

There is possibility of unusual power supply of any of the
AMP IC or Pre-amplifi er.

• To release from this mode.

Press [

u] button and [

or unplug and re-plug in the power cord.

] button simultaneously.

x

The overcurrent condition to MOS­FET occurs by defect of MOSFET or
defect of PS output line.

Defect of DC FAN and DC FAN
driver circuit

] button simultaneously again or

x

Unusual heat up of MOSFET by im­proper assembly of heatsink, destruction
of MOSFET etc..
DC appears in SP terminal by defect of
AMP IC and MOSFET or output is short­circuit.

The power mount has unusual output.

] button simultaneously again

x

16

SEd2 4

9(5,),&$d2ELeTRIC$

HCD-GPX3G

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment.

2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat­ed.

3. Use an oscilloscope with more than 10 M impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following checks.

5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

oscilloscope

(DC range)

BD76 board

CL102 (RFOUT)

CL117 (VREF)

Procedure:

1. Connect the oscilloscope to CL102 (RFOUT) and CL117
(VREF) on the BD76 board.

2. Press the [

] button to turn the power on, and press the [CD]

?/1

button to select CD function.

3. Set disc (YEDS-18) and press the [

4. Confi rm that oscilloscope waveform is as shown in the fi gure
below (eye pattern).

A good eye pattern means that the diamond shape (◊) in the

center of the waveform can be clearly distinguished.

+
–

] button to playback.

u

VOLT/DIV: 200 mV
TIME/DIV: 500 ns

TUNER SECTION

0 dB = 1 V

FM AUTO STOP CHECK

signal

generator

set

+

75 :

–

Procedure:

1. Turn the power on.

2. Input the following signal from Signal Generator to FM an­tenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)

Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You

cannot use video cable for checking.

Please use SG whose output impedance is 75 ohm.

3. Set to FM tuner function and scan the input FM signal with
automatic scanning.

4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.

Checking Location:
– BD76 Board (Side B) –

CL102

(RFOUT)

IC101

CL117

(VREF)

level:

1.1 ± 0.4 Vp-p

The stop of automatic scanning means “The station signal is re­ceived in good condition”.

17

HCD-GPX3G

• /RFDOL]DomRGDVSODFDV

3ODFDDISPLAY

SEd2 5

DIAGRAM$S

3ODFDBD76

3ODFDLOADING

3ODFDTUNER1AM3R

3ODFDVOLUME

3ODFDUSB

3ODFD2CH DAMP

3ODFDS036+:

18

5-1. ',*5$0$(0%/2&2 –6HomRCD/USB –

OPTICAL PICK-UP BLOCK

(DA11MMVGP)

5AIN
7
6CIN

8DIN
13
14

18 LDD

19

11 VREF

25 SPDO

24 SLDO

23 TDO

22 FDO

VREF

SP+

SL+

A
B
C
D
E
F

LD

MD

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

SP-

SL-

T+

T-

F+

F-

1

12

17

27

AUTOMATIC

POWER

CONTROL

Q201

IC301

VO1+2
VO1­VO2+11
VO2­VO3+18
VO3­VO4+26
VO4-

MUTE

BIAS

IN2’

IN3’

IN4’

23

3

IN1

9

20

24

7

BIN

EIN
FIN

LDS

CD-MP3 PROCESSOR

IC101

LCHO

RCHO R-ch78

RESB

LIMIT-SW

HCD-GPX3G

76

47

CD MECHANISM DECK

(CDM76B-D1BD76)

M+

M-

OPEN SW

CLOSE SW

32

S001

(LIMIT)

LOADING MOTOR DRIVE

IC505

OUT2

2

OUT1

4

RIN

FIN

VREF

9

7

MOTOR

CONTROL

1

Q518

41

CD-RST

CD-M+

23

CD-M-

25

MTR-OPEN

27

MTR-CLOSE

28

CD-M-MUTE

40

SYSTEM CONTROL

IC501 (1/3)

CD/USB-L

A

MAIN

Section

(Page 20)

CN1000

3

D+

2

D-

(USB)

1

4

5FKLVRPLWWHGGXHWRVDPHDV/FK

6LJQDOSDWK

: AUDIO

: CD

: USB

VBUS+5V

X901

12MHz

38 UHD+

37 UHD-

CF1

6

CF2

7

USB CONTROL

IC901

LRCK 28

BCLK

SDAT

P20
P70
P24
P22

SI0 10

SO0

SCK0

P16 15

URX1

UTX1

P71

RES 2

DBGP0
DBGP1
DBGP2 25

XOUT

72

X101

73

43CE

44CL
45DI

46DO

DBGP0
DBGP1

DBGP2

16.934MHz

9

CN901

8

FLASH

( )

PROGRAMMING

7
5

42

CD-CE
CD-CLK

37

CD-DO

35
36

CD-DI

USB-TXD24
USB-RXD

22

USB-SLEEP

38
43

USB-RST

SFT-DEBUG 1

SFT-DEBUG 4
SFT-DEBUG 3

SFT-DEBUG 2 32

CNVSS 9

RESET

31

34

33

DISPLAY/POWER

B

8

2

3
5

6

7

Section

(Page 21)

CN500

(PROGRAMMING)

PCMLRSY

62

PCMBCK

27

26

32
46
33
31

9

11

44
45
47

23
24

63

64

65
33
34
35

PCMDATA

PCMREQ
STREQ
STCK
STDATA

XIN

TRESET

HCD-GPX3G

1919

HCD-GPX3G

5-2. ',$*5$0$(0BLOC2 –6HomRMAIN –

(Page 19)

ANTENNA

FM/AM

CD/USB

Section

FM

AM

AM

AUDIO

IN

CN103

3

2

1

14

CD/USB-L

A

TV/

PC/

DVD/

GAME

SAT

J801

L

R

FL101

BAND-PASS

FILTER

L101

6LJQDOSDWK

: AUDIO

: FM/AM

AM/FM-DET,OSC,MIX,PLL,IF AMP

FRF1

4

ARF2

7

ARF1

6

LOUT

ROUT

IIC/RDSI

8CK10DA13

X1

X2

IC101

15

14

18

19

Q525,D520

VAC S

CONTROL

R-ch

X101

32.768kHz

+

POWER

ILLUMINATOR

CONTROL
Q803,D801

29

1

30

28

2

40

31

39

4

CDMP3-L

CDMP3-R

TV-L

DVD-L

DVD-R

TV-R

ST-L

ST-R

SAOUT

INPUT SELECTOR

IC800

CLOCK

DATA

15 16

OUT 1

BB11
BB21

OUT 2

BB22
BB12

INA-

MUTE

SWITCH

Q805

2

INB+

5

DBFB CTL

Q804

DBFB CTL

Q806

PREAMP

17

18
19

14

13
12

MUTE
DRIVE

Q517

IC1404

AOUT

BOUT

1

CEC DATA SWITCH

Q1411

75

INB+

BOUT

CLOCK

IC1411

AOUT

INA+

13

7

CEC DATA SWITCH

Q1410

SWITCH
DRIVER

Q1479

SWITCH
DRIVER

Q1407

RESET

SWITCH

Q1416

RESET

SWITCH

Q1417

3

IN

CSD

5

3

IN

CSD

5

HO

POWER AMP

IC1408

LO

HO

POWER AMP

IC1409

LO

OTP DRIVE

Q1469, 1470

SD-SLOW DRIVE

Q1474

11

14

11

BOOSTER

BOOSTER

TH1402

BOOSTER

BOOSTER

TH1403

COMPARATOR

IC1405

OUT

1

PROTECTION

Q1449

Q1420

Q1421

Q1424

Q1425

IN

D1417

2

PROTECTION

Q1448

PROTECTION

Q1445,1456

PROTECTION

Q1446,1457

D1403

D1435

TB4001

3

2

L

FRONT SPEAKERS

,03('$1&(86(ȍ

R

DISPLAY/

AMP-RST

C

POWER
Section

(Page 21)

HCD-GPX3G

47

ST-DATA

48

50

ST-CLK

ST-RDS

66

VACS

65

ILLUM

51

52

AUDIO-CLK

AUDIO-DATA

45

FRT-MUTE

SYSTEM CONTROL

IC501 (2/3)

2020

26

AMP-CLK

56

AMP-OCP

58

AMP-RST

55

/SD-SLOW

FAN-DRIVE

FAN-LOCK

FAN MOTOR DRIVE

57

53

Q1439, Q1441,
Q1451, Q1453,

Q1458

FAN MOTOR LOCK

Q1447

DC FAN