Sony CDXGT-48-UM, CDXGT-480-U, CDXGT-480-US, CDXGT-484-US Service manual

CDX-GT48UM/GT480U/

GT480US/GT484US

SERVICE MANUAL

Ver. 1.0 2008.11

Photo: CDX-GT480US

• The tuner and CD sections have no adjustments.

SPECIFICATIONS

E Model

CDX-GT480U/GT480US

Indian Model

CDX-GT48UM/GT484US

Model Name Using Similar Mechanism NEW CD Drive Mechanism Type MG-101Y-188//C Optical Pick-up Name DAX-25A

CD player section

Signal-to-noise ratio: 120 dB Frequency response: 10 – 20,000 Hz Wow and ﬂ utter: Below measurable limit

Tuner section FM

Tuning range:

87.5 – 108.0 MHz (at 50 kHz step)

87.5 – 107.9 MHz (at 200 kHz step)

FM tuning interval: 50 kHz/200 kHz switchable Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency: 150 kHz Usable sensitivity: 10 dBf Selectivity: 75 dB at 400 kHz Signal-to-noise ratio: 70 dB (mono) Separation: 40 dB at 1 kHz Frequency response: 20 – 15,000 Hz

Tuning range:

531 – 1,602 kHz (at 9 kHz step) 530 – 1,710 kHz (at 10 kHz step)

AM tuning interval: 9 kHz/10 kHz switchable Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency: 25 kHz Sensitivity: 26 μV

USB Player section

Interface: USB (Full-speed) Maximum current: 500 mA

Power ampliﬁ er section

Outputs: Speaker outputs (sure seal connectors) Speaker impedance: 4 – 8 ohms Maximum power output: 52 W × 4 (at 4 ohms)

General

Outputs:

Audio outputs terminal (front, sub/rear switchable) Power antenna (aerial) relay control terminal Power ampliﬁ er control terminal

Inputs:

Remote controller input terminal Antenna (aerial) input terminal AUX input jack (stereo mini jack) USB signal input terminal

Tone controls:

Low: ±10 dB at 60 Hz (XPLOD) Mid: ±10 dB at 1 kHz (XPLOD) High: ±10 dB at 10 kHz (XPLOD) Power requirements: 12 V DC car battery (negative ground (earth))

Power supply voltage: 11 – 16 V Dimensions: Approx. 178 × 50 × 179 mm

/8 × 2 × 7 1/8 in.) (w/h/d)

Mounting dimensions:

Approx. 182 × 53 × 162 mm (7 1/4 × 2 1/8 × 6 1/2 in.) (w/h/d)

Mass: Approx. 1.2 kg (2 lb. 11 oz.) Supplied accessories:

Card remote commander: RM-X151 Parts for installation and connections (1 set)

Design and speciﬁ cations are subject to change without notice.

9-889-365-01

2008K04-1

2008.11

FM/AM COMPACT DISC PLAYER

Sony Corporation

Audio&Video Business Group Published by Sony Techno Create Corporation

CDX-GT48UM/GT480U/GT480US/GT484US

MODEL IDENTIFICATION

The CDX-GT480U and CDX-GT480US include the model manufactured in Chinese and the model manufactured in Thai. This service manual guides the model manufactured in Chinese. Check the part number speciﬁ ed on the model number label when performing service and inspection.

–Bottom View–

FRONT PANEL Part No.

Model Part No.

GT480U: E

GT480US: E GT480US: MX

GT480US: AR GT484US: IND GT48UM: IND

• Abbreviation AR : Argentina model IND : Indian model MX : Mexican model

4-119-904-0[] 4-119-905-0[]

4-119-906-0[] 4-119-907-0[]

4-119-908-0[] 4-119-909-0[] 4-119-910-0[] 4-119-911-0[]

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reﬂ ective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

NOTES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

TEST DISCS

Please use the following test discs for the check on the CD section.

YDES-18 (Part No. 3-702-101-01) PATD-012 (Part No. 4-225-203-01)

CAUTION

Use of controls or adjustments or performance of procedures other than those speciﬁ ed herein may result in hazardous radia- tion exposure.

If the optical pick-up block is defective, please replace the whole optical pick-up block. Never turn the semi-ﬁ xed resistor located at the side of optical pick-up block.

optical pick-up

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The ﬂ exible board is easily damaged and should be handled with care.

SAFETY-RELATED COMPONET WARNING!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

semi-fixed resistor

CDX-GT48UM/GT480U/GT480US/GT484US

This compact disc player is classiﬁ ed as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the exterior.

This label is located on the bottom of the chassis.

• CD Playback

You can play CD-DA (also containing CD TEXT) and CDR/CD-RW (MP3/WMA/AAC ﬁ les).

Type of disc Label on the disc

CD-DA

MP3

WMA

AAC

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to ﬂ ow)

than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

TABLE OF CONTENTS

1. SERVICE NOTE ...................................................... 4

2. GENERAL

Location of Controls ....................................................... 5

Connections .................................................................... 6

3. DISASSEMBLY

3-1. Sub Panel Assy ............................................................... 9

3-2. CD Mechanism Block ..................................................... 9

3-3. Main Board ..................................................................... 10

3-4. Servo Board .................................................................... 10

3-5. Chassis (T) Sub Assy ...................................................... 11

3-6. Roller Arm Assy .............................................................. 11

3-7. Chassis (OP) Assy ........................................................... 12

3-8. Chucking Arm Sub Assy ................................................. 12

3-9. Sled Motor Assy .............................................................. 13

3-10. Optical Pick-up Section .................................................. 14

3-11. Optical Pick-up ............................................................... 14

4. DIAGRAMS

4-1. Block Diagram –Main Section– ..................................... 15

4-2. Block Diagram –Display Section– ................................. 16

4-3. Printed Wiring Board –Main Section– ............................ 18

4-4. Schematic Diagram –Main Section (1/3)– ...................... 19

4-5. Schematic Diagram –Main Section (2/3)– ...................... 20

4-6. Schematic Diagram –Main Section (3/3)– ...................... 21

4-7. Printed Wiring Boards –Key Section– ............................ 22

4-8. Schematic Diagram –Key Section– ................................ 23

5. EXPLODED VIEWS

5-1. Main Section ................................................................... 29

5-2. Front Panel Section ......................................................... 30

5-3. CD Mechanism Section (MG-101Y-188//C) .................. 31

6. ELECTRICAL PARTS LIST .................................. 32

CDX-GT48UM/GT480U/GT480US/GT484US

SECTION 1

SERVICE NOTE

EXTENSION CABLE AND SERVICE POSITION

When repairing or servicing this set, connect the jig (extension cable) as shown below.

• Connect the MAIN board (CN701) and the SERVO board (CN401) with the extension cable (Part No. J-2502-076-1).

MAIN BOARD CN701

J-2502-076-1

NOTE FOR REPLACEMENT OF THE USB CONNECTOR (CN902)

To replace the USB connector requires alignment.

1. Insert the USB connector into the front panel.

2. Place the KEY board on the front panel and align the terminals of the USB connector with the holes in the KEY board.

3. Solder the four terminals of the connector.

KEY board

USB (socket) connector

SERVO BOARD CN401

NOTE FOR REPLACEMENT OF THE SERVO BOARD

When repairing, the complete SERVO board (Part No. A-1555-002-A) should be replaced since any parts in the SERVO board cannot be repaired.

NOTE FOR THE 20-PIN CONNECTOR (CN901)

Do not use alcohol to clean the 20-pin connector (CN901) connecting the front panel with the main body. Do not touch the connector directly with your bare hand. Poor contact may be caused.

front panel

• LOCATION OF CONTROLS





RMX

  



Location of controls and basic operations

Main unit

OFF

SEEK

SOURCE

MODE

SEEK

BR

Card remote commander RM-X151



OFF



SOURCE

DSPL

132

465

SEL

–

VOL

–

PUSH ENTER/ SELECT

ATT

MODE

SCRL

ALBMARTIST TRACK SHUF ZAP

REP SHUF SCRL

ALBM

1 2 3 4 5 6

BTMZAP

XG XH

This section contains instructions on the location of controls and basic operations. For details, see the respective pages. For USB device operation, see “USB devices” on page 10. The corresponding buttons on the card remote commander control the same functions as those on the unit.

" OFF button

To power off; stop the source.

# (BACK) button page 8

To return to the previous display.

$ SOURCE button

To power on; change the source (Radio/CD/ USB/AUX).

% (BROWSE) button page 8

To enter the Quick-BrowZer mode.

& Control dial/select button

To adjust volume (rotate); select setup items (press and rotate).

' Disc slot

Insert the disc (label side up), playback starts.

( Display window ) ;(eject) button

To eject the disc.

* USB terminal page 10

To connect to the USB device.

CDX-GT48UM/GT480U/GT480US/GT484US

SECTION 2

GENERAL

+ SEEK +/– buttons

CD/USB:





LOUDDISCREGTPTAAF

AUX

PAUSE

DSPL



To skip tracks (press); sk ip tra cks continuously (press, then press again within about 1 second and hold); reverse/fastforward a track (press and hold). Radio: To tune in stations automatically (p ress); f ind a station manually (press and hold).

, (front panel release) button page 5

- MODE button page9

To select the radio band (FM/AM).

. Receptor for the card remote

commander

/ RESET button (located behind the front

panel) page 4

0 ZAP button page 9

To enter ZAPPIN™ mode.

1 BTM button page 9

To start the BTM function (press and ho l d ) .

2 Frequency select switch (located on the

bottom of the unit) See “Frequency select switch” in the supplied installation/connections manual.

3 Number buttons

CD/USB:

/: ALBM –/+ (during MP3/WMA / AAC playback)

To skip albums (press); skip albums continuously (press and hold).

: REP page 10, 11 : SHUF page 10, 11 : DM+

Improves digitally compressed sound, such as MP3. To activate the DM+ function, set “ON.” To cancel, set “OFF.”

: PAUS E

To pause play back. To cancel , press again.

Radio: To receive stored stations (press); store stations (press and hold).

4 DSPL (display)/SCRL (scroll) button

page 10, 11

To change display items (press); sc roll the display item (press and hold).

5 AUX inpu t jack page 13

To connect a portable audio device.

This section is extracted from instruction manual.

The following buttons on the card remote commander have also differ ent b ut ton s/ func ti ons from the unit. Remove the insulation film before use (page 4).

XB  ()/ () buttons

To control radio/CD/USB, the same as 4&&, –/+ on the unit. Setup, sound setting, etc., can be operated by .

XT D

SPL (display) button page 10, 11

hange display items .

To c

VOL (volume) +/– button

To adjust volume.

XG ATT ( atte nua te) but ton

To attenuate the sound. To cancel, press again.

XH SEL (select) button

The same as the select button on the unit.

XI . (+)/N (–) buttons

To control CD/USB, the same as / (ALBM –/+) on the unit. Setup, sound setting, etc., can be operated by .N.

XK SCRL (scroll) button

To scroll the display item.

XL Number buttons

To receive stored stations (press); store stations (press and hold).

Note

If the unit is turned off and the display disappea rs, it cannot be operated with the card remo te commander unless 4063$& on the unit is pressed, or a disc is inserted to activate the unit first.

CDX-GT48UM/GT480U/GT480US/GT484US

• CONNECTION

• Except CDX-GT480US: Argentina model

Left Izquierdo

Right Derecho

Left Izquierdo

Right Derecho

from car antenna (aerial) desde la antena del automóvil

AMP REM



Max. supply current 0.3 A Corriente máx. de alimentación de 0,3 A

REAR / SUB

AUDIO OUT

Blue/white striped Con rayas azules y blancas

White Blanco

White/black striped Con rayas blancas y negras

Gray Gris

Gray/black striped Con rayas grises y negras

Green Verde

Green/black striped Con rayas verdes y negras

Purple Morado

Purple/black striped Con rayas moradas y negras

REAR/SUB FRONT

AUDIO OUT

FRONT

AUDIO OUT

Fuse (10 A) Fusible (10 A)



Black Negro

Blue Azul

Red Rojo

Yellow Amarillo

REMOTE

Max. supply current 0.1 A Corriente máx. de alimentación de 0,1 A

ANT REM

*1 RCA pin cord (not supplied)

AUDIO OUT can be switched SUB or

REAR. For details, see the supplied Operating Instructions.

Inser t with the cord upwards.

Cable con terminales RCA (no

suministrado)

AUDIO OUT (salida de audio) puede cambiarse a SUB o REAR. Para



obtener información, consulte el manual de instrucciones suministrado.

Inser tar con el cable hacia arriba.







Connection diagram

 To a metal surface of the car

First connect the black ground (earth) lead, then connect the yellow, and red power supply leads.

 To the power antenna (aerial) control lead or

power supply lead of antenna (aerial) booster ampliﬁer

Notes

• It is not necessary to connect this lead if there is no power antenna (aerial) or antenna (aerial) booster, or with a manually-operated telescopic antenna (aerial).

• When your car has a built-in FM/AM antenna (aerial) in the rear/side glass, see “Notes on the control and power supply leads.”

 To AMP REMOTE IN of an optional power

ampliﬁer

This connection is only for ampliﬁers. Connecting any other system may damage the unit.

 To the +12 V power terminal which is

energized in the accessory position of the ignition key switch

Notes

• If there is no accessory position, connect to the +12 V power (battery) terminal which is energized at all times.

Be sure to connect the black ground (earth) lead to a

metal surface of the car ﬁrst.

• When your car has a built-in FM/AM antenna (aerial) in the rear/side glass, see “Notes on the control and power supply leads.”

 To the +12 V power terminal which is

energized at all times

Be sure to connect the black ground (earth) lead to a metal surface of the car ﬁrst.

Notes on the control and power supply leads

• The power antenna (aerial) control lead (blue) supplies +12 V DC when you turn on the tuner.

• When your car has built-in FM/AM antenna (aerial) in the rear/ side glass, connect the power antenna (aerial) control lead (blue) or the accessory power supply lead (red) to the power terminal of the existing antenna (aerial) booster. For details, consult your dealer.

• A power antenna (aerial) without a relay box cannot be used with this unit.

Memory hold connection

When the yellow power supply lead is connected, power will always be supplied to the memory circuit even when the ignition switch is turned off.

Notes on speaker connection

• Before connecting the speakers, turn the unit off.

• Use speakers with an impedance of 4 to 8 ohms, and with

adequate power handling capacities to avoid its damage.

• Do not connect the speaker terminals to the car chassis, or connect the terminals of the right speakers with those of the left speaker.

• Do not connect the ground (earth) lead of this unit to the negative (–) terminal of the speaker.

• Do not attempt to connect the speakers in parallel.

• Connect only passive speakers. Connecting active speakers

(with built-in ampliﬁers) to the speaker terminals may damage the unit.

• To avoid a malfunction, do not use the built-in speaker leads installed in your car if the unit shares a common negative (–) lead for the right and left speakers.

• Do not connect the unit’s speaker leads to each other.

Note on connection

If speaker and ampliﬁer are not connected correctly, “FAILURE” appears in the display. In this case, make sure the speaker and ampliﬁer are connected correctly.

Diagrama de conexión

 A una superﬁcie metálica del automóvil

Conecte primero el cable de conexión a masa negro, y después los cables amarillo y rojo de fuente de alimentación.

 Al cable de control de la antena motorizada

o al cable de fuente de alimentación del ampliﬁcador de señal de la antena

Notas

• Si no se dispone de antena motorizada ni de ampliﬁcador de antena, o se utiliza una antena telescópica accionada manualmente, no será necesario conectar este cable.

• Si el automóvil incorpora una antena de FM/AM en el cristal trasero o lateral, consulte “Notas sobre los cables de control y de fuente de alimentación”.

 A AMP REMOTE IN de un ampliﬁcador de

potencia opcional

Esta conexión es sólo para ampliﬁcadores. La conexión de cualquier otro sistema puede dañar la unidad.

 Al terminal de alimentación de +12 V que

recibe energía en la posición de accesorio del interruptor de encendido

Notas

• Si no hay posición de accesorio, conéctelo al terminal de alimentación (batería) de +12 V que recibe energía sin interrupción.

Asegúrese de conectar primero el cable de conexión a

masa negro a una superﬁcie metálica del automóvil.

• Si el automóvil incorpora una antena de FM/AM en el cristal trasero o lateral, consulte “Notas sobre los cables de control y de fuente de alimentación”.

 Al terminal de alimentación de +12 V que

recibe energía sin interrupción

Asegúrese de conectar primero el cable de conexión a masa negro a una superﬁcie metálica del automóvil.

Notas sobre los cables de control y de fuente de alimentación

• El cable de control de la antena motorizada (azul) suministrará cc de +12 V cuando conecte la alimentación del sintonizador.

• Si el automóvil dispone de una antena de FM/AM incorporada en el cristal trasero o lateral, conecte el cable de control de antena motorizada (azul) o el cable de fuente de alimentación auxiliar (rojo) al terminal de alimentación del ampliﬁcador de antena existente. Para obtener más información, consulte a su distribuidor.

• Con esta unidad no es posible utilizar una antena motorizada sin caja de relé.

Conexión para protección de la memoria

Si conecta el cable de fuente de alimentación amarillo, el circuito de la memoria recibirá siempre alimentación, aunque apague el interruptor de encendido.

Notas sobre la conexión de los altavoces

• Antes de conectar los altavoces, desconecte la alimentación de la unidad.

• Utilice altavoces con una impedancia de 4 a 8 ? con la capacidad de potencia adecuada para evitar que se dañen.

• No conecte los terminales de altavoz al chasis del automóvil, ni conecte los terminales del altavoz derecho con los del izquierdo.

• No conecte el cable de conexión a masa de esta unidad al terminal negativo (–) del altavoz.

• No intente conectar los altavoces en paralelo.

• Conecte solamente altavoces pasivos. Si conecta altavoces

activos (con ampliﬁcadores incorporados) a los terminales de altavoz, puede dañar la unidad.

• Para evitar fallas de funcionamiento, no utilice los cables de altavoz incorporados instalados en el automóvil si la unidad comparte un cable negativo común (–) para los altavoces derecho e izquierdo.

• No conecte los cables de altavoz de la unidad entre sí.

Nota sobre la conexión

Si el altavoz y el ampliﬁcador no están conectados correctamente, aparecerá “FAILURE” en la pantalla. Si es así, compruebe la conexión de ambos dispositivos.

• CONNECTION

REAR/SUB FRONT

AUDIO OUT

REMOTE

13 57

24 68

FRONT

AUDIO OUT

REAR / SUB

AUDIO OUT

• CDX-GT480US: Argentina model

CDX-GT48UM/GT480U/GT480US/GT484US



*1 from car antenna (aerial)

desde la antena del automóvil

AMP REM

Max. supply current 0.3 A Corriente máx. de alimentación de 0,3 A

*1 Note for the antenna (aerial) connecting

If your car antenna (aerial) is an ISO (International Organisation for Standardisation) type, use the supplied adaptor  to connect it. First connect the car antenna (aerial) to the supplied adaptor, then connect it to the antenna (aerial) jack of the master unit.

RCA pin cord (not supplied)

AUDIO OUT can be switched SUB or REAR. For details,

see the supplied Operating Instructions.

Inser t with the cord upwards.

Nota sobre la conexión de la antena

Si la antena del automóvil es del tipo ISO (International Organization for Standardization), emplee el adaptador suministrado  para conectarla. En primer lugar, conecte la antena del automóvil al adaptador suministrado y, a continuación, a la toma de antena de la unidad principal.

Cable con terminales RCA (no suministrado)

AUDIO OUT (salida de audio) puede cambiarse a SUB o

REAR. Para obtener información, consulte el manual de instrucciones suministrado.

Inser tar con el cable hacia arriba.

Fuse (10 A) Fusible (10 A)

Blue/white striped Con rayas azules y blancas



See “Power connection diagram” on the reverse side for details.

Para obtener más información, consulte el “Diagrama de conexión de la alimentación” que encontrará al dorso.

Purple

Morado

2–

Gray

Gris

4–

White

Blanco

6–

Green

Verde

8–

Negative polarity positions 2, 4, 6, and 8 have striped leads. Los cables de las posiciones de polaridad negativa 2, 4, 6 y 8 son rayados.

from the car’s speaker connector desde un conector de altavoces del automóvil

from the car’s power connector desde un conector de alimentación auxiliar del automóvil

Yellow

Amarillo

Blue

Azul

Red

Rojo

Black

Negro

Positions 1, 2, 3 and 6 do not have pins. Las posiciones 1, 2, 3 y 6 no tienen pines.

Speaker, Rear, Right

Altavoz, posterior, derecho

Speaker, Rear, Right

Altavoz, posterior, derecho

Speaker, Front, Right

Altavoz, frontal, derecho

Speaker, Front, Right

Altavoz, frontal, derecho

Speaker, Front, Left

Altavoz, frontal, izquierdo

Speaker, Front, Left

Altavoz, frontal, izquierdo

Speaker, Rear, Left

Altavoz, posterior, izquierdo

Speaker, Rear, Left

Altavoz, posterior, izquierdo

continuous power supply

fuente de alimentación continua

power antenna (aerial) control

control de la antena motorizada

switched power supply

fuente de alimentación conmutada

earth masa

Connection diagram

" To AMP REMOTE IN of an optional power

ampliﬁer

This connection is only for ampliﬁers. Connecting any other system may damage the unit.

Warning

If you have a power antenna (aerial) without a relay box, connecting this unit with the supplied power connecting lead  may damage the antenna (aerial).

Notes on the control and power supply leads

• The power antenna (aerial) control lead (blue) supplies +12 V DC when you turn on the tuner.

• A power antenna (aerial) without a relay box cannot be used with this unit.

Memory hold connection

When the yellow power supply lead is connected, power will always be supplied to the memory circuit even when the ignition switch is turned off.

Notes on speaker connection

• Before connecting the speakers, turn the unit off.

• Use speakers with an impedance of 4 to 8 ohms, and with

adequate power handling capacities to avoid its damage.

• Do not connect the speaker terminals to the car chassis, or connect the terminals of the right speakers with those of the left speaker.

• Do not connect the ground (earth) lead of this unit to the negative (–) terminal of the speaker.

• Do not attempt to connect the speakers in parallel.

• Connect only passive speakers. Connecting active speakers

(with built-in ampliﬁers) to the speaker terminals may damage the unit.

• To avoid a malfunction, do not use the built-in speaker leads installed in your car if the unit shares a common negative (–) lead for the right and left speakers.

• Do not connect the unit’s speaker leads to each other.

Note on connection

If speaker and ampliﬁer are not connected correctly, “FAILURE” appears in the display. In this case, make sure the speaker and ampliﬁer are connected correctly.

Diagrama de conexión

" A AMP REMOTE IN de un ampliﬁcador de

potencia opcional

Esta conexión es sólo para ampliﬁcadores. La conexión de cualquier otro sistema puede dañar la unidad.

Advertencia

Si la antena motorizada no dispone de caja de relé, es posible que la conexión de esta unidad mediante el cable de alimentación suministrado  provoque daños en la antena.

Notas sobre los cables de control y de fuente de alimentación

• El cable de control de la antena motorizada (azul) suministrará cc de +12 V cuando conecte la alimentación del sintonizador.

• Con esta unidad no es posible utilizar una antena motorizada sin caja de relé.

Conexión para protección de la memoria

Si conecta el cable de fuente de alimentación amarillo, el circuito de la memoria recibirá siempre alimentación, aunque apague el interruptor de encendido.

Notas sobre la conexión de los altavoces

• Antes de conectar los altavoces, desconecte la alimentación de la unidad.

• Utilice altavoces con una impedancia de 4 a 8 ? con la capacidad de potencia adecuada para evitar que se dañen.

• No conecte los terminales de altavoz al chasis del automóvil, ni conecte los terminales del altavoz derecho con los del izquierdo.

• No conecte el cable de conexión a masa de esta unidad al terminal negativo (–) del altavoz.

• No intente conectar los altavoces en paralelo.

• Conecte solamente altavoces pasivos. Si conecta altavoces

activos (con ampliﬁcadores incorporados) a los terminales de altavoz, puede dañar la unidad.

• No conecte los cables de altavoz de la unidad entre sí.

Nota sobre la conexión

Si el altavoz y el ampliﬁcador no están conectados correctamente, aparecerá “FAILURE” en la pantalla. Si es así, compruebe la conexión de ambos dispositivos.

CDX-GT48UM/GT480U/GT480US/GT484US

SECTION 3

DISASSEMBLY

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

SET

3-1. SUB PANEL ASSY (Page 9)

3-2. CD MECHANISM BLOCK (Page 9)

3-3. MAIN BOARD (Page 10)

3-4. SERVO BOARD (Page 10)

3-5. CHASSIS (T) SUB ASSY (Page 11)

3-6. ROLLER ARM ASSY (Page 11)

3-7. CHASSIS (OP) ASSY (Page 12)

3-8. CHUCKING ARM SUB ASSY (Page 12)

3-9. SLED MOTOR ASSY (Page 13)

3-10. OPTICAL PICK-UP SECTION (Page 14)

3-11. OPTICAL PICK-UP (Page 14)

CDX-GT48UM/GT480U/GT480US/GT484US

Note: Follow the disassembly procedure in the numerical order shown below.

3-1. SUB PANEL ASSY

two claws

two claws

 two

screws

(+PTT 2.6

3-2. CD MECHANISM BLOCK

CD mechanism block



screw

(+PTT 2.6

 sub panel assy

bracket (CD)



two

screws

(+PTT 2.6

CN701

CN501 (3P)



screw

(+PTT 2.6

CDX-GT48UM/GT480U/GT480US/GT484US

3-3. MAIN BOARD

two (+PTT 2.6

screws

two (+P 2.6

two

screws

(+PTT 2.6

10)

three (+BTT)

screws

insulating sheet



MAIN board

heat sink



screw

(+P 2.6



screw

(+PTT 2.6

10)

3-4. SERVO BOARD

WHT

RED

BLK

WHT

RED

BLK

RED

ORG

BLU YEL

GRY

Remove the eleven solders.

SERVO board

claw

toothed lock screw

(M 1.7 × 2.5)

toothed lock screw (M 1.7 × 2.5)

SERVO board

optical pick-up (16 core)

(CN101)

claw

3-5. CHASSIS (T) SUB ASSY

CDX-GT48UM/GT480U/GT480US/GT484US

two precision (+P 1.7

2.2)

screws

claw

two precision

(+P 1.7

2.2)

chassis (T) sub assy

screws

3-6. ROLLER ARM ASSY

spring (RAL)

roller arm assy

gear (RA1)

washer

spring (RAR)

CDX-GT48UM/GT480U/GT480US/GT484US

3-7. CHASSIS (OP) ASSY



tension spring (KF)

two coil springs (damper) (natural)

slider (R)

 chassis (OP) assy



coil spring (damper) (green)

lever (D)

gear (LE1)

3-8. CHUCKING ARM SUB ASSY

spring

Note: Have this portion receive the chassis.

chucking arm sub assy



Note: Have this portion receive the chassis.

Note: Be careful not to touch the turn table.

+ 28 hidden pages