Sony CDXGT-820-IP Service manual

CDX-GT820IP

SERVICE MANUAL

Ver. 1.0 2007.12

• The tuner and CD sections have no adjustments.

AUDIO POWER SPECIFICATIONS POWER OUTPUT
AND TOTAL HARMONIC DISTORTION

23.2 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 5% total harmonic distortion.

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 – 107.9 MHz

Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Usable sensitivity: 9 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio:

67 dB (stereo), 69 dB (mono)
Harmonic distortion at 1 kHz:

0.5 % (stereo), 0.3 % (mono)

Separation: 35 dB at 1 kHz
Frequency response: 30 – 15,000 Hz

AM

Tuning range:

530 – 1,710 kHz

Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency:

10.7 MHz/450 kHz

Sensitivity:

30 μV

Power amplifi er section

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

SPECIFICATIONS

US Model

Model Name Using Similar Mechanism CDX-GT620IP
CD Drive Mechanism Type MG-101I-188//Q
Optical Pick-up Name DAX-25A

General

Output:

Audio outputs terminal (front/rear)
Subwoofer output terminal (mono)
Power antenna (aerial) relay control terminal
Power amplifi er control terminal

Inputs:

Telephone ATT control terminal
Illumination control terminal
Bus control input terminal
Bus audio input terminal
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
iPod signal input terminal (dock connector)

– Continued on next page –

9-887-935-01

2007L04-1

2007.12

©

FM/AM COMPACT DISC PLAYER

Sony Corporation

Audio Business Group
Published by Sony Techno Create Corporation

CDX-GT820IP

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))
Dimensions: Approx. 178 × 50 × 180 mm
(7 1/8 × 2 × 7 1/8 in) (w/h/d)
Mounting dimensions: Approx. 182 × 53 × 162 mm

1/4 × 2 1/8 × 6 1/2 in) (w/h/d)

(7

Mass: Approx. 1.3 kg (2 lb. 14 oz.)
Supplied accessories:

Card remote commander: RM-X152
Parts for installation and connections (1 set)

MPEG Layer-3 audio coding technology and patents licensed from Fraun­hofer IIS and Thomson.
This product is protected by certain intellectual property rights of Micro­soft Corporation. Use or distribution of such technology outside of this
product is prohibited without a license from Microsoft or an authorized
Microsoft subsidiary.

Design and specifi cations are subject to change
without notice.

SERVICE NOTES

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.

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 radiation 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

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.

2

semi-fixed resistor

CDX-GT820IP

• CD playback

You can play CD-DA (also containing CD TEXT), CD-R/CD­RW (MP3/WMA/AAC fi les).

Type of discs 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 ............................................................... 8

3-2. CD Mechanism Block ..................................................... 8

3-3. Main Board ..................................................................... 9

3-4. Servo Board .................................................................... 9

3-5. Chassis (T) Sub Assy ...................................................... 10

3-6. Roller Arm Assy .............................................................. 10

3-7. Chassis (OP) Assy ........................................................... 11

3-8. Chucking Arm Sub Assy ................................................. 11

3-9. Sled Motor Assy .............................................................. 12

3-10. Optical Pick-up Section .................................................. 13

3-11. Optical Pick-up ............................................................... 13

4. DIAGNOSIS FUNCTION ..................................... 14

5. DIAGRAMS

5-1. Block Diagram –Main Section– ..................................... 17

5-2. Block Diagram –Display Section– ................................. 18

5-3. Printed Wiring Board –Main Section (1/2)– ................... 20

5-4. Printed Wiring Board –Main Section (2/2)– ................... 21

5-5. Schematic Diagram –Main Section (1/4)– ...................... 22

5-6. Schematic Diagram –Main Section (2/4)– ...................... 23

5-7. Schematic Diagram –Main Section (3/4)– ...................... 24

5-8. Schematic Diagram –Main Section (4/4)– ...................... 25

5-9. Printed Wiring Board –Sub Section- .............................. 26

5-10. Schematic Diagram –Sub Section- ................................. 27

5-11. Printed Wiring Boards –Key Section – ........................... 28

5-12. Schematic Diagram –Key Section – ............................... 29

6. EXPLODED VIEWS

6-1. Main Section ................................................................... 36

6-2. Front Panel Section ......................................................... 37

6-3. CD Mechanism Section (MG-101I-188//Q) ................... 38

7. ELECTRICAL PARTS LIST .............................. 39

3

CDX-GT820IP

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 (CN350) and the SERVO board
(CN401) with the extension cable (Part No. J-2502-076-1).

MAIN BOARD
CN350

NOTE FOR REPLACEMENT OF THE SERVO BOARD

When repairing, the complete SERVO board (A-1362-921-A)
should be replaced since any parts in the SERVO board cannot be
repaired.

J-2502-076-1

NOTE FOR THE 24-PIN CONNECTOR (CN901)

Do not use alcohol to clean the 24-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.

SERVO BOARD
CN401

4

• Location of Controls



R

 RER

R

Location of controls and basic operations

Main unit





LIST/

OFF

BROWSE

SEEK SEEK

BACK

Front panel removed

Card remote commander
RM-X152



OFF



SOURCE SOUND

RL

MENU

RM
X

RE

XB

ENTER

DSPL

REP SHUF

132

465

+

–

+

VOL

–

8

SOURCE

MODE

PUSH ENTER/SOUND/MENU

RESET

ATT

MODE

LIST/

CAT

SCRL

PAUSE

SCRL

B



REP SHUF ALBUM

123456

T

This section contains instructions on the location
of controls and basic operation s. For details, see
the respective pages.
For iPod operation, see “iPod” on page 13, or for

XT

optional device (CD/MD changer, etc.)
operation, see “Using optional equipment” on

XE

page 17.
The corresponding buttons on the card remote



commander control the same functions as those
on the unit.

XG

" OFF button

XH

# (LIST/BROWSE) button page 10,

RB
RT

$ Control dial/select button

OPEN

AUX

PAUSE

DSPL

G

RI RKRH

To power off; stop the source.

13

To list up (Radio); enter the Quick-BrowZer
mode (CD/iPod).

Rotate to: Adj ust volume.
Press to: Enter sound setting/apply a menu
setting.
Press and hold to: Enter menu.

SECTION 2

GENERAL

% SOURCE button

To power on; change the source (Radio/CD /

1

iPod/AUX)*

& Display window
' OPEN button page 6, 7
( (BACK) button page 10

) Receptor for the card remote

* SEEK –/+ buttons

+ MODE button page 12, 13

, SCRL (scroll) button

- Number buttons

. DSPL (display) button page 12

/ AUX input jack page 17

0 RESET button page 4
1 ;(eject) button page 7

2 Disc slot page 7

.

Toreturnto the previous display.

commander

CD/iPod:
Toskip tracks (press); skip tracks
continuously (press, then press again within
about 1 second and hold); reverse/fast­forward a track (press and hold).
Radio:
Totune in stations automatically (press); find
a station manually (press and hold).

To s elect the radi o b and (FM/ AM) *
the play mode of iPod.

Toscroll the display item.

CD/iPod:

: REP page 12, 14
: SHUF page 12, 14
/: ALBUM –/+

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

: PAUSE

Topause playback. Tocancel, press
again.

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

To change display items.

To connect a portab le audio device.

To e ject t he di s c.

To insert the disc.

CDX-GT820IP

This section is extracted
from instruction manual.

The following buttons on the card remote
commanderhave also differentbuttons/functions
from the unit. Remove the insulation film before
use (page 5).

S MENU button

To e nter menu.

RM ENTER button

Toapply a setting.

X  ()/ ( ) buttons

Tocontrol CD/radio/iPod, thesame as
4&&, –/+ on the unit.
Setup, sound setting, etc., can be operated by
.

XB VOL (volume) +/– button

To a djust vo lume.

XT ATT (attenuate) button

Toattenuatethe sound. Tocancel, press
again.

XE SOUND button

1

;select

To enter sound setting.

Y LIST/CAT*

To list up (Radio); enter theQuick-BrowZer
mode (CD/iPod).

XH . (+)/N (–) buttons

Tocontrol CD/iPod, the same as /
(ALBUM –/+) on the unit.
Setup,soundsetting, etc., can be operated by
.N.

*1 In the case of a CD/MD changer, HD radio tuner or

SATtuner being connected; when 4063$& is
pressed, the connected device (“MD,” “HD,”“XM” or
“SR”) will appear in the display, depending on
which device is connected. Furthermore, if
.0%& is pressed, you can switch the changer,
HD radio tuner band or SAT tuner band.

*2 When the SAT tuner is connected.

Note

If the unit isturned off and the display disappears,it
cannot be operated with the card remote commander
unless4063$& on the unit is pressed, or a disc is
inserted to activate the unit first.

2

button

9

5

CDX-GT820IP

• Connections

2

1

*

*

Source selector

(not supplied)

Sélecteur de source

(non fourni)

XA-C40

Supplied with the CD/MD changer
Fourni avec le changeur de CD/MD

1

*

SUB OUT (MONO)

from car antenna (aerial)
à partir de l’antenne de la voiture

AMP REM



Max. supply current 0.3 A
Courant max. fourni 0,3 A

Left
Gauche

Right
Droit

Left
Gauche

Right
Droit

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

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 interface cable of a car telephone
 To a car’s illumination signal

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

 To the +12V power terminal which is

energized in the accessory position of the
ignition 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 +12V 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.

Notes on connection

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

• An another iPod cannot be connected using the interface
adapter for iPod XA-110IP/XA-120IP.

BUS AUDIO IN

L

R

REAR

FRONT

BUS

AUDIO

OUT

IN

REAR

AUDIO OUT

Blue/white striped
Rayé bleu/blanc

White
Blanc

White/black striped
Rayé blanc/noir

Gray
Gris

Gray/black striped
Rayé gris/noir

Green
Vert

Green/black striped
Rayé vert/noir

Purple
Mauve

Purple/black striped
Rayé mauve/noir

Fuse (10 A)
Fusible (10 A)



Schéma de raccordement

 Vers un point métallique de la voiture

Branchez d’abord le câble de mise à la masse noir et,
ensuite, les câbles d’alimentation jaune et rouge.

 Vers le câble de commande d’antenne

électrique ou vers le câble d’alimentation de
l’amplificateur d’antenne

Remarques

• Il n’est pas nécessaire de raccorder ce câble s’il n’y a pas
d’antenne électrique ni d’amplificateur d’antenne, ou avec
une antenne télescopique manuelle.

• Si votrevoiture est équipée d’une antenne FM/AM
intégrée dans la vitre arrière/latérale, voir « Remarques
sur les câbles de commande et d’alimentation ».

 Vers AMP REMOTE IN de l’amplificateur de

puissance en option

Ce raccordement s’applique uniquement aux amplificateurs.
Le branchement de tout autre système risque
d’endommager l’appareil.

 Vers le cordon de liaison d’un téléphone de

voiture

 Vers le connecteur du signal d’éclairage de

la voiture

Raccordez d’abord le câble de mise à la masse noir à un
point métallique du véhicule.

 Vers la borne d’alimentation +12V qui est

alimentée quand la clé de contact est sur la
position accessoires

Remarques

• S’il n’y a pas de position accessoires, raccordez la borne
d’alimentation (batterie) +12 V qui est alimentée en
permanence.
Raccordez d’abord le câble de mise à la masse noir à un
point métallique du véhicule.

• Si votrevoiture est équipée d’une antenne FM/AM
intégrée dans la vitre arrière/latérale, voir « Remarques
sur les câbles de commande et d’alimentation ».

 Vers la borne d’alimentation +12V qui est

alimentée en permanence

Raccordez d’abord le câble de mise à la masse noir à un
point métallique du véhicule.

Remarques sur les câbles de commande et d’alimentation

• Le câble de commande d’antenne électrique (bleu) fournit une
alimentation de + 12 V CC lorsque vous mettez la radio sous
tension.

• Lorsque votrevoiture est équipée d’une antenne FM/
AM intégrée dans la vitre arrière/latérale, raccordez le
câble de commande d’antenne électrique (bleu) ou le
câble d’alimentation des accessoires (rouge) à la borne
d’alimentation de l’amplificateur d’antenne existant.Pour plus
de détails, consultez votre détaillant.

• Une antenne électrique sans boîtier de relais ne peut pas être
utilisée avec cet appareil.

Raccordement pour la conservation de la mémoire

Lorsque le câble d’alimentation jaune est raccordé, le circuit
de la mémoire est alimenté en permanence même si la clé de
contact est sur la position d’arrêt.

Remarques sur le raccordement des haut-parleurs

• Avant de raccorder les haut-parleurs, mettez l’appareil hors
tension.

• Utilisez des haut-parleurs ayant une impédance de 4 à 8 ohms
avec une capacité électrique adéquate pour éviter de les
endommager.

• Ne raccordez pas les bornes du système de haut-parleurs au
châssis de la voiture et ne raccordez pas les bornes du haut­parleur droit à celles du haut-parleur gauche.

• Ne raccordez pas le câble de mise à la masse de cet appareil
à la borne négative (–) du haut-parleur.

• N’essayez pas de raccorder les haut-parleurs en parallèle.

• Raccordez uniquement des haut-parleurs passifs. Le

raccordement de haut-parleurs actifs (avec amplificateurs
intégrés) aux bornes des haut-parleurs peut endommager
l’appareil.

• Pour éviter tout problème de fonctionnement, n’utilisez pas les
câbles des haut-parleurs intégrés installés dans votre voiture si
l’appareil possède un câble négatif commun (–) pour les haut­parleurs droit et gauche.

• Ne raccordez pas entre eux les cordons des haut-parleurs de
l’appareil.

Remarques sur le raccordement

• Si les haut-parleurs et l’amplificateur ne sont pas raccordés
correctement, le message « FAILURE » s’affiche. Dans ce cas,
assurez-vous que les haut-parleurs et l’amplificateur sont bien
raccordés.

• Il est impossible de raccorder un autre iPod à l’aide de
l’adaptateur d’interface pour iPod XA-110IP/XA120IP.

FRONT

AUDIO OUT

REMOTE

IN

CONTROL IN

Black
Noir

Blue
Bleu

Light blue
Bleu ciel

Orange/white striped
Rayé orange/blanc

Red
Rouge

Yellow
Jaune

BUS

3

*

Max. supply current 0.1 A
Courant max. fourni 0,1 A

ANT REM

ATT

ILLUMINATION













1

RCA pin cord (not supplied)

*

2

*

Supplied with XA-C40

3

*

Insert with the cord upwards.

1

Cordon à broche RCA (non

*

fourni)

2

*

Fourni avec le XA-C40

3

*

Insérez avec le câble vers le bas.

6

DISASSEMBLY

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

SET

3-1. SUB PANEL ASSY
(Page 8)

3-2. CD MECHANISM BLOCK
(Page 8)

CDX-GT820IP

SECTION 3

3-3. MAIN BOARD
(Page 9)

3-4. SERVO BOARD
(Page 9)

3-5. CHASSIS (T) SUB ASSY
(Page 10)

3-6. ROLLER ARM ASSY
(Page 10)

3-7. CHASSIS (OP) ASSY
(Page 11)

3-8. CHUCKING ARM SUB ASSY
(Page 11)

3-9. SLED MOTOR ASSY
(Page 12)

3-10. OPTICAL PICK-UP SECTION
(Page 13)

3-11. OPTICAL PICK-UP
(Page 13)

7

CDX-GT820IP

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 × 6)

3-2. CD MECHANISM BLOCK

CD mechanism block

screw

(+PTT 2.6 × 6)

flexible flat cable (23 core)
(CN370)

 sub panel assy

bracket (CD)

two screws

(+PTT 2.6 × 4)



CN350

screw

(+PTT 2.6 × 6)

8

3-3. MAIN BOARD

RBscrew
(+PTT 2.6 × 10)

three ground point screws
(+PTT 2.6 × 6)

 CN250 (8P)

 CN200 (3P)



insulating sheet

 automobile cord (for iPod)

screw

(+PTT 2.6 × 8)

RTtwo screws
(+P 2.6 × 8)

REtwo screws
(+PTT 2.6 × 10)

RHscrew
(+PTT 2.6 × 10)

RIheat sink

 CN410 (3P)

RKMAIN board

CDX-GT820IP

screw
(+PTT 2.6 × 8)

connection
cord (RCA)

two screws
(+PTT 2.6 × 8)

RGtwo screws
(+P 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)

(CN111)

claw

9

CDX-GT820IP

3-5. CHASSIS (T) SUB ASSY

two precision screws
(+P 1.7 × 2.2)

two precision screws
(+P 1.7 × 2.2)

chassis (T) sub assy

claw

3-6. ROLLER ARM ASSY

spring (RAL)

roller arm assy

gear (RA1)

washer

spring (RAR)

10

3-7. CHASSIS (OP) ASSY



coil spring (damper) (natural)

CDX-GT820IP

 chassis (OP) assy

tension spring (KF)



coil spring (damper) (green)

slider (R)

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.

11

CDX-GT820IP

3-9. SLED MOTOR ASSY

turn table

three serration screws
(M 2 × 3)

sled mtor assy

spring

spring

stand

Note:
Never remove these parts since they were adjusted.

stand

Note: Place the stand with care not to touch the turn table.

Note for Assembly

three serration screws
(M 2 × 3)

sled mtor assy

Note: Take care to prevent the chassis from being bent
when tightening the three machine screws.

12

3-10. OPTICAL PICK-UP SECTION

optical pick-up section



CDX-GT820IP

Note: Be careful not to touch the lens and hologram
terminal when removing the optical pick-up section.

3-11. OPTICAL PICK-UP

leaf spring (sub guide)

optical pick-up

Notes for Assembly

pan tapping screw
(M 1.4 × 2.5)

leaf spring (OP)

lead screw assy

Prevent the end of the
leaf spring (sub guide) from being
in contact with the OP slide base.

Prevent the end of the
leaf spring (sub guide) from being
in contact with the OP slide base.

There is space at the end of the
leaf spring (sub guide) to avoid
contact with the slide.

13

CDX-GT820IP

SECTION 4

DIAGNOSIS FUNCTION

Description of the Diagnostics function:

1. Setting the Diag display mode

With the power off, press the [4/ALBUM +] button, [5] button,

and [4/ALBUM +] button on the set body or the remote control
(for more than 2 seconds) in turn.

2. Canceling the Diag display mode

During the Diag function mode, press the [OFF] button.

3. Initial display in the Diag display mode.

Just when the Diag mode is entered, “reset count” is displayed.
The display mode is switched by each rotation of [

SEEK+] or [

. m/

Reset count display

Reset count by watchdog timer display

Number of connected units display

Operating hours display

01

02

03

SEEK–] keys.

1

XX

XX

XXX

M >/

4. Contents of each display mode

4-1. Reset count display mode

01

Diag code
01: Reset count

4-2. Reset count by watchdog timer display mode

XX

Reset count
(in hexadecimal format)

02 XX

Reset count
(in hexadecimal format)

Diag cord
02: Number of resets by watchdog timer

4-3. Number of connected units display mode

03

Diag code
03: Number of connected unit

1

Recency of information
1 - 3: 1 represents the latest.

XXX

Show the number of connected units for
CD-C, MD-C and XM respectively from
the rightmost (in hexadecimal format).

04

CD error information display

05

OFFSET/FAILURE error display

06

1

1

XXXX

XX

XXXXX

The display mode is switched by each rotation of [4/ALBUM +] or
[3/ALBUM –] keys during the number of connected units display
mode.

No. of connected units history 1 (latest) display

03

No. of connected units history 2 display

03

No. of connected units history 3 display

03

4-4. Operating hours display mode

04

XXXX

1

2

3

XXX

XXX

XXX

14

Operating hours
(in hexadecimal format)

Diag code
04: Operating hours

CDX-GT820IP

4-5. CD error information display mode
4-5-1. Error description

05

Diag code
05: CD error information

4-5-2. Operating hours

05

Diag code
05: CD error information

The display mode is switched by each rotation of [4/ALBUM +]
or [3/ALBUM –] keys during the CD error information display
mode.

1

Recency of information
1 - 3: 1 represents the latest.

1 XXXXX

Recency of information
1 - 3: 1 represents the latest.

XX

Error description
(in hexadecimal
format)

Operating hours

Disc type

Error information

Indication

1X
3X
4X
5X
FX

Disc type

Indication

0
1
2
3
8
F

Description
SERVO ERROR
LOADING ERROR
TRACK JUMP
TEXT ERROR
MECHA ERROR

Disc type
MP3
WMA
AAC
ATRAC
CD-DA
UNKNOWN

4-6. OFFSET/FAILURE error display mode

06

Diag code
06: OFFSET/FAILURE

The display mode is switched by each rotation of [4/ALBUM +] or
[3/ALBUM –] keys during the OFFSET/F
mode.

1 XXXXX

Operating hours

Error description
(0: OFFSET, 1: FAILURE)

Recency of information
1 - 3: 1 represents the latest.

AILURE error display

OFFSET/FAILURE error history 1 (latest) display

XXXXX

06

OFFSET/FAILURE error history 2 display

06

OFFSET/FAILURE error history 3 display

1

2

XXXXX

CD error info history 1 (latest)
Error description plus error details display

05

CD error info history 1 (latest)
Disc type plus operating hours display

05

CD error info history 2
Error description plus error details display

05

CD error info history 2
Disc type plus operating hours display

05

CD error info history 3
Error description plus error details display

1

1

2

2

XX

XXXXX

XX

XXXXX

06

3

XXXXX

05

CD error info history 3
Disc type plus operating hours display

05

3

3

XX

XXXXX

15