JVC EXAD KD-NX901 Bedienungsanleitung

SERVICE MANUAL

2005/6

HDD NAVIGATION / DVD RECEIVER

MA16120056

KD-NX901

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Area suffix

E ------------- Southern Europe

1-2 (No.MA161)

SPECIFICATION

NAVIGATION SYSTEM

System & Service L1, C/A code

Global Positioning System

Standard Positioning Service

Reception System 15-channel multi-channel reception system

Reception Frequency 1 575.42 MHz

Sensitivity -130 dBm

Update Rate 1/second, continuous

GPS Antenna Polarization Right Handed Circular Polarization

Dimensions (approx.) 30.4 mm ×11.7 mm ×35.5 mm (W ×H ×D)

Cable (approx.) 5.0 m

Attachment mat size (approx.) 70 mm ×70 mm

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Rear 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Load Impedance 4 Ω(4 Ωto 8 Ωallowance)

Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz, 12 kHz

Level ±10 dB

Signal-to-Noise Ratio 70 dB

Audio output level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm

Output level: -21 dBm to -15 dBm

Line-Out Level/Impedance 2.0 V/20 kΩload (full scale) Output Impedance: 1 kΩ

Color system PAL

Video output (composite) 1 Vp-p/75 Ω

Other Terminals SUBWOOFER OUT,CD changer

Steering wheel remote input

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 40 dB

Capture Ratio 1.5 dB

MW Tuner Sensitivity 20 µV

Selectivity 65 dB

LW Tuner Sensitivity 50 µV

(No.MA161)1-3

Design and specifications are subject to change without notice.

DVD/CD PLAYER SECTION

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 20 000 Hz

VCD/CD 16 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 (MPEG Audio Layer 3) Max. Bit Rate 320 Kbps

WMA (Windows Media Audio) Max. Bit Rate 192 Kbps

HDD/SD SECTION

MP3 (MPEG Audio Layer 3) Max. Bit Rate 320 kbps

WMA (Windows Media Audio) Max. Bit Rate 192 kbps

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Allowable Operating Altitude -300 m to +3000 m

Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×159 mm

Panel Size (approx.) 188 mm ×58 mm ×13 mm

Mass (approx.) 2.1 kg (excluding accessories)

1-4 (No.MA161)

SECTION 1

PRECAUTIONS

1.1 Safety Precautions

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

!Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

(No.MA161)1-5

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser

diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.

Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the

traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical

pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily

destroy the laser diode.

1.3 Handling the traverse unit (optical pickup)

(1) Before disconnecting the flexible wire from the connector CN101 on the mechanism control board, solder the short-circuit points

on the flexible wire.

Caution:

If you do not follow this instruction, the DVD pickup may be damaged.

(2) Disconnect the flexible wire from the connector CN101 on the mechanism control board.

(3) Remove the solders from the short-circuit points on the flexible wire after replacing the DVD pickup.

(4) Connect the flexible wire to the connector CN101 on the mechanism control board.

(caption)

Anti-static wrist strap

Conductive material

(conductive sheet) or iron plate

Mechanism control board

CN101

Flexible wire

Short-circuit points

1-6 (No.MA161)

1.4 Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4.CAUTION : The CD,MD and DVD player uses invisible

laser radiation and is equipped with safety switches which

prevent emission of radiation when the drawer is open and

the safety interlocks have failed or are defeated. It is

dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified here in may result in

hazardous radiation exposure.

REPRODUCTION AND POSITION OF LABELS

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

WARNING LABEL

CAUTION : Visible and Invisible

laser radiation when open and

interlock failed or defeated.

AVOID DIRECT EXPOSURE TO

BEAM. (e)

VARNING : Synlig och

osynling laserstrålning när

den öppnas och spärren är

urkopplad. Betrakta ej

strålen. (s)

VARO : Avattaessa ja suojalukitus

ohitettuna tai viallisena olet alttiina

näkyvälle ja näkymättömälle

lasersäteilylle. Vältä säteen

kohdistumista suoraan itseesi. (f)

ADVARSEL : Synlig og usynlig

laserstråling når maskinen er

åben eller interlocken fejeler.

Undgå direkte eksponering til

stråling. (d)

CLASS 1

LASER PRODUCT

(No.MA161)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MA161)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly

(See Fig1)

(1) Push the detach button in the lower right part of the front

panel assembly.

(2) Remove the front panel assembly.

Fig.1

3.1.2 Removing the heat sink

(See Fig.2)

(1) From the left side of the main body, remove the two screws

Aand three screws Battaching the heat sink.

Fig.2

Front panel assembly

Detach button

Heat sink

AAB

(No.MA161)1-9

3.1.3 Removing the top chassis assembly

(See Figs.3 to 6)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink.

Reference:

Remove the front panel assembly as required.

(1) From the bottom side of the main body, remove the two

screws Cand screw Dattaching the top chassis assembly

to the bottom chassis assembly. (See Fig.3)

(2) From the both and rear sides of the main body, remove the

six screws Eattaching the top chassis assembly to the bot-

tom chassis assembly. (See Figs.4 to 6)

(3) Lift the top chassis assembly in the direction of the arrow,

and disconnect top chassis assembly from the connector

CN601 on the main board. (See Figs.3 and 6)

(4) Take out the top chassis assembly from the bottom chassis

assembly.

Fig.3

Fig.4

Fig.5

Fig.6

Bottom chassis assembly

CN601

Bottom chassis assembly

Top chassis assembly

Bottom chassis assembly

Main board

Top chassis assembly

Bottom chassis assembly

Rear bracket

1-10 (No.MA161)

3.1.4 Removing the front chassis assembly

(See Figs.7 to 9)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink and top chassis assembly.

(1) From the both sides of the top chassis assembly, remove

the two screws Fattaching the front chassis assembly.

(See Figs.7 and 8)

(2) From the front sides of the top chassis assembly, remove

the three screws Gattaching the front chassis assembly.

(See Fig.9)

(3) Take out the front chassis assembly from the top chassis.

Fig.7

Fig.8

Fig.9

Top chassis assembly

Front chassis

Top chassis assembly

Front chassis

Front chassis assembly

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