JVC KDNX-901 Service manual

SERVICE MANUAL

HDD NAVIGATION / DVD RECEIVER

MA16120056

KD-NX901

Area suffix

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

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

No.MA161

2005/6

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 Ω to 8 Ω allowance)

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 kΩ load (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

1-2 (No.MA161)

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)

Design and specifications are subject to change without notice.

(No.MA161)1-3

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.

3.1.2 Removing the heat sink (See Fig.2)

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

A and three screws B attaching the heat sink.

Front panel assembly

Detach button

Fig.1

AAB

Heat sink

Fig.2

1-8 (No.MA161)

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 C and screw D attaching 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 E attaching the top chassis assembly to the bottom 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

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

CN601

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

assembly.

Bottom chassis assembly

CN601

Fig.3

Top chassis assembly

Bottom chassis assembly

Top chassis assembly

Main board

Top chassis assembly

Bottom chassis assembly

Fig.4

Fig.5

Rear bracket

Fig.6

(No.MA161)1-9

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 F attaching the front chassis assembly. (See Figs.7 and 8)

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

the three screws G attaching the front chassis assembly. (See Fig.9)

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

Top chassis assembly

Front chassis

Fig.7

Top chassis assembly

Front chassis

Fig.8

Front chassis assembly

Fig.9

1-10 (No.MA161)

3.1.5 Removing the CPU board

(See Figs.10 and 11)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink and top chassis assembly. (1) From the inside of the top chassis assembly, remove the

four screws H attaching the CPU case (bottom). (See Fig.10)

(2) Release the lock of the connector CN561

board, disconnect the card wire from the connector CN561 (See Fig.11)

(3) Release the lock of the connector CN531

board, disconnect the card wire from the connector CN531 (See Fig.11)

(4) Take out the CPU board from the top chassis assembly.

on the CPU

CPU case(botom)

Fig.10

CN531

CN561

CPU board

Fig.11

(No.MA161)1-11

3.1.6 Removing the HDD (See Fig.12)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink and top chassis assembly. (1) From the inside of the top chassis assembly, remove the

four screws J attaching the HDD.

(2) Release the lock of the connector CN562

connect the card wire from the connector CN562.

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

3.1.7 Removing the DVD (See Fig.13)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink, front chassis assembly and top chassis assembly. (1) From the inside of the top chassis assembly, remove the

three screws K attaching the DVD.

(2) Take out the DVD from the top chassis assembly.

on the HDD, dis-

CN562

HDD

Fig.12

1-12 (No.MA161)

DVD

Fig.13

3.1.8 Removing the main board

(See Figs.14 and 15)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink and top chassis assembly. (1) From the rear side of the bottom chassis assembly, remove

the screws M and N attaching the rear bracket to the bottom chassis assembly. (See Fig.14)

(2) From the top side of the bottom chassis assembly, remove

the four screws P attaching the main board to the bottom chassis assembly. (See Fig.15)

(3) Release the stopper of the connector CN751

board in an upward direction, disconnect the card wire from the connector CN751

(4) Disconnect the wire from the connectors CN391 and

on the main board. (See Fig.15)

CN705

Reference:

After connecting the wires, fix the wires with the wire holder.

(5) Take out the main board from the bottom chassis assem-

bly.

. (See Fig.15)

on the main

Wire holder

CN391

CN705

Rear bracket

Fig.14

CN751

Main board

Fig.15

(No.MA161)1-13

3.1.9 Removing the rear bracket (See Figs.16 and 17)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink, top chassis assembly and main board. (1) Remove the two screws Q attaching the wire holder to the

rear bracket. (Figs.16)

(2) From the rear side of the main board, remove the wires

from the rear bracket in the direction of the arrow. (See Fig.17)

(3) Remove the two screws R and screws S and U attaching

the rear bracket to the main board. (Figs.17)

(4) Remove the nut T attaching the GPS antenna terminal.

(See Fig.17)

(5) Disconnect the wire from the connector CN381

board. (See Fig.16)

(6) Take out the main board from the bottom chassis assem-

bly.

on the main

Main board

R T

Wire holder

Wire

Rear bracket

Fig.16

Fig.17

CN381

1-14 (No.MA161)

3.1.10 Removing the gear bracket unit

(See Fig.18)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink, top chassis assembly and main board. (1) From the top side of the bottom chassis assembly, remove

the screw V attaching the FPC guide.

(2) Remove the five screws W attaching the gear bracket unit

to the bottom chassis.

Reference:

When attaching the screws V and W, apply a locking agent them.

(3) Take out the gear bracket unit from the bottom chassis.

Bottom chassis Gear bracket unit

FPC guide

Fig.18

(No.MA161)1-15

3.1.11 Removing the switch board (See Figs.19 to 21)

• Prior to performing the following procedure, remove the front

panel assembly. (1) From the rear side of the front panel assembly, remove the

five screws X attaching the rear cover assembly to the front panel assembly. (See Fig.19)

(2) Release the eight joints a of the front panel assembly and

remove the rear cover assembly. (See Fig.20)

(3) Take out the switch board from the front panel assembly.

(See Fig.21)

Caution:

Take care not to lose the spring.

Rear cover assembly

Fig.19

Joints a

Front panel assembly

Comp. spring

Rear cover assembly

Fig.20

Switch board

Fig.21

Joints a

1-16 (No.MA161)

3.2 DVD mechanism assembly

3.2.1 Removing the chassis assembly

(See Fig.1)

(1) Remove the screw A attaching the lug wire. (2) Remove the six screws B attaching the chassis assembly. (3) Remove the chassis assembly.

Chassis assembly

3.2.2 Removing the mechanism control board

(See Fig.2)

Caution:

Before disconnecting the flexible wire extending from the DVD pickup, solder the short-circuit point on the flexible wire using a grounding soldering iron. If you do not follow this instruction, the DVD pickup may be damaged. (1) Turn over the body, and solder the short-circuit points on

the flexible wire extending from the DVD pickup.

(2) Disconnect the flexible wire from connector CN101

mechanism control board.

(3) Disconnect the card wire from connector CN201

mechanism control board.

(4) Disconnect the flexible wire from connector CN202

mechanism control board.

(5) Unsolder two soldered points a on the mechanism control

board and remove the wire extending from the feed motor.

(6) Remove the two screws C and screw D attaching the

mechanism control board.

Caution:

• As the flexible wire to be connected to CN101 attach it to the mechanism control board using a double tape.

• After reassembling, unsolder the short-circuit points.

on the

, make sure to

Flexible wire

Double tape

CN101

Short-circuit points

Fig.1

Feed motor

CN401CN201

CN202

Mechanism control board

Fig.2

(No.MA161)1-17

3.2.3 Removing the top cover (See Fig.3)

(1) Remove the two screws E attaching the top cover on the

back of the body.

(2) Remove the top cover upward.

Reference:

When reassembling, set part b of the top cover under the bending part c of the chassis frame.

3.2.4 Removing the mechanism section (See Figs.3 to 5)

• Remove the top cover.

(1) From the bottom of the body, remove the screw E attaching

the lug wire. (See Fig.3)

(2) Remove the two screws F attaching the right and left stop-

pers on the front side. (See Fig.3)

(3) Remove the two floating springs on the bottom of the body.

(See Fig.4)

(4) Move the mechanism section upward and remove from the

chassis frame. The three damper springs come off from the dampers. (See Fig.5)

Caution:

• When reassembling, reattach the damper spring to the damper respectively and insert the three shafts on the bottom of the mechanism to the dampers.

• Before inserting the shaft to the dampers, apply IPA to the hole of damper.

Floating spring

Fig.4

Mechanism section

Stopper

Top cover

Stopper

Fig.3

Damper SP.(F)

(Silver)

Damper (F) (Black)

Damper SP.(F)

(Silver)

Damper (F) (Black)

Fig.5

Damper SP.(R)

(Red)

Damper (R) (Purple)

Chassis frame

1-18 (No.MA161)

3.2.5 Removing the clamper unit (See Figs. 6 to 10)

• Remove the top cover and the mechanism section.

(1) Remove the clamper2 spring on the bottom of the mecha-

nism section. (See Figs.6.and 10)

(2) Release the part d of the clamper spring from the bending

part of the chassis base assembly. (See Fig.8)

(3) Move the clamper unit in the direction of the arrow and turn.

Release the two joints e and f, then remove the clamper unit upward. (See Fig.6)

Clamper unit

3.2.6 Reattaching the clamper unit (See Figs. 6 to 10)

(1) Attach the clamper spring to the clamper unit. (See Fig.9) (2) Move the clamper unit to set the side joints e and f to each

boss of the chassis base assembly. Make sure that part g is inserted to the notch of the chassis base assembly. (See Figs.6 and 10)

(3) Move the part d of the clamper spring to the outside of the

bending part of the chassis base assembly. (See Fig.8)

(4) Attach the clamper2 spring to the chassis base assembly.

(See Figs.6 and 7)

Caution:

When reattaching, temporarily hook the end of the clamper spring as shown in the figure to make the work easy. (See Fig.9)

Clamper spring

Clamper2 spring

Chassis base assembly

Clamper2 spring

Fig.6

Chassis base assembly

Fig.7

(No.MA161)1-19

Clamper spring

Chassis base assembly

Clamper unit

Fig.8

Fig.9

Clamper spring

Fig.10

Notch

1-20 (No.MA161)

3.2.7 Removing the front unit (See Figs.11 to 13)

• Remove the top cover and the mechanism section.

(1) Disconnect the flexible wire from connector CN202

mechanism control board at the bottom of the body. (See Fig.11)

(2) Remove the screw G attaching the front unit on the top of

the body. (See Fig.12)

(3) Move the front unit toward the front to release joint h, and

release two joints j and k on the right side of the chassis base assembly. Then remove the front unit upward. (See Figs.12 and 13)

(4) Remove the two screws H attaching the switch board. (See

Fig.13)

Reference:

You can remove the switch board only without removing the front unit.

Caution:

When reassembling, attach the flexible wire extending from the switch board using the double tape. (See Figs.11 and 13)

Mechanism control board

on the

Front unit

Fig.12

CN202

Double tape

Fig.11

Flexible wire

Double tape

Switch board

Front unit

Fig.13

(No.MA161)1-21

3.2.8 Removing the loading arm assembly (See Figs.14 and 15)

• Remove the top cover, the mechanism section and the front

unit. (1) From the top of the body, move the loading arm assembly

from the front side upward, and release the bosses from the right and left joints m and n of the chassis base assembly.

(2) Release the boss from notch p of the connect arm on the

right side of the body, and release the boss from notch q of the slide cam assembly on the left side.

Loading arm assembly

Side cam assembly

Fig.14

Loading arm assembly

Connect arm

1-22 (No.MA161)

Fig.15

3.2.9 Removing the rod (L)(R) and roller assembly

(See Figs.16 and 17)

• Remove the top cover, the mechanism section, the front unit

and the loading arm assembly. (1) Release the rod (L) and (R) from the joints r at the bottom

of the loading arm assembly (See Fig.16)

(2) Remove the roller assembly from the loading arm assem-

bly. (See Fig.17)

(3) Remove the two collars and washer from the roller assem-

bly. (See Fig.17)

Caution:

After attaching the loading arm assembly to the roller assembly, attach the rod (L) and (R). Attach the rods to the right and left collars of the roller. (See Fig.16) When reattaching the rod (L) and (R) to the loading arm assembly, engage each joint as shown in Fig.15. As joints r of the rod (L), let the rod through r before reattaching it.

Collar

Rod(R) Rod(L)

Collar

Rod(L)

Rod(R)

Loading arm assembly

Fig.16

Roller assembly

Loading arm assembly

Rod(L)

Collar

Washer

Rod(R)

Fig.17

(No.MA161)1-23

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