Jvc Kw-r900btj User manual

SERVICE MANUAL

2012/1

CD RECEIVER

MA520<Rev.001>20121SERVICE MANUAL

KW-R900BTJ, KW-R900BTU

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

Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)

For us

(No.MA520<Rev.001>)2/16

SPECIFICATION

For US

• Subject to change without notice.

• If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop.

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS x 4 Channels at 4 Ωand ≤1% THD+N

Load Impedance 4 Ω(4 Ωto 8 Ωallowance)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4Ω)

Line-Out or Subwoofer-Out Level/Impedance 5 V/20 kΩload (full scale)

Output Impedance ≤600Ω

TUNER SECTION

FM Frequency Range 200 kHz step: 87.9 MHz to 107.9 MHz

50 kHz step: 87.5 MHz to 108.0 MHz

Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)

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

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 40 dB

AM Frequency Range 10 kHz step: 530 kHz to 1 700 kHz

9 kHz step: 531 kHz to 1 611 kHz

Sensitivity/Selectivity 20 µV/40 dB

CD PLAYER SECTION

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

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Signal-to-Noise Ratio 102 dB

Wow and Flutter Less than measurable limit

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Compatible Device Mass storage class

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA/WAV

Maximum Supply Current DC 5 V 1 A

BLUETOOTH SECTION

Version Bluetooth 2.1 certified (+EDR)

Power Class Class 2 Radio

Service Area 10 m (10.9 yd)

Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0

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 (32°F to 104°F)

Dimensions (W ×H ×D)

(approx)

Installation Size 182 mm ×111 mm ×160 mm (7-3/16” ×4-3/8” ×6-5/16”)

Panel Size 188 mm ×117 mm ×18 mm (7-7/16” ×4-5/8” ×3/4”)

Mass 1.8 kg (4 lbs) (excluding accessories)

(No.MA520<Rev.001>)3/16

SPECIFICATION

For ASIA

• Subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output 50 W per channel

Continuous Power Output (RMS) 20 W per channel into 4Ω, 40 Hz to 20 000 Hz at less than 1% total harmonic distortion.

Load Impedance 4 Ω(4 Ωto 8 Ωallowance)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 80 dB

Line-Out or Subwoofer-Out Level/Impedance 5 V/20 kΩload (full scale)

Output Impedance ≤600Ω

TUNER SECTION

FM Frequency Range 87.5 MHz to 108.0 MHz

Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)

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

Alternate Channel Selectivity

(400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 40 dB

AM Frequency Range 531 kHz to 1 611 kHz

Sensitivity/Selectivity 20 µV/40 dB

CD PLAYER SECTION

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

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Signal-to-Noise Ratio 102 dB

Wow and Flutter Less than measurable limit

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Compatible Device Mass storage class

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA/WAV

Maximum Supply Current DC 5 V 1 A

BLUETOOTH SECTION

Version Bluetooth 2.1 certified (+EDR)

Power Class Class 2 Radio

Service Area 10 m

Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0

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

Dimensions

(W ×H ×D)

Installation Size approx. 178 mm ×100 mm ×156 mm

Panel Size approx. 184 mm ×112 mm ×22 mm

Mass 1.5 kg (excluding accessories)

(No.MA520<Rev.001>)4/16

SECTION 1

PRECAUTION

1.1 Safety Precautions

(1) This design of this product contains special hardware and

many circuits and components specially for safety purpos-

es. For continued protection, no changes should be made

to the original design unless authorized in writing by the

manufacturer. Replacement parts must be identical to

those used in the original circuits. Services should be per-

formed by qualified personnel only.

(2) Alterations of the design or circuitry of the product should

not be made. Any design alterations of the product should

not be made. Any design alterations or additions will void

the manufacturers warranty and will further relieve the

manufacture of responsibility for personal injury or property

damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteris-

tics are often not evident from visual inspection nor can the

protection afforded by them necessarily be obtained by us-

ing replacement components rated for higher voltage, watt-

age, etc. Replacement parts which have these special

safety characteristics are identified in the Parts List of Ser-

vice Manual. Electrical components having such features

are identified by shading on the schematics and by ( ) on

the Parts List in the Service Manual. The use of a substitute

replacement which does not have the same safety charac-

teristics as the recommended replacement parts shown in

the Parts List of Service Manual may create shock, fire, or

other hazards.

(4) The leads in the products are routed and dressed with ties,

clamps, tubings, barriers and the like to be separated from

live parts, high temperature parts, moving parts and/or

sharp edges for the prevention of electric shock and fire

hazard. When service is required, the original lead routing

and dress should be observed, and it should be confirmed

that they have been returned to normal, after reassem-

bling.

(5) Leakage shock hazard testing

After reassembling the product, always perform an isola-

tion check on the exposed metal parts of the product (an-

tenna terminals, knobs, metal cabinet, screw heads,

headphone jack, control shafts, etc.) to be sure the product

is safe to operate without danger of electrical shock.Do not

use a line isolation transformer during this check.

• Plug the AC line cord directly into the AC outlet. Using a

"Leakage Current Tester", measure the leakage current

from each exposed metal parts of the cabinet, particular-

ly any exposed metal part having a return path to the

chassis, to a known good earth ground. Any leakage cur-

rent must not exceed 0.5mA AC (r.m.s.).

• Alternate check method

Plug the AC line cord directly into the AC outlet. Use an

AC voltmeter having, 1,000Ωper volt or more sensitivity

in the following manner. Connect a 1,500Ω10W resistor

paralleled by a 0.15µF AC-type capacitor between an ex-

posed metal part and a known good earth ground.

Measure the AC voltage across the resistor with the AC

voltmeter.

Move the resistor connection to each exposed metal

part, particularly any exposed metal part having a return

path to the chassis, and measure the AC voltage across

the resistor. Now, reverse the plug in the AC outlet and

repeat each measurement. Voltage measured any must

not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5

mA AC (r.m.s.).

1.2 Warning

(1) This equipment has been designed and manufactured to

meet international safety standards.

(2) It is the legal responsibility of the repairer to ensure that

these safety standards are maintained.

(3) Repairs must be made in accordance with the relevant

safety standards.

(4) It is essential that safety critical components are replaced

by approved parts.

(5) If mains voltage selector is provided, check setting for local

voltage.

1.3 Caution

Burrs formed during molding may be left over on some parts

of the chassis.

Therefore, pay attention to such burrs in the case of pre-

forming repair of this system.

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen

printed side (parts side) of the PWB diagrams, the parts that are

printed over with black such as the resistor ( ), diode ( )

and ICP ( ) or identified by the " " mark nearby are critical

for safety. When replacing them, be sure to use the parts of the

same type and rating as specified by the manufacturer.

(This regulation dose not Except the J and C version)

Good earth ground

Place this

probe on

each exposed

metal part.

AC VOLTMETER

(Having 1000

ohms/volts,

or more sensitivity)

1500 10W

0.15 F AC TYPE

(No.MA520<Rev.001>)5/16

1.5 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.

1.5.1 Grounding to prevent damage by static electricity

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

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.

1.6 Handling the traverse unit (optical pickup)

(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the

replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a

time when attaching it to the connector.

(3) Handle the flexible cable carefully as it may break when subjected to strong force.

(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.7 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the pickup unit.

• Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wire

is disconnected without applying solder, the pickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land sections after connecting the card wire.

Conductive material

(conductive sheet) or iron palate

(caption)

Anti-static wrist strap

SOLDER

(No.MA520<Rev.001>)6/16

1.8 Important for laser products

1.CLASS 1 LASER PRODUCT

2.CAUTION :

(For U.S.A.) Visible and/or invisible class II laser radiation

when open. Do not stare into beam.

(Others) Visible and/or invisible class 1M laser radiation

when open. Do not view directly with optical instruments.

3.CAUTION : Visible and/or invisible laser radiation when

open and inter lock failed or defeated. Avoid direct

exposure to beam.

4.CAUTION : This laser product uses visible and/or 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 and PRINT

!Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

WARNING LABEL and PRINT

(No.MA520<Rev.001>)7/16

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Main body (Used model: KW-R900BTJ)

3.1.1 Removing the Front panel (See Fig.1)

(1) Remove the 2 screws Aattaching the both side of the Front

panel.

(2) Disengage 4 hooks aengaged both side of the Front panel.

Fig.1

3.1.2 Removing the Bottom chassis (See Fig.2, 3)

(1) Remove the 2 screws Battaching the both side of the Bot-

tom chassis. (See Fig.2)

Fig.2

(2) Remove the 3 screws Cattaching the Bottom chassis.

(See Fig.3)

(3) Remove the 3 screws Dand 1 screw Eattaching the Heat

sink. (See Fig.3)

(4) Remove the 6 screws Fand 1 screw Gattaching the Rear

bracket. (See Fig.3)

Fig.3

3.1.3 Removing the Electric unit (See Fig.4, 5, 6)

(1) Remove the 2 screws Hand one screw Jattaching the

Side plate. (See Fig.4)

Fig.4

Ahook a

D F

HHJ

(No.MA520<Rev.001>)8/16

(2) Remove the 3 screws Kattaching the Electric unit. (See

Fig.5)

Fig.5

(3) Disconnect B-B connector CN502 of the Electric unit con-

nected the CD mechanism and Electric unit. (See Fig.6)

Fig.6

3.1.4 Removing the CD mechanism (See Fig.7)

(1) Remove the 3 screws Lattaching the CD mechanism.

Fig.7

3.1.5 Removing the Switch unit (See Fig.8)

(1) Remove the Volume knob.

(2) Disconnect the connector wire connected to connector

CN602 of the Switch unit.

(3) Remove the 13 screws Mattaching the Switch unit.

Fig.8

CN502

CN602

(No.MA520<Rev.001>)9/16

3.2 CD mechanism assembly section

3.2.1 Removing the Mecha control board

(1) Solder the short land on the pickup. (See Fig. 1)

Fig.1

(2) Remove the 8 wires from the Mecha control board. (See

Fig.2)

Fig.2

(3) Disconnect the flexible wire from the pickup connected to

the connector CN102 on the Mecha control board. (See

Fig.3)

(4) Remove the 2 screws Aattaching the Mecha control board.

(See Fig.3)

Fig.3

3.2.2 Removing the Traverse mechanism (See Fig.4, 5)

(1) Remove the 5 springs from the traverse mechanism. (See

Fig.4)

Fig.4

(2) Remove the 3 screws Battaching the bottom frame as-

sembly. (See Fig.5)

(3) Remove the 3 dumpers from the bottom frame assembly.

(See Fig.5)

Fig.5

3.2.3 Removing the Pickup (See Fig.6, 7)

(1) Remove the 2 screws Cattaching the feed bracket assem-

bly. (See Fig.6)

Fig.6

SOLDER

BLACK

RED

WHITE

ORANGE

WHITE

YELLOW

CN102

(No.MA520<Rev.001>)10/16

(2) Remove the shaft from the TM base. (See Fig.7)

(3) Disengage the hook aon the pickup from the TM base.

(See Fig.7)

Fig.7

3.2.4 Removing the Spindle motor (See Fig.8. 9)

(1) Remove the HC CL. Spring from the HC CL. base and the

TM base, and then lift up the HC CL. base. (See Fig.8)

Fig.8

(2) Remove the HC CL. base from the holes on the TM base.

(See Fig.9)

Fig.9

(3) Remove the 2 screws Dattaching the spindle motor. (See

Fig.10)

Fig.10

shaft

[ SIDE VIEW ]

HC CL. spring

(No.MA520<Rev.001>)11/16

3.2.5 Removing the Loading motor

(1) Remove the roller arm assembly from the bottom frame as-

sembly. (See Fig.11)

Fig.11

(2) Remove the 2 screws Eattaching the loading motor as-

sembly, and then remove the loading motor assembly in

the direction of the arrow. (See Fig.12)

Fig.12

(No.MA520<Rev.001>)12/16

SECTION 4

ADJUSTMENT

4.1 General Mode Functions

4.1.1 Micon Software / Firmware Version Checking Mode

Refer to “Service Mode” .

4.1.2 Service Mode

Refer to “Service Mode” .

4.1.3 Production Test Mode

Key to enter:

(1) In any Source

(2) In "Power On" condition, press and hold [MENU] + [POW-

ER] for 2s

(3) "PRODUCTION TEST" to be displayed in the display.

(4) Power off and On the unit to return to Normal mode.

Default setting value under Production Mode:

* Only in "Power On" condition will be able to enter the Produc-

tion Mode. Setting Value cannot be store under Production

Mode.

4.1.4 Volume 44

Key to enter:

(1) In any Source

(2) In "Power On" condition, press and hold [MENU] + [POW-

ER] for 2s →to enter Production Mode.

(3) Press and hold [BACK] + [UP] 3s →to enter Vol 44 mode

(4) LCD display shall display the following information after en-

tering this mode.

Details:The display will shown "VOLUME 44" for 2s. After

2s,it will return back to the initial source.

(5) Power off and On the unit to return to Normal mode.

* Only applicable under Production Mode.

4.1.5 Bluetooth Test Mode

Key to enter:

(1) In any Source

(2) Press and hold [BACK] + [POWER] 3s

(3) Press [VOL] Key to select the display item

(4) Select "Mic Test" to test the Quality of the mic (Clear and

no noise).

(5) Once "FINISHED", power off and On the unit to return to

Normal mode.

4.1.6 Bluetooth Connectivity Check Mode

* BT Connectivity Check Mode is for user checking BT connec-

tivity.

Key to enter:

(1) Only In Bluetooth mode with the attached USB Bluetooth

Adapter

(2) Press and hold [Phone]+ Press [VOL] 3s →to perform BT

connectivity check mode

4.1.7 User Entry Mode

Key to enter:

(1) Only applicable for J&U series in Tuner Source

(2) Press and hold [DISP] + Press [VOL] 3s

(3) LCD display shall display the following information after en-

tering this mode.

Details:Rename Tuner Station. It can be alphabets/num-

bers/symbols up to maximum 11 charaters

(4) To rename the Tuner Station, turn [Vol] left or right to select

alphabets/number/symbol

(5) Press [] key for next character.

(6) Press [Vol] to enter/confirm the name of the station.

(7) Press [BACK] to exit the mode.

Item Setting

Volume 0 to 44(max)

Beep OFF

Demo OFF

SUB.W LEVEL SUB.W 04

SUB.W LPF MID 85Hz

EQ FLAT

VOLUME 4 4

TEST MODE

MIC TEST

IN PROGRESS

FINISHED

(No.MA520<Rev.001>)13/16

4.2 Service Mode

Force Eject mode

Long Press [Eject]

1DIN: No display on screen as panel will be flipped down.

2DIN: Normal pattern + Eject

Service mode

Key to enter:

(1) In any Source

(2) Press and hold [MENU] + [DOWN] for 3s

(3) Mode Select: [VOL] turn

VOL press

BACK press

Panel micon Rom Correction

Shows Telechips Mini firmware version.

VOL press

Where ### = HC1, HC2 mecha mount status display

BACK press HC1 = HC1 mecha, HC2 = HC2 mecha, *** = can not detect.

This display should be shown in every source with or

without disc inside mecha.

VOL press VOL press

VOL press

Initialize

BACK

press After the clearing is a normal pattern

VOL turn

Name Clrar