Jvc KW-R900-BTJ Service Manual

SERVICE MANUAL

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>

2012/1

SPECIFICATION

For US

AUDIO AMPLIFIER SECTION

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

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

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 kΩ load (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)

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 40 dB

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

Mass 1.8 kg (4 lbs) (excluding accessories)

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”)

65 dB

9 kHz step: 531 kHz to 1 611 kHz

• Subject to change without notice.

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

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

SPECIFICATION

For ASIA

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 Ω to 8 Ω allowance)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 80 dB

Line-Out or Subwoofer-Out Level/Impedance 5 V/20 kΩ load (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)

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)

Mass 1.5 kg (excluding accessories)

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

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

65 dB

• Subject to change without notice.

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

SECTION 1

PRECAUTION

1.1 Safety Precautions

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

many circuits and components specially for safety purposes. 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 performed 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 characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service 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 characteristics 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 reassembling.

(5) Leakage shock hazard testing

After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna 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, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current 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, 1,000Ω per volt or more sensitivity in the following manner. Connect a 1,500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed 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.).

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

0.15 F AC TYPE

Place this probe on

1500 10W

Good earth ground

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 preforming 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)

each exposed metal part.

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

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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron palate

(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.

SOLDER

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

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.

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

REPRODUCTION AND POSITION OF LABELS and PRINT

WARNING LABEL and PRINT

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

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 A attaching the both side of the Front

panel.

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

(2) Remove the 3 screws C attaching the Bottom chassis.

(See Fig.3)

(3) Remove the 3 screws D and 1 screw E attaching the Heat

sink. (See Fig.3)

(4) Remove the 6 screws F and 1 screw G attaching the Rear

bracket. (See Fig.3)

hook

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

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

tom chassis. (See Fig.2)

Fig.1

D F

Fig.3

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

(1) Remove the 2 screws H and one screw J attaching the

Side plate. (See Fig.4)

HHJ

Fig.4

Fig.2

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

(2) Remove the 3 screws K attaching the Electric unit. (See

Fig.5)

3.1.5 Removing the Switch unit (See Fig.8)

(1) Remove the Volume knob. (2) Disconnect the connector wire connected to connector

of the Switch unit.

CN602

(3) Remove the 13 screws M attaching the Switch unit.

CN602

Fig.5

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

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

CN502

Fig.6

3.1.4 Removing the CD mechanism (See Fig.7)

(1) Remove the 3 screws L attaching the CD mechanism.

Fig.8

Fig.7

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

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)

SOLDER

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

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

Fig.4)

Fig.1

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

Fig.2)

BLACK

RED

WHITE

YELLOW

ORANGE

WHITE

YELLOW

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 A attaching the Mecha control board.

(See Fig.3)

Fig.4

(2) Remove the 3 screws B attaching 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 C attaching the feed bracket assem-

bly. (See Fig.6)

Fig.3

CN102

Fig.6

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

(2) Remove the shaft from the TM base. (See Fig.7) (3) Disengage the hook a on the pickup from the TM base.

(See Fig.7)

shaft

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

(See Fig.9)

Fig.9

(3) Remove the 2 screws D attaching the spindle motor. (See

Fig.10)

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)

HC CL. spring

[ SIDE VIEW ]

Fig.8

Fig.10

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

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 E attaching 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>)11/16

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:

Item Setting

Volume 0 to 44(max)

Beep OFF

Demo OFF

SUB.W LEVEL SUB.W 04

SUB.W LPF MID 85Hz

EQ FLAT

* Only in "Power On" condition will be able to enter the Production 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.

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).

TEST MODE

MIC TEST

IN PROGRESS

FINISHED

(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 connectivity.

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.

VOLUME 44

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.

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

Details:Rename Tuner Station. It can be alphabets/numbers/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.

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

Service Mode

Mecha Display

Data Clear

VOL press

BACK press

VOL press

BACK press

VOL press VOL press

BACK press

Version MAIN**** Panel V***

HD V***** R**-**

MINI V****USB V****

CD ###

Initialize All

VOL turn

Name Clear

VOL turn

CD Error Clear

VOL turn

USB Error Clear

VOL turn

CH Error Clear

VOL turn

Init Bluetooth

Panel micon Rom Correction Shows Telechips Mini firmware version.

Where ### = HC1, HC2 mecha mount status display HC1 = HC1 mecha, HC2 = HC2 mecha, *** = can not detect.

This display should be shown in every source with or without disc inside mecha.

Initialize