JVC KD-DB101EX User manual

SERVICE MANUAL
COPYRIGHT © 2007 Victor Company of Japan, Limited No.MA319
2007/4
CD RECEIVER
MA31920074SERVICE MANUAL
KD-DB101EX, KD-DB101EY
COPYRIGHT © 2007 Victor Company of Japan, Limited
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)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1-2 (No.MA319)
SPECIFICATION
Design and specifications are subject to change without notice.
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/Rear 19 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)
Tone Control Range Bass ±10 dB at 100 Hz
Treble ±10 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminals Steering wheel remote input, AUX (auxiliary) input jack
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 11.2 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 35 dB
MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV
DAB Tuner Sensitivity -100 dBm (Band III)/-98 dBm (L-Band)
Selectivity 40 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate : 320 kbps
WMA (Windows Media® Audio) Decoding Format 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
Dimensions (W ×H ×D)
(approx.)
Installation Size 182 mm ×52 mm ×150 mm
Panel Size 188 mm ×58 mm ×13 mm
Mass 1.4 kg (excluding accessories)

(No.MA319)1-3
SECTION 1
PRECAUTION
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.

1-4 (No.MA319)
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 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.
1.3 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.
(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 after connecting the card wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Wires Push switch
Pickup
Base board
Pickup
Connector
Flexible wire
Frame CD mechanism
assembly

(No.MA319)1-5
1.5 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

1-6 (No.MA319)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA319)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the BOTTOM COVER
(See Fig.1)
(1) Disengage five hooks aengaged the BOTTOM COVER.
Fig.1
3.1.2 Removing the HEAT SINK
(See Fig.2)
(1) Remove the two screws Aand one screw Battaching the
HEAT SINK.
Fig.2
3.1.3 Removing the FRONT CHASSIS
(See Fig.3)
(1) Remove the two screws Cattaching the both side of
FRONT CHASSIS.
(2) Disengage two hooks bengaged the both side of FRONT
CHASSIS.
Fig.3
a
A
B
C
hook a

1-8 (No.MA319)
3.1.4 Removing the REAR BRACKET
(See Fig.4)
(1) Remove the one screw Dattaching the LINE OUT JACK.
(2) Remove the one screw Eattaching the ANTENNA CABLE.
(3) Remove the one screw Fattaching the DAB ANTENNA ter-
minal.
(4) Remove the one screw Gattaching the REMOTE CABLE.
(5) Remove the one screw Hattaching the IC bracket.
(6) Remove the three screws Jattaching the REAR BRACK-
ET.
Fig.4
3.1.5 Removing the MAIN BOARD assembly
(See Fig.5)
(1) Remove the two screws Kattaching the MAIN BOARD as-
sembly.
(2) Disconnect the connector CN501 connected MAIN
BOARD assembly and CD mechanism assembly.
Fig.5
3.1.6 Removing the CD mechanism assembly
(See Fig.6)
(1) Remove the three screws Lattaching the CD mechanism
assembly.
Fig.6
3.1.7 Removing the REAR COVER
(See Fig.7)
(1) Remove the VOLUME KNOB.
(2) Remove the five screws Mattaching the REAR COVER.
(3) Disengage fourteen hooks cengaged the REAR COVER.
Fig.7
3.2 CD mechanism assembly section
For CD mechanism assembly, please refer the service manual TN2007-1010 , No.MY005 and No.MY005B.
DH J
EFJJG
KK
CN501
LL
L
MMM
M
hook
c
hook
c
hook
c

(No.MA319)1-9
SECTION 4
ADJUSTMENT
4.1 Adjustment method
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Electric voltmeter
(3) Digital tester
(4) Tracking offset meter
(5) Test Disc JVC: CTS-1000
(6) Extension cable for check
EXTSH002-22P ×1
Standard volume position
Balance and Bass & Treble volume: Indication "0"
Loudness: OFF
Dummy load
Exclusive dummy load should be used for AM, and FM. For FM
dummy load, there is a loss of 6dB between SSG output and
antenna input. The loss of 6dB need not be considered since
direct reading of figures are applied in this working standard.
Standard measuring conditions
Power supply voltage: DC14.4V(10.5 - 16V)
Load impedance: 20KΩ(2 Speakers connection)
Output Level: Line out 2.0V (Vol. MAX)
How to connect the extension cable for adjustment
CAUTION:
Be sure to attach the heat sink and rear bracket onto the power amplifier and regulator respectively, before supply the power.
If voltage is applied without attaching those parts, the power amplifier IC and regulator IC will be destroyed by heat.
EXTSH002-22P
Extension cable

1-10 (No.MA319)
SECTION 5
TROUBLESHOOTING
5.1 16 PIN CORD DIAGRAM
10
12
14
16
BR
YL
NC
BK
NC
NC
BL/WH
RD
9
11
13
15
2
4
6
8
VI/BK
GY/BK
WH/BK
GN/BK
VI
GY
WH
GN
1
3
5
7
Black
RD
BK
Red
BL Blue
WH White
GN Green
VI Violet
GY Gray
YL Yellow
BR Brown
1
2
3
4
5
6
7
8
10
12
13
15
16
VI
VI/BK
GY
GY/BK
WH
WH/BK
GN
GN/BK
BR
YL
BL/WH
BK
RD
RR
FR
FL
RL
REMOTE
TEL
ANT
ACC
GND
MEMORY
Rear Right
Front Right
Front Left
Rear Left
Remote out
ACC Line
Ground
Memory Backup Battery+
Telephone Muting
Auto Antenna
GND
ACC
REMOTE
MEMORY
TEL
RR+
RR-
FR+
FR-
FL+
FL-
RL+
RL-
GROUND
ACC + 12Volt
MEMORY BACKUP
DIRECT TO BATTERY
+12Volt

(No.MA319)1-11

(No.MA319)
VPT
Printed in Japan
Victor company of Japan, Limited
Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan