JVC KD-AVX20E User manual

SERVICE MANUAL
COPYRIGHT © 2009 Victor Company of Japan, Limited No.MA446<Rev.001>
2009/3
DVD/CD RECEIVER
MA446<Rev.001>20093SERVICE MANUAL
KD-AVX20E, KD-AVX20EU, KD-AVX20EE,
KD-AVX20UT, KD-AVX20A, KD-AVX40J,
KD-AVX40E, KD-AVX40EE
COPYRIGHT © 2009 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
Only for KD-AVX40 Except KD-AVX20UT,
KD-AVX20A, KD-AVX40J
Except KD-AVX40J
Except KD-AVX40J
Only for
KD-AVX40J

1-2 (No.MA446<Rev.001>)
SPECIFICATION
KD-AVX40J
AMPLIFIER
Power Output 20 W RMS ×4 Channels at 4 Ωand < or = 1% THD+N
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Equalizer Control Range Frequencies 60.0 Hz, 150.0 Hz, 400.0 Hz, 1.0kHz, 2.5kHz, 6.3kHz,
15.0kHz
Level ±10 dB
Audio Output Level
LINE OUT
(REAR)/SUBWOOFER
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 k Ω
Color System NTSC
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals Input LINE IN, VIDEO IN, USB input terminal, Antenna input
Output VIDEO OUT, DIGITAL OUT
Others CD changer, OE REMOTE, MIC IN
FM/AM TUNER
Frequency Range FM (with channel interval set to
100 kHz or 200 kHz)
87.5 MHz to 107.9 MHz
FM (with channel interval set to 50 kHz) 87.5 MHz to 108.0 MHz
AM (with channel interval set to 10 kHz) 530 kHz to 1 710 kHz
AM (with channel interval set to 9 kHz) 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 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
AM Tuner Sensitivity/Selectivity 20 µV/40 dB
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
MONITOR
Screen Size 3.5 inch wide liquid crystal display
Number of Pixel 211 200 pixels: 960 (horizontal) ×220 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 16:9 (wide)
Allowable Storage Temperature -10°C to +60°C (14°F to 140°F)
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
USB
USB Standards USB 2.0 Full Speed
Data Transfer Rate Full Speed: Maximum 12 Mbps
Low Speed: Maximum 1.5 Mbps

(No.MA446<Rev.001>)1-3
Design and specifications are subject to change without notice.
KD-AVX40/KD-AVX20 for Europe
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 500 mA
BLUETOOTH
Version Bluetooth 1.2 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m (10.9 yd)
Profile HFP (Hands-Free Profile) 1.5
OPP (Object Push Profile) 1.1
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio/Video Remote Control Profile) 1.3
GENERAL
Power Requirements 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) Installation Size (approx.) 182 mm ×52 mm ×160 mm (7-3/16” ×2-1/16” ×6-5/16”)
Panel Size (approx.) 188 mm ×58 mm ×12 mm (7-7/16” ×2-5/16” ×1/2”)
Mass (approx.) 2.2 kg (4.9 lbs) (excluding accessories)
AMPLIFIER
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/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
60.0 Hz, 150.0 Hz, 400.0 Hz, 1.0kHz, 2.5kHz, 6.3kHz, 15.0kHz
Level ±10 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level LINE OUT
(REAR)/SUBWOOFER:
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System PAL
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals Input LINE IN, VIDEO IN, USB input terminal, Aerial input
Output VIDEO OUT, DIGITAL OUT
Others CD changer, OE REMOTE, MIC IN
FM/AM TUNER
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 9.3 dBf (0.8 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
MW Tuner Sensitivity/Selectivity 20 µV/40 dB
LW Tuner Sensitivity 50 µV

1-4 (No.MA446<Rev.001>)
Design and specifications are subject to change without notice.
KD-AVX20UT/A
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
MONITOR
Screen Size 3.5 inch wide liquid crystal display
Number of Pixel 211 200 pixels: 960 (horizontal) ×220 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 16:9 (wide)
Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
USB
USB Standards USB 2.0 Full Speed
Data Transfer Rate Full Speed: Maximum 12 Mbps
Low Speed: Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 500 mA
BLUETOOTH (KD-AVX40 only)
Version Bluetooth 1.2 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m
Profile HFP (Hands-Free Profile) 1.5
OPP (Object Push Profile) 1.1
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio/Video Remote Control Profile) 1.3
GENERAL
Power Requirements 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.) 182 mm ×52 mm ×160 mm
Panel Size (approx.) 188 mm ×58 mm ×12 mm
Mass (approx.) 2.2 kg (excluding accessories)
AMPLIFIER
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/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
60.0 Hz, 150.0 Hz, 400.0 Hz, 1.0kHz, 2.5kHz, 6.3kHz, 15.0kHz
Level ±10 dB

(No.MA446<Rev.001>)1-5
Design and specifications are subject to change without notice.
Signal-to-Noise Ratio 70 dB
Audio Output Level LINE
OUT (REAR)/SUBWOOFER
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System NTSC/PAL
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals Input LINE IN, VIDEO IN, USB input terminal, Antenna input
Output VIDEO OUT, DIGITAL OUT
Others CD changer, OE REMOTE
FM/AM TUNER
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 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
AM Tuner Sensitivity/Selectivity 20 µV/40 dB
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
MONITOR
Screen Size 3.5 inch wide liquid crystal display
Number of Pixel 211 200 pixels: 960 (horizontal) ×220 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 16:9 (wide)
Allowable Storage Temperatur -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
USB
USB Standards USB 2.0 Full Speed
Data Transfer Rat Full Speed: Maximum 12 Mbps
Low Speed: Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 500 mA
GENERAL
Power Requirements 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.) 182 mm ×52 mm ×160 mm
Panel Size (approx.) 188 mm ×58 mm ×12 mm
Mass (approx.) 2.2 kg (excluding accessories)

1-6 (No.MA446<Rev.001>)
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.

(No.MA446<Rev.001>)1-7
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
CENTER
R21
D- DGND_7
R312
R317
WOOFER
TP67
R357
TP79 TP81
TP92
Voltage supply
position
CN164
CN101
TP81
TP79

1-8 (No.MA446<Rev.001>)
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

(No.MA446<Rev.001>)1-9
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are KD-AVX40J)
3.1.1 Removing the Bottom chassis (See Fig.1 to 4)
(1) Remove the two screws Aand two screws Battaching the
Heat sink. (See Fig.1)
(2) Remove the one screw Cattaching the Bottom chassis.
(See Fig.1)
Fig.1
(3) Remove the one screw Dattaching the Bottom chassis.
(See Fig.2)
Fig.2
(4) Remove the three screws Eattaching the Bottom chassis.
(See Fig.3)
Fig.3
(5) Remove the two screws Fattaching the Bottom chassis.
(See Fig.4)
Fig.4
3.1.2 Removing the Main board (See Fig.5 to 8)
(1) Disconnect the card wire from Front chassis connected to
connector CN962 of the Main board. (see Fig.5)
(2) Disconnect the connector wire from Gear bracket unit con-
nected to connectors CN881 and CN891 of the Main
board. (See Fig.5)
(3) Remove the two screws Gattaching the Main board. (See
Fig.5)
Fig.5
(4) Remove the one screw Hattaching the Rear bracket. (See Fig.6)
A
BC
D
E
F
F
CN962CN891
CN881
G

1-10 (No.MA446<Rev.001>)
Fig.6
(5) Remove the one screw Jattaching the Heat sink. (See
Fig.7)
(6) Remove the four screws Kand one screw Lattaching the
Rear bracket. (See Fig.7)
Fig.7
(7) Disconnect the connector wires from Rear bracket con-
nected to connectors CN861, CN871, CN922, CN923 and
CN931 of the Main board. (See Fig.8)
Fig.8
3.1.3 Removing the DVD mechanism (See Fig.9)
(1) Remove the three screws Mattaching the DVD mecha-
nism.
Fig.9
3.1.4 Removing the Connection board (See Fig.10)
(1) Disconnect the card wire from DVD mechanism connected
to connector CN395 of the Connection board.
(2) Disconnect the connector wire from BT antenna connected
to connector of RF module.
(3) Remove the three screws Nattaching the Connection
board.
Fig.10
3.1.5 Removing the Panel A control board (See Fig.11)
(1) Remove the eight screws Pattaching the Rear cover.
Fig.11
H
JL
K
CN931
CN861CN923CN871CN922
M
M
M
N
N
RF module
CN395
Connecotr
wire
P
P