JVC KD-AVX55E, KD-AVX55EU, KD-AVX55EE, KD-AVX55A, KD-AVX77J Service Manual
...
SERVICE MANUAL
DVD/CD RECEIVER
MA454<Rev.001>20095SERVICE MANUAL
KD-AVX55E, KD-AVX55EU, KD-AVX55EE,
KD-AVX55A, KD-AVX77J, KD-AVX77E,
KD-AVX77EU, KD-AVX77EE, KD-AVX77A
Only for KD-AVX77J
Only for KD-AVX77
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)
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COPYRIGHT © 2009 Victor Company of Japan, Limited
Except KD-AVX77JExcept KD-AVX77J
TABLE OF CONTENTS
No.MA454<Rev.001>
2009/6
SPECIFICATION
KD-AVX77J
AMPLIFIER
Power Output 20 W RMS × 4 Channels at 4 Ω and < or = 1% THD+N
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Audio Output Level
LINE OUT (FRONT, REAR), CENTER OUT, SUBWOOFER OUT
Color System NTSC
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals Input LINE IN, VIDEO IN, USB input, Antenna input
Output 2nd AUDIO 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
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
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 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 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
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
Version Bluetooth 1.2 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m (10.9 yd)
Line-Out Level/Impedance 5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
1-2 (No.MA454<Rev.001>)
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
MONITOR
Screen Size 5.4 inch wide liquid crystal display
Number of Pixel 576 000 pixels: 800 (horizontal) × 3 (RGB) × 240 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 3.32:1 (Super wide)
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
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)
Dimensions (W × H × D) Installation Size
182 mm × 52 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”)
(approx.)
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 the accessories)
Design and specifications are subject to change without notice.
KD-AVX77/KD-AVX55 (Except KD-AVX77J)
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 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level
LINE OUT (FRONT, REAR), CENTER OUT, SUBWOOFER OUT
Line-Out Level/Impedance 5 V/20 kΩ load (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, Aerial input
Output 2nd AUDIO 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
(No.MA454<Rev.001>)1-3
LW Tuner Sensitivity 50 µV
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 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
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-AVX77 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
MONITOR
Screen Size 5.4 inch wide liquid crystal display
Number of Pixel 576 000 pixels: 800 (horizontal) × 3 (RGB) × 240 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 3.32:1 (Super wide)
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size
182 mm × 52 mm × 160 mm
(approx.)
Panel Size (approx.) 188 mm × 58 mm × 12 mm
Mass (approx.) 2.2 kg (excluding the accessories)
Design and specifications are subject to change without notice.
1-4 (No.MA454<Rev.001>)
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 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.).
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.MA454<Rev.001>)1-5
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
1M
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 connecto 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 short part
1-6 (No.MA454<Rev.001>)
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.MA454<Rev.001>)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-8 (No.MA454<Rev.001>)
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are KD-AVX77E)
3.1.1 Removing the Top chassis with DVD mechanism (See
Fig.1 to 4)
(1) Remove the two screws A and two screws B attaching the
Heat sink. (See Fig.1)
(2) Remove the one screw C attaching the Top chassis. (See
Fig.1)
A
BC
Fig.1
(3) Remove the one screw D attaching the Top chassis. (See
Fig.2)
D
Fig.2
(4) Remove the three screws E attaching the Top chassis.
(See Fig.3)
E
(5) Remove the two screws F attaching the Top chassis. (See
Fig.4)
F
F
Fig.4
3.1.2 Removing the Main board (See Fig.5 to 10)
(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 connector CN881 and CN891 of the Main board.
(See Fig.5)
(3) Remove the two screws G attaching the Main board. (See
Fig.5)
CN962
CN891
G
Fig.3
CN881
G
Fig.5
(4) Remove the two screws H attaching the Bottom chassis.
(See Fig.6)
H
Fig.6
(No.MA454<Rev.001>)1-9
(5) Remove the two screws J attaching the Wire bracket. (See
Fig.7)
J
Fig.7
(6) Disconnect connector wire from Rear bracket connected to
connectors CN861
of the Main board. (See Fig.8)
CN981
CN981
(7) Remove the two screws K attaching the Heat sink. (See
Fig.9)
(8) Remove the one screw L attaching the Antenna wire. (See
Fig.9)
(9) Remove the one screw M attaching the USB cable. (See
Fig.9)
, CN871, CN921, CN922, CN923 and
CN861CN871 CN823CN921
CN922
Fig.8
N
Fig.10
3.1.3 Removing the DVD mechanism (See Fig.11)
(1) Remove the three screws P attaching the DVD mecha-
nism.
P
P
Fig.11
P
LM
K
Fig.9
(10) Remove the one screw N attaching the Main board. (See
Fig.10)
1-10 (No.MA454<Rev.001>)
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