JVC KW-AVX700E User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MA261
2006/4
DVD RECEIVER WITH MONITOR
MA26120064
KW-AVX700E,KW-AVX700U,
KW-AVX700UN,KW-AVX700A,
KW-AVX701UN,KW-AVX706J,
KW-AVX706U,KW-AVX706UN,
KW-AVX706E,KW-AVX706EU,
KW-AVX706EE
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

1-2 (No.MA261)
SPECIFICATION
AMPLIFIER
Power Output (for northern america) 20 W RMS × 4 Channels at 4 Ω and [< or =] 1% THD+N
Maximum Power Output
(except northern america)
Front/Rear 50 W per channel
Continuous Power Output (RMS)
(except northern america)
Front/Rear 20 W per channel into 4
Ω , 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Signal to Noise Ratio For northern america 80 dBA (reference: 1 W into 4
Ω )
Except northern america 70 dB
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
(F-OUT/R-OUT/CENTER/SUBWOOFER)
Line-Out Level/Impedance 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Color System NTSC (for northern america)
PAL (for europe and australia)
PAL/NTSC (for asisa)
Video Output (composite) 1 Vp-p/75
Ω
Other Terminals Input LINE IN, VIDEO IN, Antenna input
Output 2nd AUDIO OUT
Others CD changer, AV BUS
FM/AM TUNER
Frequency Range FM (for northern america) 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)
87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
Fm (ecxept northern america) 87.5 MHz to 108.0 MHz
AM (for northern america) 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
531 kHz to 1 602 kHz (with channel interval set to 9 kHz)
AM (for europe and australia) (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 kHz
AM (for asia) 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
AM Tuner (for northern america) Sensitivity/Selectivity 20
µ V/35 dB
MW Tuner (for europe and australia) Sensitivity/Selectivity 20
µ V/35 dB
LW Tuner (for europe and australia) Sensitivity 50
µ V
AM Tuner (for asia) Sensitivity/Selectivity: 20
µ V/35 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

(No.MA261)1-3
Design and specifications are subject to change without notice.
MONITOR
Screen Size 6.5 inch wide liquid crystal display
Number of Pixel 280 800 pixels: 400 (horizontal)
× 3 × 234 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System NTSC (for northern america)
PAL/NTSC (except northern america)
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)
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) Installation Size (approx.) 178 mm × 100 mm × 160 mm (7-1/16" × 3-15/16" × 6-5/16")
Panel Size (approx.) 170 mm
× 93 mm × 29 mm (6-3/4" × 3-11/16" × 1-3/16")
Mass (approx.) 2.6 kg (5.8 lbs) (excluding accessories)

1-4 (No.MA261)
SECTION 1
PRECAUTIONS
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.MA261)1-5
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 flexible wire is disconnected from the connector on the pickup unit.
(If the flexible 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 flexible wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Mechanism control board
CN101
Flexible wire
Short-circuit points

1-6 (No.MA261)
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses 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
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
CLASS 1
LASER PRODUCT

(No.MA261)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MA261)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the front panel assembly
(See Fig.1 to 4)
(1) From the bottom side of main body, insert the screw-driver
to hole of the third gear from hole aof the bottom chassis,
and then turn the gear to clockwise until front panel assem-
bly comes up. (See Fig.1)
(2) Remove the two screws Aattaching the front panel assem-
bly. (See Fig.2)
(3) Remove the four screws Battaching the front panel as-
sembly. (See Fig.2)
(4) Disengage the front panel assembly from hook band re-
move the front panel assembly. (See Fig.2)
(5) Remove the two screws Cattaching the front panel assem-
bly. (See Fig.3)
(6) Disconnect the connector wire from connector CN374 of
the connection board and then take out the front panel as-
sembly. (See Fig.4)
Fig.1
Fig.2
Fig.3
Fig.4
a
A
B
B
(both side)
CC
CN374

(No.MA261)1-9
3.1.2 Removing the bottom chassis assembly
(See Fig.5 to 8)
(1) Remove the four screws Dand two screws Eattaching the
heat sink. (See Fig.5)
(2) Remove the two screws Fattaching the bottom chassis as-
sembly. (See Fig.6)
(3) Remove the two screws Gattaching the bottom chassis as-
sembly. (See Fig.7)
(4) Remove the three screws Hand one screw Jattaching the
rear bracket. (See Fig.8)
Fig.5
Fig.6
Fig.7
Fig.8
CC
D
F
F
G
HJHJ

1-10 (No.MA261)
3.1.3 Removing the rear bracket
(See Fig.9 and 10)
(1) Remove the two screws Kand one screw Lattaching the
rear heat sink. (See Fig.9)
(2) Remove the eight screws M, two screws Nand one screw
Pattaching the rear bracket. (See Fig.9)
(3) Disconnect the connector wire from fan motor connected to
CN681 of the sub board. (See Fig.10)
Fig.9
Fig.10
KMMM
MNN
P
MMMM
K
L
CN681