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

(No.MA261)1-11
3.1.4 Removing the main section
(See Fig.11 to 13)
(1) Disconnect the connector wire from connector CN302 of
connection board. (See Fig.11)
(2) Disconnect the card wire from connector CN702 of main
board. (See Fig.12)
(3) Remove the four screws Qattaching the main section.
(See Fig.13)
Fig.11
Fig.12
Fig.13
CN302
CN702
Q
Q
Q
Q

1-12 (No.MA261)
3.1.5 Removing the main board
(See Fig.14)
(1) Disconnect the card wire from connector CN703 of the
main board.
(2) Remove the four screws Rattaching the main board.
Fig.14
3.1.6 Removing the sub board
(See Fig.15)
(1) Remove the four screws Sattaching the sub board.
Fig.15
3.1.7 Removing the DVD mechanism assembly
(See Fig.16)
(1) Remove the three screws Tattaching the DVD mechanism
assembly.
Fig.16
R
RR
R
S
S
S
S
T
T
T

(No.MA261)1-13
3.1.8 Removing the connection board
(See Fig.17)
(1) Remove the insulator from DVD mechanism assembly.
(2) Disconnect the card wires from connector CN301 and
CN303 of the connection board.
(3) Remove the four screws Uattaching the connection board.
Fig.17
3.1.9 Removing the monitor assembly
(See Fig. 18 and 19)
(1) Remove the ten screws Vattaching the sub connect board.
(See Fig.18)
(2) Disconnect the flexible wire from connector CN371 of the
sub connect board. (See Fig.19)
Caution:
In this time, DISC EJECT button come off to easy, do not lost it.
Fig.18
Fig.19
CN301 CN303
U
U
U
U
V
V
CN371

1-14 (No.MA261)
3.2 Monitor section
3.2.1 Removing the front bracket
(See Fig.20)
(1) Remove the two screws Wattaching the FPC cover.
(2) Remove the four screws Xand four screws Yattaching the
front bracket assembly.
(3) Disengage the four hooks band remove the front bracket
assembly.
Caution:
In this time, FPC cover come off to easy, do not lost it.
Fig.20
3.2.2 Removing the display unit
(See Fig.21)
(1) Disconnect the card wires from connector CN422 and
CN423 of the panel board.
(2) From both side of the display unit, remove the four screws
Zattaching the display unit.
(3) Disengage the six hooks cand remove the display unit.
Fig.21
3.2.3 Removing the panel board
(See Fig.22)
(1) Disconnect the flexible wire from connector CN411 of the
panel board.
(2) Disconnect the connector wire from connector CN471 of
the panel board.
(3) Remove the one screw AA attaching the earth wire.
(4) Flat to two bending part dof the panel bracket and then re-
move the panel board.
Fig.22
XX
Y
Y
Y
Y
W
bb
b
CN423 CN422
c
c
ZZ
CN411 CN471
dAA

(No.MA261)1-15
3.2.4 Removing the switch board
(See Fig.23)
(1) Remove the nine screws BB attaching the switch board.
Fig.23
BB BB

1-16 (No.MA261)
3.3 DVD mechanism assembly
3.3.1 Removing the mechanism control board
(See Fig.1)
Caution:
Before disconnecting the flexible wire extending from the DVD
pickup, solder the short-circuit point on the flexible wire using
a grounding soldering iron. If you do not follow this instruction,
the DVD pickup may be damaged.
(1) Turn over the body, and solder the short-circuit points on
the flexible wire extending from the DVD pickup.
(2) Disconnect the flexible wire from connector CN101 on the
mechanism control board.
(3) Disconnect the card wire from connector CN201 on the
mechanism control board.
(4) Disconnect the flexible wire from connector CN202 on the
mechanism control board.
(5) Unsolder two soldered points aon the mechanism control
board and remove the wire extending from the feed motor.
(6) Remove the screw Aattaching the lug wire.
(7) Remove the two screws Band screw Cattaching the
mechanism control board.
Caution:
• As the flexible wire to be connected to CN101, make sure to
attach it to the mechanism control board using a double
tape.
• After reassembling, unsolder the short-circuit points.
Fig.1
Double tape
Feed motor
Mechanism control board
CN202
CN101
B
a
C
B
CN201
Flexible wire
Short-circuit points
A
Lug wire

(No.MA261)1-17
3.3.2 Removing the top cover
(See Fig.2)
(1) Remove the two screws Dattaching the top cover on the
back of the body.
(2) Remove the top cover upward.
Reference:
When reassembling, set part bof the top cover under the
bending part cof the chassis frame.
3.3.3 Removing the mechanism section
(See Fig.2 to 4)
• Remove the top cover.
(1) From the bottom of the body, remove the screw Eattaching
the lug wire. (See Fig.2.)
(2) Remove the two screws Fattaching the right and left stop-
pers on the front side. (See Fig.2.)
(3) Remove the two floating springs on the bottom of the body.
(See Fig.3.)
(4) Move the mechanism section upward and remove from the
chassis frame.
The three damper springs come off from the dampers.
(See Fig.4.)
Caution:
• When reassembling, reattach the damper spring to the
damper respectively and insert the three shafts on the bot-
tom of the mechanism to the dampers.
• Before inserting the shaft to the dampers, apply IPA to the
hole of damper.
Fig.2
Fig.3
Fig.4
D
Top cover
Stopper
Stopper
F
F
b
cE
Lug wire
D
Floating spring
Mechanism section
Damper (R)
(Purple)
Damper (F)
(Black)
Damper (F)
(Black)
Chassis frame
Damper SP.(F)
(Silver)
Damper SP.(F)
(Silver)
Damper SP.(R)
(Red)

1-18 (No.MA261)
3.3.4 Removing the clamper unit
(See Fig.5 to 7)
• Remove the top cover and the mechanism section.
(1) Remove the clamper2 spring on the bottom of the mecha-
nism section. (See Figs.5.and 6.)
(2) Release the part dof the clamper spring from the bending
part of the chassis base assembly. (See Fig.7.)
(3) Move the clamper unit in the direction of the arrow and turn.
Release the two joints eand f, then remove the clamper
unit upward. (See Fig.6.)
3.3.5 Reattaching the clamper unit
(See Fig.5 to 9)
(1) Attach the clamper spring to the clamper unit. (See Fig.8.)
(2) Move the clamper unit to set the side joints eand f to each
boss of the chassis base assembly. Make sure that part g
is inserted to the notch of the chassis base assembly. (See
Figs.5 and 9.)
(3) Move the part dof the clamper spring to the outside of the
bending part of the chassis base assembly. (See Fig.7.)
(4) Attach the clamper2 spring to the chassis base assembly.
(See Figs.5 and 6.)
Caution:
When reattaching, temporarily hook the end of the clamper
spring as shown in the figure to make the work easy. (See
Fig.8.)
Fig.5
Fig.6
Fig.7
Clamper unit
Clamper spring
Clamper2 spring
g
f
e
Chassis base assembly
Clamper2 spring
Chassis base assembly
Clamper spring
Chassis base assembly
d

(No.MA261)1-19
Fig.8
Fig.9
Clamper unit
Clamper spring
Notch
g
Clamper unit

1-20 (No.MA261)
3.3.6 Removing the front unit
(See Fig.10 to 12)
• Remove the top cover and the mechanism section.
(1) Disconnect the flexible wire from connector CN202 on the
mechanism control board at the bottom of the body. (See
Fig.10.)
(2) Remove the screw Gattaching the front unit on the top of
the body. (See Fig.11.)
(3) Move the front unit toward the front to release joint h, and
release two joints iand jon the right side of the chassis
base assembly. Then remove the front unit upward. (See
Figs.11 and 12.)
(4) Remove the two screws Hattaching the switch board. (See
Fig.12.)
Reference:
You can remove the switch board only without removing the
front unit.
Caution:
When reassembling, attach the flexible wire extending from
the switch board using the double tape. (See Figs.10 and 12.)
Fig.10
Fig.11
Fig.12
Mechanism control board
Flexible wire
CN202
Double tape
G
Front unit
h
h
Front unit
Switch board
j
G
H
i
Double tape