JVC HXD-77-UJ Service manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB55620068
HX-D77UJ
SP-HXD77
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
CA-HXD77 SP-HXD77
TABLE OF CONTENTS
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.MB556
2006/8
SPECIFICATION
Amplifier section
(CA-HXD77)
Tuner section FM tuning range 87.5 MHz - 108.0 MHz
Disc player section Playable disc DVD Video CD/VCD/SVCD
General Power requirement AC 110 V - AC 240 V , 50/60 Hz
Speaker section
(SP-HXD77)
Output Power SUBWOOFERS 125 W per channel, min. RMS, driven into 3 Ω at 100 Hz with no more
than 10% total harmonic distortion. (IEC 268-3) (at 230 V , 50 Hz)
MAIN SPEAKERS 90 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no more
than 10% total harmonic distortion. (IEC 268-3) (at 230 V , 50 Hz)
Audio input sensitivity/
impedance
Video input sensitivity/
impedance
Digital output DIGITAL OUTPUT (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm)
VIDEO OUT Color system NTSC or PAL
Speaker Terminals 6 Ω - 16 Ω (main speakers)
AM tuning range 530 kHz - 1 710 kHz (at 10 kHz intervals)
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
Power consumption 90 W/ 150 VA (at operation)
Dimensions (approx.) (W/H/D) 175 mm × 373 mm × 411 mm (6 15/16 in. × 14 11/16 in. × 16 3/16 in.)
Mass (approx.) 5.8 kg (12.8 lbs)
Type 4-Way Front Twin Woofer (Magnetically Shielded Type)
Speakers Subwoofer 16 cm (6 5/16 in.) cone × 1
Power handling capacity Subwoofer 180 W
Impedance Subwoofer 3 Ω
Frequency range Subwoofer 30 Hz - 1 000 Hz
Sound pressure level Subwoofer 73 dB/W·m
Dimensions (approx.) (W/H/D) 296 mm × 453 mm × 343 mm (11 11/16 in. × 17 7/8 in. × 13 9/16 in.)
Mass (approx.) 7.5 kg (16.5 lbs) each
AUX 400 mV/47 kΩ
USB USB Version 1.1
GAME/AUX
(composite video)
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance) : 1 V(p-p)/75 Ω
Woofer 16 cm (6 5/16 in.) cone × 1
Mid range 7 cm (2 13/16 in.) cone × 1
Tweeter 2 cm (13/16 in.) piezo × 1
Main speaker 90 W
Main speaker 6 Ω
Main speaker 50 Hz - 20 000 Hz
Main speaker 82 dB/W·m
1 V(p-p)/75 Ω
C (chrominance, burst) : NTSC : 0.286 V(p-p)/75 Ω
C (chrominance, burst) : PAL : 0.3 V(p-p)/75 Ω
3 Ω - 6 Ω (subwoofers)
531 kHz - 1 710 kHz (at 9 kHz intervals)
CD-R/CD-RW (recorded in Audio CD/Video CD/Super Video CD/MP3/
WMA/JPEG format)
DVD-R/DVD-RW (recorded in DVD-Video or DVD-VR format)
+R/+RW (recorded in DVD-Video or DVD-VR format)
8 W (on standby: with power saving off-Normal mode)
1 W (on standby: with power saving on-Eco mode)
Design and specifications are subject to change without notice.
1-2 (No.MB556)
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.MB556)1-3
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.
!
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
1-4 (No.MB556)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB556)1-5
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the top cabinet
(See Fig.1, 2)
(1) From the back side of the main body, remove the five
screws A attaching the top cabinet. (See Fig.1)
(2) From the both side of the main body, remove the four
screws B attaching the top cabinet. (See Fig.2.)
(3) Remove the top cabinet from the main body while lifting the
rear section of the top cabinet in the direction of the arrow.
(See Fig.2)
3.1.2 Removing the fan
(See Fig.1, 3)
• Remove the top cabinet.
(1) From the back side of the main body, remove the two
screws C attaching the fan to the rear cabinet. (See Fig.1)
(2) Remove the connector wire from the connector CN108
the AMP board. (See Fig.3)
(3) Take out the fan from the main body.
of
Top cabinet
C
A
C
AA
CN108
SMCN01
Fig.1
Top cabinet
B
Fig.2
AMP board
CN101
CN102
CN103
CN104
1-6 (No.MB556)
SMCN02
SMPS board
Fig.3
3.1.3 Removing the AMP board
(See Fig.3 to 5)
• Remove the top cabinet.
(1) Disconnect the connector wire from the connector CN102
of the AMP board. (See Fig.3)
(2) Disconnect the card wires from the connectors CN101
, CN104 of the AMP board. (See Fig.3)
CN103
(3) Disconnect the connector wires from the connectors
SMCN01
(4) From the back side of the main body, remove the five
screws D attaching the AMP board to the rear cabinet.
(See Fig.4)
(5) From the right side of the main body, remove the one screw
E attaching the AMP board to the PCB holder. (See Fig.5)
(6) Take out the AMP board from the main body.
, SMCN02 of the SMPS board. (See Fig.3)
Rear cabinet
,
D
F
Faa
Fig.4
AMP board
PCB holder
Fig.5
E
(No.MB556)1-7
3.1.4 Removing the SMPS board
(See Fig.4, 6, 7)
• Remove the top cabinet and the AMP board.
(1) From the back side of the main body, remove the two
screws F attaching the rear cabinet. (See Fig.4)
(2) From the top side of the main body, remove the one screw
G attaching the earth wire on the bottom cabinet. (See
Fig.6)
(3) Remove the two hooks a toward this side and remove the
rear cabinet. (See Fig.4)
(4) From the reverse side of the rear cabinet, remove the four
screws H attaching the rear cabinet. (See Fig.7)
(5) Release the nine claws b. (See fig.7)
(6) Take out the SMPS board from the rear cabinet.
SMPS board
Bottom cabinet
G
Fig.6
H
b
b
SMPS board
H
HH
b
Fig.7
b
1-8 (No.MB556)
3.1.5 Removing the 5DVD mechanism assembly
(See Fig.8 to 11)
• Remove the top cabinet, the rear cabinet and the AMP board.
(1) From the top side of the main body, release the two claws
c and remove the PCB holder from the 5DVD mechanism
assembly. (See Fig.8)
(2) From the top side of the main body, remove the two screws
J from the main body. (See Fig.9)
(3) From the both side of the main body, remove the two
screws K and then remove the 5DVD mechanism assembly from the main body in the direction of the arrow. (See
Fig.10)
(4) From the top side of the 5DVD mechanism assembly, re-
move the four screws L and remove the 5DVD mechanism
assembly and the deck holder. (See Fig.11)
Reference:
When removing the doors, release the claws d of the doors
and then remove the five doors from the 5DVD mechanism assembly. (See Fig.11)
Note:
When releasing the claws d, take care not to break them. (See
Fig.11)
5DVD mechanism assembly
Front cabinet assembly
K
Fig.10
c
5DVD mechanism assembly
PCB holder
Fig.8
J
Deck holder
5DVD mechanism assembly
L
L
Fig.11
L
d
d
J
Fig.9
(No.MB556)1-9
3.1.6 Removing the front cabinet assembly
(See Figs.12 to 14)
• Remove the top cabinet, the rear cabinet, the AMP board and
5DVD mechanism assembly.
(1) From the top side of the main body, remove the one screw
M attaching the earth wires on the bottom cabinet. (See
Fig.12)
(2) From the both side of the main body, remove the two
screws N attaching the front cabinet assembly. (See
Fig.13)
(3) From the both and bottom side of the main body, disen-
gage the two hooks e and one hook f and remove the front
cabinet assembly from the main body in the direction of the
arrow. (See Fig.13, 14)
Front cabinet assembly
Bottom cabinet
M
Fig.12
Front cabinet assembly
Bottom cabinet
(both side)
Fig.13
Front cabinet assembly
f
Fig.14
e
N
1-10 (No.MB556)
3.1.7 Removing the front VFD board
(See Fig.15)
• Remove the top cabinet, the rear cabinet, the AMP board,
5DVD mechanism assembly and the front cabinet assembly.
(1) From the inside of the front cabinet assembly, remove the
four screws P attaching the front VFD board.
(2) Take out the front VFD board from the front cabinet assem-
bly and disconnect the card wire from the connector
on the forward side of the front VFD board.
FW102
Front VFD board
Front cabinet assembly
P
P
FW102
Fig.15
(No.MB556)1-11
3.1.8 Removing the front key board
(See Fig.16, 17)
• Remove the top cabinet, the rear cabinet, the AMP board,
5DVD mechanism assembly, the front cabinet assembly and
the front VFD board.
(1) From the inside of the front cabinet assembly, remove the
seven screws Q attaching the front key board. (See Fig.16)
(2) Release the two claws g and the four claws h and then re-
move the front key board from the front cabinet assembly.
(See Fig.16)
(3) Remove the knobs from the front side simultaneously. (See
Fig.17)
(4) Take out the front key board while lifting it from the front
cabinet assembly little by little.
3.1.9 Removing the phone board
(See Fig.16)
• Remove the top cabinet, the rear cabinet, the AMP board,
5DVD mechanism assembly and front cabinet assembly.
(1) From the inside of the front cabinet assembly, remove the
three screws R attaching the phone board.
(2) Take out the phone board from the front cabinet assembly.
Front key board
Q
h
g
Q
R
Fig.16
Knob
Front cabinet assembly
Fig.17
Phone board
1-12 (No.MB556)
3.1.10 Removing the jog LED board, volume LED board and USB LED board
(See Fig.18)
• Remove the top cabinet, the rear cabinet, the AMP board, the
5DVD mechanism assembly, the front cabinet assembly, the
front VFD board and the front key board.
(1) From the front side of the front key board, release the ten
claws j and remove the jog LED board, the volume LED
board and the USB LED board from the front key board.
(2) Disconnect the wires from the connectors FW202
of the front key board.
FW204
(3) Take out the jog LED board, volume LED board and USB
LED board from the front key board.
, FW203,
j
j
FW202 FW203
j
USB LED board
Front key board
FW204
Jog LED
board
Volume LED
board
j
j
Fig.18
(No.MB556)1-13
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.
1-14 (No.MB556)
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.MB556)1-15
Victor Company of Japan, Limited
Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MB556)
Printed in Japan
VPT
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