JVC DD-8E User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB563
2006/11
NETWORK MEDIA SYSTEM
MB563200611
DD-8B,DD-8E,DD-8EN,DD-8EV,
DD-8EE,DD-3B,DD-3E,DD-3EN,
DD-3EV,DD-3EE
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
(Only for DD-8 and DD-3)
CA-DD8
SP-DD8F SP-DD8F
SP-PWDD8
SP-DD8S
CA-DD3SP-DD3F SP-DD3F SP-PWDD3
SP-DD8S

1-2 (No.MB563)
SPECIFICATION
Main unit (CA-DD8/CA-DD3)
Subwoofer for DD-8 (SP-PWDD8)
Tuner FM frequency : 87.50 MHz - 108.00 MHz
AM frequency : 522 kHz - 1 629 kHz
Terminal (front of the main unit) Audio output headphone terminal ×1
Impedance : 16 Ωto 1 kΩ
USB digital input terminal ×1
Analog input terminal ×1
Stereo mini jack
Analog output terminal ×1
Stereo mini jack
Terminal (rear of the main unit) Optical digital input terminal ×1
-23 dBm to -15 dBm
Optical digital output terminal ×1
-23 dBm to -15 dBm
System terminal ×1
Component video output terminals (3) ×1
Y : 1.0 Vp-p, sync negative, 75 Ωterminated
PB : 0.7 Vp-p, 75 Ωterminated
PR : 0.7 Vp-p, 75 Ωterminated
Audio input terminals (2) ×1
500 mV/47 kΩ
SCART terminal ×1
AM antenna terminal ×1
FM antenna terminal ×1
Ethernet terminal
HDMI monitor output terminal
USB Compatible with USB 2.0 Full-Speed
Compatible device : Mass storage class device
Compatible file system : FAT16, FAT32
Bus power supply : Max. 500 mA
General Power source : AC 230 V , 50 Hz
Power consumption (in operation) : 25 W
Power consumption (on standby) : 0.5 W
Dimensions (W ×H ×D) : 445 mm ×55 mm ×286.4 mm (including projecting parts)
Weight : 3.5 kg (CA-DD8), 3.0 kg (CA-DD3)
Type Bass reflex type, Magnetically shielded type
Amplifier Subwoofer : 120 W at 4 Ω(110 Hz, THD 10%)
Left/right speaker : 25 W ×2 at 3 Ω(1 kHz, THD 10%)
Center surround speaker : 25 W ×2 at 3 Ω(1 kHz, THD 10%)
Speaker 16 cm cone
Power handling capacity : 120 W
Impedance : 4 Ω
Frequency range : 30 Hz - 230 Hz
Sound pressure level : 72 dB/W·m
General Power source : AC 230 V , 50 Hz
Power consumption : 120 W
Dimensions (W ×H ×D) : 242 mm ×364 mm ×363 mm
Weight : 12.6 kg

(No.MB563)1-3
Subwoofer for DD-3 (SP-PWDD3)
Left and right speakers forDD-8 (SP-DD8F)
Left and right speakers forDD-3 (SP-DD3F)
Center surround speaker for DD-8/DD-3 (SP-DD8S)
Designs and specifications are subject to change without notice.
Type Bass reflex type
Amplifier Subwoofer : 120 W at 4 Ω(110 Hz, THD 10%)
Left/right speaker : 25 W ×2 at 3 Ω(1 kHz, THD 10%)
Center surround speaker : 25 W ×2 at 3 Ω(1 kHz, THD 10%)
Speaker 16 cm cone
Power handling capacity : 120 W
Impedance : 4 Ω
Frequency range : 30 Hz - 230 Hz
Sound pressure level : 72 dB/W·m
General Power source : AC 230 V , 50 Hz
Power consumption : 120 W
Dimensions (W ×H ×D) : 242 mm ×364 mm ×363 mm
Weight : 12.3 kg
Type 2-way 3-speaker bass reflex type, Magnetically shielded type
Speaker 8 cm cone ×2 + 2 cm dome
Power handling capacity 30 W
Impedance 3 Ω
Frequency range 60 Hz - 40 kHz
Sound pressure level 81 dB/W·m
Dimensions (W ×H ×D) 289 mm ×1 101 mm ×289 mm
Weight (1 unit) 10.0 kg
Type 2-way acoustic suspension type, Magnetically shielded type
Speaker 9.5 cm ×1 cm direct drive + 2 cm dome
Power handling capacity 30 W
Impedance 3 Ω
Frequency range 100 Hz - 40 kHz
Sound pressure level 78 dB/W·m
Dimensions (W ×H ×D) 165 mm ×376 mm ×165 mm (including stand)
Weight (1 unit) 1.0 kg (including stand)
Type 1-way acoustic suspension type, Magnetically shielded type
Speaker 9.5 cm ×1 cm direct-drive
Power handling capacity 30 W
Impedance 3 Ω
Frequency range 120 Hz - 40 kHz
Sound pressure level 79 dB/W·m
Dimensions (W ×H ×D) 344 mm ×61 mm ×76 mm (including stand)
Weight 0.95 kg (including stand)

1-4 (No.MB563)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W 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.).
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 pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MB563)1-5
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-
ment parts must be identical to those used in the original circuits.
(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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 re-assembling.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) If mains voltage selector is provided, check setting for local voltage.
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.

1-6 (No.MB563)
1.6 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.
1.6.1 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.
1.7 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.
1.8 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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Solder short land section

(No.MB563)1-7
1.9 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
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

1-8 (No.MB563)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB563)1-9
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the side panel L, R
(See Fig.1)
(1) From the bottom sides of the main body, remove the four
screws Aattaching the side panel L and side panel R.
(2) Remove the side panel L and side panel R.
Fig.1
Side panel RSide panel L
A
A

1-10 (No.MB563)
3.1.2 Removing the top cover
(See Figs. 2 to 9)
• Remove the side panel L and side panel R.
(1) From the left and right side of the main body, remove the
two screws Band two screws B' (See Figs.2 and 3)
Reference:
When attaching the screws B', attach the earth wires
with them. (See Figs. 2 and 3)
(2) From the back side of the main body, remove the two
screws Cattaching the rear panel. (See Fig.4)
(3) Insert the minus driver a space aof the door arm to the
front base. (See Fig.5)
(4) Moving the minus driver in the direction of the arrow. (See
Fig.5)
(5) Take out the door from the front base in the direction of the
arrow. (See Fig.6)
(6) Remove the two screws Dattaching the top cover. (See
Fig.7)
(7) From the top side of the main body, open the top panel in
the direction of the arrow. (See Fig.8)
(8) From front side of the main body, disconnect the card wire
from the connector CN451 on the main board. (See Fig.9)
(9) Remove the top cover.
Fig.2
Fig.3
Fig.4
Fig.5
Top cover
B' B
Top cover
B' B
Rear panel
C
Top cover
Front base Door arm
a

(No.MB563)1-11
Fig.6
Fig.7
Fig.8
Fig.9
Front base Door
Front base
Top cover
D
Top cover
Top cover
Main board
CN451

1-12 (No.MB563)
3.1.3 Removing the front base
(See Fig.10)
• Remove the side panel L, side panel R and top cover.
(1) From the bottom side of the main body, remove the four
screws Eattaching the front base.
(2) Release the joint bof the front base and then remove in the
direction of the arrow.
Fig.10
Front base
E
b
E

(No.MB563)1-13
3.1.4 Removing the audio board
(See Figs.11 and 12)
• Remove the side panel L, side panel R, top cover and front
base.
(1) From the back side of the main body, remove the screw F
and three screws Gattaching the audio board to the rear
panel. (See Fig.11)
(2) From top side of the main body, remove the two screws H
attaching the holder. (See Fig.12)
(3) Take out the holder from the main body in the direction of
the arrow. (See Fig.12)
(4) Disconnect the connector CN202 on the audio board from
the main board. (See Fig.12)
(5) Disconnect the wire from the connector CN204 on the au-
dio board. (See Fig.12)
(6) Disconnect the card wire from the connector CN201 on the
audio board. (See Fig.12)
(7) Remove the audio board and then disconnect the wire from
the connector CN421 on the main board. (See Fig.12)
(8) Take out the audio board from the main body.
Fig.11
Fig.12
Rear panel
F
G
CN421
Audio board
Main board CN202 CN204
HH
CN201
Holder

1-14 (No.MB563)
3.1.5 Removing the tuner
(See Figs.13 and 14)
• Remove the side panel L, side panel R, top cover, front base
and audio board.
(1) From the top side of the main body, disconnect the card
wire from the connector CN441 on the main board. (See
Fig.13)
(2) From the back side of the main body, remove the two
screws Jattaching the tuner to the rear panel and then take
out the tuner. (See Fig.14)
Fig.13
Fig.14
Tune
r
CN441Main board
J
Rear panel

(No.MB563)1-15
3.1.6 Removing the rear panel
(See Fig.15)
• Remove the side panel L, side panel R, top cover, front base,
audio board and tuner.
(1) From the back side of the main body, remove the eight
screws K, screw Mand Nattaching the rear panel.
(2) Release the two joints cof the rear panel.
(3) Take out the rear panel from the main body.
Fig.15
3.1.7 Removing the LAN board assembly
(See Figs.16 and 17)
• Remove the side panel L, side panel R, top cover, front base,
audio board, tuner and rear panel.
(1) From the top side of the main body, remove the two screws
Pattaching the LAN board assembly. (See Fig.16)
(2) Disconnect the wire from the connector on the LAN board
assembly. (See Fig.16)
(3) Lift up the LAN board assembly and then disconnect the
card wire from the connector CN351 on the DVD board.
(See Fig.17)
(4) Take out the LAN board assembly from the main body.
CAUTION:
The connector CN351 is easy to broken when release the lock
of connector.
Fig.16
Fig.17
Rear panel MN
cc
K
Connecter
LAN board assembly
P
DVD assembry
Q

1-16 (No.MB563)
3.1.8 Removing the DVD assembly
(See Figs.18 and 19)
• Remove the side panel L, side panel R, top cover, front base,
audio board, tuner, rear panel and LAN board assembly.
(1) From the right side of the main body, remove the two
screws Qattaching the DVD assembly. (See Fig.18)
(2) From the top side of the main body, remove the screw R
and screw Sattaching the DVD assembly. (See Fig.19)
Reference:
When removing the screw R, use a screwdriver shown
as follows.
TORX Driver: size T10
Parts number: DR-L70
(3) Disconnect the card wires from connectors (CN471,
CN472, CN473) on the main board. (See Fig.19)
(4) Disconnect the wire from connector CN704 on the DVD as-
sembly. (See Fig.19)
(5) Take out the DVD assembly from the main body.
Fig.18
Fig.19
LAN board assembly
DVD board CN351
CN473
R
S
CN472
CN704
CN471 DVD assembly
Main board

(No.MB563)1-17
3.1.9 Removing the DVD board
(See Fig.20)
• Remove the DVD assembly.
(1) From the bottom side of the DVD assembly, disconnect the
card wires from the connectors (CN101, CN1201) on the
DVD board.
(2) Remove the screw Tattaching the DVD board to the DVD
assembly. (See Fig.20)
(3) Take out the DVD board.
Fig.20
DVD assembly
T
CN101 CN201 DVD board

1-18 (No.MB563)
3.1.10 Removing the jack board
(See Fig.21)
• Remove the side panel L, side panel R, top cover, front base,
audio board and LAN board assembly.
(1) From the top side of the main body, remove the screw Uat-
taching the jack board.
(2) Disconnect the wire from the connector CN704 on the DVD
board.
(3) Take out the jack board from the main body.
3.1.11 Removing the main board
(See Fig.21)
• Remove the side panel L, side panel R, top cover, front base,
audio board, tuner, rear panel, LAN board assembly and jack
board.
(1) From the top side of the main body, remove the screw V
and screw V' attaching the main board.
Reference:
When attaching the screw V', attach the earth wire with
it. (See Fig. 21)
(2) Disconnect the card wires from the connectors (CN461,
CN463, CN471, CN472, CN473) on the main board.
(3) Disconnect the wire from the connector CN901 on the main
board.
(4) Take out the main board from the main body.
Fig.21
CN461
V'
V
U
CN901 CN463
CN704
CN471
CN473
CN472
Main board
Jack board
DVD board

(No.MB563)1-19
3.1.12 Removing the power supply board
(See Fig.22)
• Remove the side panel L, side panel R, top cover, front base,
audio board, tuner and rear panel.
(1) From the top side of the main body, disconnect the wire
from the connector CN901 on the main board.
(2) Disconnect the power code from the connector CN991 on
the power supply board.
(3) Remove the three screws Wand screw W' attaching the
power supply board.
Reference:
When attaching the screw W', attach the barrier with it.
(4) Remove the screw Xattaching the earth wire to the main
body.
Reference:
When attaching the screw X, attach the earth wire with it.
(5) Take out the power supply board from the main body.
3.1.13 Removing the video board
(See Fig.22)
• Remove the side panel L, side panel R, top cover, front base,
audio board, tuner and rear panel.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN601, CN603) on the video
board.
(2) Take out the video board from the main body in the direc-
tion of the arrow.
Fig.22
CN991
Power supply board
CN603
W
WW'
CN601CN901
Video board
X

1-20 (No.MB563)
3.1.14 Removing the FL board
(See Fig.23)
• Remove the side panel L, side panel R and top cover.
(1) From the bottom side of the top cover, remove the two
screws Yattaching the top cover.
(2) Disconnect the wire from the connector CN562 on the FL
board.
(3) Take out the FL board from the top cover.
Fig.23
3.1.15 Removing the key board
(See Fig.24)
• Remove the side panel L, side panel R, top cover and FL
board.
(1) From the bottom side of the top cover, release the two
joints dattaching the key board.
(2) Remove the three screws Zand then take out the key
board from the top cover.
Fig.24
FL boardCN562
Y
Top cover
Key board
Z
d