Hitachi DVP-415-U Service Manual
SERVICE MANUAL
TK No.9103E
DV-P415U
CONTENTS
1. Precautions
2. Product Specifications
3. Operating Instructions
4. Disassembly and Reassembly
5. Troubleshooting
6. Exploded Views
7. Replacement Parts List
8. Block Diagrams
9. PCB Diagrams
10. Wiring Diagram
11. Schematic Diagram
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
DVD PLAYER
2001March
Digital Media Products Division, Tokai
1-1
1. Precautions
1-1 Safety Precautions
1) Before returning an instrument to the customer,
always make a safety check of the entire
instrument, including, but not limited to, the
following items:
(1) Be sure that no built-in protective devices are
defective or have been defeated during servicing.
(1)Protective shields are provided to protect both
the technician and the customer. Correctly replace
all missing protective shields, including any
remove for servicing convenience.
(2)When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place
all protective devices, including, but not limited to,
nonmetallic control knobs, insulating fish papers,
adjustment and compartment covers/shields, and
isolation resistor/capacitor networks. Do not
operate this instrument or permit it to be operated
without all protective devices correctly installed
and functioning.
(2) Be sure that there are no cabinet openings
through which adults or children might be able to
insert their fingers and contact a hazardous
voltage. Such openings include, but are not limited
to, excessively wide cabinet ventilation slots, and
an improperly fitted and/or incorrectly secured
cabinet back cover.
(3) Leakage Current Hot Check-With the instrument
completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use a
isolation transformer during this test.) Use a
leakage current tester or a metering system that
complies with American National Standards
institute (ANSI) C101.1 Leakage Current for
Appliances and Underwriters Laboratories (UL)
1270 (40.7). With the instrument's AC switch first in
the ON position and then in the OFF position,
measure from a known earth ground (metal water
pipe, conduit, etc.) to all exposed metal parts of
the instrument (antennas, handle brackets, metal
cabinets, screwheads, metallic overlays, control
shafts, etc.), especially any exposed metal parts
that offer an electrical return path to the chassis.
Any current measured must not exceed 0.5mA.
Reverse the instrument power cord plug in the
outlet and repeat the test. See Fig. 1-1.
Any measurements not within the limits specified
herein indicate a potential shock hazard that must
be eliminated before returning the instrument to
the customer.
Fig. 1-1 AC Leakage Test
(4) Insulation Resistance Test Cold Check-(1) Unplug
the power supply cord and connect a jumper wire
between the two prongs of the plug. (2) Turn on the
power switch of the instrument. (3) Measure the
resistance with an ohmmeter between the
jumpered AC plug and all exposed metallic cabinet
parts on the instrument, such as screwheads,
antenna, control shafts, handle brackets, etc.
When an exposed metallic part has a return path
to the chassis, the reading should be between 1
and 5.2 megohm. When there is no return path to
the chassis, the reading must be infinite. If the
reading is not within the limits specified, there is
the possibility of a shock hazard, and the
instrument must be re-pared and rechecked before
it is returned to the customer. See Fig. 1-2.
Fig. 1-2 Insulation Resistance Test
DEVICE
UNDER
TEST
(READING SHOULD
NOT BE ABOVE
0.5mA)
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
TEST ALL
EXPOSED METER
SURFACES
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
2-WIRE CORD
Antenna
Terminal
Exposed
Melal Part
ohm
ohmmeter
Precautions
1-2
2) Read and comply with all caution and safety related notes non or inside the cabinet, or on the
chassis.
3) Design Alteration Warning-Do not alter of add to
the mechanical or electrical design of this
instrument. Design alterations and additions,
including but not limited to, circuit modifications and
the addition of items such as auxiliary audio output
connections, might alter the safety characteristics
of this instrument and create a hazard to the user.
Any design alterations or additions will make you,
the service, responsible for personal injury or
property damage resulting therefrom.
4) Observe original lead dress. Take extra care to
assure correct lead dress in the following areas:
(1) near sharp edges, (2) near thermally hot parts
(be sure that leads and components do not touch
thermally hot parts), (3) the AC supply, (4) high
voltage, and (5) antenna wiring. Always inspect in
all areas for pinched, out-of-place, or frayed wiring,
Do not change spacing between a component and
the printed-circuit board. Check the AC power cord
for damage.
5) Components, parts, and/or wiring that appear to
have overheated or that are otherwise damaged
should be replaced with components, parts and/ or
wiring that meet original specifications.
Additionally, determine the cause of overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.
6) Product Safety Notice-Some electrical and
mechanical parts have special safety-related
characteristics which are often not evident from
visual inspection, nor can the protection they give
necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc.
Parts that have special safety characteristics are
identified by shading, an ( )or a ( )on
schematics and parts lists. Use of a substitute
replacement that does not have the same safety
characteristics as the recommended replacement
part might created shock, fire and/or other hazards.
Product safety is under review continuously and
new instructions are issued whenever appropriate.
Precautions
1-3
1-2 Servicing Precautions
CAUTION : Before servicing Instruments covered
by this service manual and its supplements, read and
follow the Safety Precautions section of this manual.
Note : If unforseen circument create conflict between
the following servicing precautions and any of the
safety precautions, always follow the safety
precautions. Remember: Safety First.
1-2-1 General Servicing Precautions
(1) a. Always unplug the instrument's AC power cord
from the AC power source before (1) re-moving
or reinstalling any component, circuit board,
module or any other instrument assembly, (2)
disconnecting any instrument electrical plug or
other electrical connection, (3) connecting a test
substitute in parallel with an electrolytic
capacitor in the instrument.
b.Do not defeat any plug/socket B+ voltage
interlocks with which instruments covered by this
service manual might be equipped.
c. Do not apply AC power to this instrument and
/or any of its electrical assemblies unless all
solid-state device heat sinks are correctly installed.
d. Always connect a test instrument's ground lead
to the instrument chassis ground before
connecting the test instrument positive lead.
Always remove the test instrument ground lead
last.
Note : Refer to the Safety Precautions section ground
lead last.
(2) The service precautions are indicated or printed
on the cabinet, chassis or components. When
servicing, follow the printed or indicated service
precautions and service materials.
(3) The components used in the unit have a specified
flame resistance and dielectric strength.
When replacing components, use components
which have the same ratings. Components ientified by shading, by( ) or by ( ) in the circuit
diagram are important for safety or for the
characteristics of the unit. Always replace them
with the exact replacement components.
(4) An insulation tube or tape is sometimes used and
some components are raised above the printed
wiring board for safety. The internal wiring is
sometimes clamped to prevent contact with
heating components. Install such elements as they
were.
(5) After servicing, always check that the removed
screws, components, and wiring have been installed correctly and that the portion around the
serviced part has not been damaged and so on.
Further, check the insulation between the blades
of the attachment plug and accessible conductive
parts.
1-2-2 Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet
and turn the power ON. Connect the insulation resistance meter (500V) to the blades of the attachment
plug. The insulation resistance between each blade of
the attachment plug and accessible conductive
parts(see note) should be more than 1 Megohm.
Note : Accessible conductive parts include metal
panels, input terminals, earphone jacks, etc.
Precautions
1-4
1-3 ESD Precautions
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be
damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive Devices(ESD). Examples of typical
ESD devices are integrated circuits and some fieldeffect transistors and semiconductor chip
components. The following techniques should be used
to help reduce the incidence of component damage
caused by static electricity.
(1) Immediately before handling any semiconductor
component or semiconductor-equipped assembly,
drain off any electrostatic charge on your body by
touching a known earth ground. Alternatively,
obtain and wear a commercially available
discharging wrist strap device, which should be
removed for potential shock reasons prior to
applying power to the unit under test.
(2) After removing an electrical assembly equipped
with ESD devices, place the assembly on a
conductive surface such as aluminum foil, to
prevent electrostatic charge buildup or exposure of
the assembly.
(3) Use only a grounded-tip soldering iron to solder or
unsolder ESD devices.
(4) Use only an anti-static solder removal devices.
Some solder removal devices not classified as
"anti-static" can generate electrical charges
sufficient to damage ESD devices.
(5) Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESD devices.
(6) Do not remove a replacement ESD device from its
protective package until immediately before your
are ready to install it.(Most replacement ESD
devices are packaged with leads electrically
shorted together by conductive foam, aluminum
foil or comparable conductive materials).
(7) Immediately before removing the protective ma-
terials from the leads of a replacement ESD
device, touch the protective material to the chassis
or circuit assembly into which the device will be
installed.
CAUTION : Be sure no power is applied to the ch-
assis or circuit, and observe all other safety
precautions.
(8) Min imi ze bodily motions when handling
unpackaged replacement ESD devices. (Otherwise
harmless motion such as the brushing together of
your clothes fabric or the lifting of your foot from a
carpeted floor can generate static electricity
sufficient to damage an ESD device).
Precautions
1-5
1-4 Handling the optical pick-up
The laser diode in the optical pick up may suffer
electrostatic breakdown because of potential static
electricity from clothing and your body.
The following method is recommended.
(1) Place a conductive sheet on the work bench (The
black sheet used for wrapping repair parts.)
(2) Place the set on the conductive sheet so that the
chassis is grounded to the sheet.
(3) Place your hands on the conductive sheet(This
gives them the same ground as the sheet.)
(4) Remove the optical pick up block
(5) Perform work on top of the conductive sheet. Be
careful not to let your clothes or any other static
sources to touch the unit.
♦ Be sure to put on a wrist strap grounded to the
sheet.
♦ Be sure to lay a conductive sheet made of copper
etc. Which is grounded to the table.
Fig.1-3
(6) Short the short terminal on the PCB, which is in-
side the Pick-Up ASS'Y, before replacing the PickUp. (The short terminal is shorted when the PickUp Ass'y is being lifted or moved.)
(7) After replacing the Pick-up, open the short
terminal on the PCB.
THE UNIT
WRIST-STRAP
FOR GROUNDING
1M
1M
CONDUCTIVE SHEET
Precautions
1-6
1-5-1 Disassembly
1) Remove the power code.
2) Disassemble the Deck-Assy.
3) Solder land 4 points short on Pick-up.(See Fig. 1-4)
4) Disassembly the Pick-up.
1-5-2 Assembly
1) Replace the Pick-up.
2) Remove the soldering 4 points on Pick-up.
3) Reassemble the Deck-Assy.
PICK-UP ASS'Y
CD
DVD
SOLDER LAND
4 POINTS SHORT
Note : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged.
Fig. 1-4
1-5 Pick-up disassembly and reassembly
2-1
2. Product Specifications
Power Requirements AC 120V, 60Hz
Power Consumption 15W
GENERAL
Weight 2.7kg
Dimensions W 430mm X D 240mm X H 79mm
Operating Temperature Range +5°C ~ +35°C
Operating Humidity Range 10% to 75%
DVD Reading Speed : 3.49 m/s
(Digital Versatile Disc) Approx. Play Time (Single Sided, Single Layer Disc) : 135 min.
CD : 12Cm Reading Speed : 1.2 to 1.4 m/s
DISC
(Compact Disc) Maximum Play Time : 74min.
CD : 8Cm Reading Speed : 1.2 to 1.4 m/s
(Compact Disc) Maximum Play Time : 20min.
VCD : 12Cm
Reading Speed : 1.2 to 1.4 m/s
Maximum Play Time : 74min. (Video + Audio)
Composite Video 1 channel : 1.0Vp-p (75ohm load)
Y : 1.0Vp-p (75ohm load)
Video Output
Component Video Pr : 0.70Vp-p (75ohm load)
Pb : 0.70Vp-p (75ohm load)
S-Video
Luminance Signal : 1Vp-p (75ohm load)
Chrominance Signal : 0.286Vp-p (75ohm load)
2 Channel L (1/L), R (2/R)
* Frequency Response
48kHz Sampling : 4Hz to 22kHz
Audio Output
96kHz Sampling : 4Hz to 44kHz
* S/N Ratio 110dB
* Dynamic Range 100dB
* Total Harmonic Distortion 0.004%
* : Nominal specification
3-1
3. Operating Instructions
14
POWER/STANDBY
When the unit is first plugged in, the indicator lights. When POWER/STANDBY is
pressed, the lamp goes out and the player is turned on.
DISC TRAY
••Press OPEN/CLOSE to open and close the disc tray.
DISPLAY
• Operation indicators are displayed here.
OPEN/CLOSE
• Press to open and close the disc tray.
(PLAY/PAUSE)
• Begin or pause disc play.
(STOP)
• Stops disc play.
(SKIP/SEARCH)
• Use to skip a scene or music.
• If this button is held down for approx. two seconds, it will switch to the search button:
Thereafter, each time the button is pressed, the search speed will switch to 2X, 4X,
8X, 16X, 32X, 128X, after which SKIP will be restored.
Description-Front Panel
Front Panel Controls
15
You can now select different viewing points of the scene recorded by different
cameras (Multi Angle).
Disc type indicators
Reverse playback / Pause / Forward playback
Lights when 3D sound is turned on.
DVD : Title number
DVD : Chapter number.
Video/Audio CD : Track number
Repeat play mode
Linear PCM audio output
Dolby Digital audio output
DTS (Digital Theater System) audio output(Digital only)
MPEG-2 Audio output
Displays various messages concerning operations such as PLAY, STOP, LOAD,
RANDOM, ...
no DISC : No disc loaded.
OPEN : The disc tray is open.
LOAD : Player is loading disc information.
Front Panel Display
Front Panel Display
Œ
´
ˇ
¨
ˆ
Ø
∏
”
’
˝
Ô
Ò
POWER/STANDBY
Operating Instructions
3-2
How to handle the remote control
16
Tour of the Remote Control
• Operate the remote control within the following area, in a straight line from the signal
detecting eye of the player and an angle of 30°.
30
Aprox.7metros
30
30
30
17
POWER/STANDBY Button
• Turns the player on and off.
A-B REPEAT Button
• Marks a segment to repeat between A and B.
REPEAT Button
•Allows you to repeat play a title, chapter, track, or disc.
MODE Button
• Allows you to program a specific order.
RETURN Button
• Returns to a previous menu.
ANGLE Button
•Accesses various camera angles on a disc.
SUBTITLE Button
•Accesses various subtitles on a disc.
MENU Button
• Brings up the Menu on a disc.
ENTER/DIRECTION Button (UP/DOWN or LEFT/RIGHT Button)
DISC NAVIGATION Button
• To view the first picture of each chapter(DVD) or track(VCD).
STEP Button
•Advances playback one frame at a time.
STOP Button
• To stop playback.
SEARCH Buttons
•Allows you to search forward/backward through a disc.
TV POWER Button
• To turn the TV on and off.
VIDEO/TV Button
• To select the input: VIDEO (DVD player) or TV.
SURROUND Button
• To activate the 3D sound.
BOOKMARK Button
• To rapidly return to a location of disc.
OPEN/CLOSE Button
• To open or close the disc tray.
NUMBER Buttons
ZOOM Button
• To magnify part of picture.
CLEAR Button
• Removes menus or status displays from the screen.
DISPLAY Button
• Displays the current disc mode.
AUDIO Button
•Accesses various audio functions on a disc.
TOP MENU Button
• Brings up the Top Menu on a disc.
SETUP Button
• Brings up the DVD player’s Setup menu.
SKIP Buttons
• Skip the, Chapter, or Track.
PLAY/PAUSE Button
• Begin/Pause disc play.
VOL Buttons
• To adjust the TV volume.
CH Buttons
• To switch TV channels.
Tour of the Remote Control
DVD Function Buttons
DV-RM410
Œ
´
ˇ
¨
ˆ
Ø
∏
”
’
˝
Ô
Ò
Ú
Æ
ı
˜
¯
˘
¿
¸
˛
◊
±
≠
–
—
÷
®
Operating Instructions
3-3
22
DIGITALAUDIO OUT JACK
• Use either an optical or coaxial digital
cable to connect to a compatible
Dolby Digital receiver. Use to connect
to an A/V Amplifier that contains a
Dolby Digital decoder or DTS
decoder.
MIXED AUDIO OUT JACKS
• Connect to the Audio input jacks of
your television, audio/video receiver.
VIDEO OUT JACK
• Use a video cable to connect one of
the jack to the Video input on your
television.
S-VIDEO OUT JACK
• Use the S-Video cable to connect this
jack to the S-Video jack on your
television for a higher quality picture.
The S-Video must be selected in the
VIDEO OUT SELECT switch.
COMPONENT VIDEO OUT JACKS
• Use these jacks if you have a TV with
Component Video in jacks. These
jacks provide Pr, Pb and Y video.
Along with S-Video, Component Video
provides the best picture quality. The
Y, Pb, Pr must be selected in the
VIDEO OUT SELECT switch.
VIDEO OUT SELECT switch
• Use the switch to set video out.
• If the Y, Pb or Pr is selected, the S-
Video may not work.
• If the S-Video is selected, the Y, Pb or
Pr may not work.
Description-Rear Panel
Rear Panel
COMPONENT VIDEO OUT
YPr
Pb
VIDEO OUT S-VIDEO OUT
MIXED AUDIO OUT
RL
OPTICAL COAXIAL
DIGITAL AUDIO OUT
S-VIDEO
Y,P b ,P r
VIDEO OUT
SELECT
Œ
´
ˇ
¨
ˆ
Ø
4-1
4. Disassembly and Reassembly
4-1 Cabinet and PCB
4-1-1 Top Cabinet Removal
1) Remove 3 Screws Πon the back Top Cabinet.
2) Lift up the Top Cabinet in direction of arrow.
Π3 SCREWS
Fig. 4-1 Top Cabinet Removal
Note : Reassembly in reverse order.
4-2
Disassembly and Reaasembly
4-1-2 Door-Tray Removal
1) Supply power and open Tray Œ.
2) Disassemble the Door-Tray ´ in direction of arrow "A".
3) Close Tray Πand power off.
Note : If Tray Œ doesn't open, insert a Screw driver ¨ into the Emergency hole ˇ (as shown in detailed drawing)
and then push it in the direction of arrow "B". Open Tray manually.
ΠTRAY
´ DOOR-TRAY
"A"
<Side View>
ˇ EMERGENCY HOLE
¨ SCREW DRIVER
"B"
Fig. 4-2 Door-Tray Removal
Disassembly and Reaasembly
4-3
Fig. 4-3 Ass'y Front-Cabinet Removal
4-1-3 Ass'y Front-Cabinet Removal
1) Remove Ass'y Front-Cabinet Œ.
ΠASS'Y FRONT-CABINET
4-4
Disassembly and Reaasembly
4-1-4 Ass'y Deck Removal
1) Disconnect Flat-Cable,Connect-Wire from DCN1, DCN2 on Main PCB.
2) Remove 3 Screws Πfrom the Ass'y Deck and lift it up.
Fig. 4-4 Ass'y Deck Removal
Π3 SCREWS
DECK-ASS'Y
CONNECT-WIRE
FLAT-CABLE
MAIN PCB
DCN1
DCN2
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