Hitachi DV-W1U User Manual

SERVICE MANUAL

TK No.9006E

DV-W1U

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

DVD PLAYER . CD RECORDER

2000May

Digital Media Products Division, Tokai

SAFETY PRECAUTIONS

NOTICE:

Comply with all cautions and safety related notes
located on or inside the cabinet and on the chassis.

1. When replacing a chassis in the instrument, all the
protective devices must be put back in place, such as
barriers, non-metallic knobs, adjustment and
compartment covers/shields, isolation resistors/
capacitors, etc.

2. When service is required, observe the original lead­ress. Extra precautions should be taken to assure
correct lead dress in the high voltage circuit.

3. Always use the manufacturer's replacement
components. Especially critical components as
indicated on the circuit diagram should not be
replaced by other manufacturer's. Furthermore,
where a short-circuit has occurred, replace those
components that indicate evidence of overheating.

4. Before returning an instrument to the customer, the
service technician must thoroughly test the unit to be
certain that it is completely safe to operate without
danger of electrical shock, and be sure that no
protective device built into the instrument by the
manufacturer has become defective or inadvertently
defeated during servicing. Therefore, the following
checks should be performed for the continued
protection of the customer and service technician.

Leakage Current Cold Check

With the AC plug removed from the AC120V, 60Hz
source, place a jumper across the two plug prongs.
Turn the AC power switch on. Using an insulation
tester (DC500V), connect one lead to the jumpered
AC plug and touch the other lead to exposed metal
parts (antennas, screwheads, metal overlays,
control shafts, etc.), particularly any exposed metal part
having a eturn path to the chassis. Exposed metal
parts having a return path to the chassis should have a
minimum resistor reading of 0.3 Mohm and a maximum
resistor reading of 5 Mohm. Any resistor value below
or above this range indicates an abnormality which
requires corrective action. Exposed metal parts not
having a return path to the chassis will indicate an open
circuit.

Leakage Current Hot Check

Plug the AC line cord directly into a AC120V, 60Hz
outlet (do not use an isolation transformer for this
check).
Turn the AC power switch on. Using a "Leakage
Current Tester", measure for current from all
exposed metal parts of the cabinet (antennas,
screwheads, metal overlays, control shaft, etc.),
particularly an exposed metal part having a return
path to the chassis, to a known ground (earth) (water
pipe, conduit, etc.). Any current measured must not
exceed 0.5 mA.

LEAKAGE CURRENT
TESTER

(READING
SHOULD NOT
BE ABOVE

0.5mA)

DEVICE
UNDER TEST

TEST ALL EXPOSED
METAL SURFACES

2-WIRE CORD

ALSO TEST WITHPLUG
REVERSED(USING AC
ADAPTER PLUG AS
REQUIRED)

GROUND
(EARTH)

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED
BEFORE RETURNING THE UNIT TO THE CUSTOMER.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts have special safety­related characteristics. These are often not evident from
visual inspection nor can the protection afforded by them
necessarily be obtained by using replacement
components rated for a higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this Service Manual.
Electrical components having such features are identified
by marking with a
in this Service Manual. The use of a substitute
replacement component which does not have the same
safety characteristics as the HITACHI recommended
replacement one, shown in the parts list in this Service
Manual, may create shock, fire, or other hazards. Product
safety is continuously under review and new instructions
are issued from time to time. For the latest information,
always consult the current HITACHI Service Manual. A
subscription to, or additional copies for, HITACHI Service
Manual may be obtained at a nominal charge from
HITACHI SALES CORPORATION.

on the schematics and the parts list

Notes When Using Service Manual

The following shows the contents to be noted when using service manual:

1. Value units used in parts list

Certain symbols are indicated below for value units of
resistors, capacitors and coils in parts list. When you read
them note the following regular indications:

Parts

Resistor

Capacitor

Coil

Indication in list Regular indication

...........................................

KOHM

.................................................

UF

.................................................

PF

.................................................

UH

...............................................

MH

k

µF

pF

µH

mH

2. Values in schematic diagrams

The values, dielectric strength (power capacitance) and
tolerances of the resistors (excluding variable resistors)
and capacitors are indicated in the schematic diagrams
using abbreviations.

[Resistors]

Item

Value

Tolerance

Power

capacitance

Indication

No indication

...................................................

K

..................................................

M

No indication

(All tolerances other than ±5% are

indicated in schematic diagrams)

No indication

(1/16W for leadless resistors without

indication)

All capacitances other than the above

are indicated in schematic diagrams.

...................................

.............................

............................

±5%

1/8W

k

M

3. Identifications of sides A/B in
circuit board diagrams

1) Board having a pattern on one side and parts on
both sides.
Side A: Shows discrete parts, viewed from the

pattern side.

Side B: Shows leadless parts, viewed from the

pattern side.

2) Board having patterns on both sides and parts on
both sides.
Side A: Shows parts and patterns which can be

seen when the case is opened.

Side B: Shows parts and the pattern on the back of

side A.

4. Table for indexing locations of parts

This table shows locations of each part on circuit board
diagrams. The locations are indicated using the guide
scales on the external lines of diagrams.

1) One diagram indicated for each board

Symbol

No.

IC

IC1201

Circuit No.

2) Two diagrams indicated for each board

Parts

Location

Type of part

2 A

Zone "A" on board diagram

Zone "2" on board diagram

[Capacitors]

Item

Value

Dielectric

strength

[Coils]

Item

Value

Indication

No indication

...................................................

P

No indication

(All dielectric strengths other than 50V

are indicated in schematic diagrams)

Indication

....................................................

µ

..................................................

m

.................................

..............................

µF

pF

50V

µH

mH

Symbol

No.

IC

IC1201

Circuit No.

A: Shows side A
B: Shows side B

Parts

Location

Type of part

A - 2 A

Zone "A" on board
diagram
Zone "2" on board
diagram

CONTENTS

CHAPTER 1 GENERAL INFORMATION

1. Specifications

2. Comparison with Previous Model

3. Troubleshooting

3-1. VIDEO CIRCUIT

3-2. AUDIO CIRCUIT

3-3. RECORDER AUDIO CIRCUIT

4. Instructions on Use

CHAPTER 2 DISASSEMBLY

1. Before Starting Disassembly

2. Disassembly Method

Parts Hierarchy Chart

Disassembly Procedure Diagrams

2-1. Side cover(L),(R) and Top cover

2-2. Rear panel

2-3. JAK and REG board

2-4. Front cover, IF, FLHP,

2-5. DVD-ROM and DEC board

2-6. CD-R and Bottom cover

.............................................................

...............................

..........................................................

....................................................

....................................................

..............................

.....................................................

......................................

..................................................

.................................................

.............................

...........................

.............................................................

..............................................

SW-DVD and SW-CDR board

....................................

........................................

..............

1-1

1-2

1-4

1-4

1-5

1-6

1-7

2-1

2-1

2-1

2-2

2-2

2-2

2-3

2-3

2-4

2-4

CHAPTER 3 EXPLODED VIEW

1. CABINET SECTION

CHAPTER 4 REPLACEMENT PARTS LIST

1. MECHANICAL PARTS LIST

2. ELECTRICAL PARTS LIST

CHAPTER 5

CONNECTION DIAGRAM

SCHEMATIC/CIRCUIT

LCD DISPLAY[FLPH]

DVD SWITCH[SW-DVD]

CDR SWITCH[SW-CDR]

INTERFACE[IF]

REAR JACK[JAK]

REGURATOR[REG]

DECK-1[DEC]

DECK-2[DEC]

...................................................

......................................

........................................

SCHEMATIC, CIRCUIT BOARD

AND BLOCK DIAGRAMS

..............................................

BOARD

.........................................

.....................................

....................................

..................................................

...............................................

...........................................

..................................................

..................................................

5-3 / 5-25

5-5 / 5-20

5-5 / 5-20

5-6 / 5-23

5-7 / 5-21

5-9 / 5-23

5-11 / 5-16

5-13 / 5-16

3-1

4-1

4-1

5-1

BLOCK DIAGRAM

........................................................

5-27

CHAPTER 1

1. Specifications

GENERAL INFORMATION

General

Component video output

S Video output terminal

Video output

Audio output

Operating Laser

................................................................................................

Power supply
Power consumption
Stand-by power consumption
Weight
Overall size
Allowable operating temperature
Allowable operating humidity
Y output level
P
PAL
P
PAL
Output terminal
Y output level
C output level NTSC

Output terminal
Output level
Output terminal
OUTPUT level
Mixed 2ch OUTPUT

5.1 ch OUTPUT
Sound characteristics

............................................................................................................

B output level NTSC

R output level NTSC

PAL

.......................

...................................................................................

.........................................................................................

....................................................................

.................................................................................

...............................................................

..............................................................

...............................................................

..............................................................

............................................................................................

.................................................................................

............................................................

..................................................................

........................................................................................

....................................

............................................................................................

...............................................................

............................................................

...................................................................

Semi-conductor laser: Wave length 650nm (DVD)

.........................................................................

........................................................

........................................

1 Vp-p (synchronous when loaded at 75 ohm)

780nm (CD,VCD)

AC120V, 60Hz

27W

3.5W

4.8kg

435(W)×330(D)×81(H)mm

+5°C~+35°C

15~75%(no condensation)

1 Vp-p (75 ohm)

0.7 Vp-p (75 ohm)

0.698 Vp-p (75 ohm)

0.7 Vp-p (75 ohm)

0.698 Vp-p (75 ohm)
pinj ack

1 Vp-p (75 ohm)

0.286 Vp-p(75 ohm)

0.3 Vp-p (75 ohm)
S terminal

pin jack

200m Vrms (1kHz, -20dB)

1 system (pin jack × 2)
1 system (pin jack × 6)

Frequency characteristics CD: 4Hz~20kHz (EIAJ)

DVD: 4Hz~22kHz (48k sampling)

4Hz~44kHz (96k sampling)
SN ratio 110dB
Dynamic range 100dB
Total harmonic distorion rate 0.003%
Wow fluttertics Measurement limit less than

(±0.001% W.PEAK) (EIAJ)

Audio input

Other terminals

Headphone output

Accessories

Specification and exterior aspect of the model may be changed for improvements without advance notice.

Input level

1 system (pin jack × 2)

Digital Audio output Optical/Coaxial Coaxial terminal

(DTS/AC-3/MPEG2, LPCM, OFF commutable) Optical connector

Digital Audio input optical/coaxial Coaxial terminal

(DTS/AC-3/MPEG2, LPCM, OFF commutable) Optical connector

Output level

(mini jack)
Remote control unit
signal "AA" batteries
AV cord
Ferrite core

........................................................................

...................................................................................

...............................................................................................

..............................................................................................

..................................................................................................................

............................................................................................................

200mVrms (1kHz,-20dB)

15 mW, 32 ohm

.............

...........

.............

...........

1
1
1
1

1
2
1
1

1 - 1

2. Comparison with Previous Model

Dimension
Weight
Region Code
OSD languages
Playing Default
Power Requirement (Common Power Supply)
Power Consumption
Regulation
Front-End Solution(Drive)

Remote Controller

Playable Disc Type

DVD/VCD/CD-DA
CVD/SVCD/DVCD
CD-R/CD-RW
Disc Size
PAL/NTSC Disc
RAM Read

Recordable Disc Type

CD-R/CD-RW for Audio

Video

Universal Video Output Select
Video Digital to Analog Converter
Video Default
Black Level Select (0/7.5) by Setup Menu
Closed Caption for NTSC DVD
S-Video Output Connector
Component Video Output Connector (US pin)
Composite Video Output Connector
D Terminal
SCART Connector
SCART RGB Signal ON/OFF by Setup Menu
Sharpness Select by Setup Menu
Still picture selection with Setup Menu
Y-Level Control by Setup Menu
HUE Level Control by Setup Menu
Sharpness Control
(Picture Button by Remote Control)
Hue Control (Picture Button by Remote Control)

Audio

Audio Digital to Analog Converter
Audio output Connector
Digital Audio Output-Optical
Digital Audio Output-Coaxial
Headphone Jack with Volume Control
New Karaoke
Mic Jack
MPEG2 Audio Down -Mix 2ch
MPEG2 Multi channel
AC-3 Audio Down-mix 2ch
AC-3 Dolby Multi Channel output
OSD Speaker Configuration
DTS Output
Dolby Pro Logic Decode
Virtual Surround (Spatializer N-2-2) 5.1ch Source

DV-W1U

435mm(W) × 330mm(D) × 81mm(H)

4.8kg
1

3 (English,French,Spanish)

English

120V 60Hz

27W

UL/CSA/FCC

DVD:GD-2501(2-laser 2-lens)-

CD-R/RW:CRD-RA1WO2

w/ Jog/Shuttle

O/O/O

O/O/(O)

O/O

8cm/12cm

O/O

—

O/O

Auto/NTSC/PAL/PAL60

10 bit

NTSC

O
O

×1
×1
×1

—

×1

—

Sharp, Natural, Soft

Auto, Hi-Resolution, Flickerless

O
O
O

O

96kHz/24bit

2ch L/R+5.1ch

×1
×1

×1 (ø3.5 Jack)

—
—

Analog/LPCM

Digital
Analog/LPCM
Analog/Digital

—

Digital

—

Analog

DV-P250U

434mm(W) × 315mm(H) × 98mm(D)

3.9kg
1

3 (English,French,Spanish)

English

120V 60Hz

27W

UL/C-UL/FCC

GD-2501

w/o Jog/ Shuttle

O/O/O

O/O/(O)

O/O

8cm/12cm

O/O

—

—

Auto/NTSC/PAL/PAL60

10 bit

NTSC

O
O

×1
×1
×1

—
—

O

Sharp, Natural, Soft

Auto, Hi-Resolution, Flickerless

—
—
—

—

96kHz/24bit

2ch L/R+5.1ch

×1
×1

—
—
—

Analog/LPCM

Digital
Analog/LPCM
Analog/Digital

—

Digital

—

Analog

1 - 2

Virtual Surround (Wide)2ch Source
Surround Select by Remote Controller on/off
Dynamic Range Compression(only AC-3)
MP3 Read
Audio Input Connector
Digital Audio Input-Optical
Digital Audio Input-Coaxial

Playback Features

Jog/Shuttle on Front Panel
New Disc Navigation
Multi Speed Scan (Forward)

Multi Speed Scan (Reverse)

Step Mode
Parental Look (DVD)
Zoom ×2 ×4 (DVD)
Skip/Program and Random Play by Setup
Menu
Repeat

Last Play (DVD)
Easy Play (Papa-Mamma Mode)

Recording Features (for Audio CD-R/RW)

Digital high-speed dubbing
(from CD-DA to CD-R/RW)
Simple Dubbing Button
Recording Level Control for Analog Audio Input
Program Recording

Display/Operating Convenience

OSD Display On/Off User Selectable
Screen Saver
Auto Power Off
VFD Dimming Select by Setup Menu

Accessories

Remote Control Unit
Batteries 1 pair for Remote Controller
AV cable

Analog

O
O

—

O
O
O

—

1 moving video without audio

Forward 1/2,1/8, 1× (these with full-

frame); 2×(IP search); 1×, 2×, 10×,

30×, 120x (these in search)

Reverse 1×, 2×, 10×, 30×, 120×

(these in search)

Forward(full-frame), Reverse(I only)

O

O (W/ Indicater)

O

Both DVD and CDR: A-B Repeat,

DVD: Disc, Title/Chapter,

Track (with VCD/CD)

16 any discs

O

x2

O
O
O

O
O
O

Bright, Dim, Dark, Auto Dimming

O
O
O

Analog

O
O

—
—
—
—

O
O

F 1/2, 1/8, 1×, 2×, 5×, 10×, 30×

R 1×, 2×, 5×, 10×, 30×

F(Full Frame), R(I)

O
O
O

O

16 any discs

O

—

—
—
—

O
O
O
O

O
O
O

1 - 3

3. Troubleshooting

3-1. VIDEO CIRCUIT

NO IMAGE

ARE SIGNALS

OUTPUT FROM VIDEO

OUTPUT TERMINAL?

No

ARE SIGNALS

OUTPUT FROM PG2201

pins 17, 15, 13, 11, 9, 7,

3?

No

ARE SIGNALS

OUTPUT FROM

IC2202 pins 35, 33, 29,

28, 25, 24?

No

ARE SIGNALS

IC2202 pins

14, 15, 16, 20, 21?

Ye s

Ye s

Ye s

Ye s

No

CHECK SIGNAL
CABLE/ MONITOR

CHECK VIDEO OUTPUT
SECTOR (PG1302/ J1307/ J1302/
J1306/ J1361) OF JAK PWB

CHECK IC3301/ IC3302 of
JAK PWB

CHECK IC1201/ IC1101/ IC1601

+5V AT IC2202

pins 46, 34, 32, 30, 27,

19, 11, 1 (VDD)?

Ye s

IS VOLTAGE AT

IC2202 pins 44

(RESET) H LEVEL?

Ye s

IS CLOCK IN

IC2202 pin 48?

Ye s

REPLACE IC2202

No

No

No

CHECK POWER
SUPPLY CIRCUIT

CHECK IC1601

CHECK X2201/ R1218

1 - 4

3-2. AUDIO CIRCUIT

NO SOUND

IS THERE

AN IMAGE?

Ye s

ARE IC1501

pins 8, 9, 15, 20

5V?

Ye s

ARE THERE

SIGNALS AT IC1501

pins 1, 2, 3, 5 AND

IC1507 pins 40, 41, 45,

46, 47, 38?

Ye s

ARE THERE

SIGNALS AT IC1501

PINS 13, 15 and

IC1507 pins 9-14?

Ye s

IS Q1505

BASE VOLTAGE

0V?

No

No

No

No

No

BREAKDOWN BEFORE IC1201

ARE IC1505

pin 3 +5V & pin 1 +8V

Ye s

BREAKDOWN OF IC1506

BREAKDOWN OF IC1201

ARE THERE

SIGNALS AT IC1501

pins 26,27,28 and

IC1507 pins 34, 35, 36?

No

No

CHECK IC1505 OR +8V LINE ETC.

CHECK IC1101/ IC1601

Ye s

IS Q1505

COLLECTOR

VOLTAGE

8V?

Ye s

IS IC1501 pin 21

and IC1507 pin 3-6

VOLTAGE 5V?

Ye s

IS Q1507, Q1501

COLLECTOR

VOLTAGE 8V?

Ye s

ARE SIGNALS AT

IC1507, IC1508,
IC1509, IC1510

pins 7, 8?

Ye s

BREAKDOWN OF

Q1305, Q1307-Q1311, Q3503, Q3504

BREAKDOWN OF IC1501

No

No

No

No

BREAKDOWN OF Q1505 OR
Q1506 OR D1504

BREAKDOWN OF
IC1501, IC1507

BREAKDOWN OF Q1507, Q1501

BREAKDOWN OF
IC1507, IC1508, IC1509, IC1510

1 - 5

3-3. RECORDER AUDIO CIRCUIT

NO SOUND

ARE THERE SIGNALS

AT PG1304 pins 1, 3?

Ye s

ARE IC1512 pins 6, 12
AND IC1513 pins 6, 12

0V?

Ye s

ARE THERE SIGNALS

AT IC1507 pins 5, 10

AND IC1508 pins

5, 10?

Ye s

ARE THERE SIGNALS

AT IC1507 pins 7, 8

AND IC1508 pins 7, 8?

No

No

No

No

BREAKDOWN CRD-RA1

CHECK Q3510, Q3511 AND Q3512

CHECK IC1512 AND IC1513

CHECK IC1507, IC1508,
D3301, D1302, Q3543, Q3544,
Q1310, Q1311, Q3505, Q3506,
Q1312, Q1313, ZD3501, ZD1303

1 - 6

Ye s

CHECK C3515, C3516, C1503, C1504,

R3517, R3518, R1579, R1580

4. Instructions on Use (The following are extracts from the instruction manual. )

Displays the status and message of this unit

Lights when the input level exceeds
0 dB during dubbing or recording.

<Display>

Type of disc inserted into the player

Lights when the angle
can be switched

Title, track or chapter being
selected or played back ,

Surround

Playback control

Remaining disc playback time
or recordable time

Type of disc inserted into the recorder

Lights when the track number is
automatically advanced during recording

Double-speed dubbing (x2)

Repeat play

Lights when the stop position
is in memory.

41

47

46

50

54

42

20

19

19

24

45 52

37

FRONT

FRONT

Player OPEN/CLOSE button

[ACTIVE] indicator

POWER/STANDBY button

STANDBY indicator

STOP button

PLAY/PAUSE button

21

SKIP buttons

/I

POWER/

STANDBY

STOP PLAY/PAUSE STOP PLAY/PAUSE

Player tray Recorder tray

19

Headphone jack (PHONES)

Headphone level control knob (LEVEL)

Recording level control
buttons (+/-)

*

In the case of headphones with L-shape

plug, the plug will not fit into the jack
correctly: Attach a (generally available)
conversion plug to the L-shape plug.

19

19

19

19

37

21

ACTIVE ACTIVE

OPEN/

CLOSE

PHONES LEVEL

•

REC LEVEL

MIN MAX

•

*

29

DUB MODE button

DUB START button

[ACTIVE] indicator

DISPLAY

DUB MODE

DUB START

SOURCE

FINALIZE

UNFINALIZE

ERASE button

UNFINALIZE button

FINALIZE button

19

SOURCE button

19 19

DISPLAY button

53

TRACK NO.,
AUTO/MANUAL button

STOP button

PLAY/PAUSE button

SKIP buttons

TRACK

NO.

ERASE SYNC

AUTO/MANUAL

SYNC button

19

24

36

34

32

24

Recorder OPEN/CLOSE button

24

24

REC STANDBY

SKIPSKIP

button

REC STANDBY

OPEN/
CLOSE

24

26

1 - 7