Mitsubishi Electric DD-5000 Manual de usuario

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Rd. Irvine, CA 92618

Operating conditions: Temperature: 5 °C to 35°C

Operation status: Horizontal

Video output: 1.0 V (p-p), 75Ω, negative

sync., pin jack x 1

S Video output: (Y) 1.0 V (p-p), 75Ω, nega-

tive sync., Mini DIN 4-pin x 1

Color Difference output: (Y) 1.0 V (p-p), 75Ω, nega-

tive sync., pin jack x 1

(Cr)/(Cb) 0.7 V (p-p), 75Ω, pin

jack x 2

Digital Audio output: (Bitstream/PCM) 0.5 V (p-p),

75Ω, pin jack x 1,

Optical connector x 1

Analog Audio output: 2.0 V (rms), 330Ω, pin jack

2 CH L R x 2,

5.1 CH SURROUND x 6

CAUTION

Before servicing this chassis, it is important that the service person reads all SAFETY PRECAUTIONS and the

SAFETY NOTICE in this manual.

SPECIFICATIONS

Power Supply: 120V AC, 60 Hz

Power Consumption: 19W

Weight: 6.7 lb.

External Dimensions: 17"x 3-1/4"x12-1/4"

(W/H/D)

Signal System: Standard NTSC

Laser: Semiconductor laser,

wavelength 650 nm

Frequency Range: (Digital Audio)

Audio CD: 4 Hz to 20 kHz

DVD Linear -

48 kHZ Sampling: 4 Hz to 22 kHz

96 kHZ Sampling: 4 Hz to 44 kHz

Signal-To-Noise Ratio: More than 112 dB (EIAJ)

Audio Dynamic Range: More than 106 dB (EIAJ)

Harmonic Distortion: Less than 0.001%

Wow and flutter: Below measurable level

(less than ± 0.001%

(W.PEAK)) (EIAJ)

SerSer

Servicevice

vicevice

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ManualManual

Manual

2000

MITSUBISH ELECTRIC

Model

DD-5000

DVD Player

OPEN/CLOSE

STOP PLAY PAUSE/STEP

POWER

DD-5000

STANDBY

SKIP

REV FWD

CDVD

TITLE TRK CHP TOTAL REMAIN MEMORY

HDCD

LASER BEAM CAUTION LABEL

When the power supply is on, do not remove this laser caution label. If it is removed, laser radiation may be recceived.

The lightning flash with arrowhead symbol, within an

equilateral triangle, is intended to alert the user to the

presence of uninsulated “dangerous voltage” within the

product’s enclosure that may be of sufficient magnitude to

constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is

intended to alert the user to the presence of important

operating and maintenance (servicing) instructions in the

literature accompanying the appliance.

SAFETY NOTICE

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK

Plug the AC line cord directly into a 120V AC outlet (do

not use an isolation transformer for this check). Use an

AC voltmeter, having 5000 Ωper volt or more sensitivity.

Connect a 1500 Ω10 W resistor, paralleled by a 0.15 µF

150V AC capacitor between a known good earth ground

(water pipe, conduit, etc.) and all exposed metal parts of

the cabinet (antennas, handle bracket, metal cabinet

screwheads, metal overlays, control shafts, etc.).

Measure the AC voltage across the 1500 Ωresistor.

The test must be conducted with the AC switch on and

then repeated with the AC switch off. The AC voltage

indicated by the meter may not exceed 0.3 V. A reading

exceeding 0.3 V indicates that a dangerous potential

exists, the fault must be located and corrected.

Repeat the above test with the DVD VIDEO PLAYER

power plug reversed.

NEVER RETURN A DVD VIDEO PLAYER TO THE

CUSTOMER WITHOUT TAKING NECESSARY

CORRECTIVE ACTION.

READING SHOULD NOT EXCEED 0.3V

DVD VIDEO PLAYER

AC VOLTMETER

(5000

per volt

or more sensitivity)

Good earth ground

such as a water pipe,

conduit, etc.

1500

10 W

0.15 µF 150V AC

AC OUTLET

Test all exposed metal.

Voltmeter Hook-up for Leakage Current Check

SECTION 2

PART REPLACEMENT AND ADJUSTMENT PROCEDURES

SECTION 3

SERVICING DIAGRAMS

1. STANDING PC BOARDS FOR SERVICING ......................... 3-1

2. CIRCUIT SYMBOLS AND

SUPPLEMENTARY EXPLANATION ..................................... 3-2

2-1. Precautions for Part Replacement .................................... 3-2

2-2. Solid Resistor Indication .................................................... 3-2

2-3. Capacitance Indication ....................................................... 3-2

2-4. Inductor Indication ............................................................. 3-3

2-5. Waveform and Voltage Measurement .............................. 3-3

2-6. When Replaced ROM ICs or Upgraded Firmware ........ 3-4

3. PRINTED WIRING BOARD AND

SCHEMATIC DIAGRAM .......................................................... 3-5

4. BLOCK DIAGRAMS .................................................................. 3-7

4-1. Overall Block Diagram ...................................................... 3-7

4-2. Power Supply Block Diagram ........................................... 3-9

4-3. Front Display, Power Switch Block Diagram ................ 3-10

4-4. Main Block Diagrams ....................................................... 3-13

4-5. Output Block Diagram ..................................................... 3-17

5. CIRCUIT DIAGRAMS ............................................................. 3-18

5-1. Power Supply Circuit Diagram ....................................... 3-18

5-2. Front Display, Power Switch Circuit Diagram .............. 3-21

5-3. Main Circuit Diagram ...................................................... 3-24

5-4. Output Circuit Diagram ................................................... 3-41

5-5. Motor System Circuit Diagrams ..................................... 3-47

6. PC BOARDS .............................................................................. 3-49

6-1. Power Supply PC Board ................................................... 3-49

6-2. Main PC Board ................................................................. 3-50

6-3. Output PC Board .............................................................. 3-55

CONTENTS

SECTION 1

GENERAL DESCRIPTIONS

1. PREPARATION FOR SERVICING ......................................... 1-1

2. LOCATION OF MAIN PARTS AND

MECHANISM PARTS ............................................................... 1-2

2-1. Location of Main Parts ....................................................... 1-2

2-2. Location of Mechanism Parts ............................................ 1-3

1. REPLACEMENT OF MECHANICAL PARTS ...................... 2-1

1-1. Cabinet Replacement .......................................................... 2-1

1-1-1. Top Cover ........................................................................ 2-1

1-1-2. Clamper Stay ................................................................... 2-1

1-1-3. Tray Panel ....................................................................... 2-2

1-1-4. Front Panel and Tray ..................................................... 2-3

1-1-5. Rear Panel ....................................................................... 2-3

1-2. PC Board Replacement ...................................................... 2-4

1-2-1. Main PC Board ............................................................... 2-4

1-2-2. Output PC Board ............................................................ 2-4

1-2-3. Power PC board .............................................................. 2-5

1-2-4. Front PC Board ............................................................... 2-5

1-3. Mechanism Parts ................................................................. 2-6

1-3-1. Mechanism Chassis Assembly ....................................... 2-6

1-3-2. Loading Belt .................................................................... 2-6

1-3-3. Loading Motor ................................................................ 2-7

1-3-4. Sub Chassis (with a pickup mechanism) ...................... 2-7

1-3-5. Pickup Mechanism Assembly ........................................ 2-8

1-3-6. Gear A Assembly, Gear B and

Rack Gear Assembly ...................................................... 2-8

1-3-7. Feed Motor ...................................................................... 2-9

3. TROUBLESHOOTING .............................................................. 1-6

3-1. Main Circuit ........................................................................ 1-6

3-1-1. Servo System ................................................................... 1-6

3-1-2. Location Diagram of Servo Test Point ....................... 1-13

SECTION 4

PARTS LIST

SAFETY PRECAUTION ................................................................. 4-1

NOTICE ............................................................................................. 4-1

ABBREVIATIONS ........................................................................... 4-1

1. Integrated Circuit (IC) ............................................................ 4-1

2. Capacitor (Cap) ....................................................................... 4-1

3. Resistor (Res) ........................................................................... 4-1

4. EXPLODED VIEWS ................................................................... 4-2

4-1. Packing Assembly ............................................................... 4-2

4-2. Chassis Assembly ................................................................ 4-3

4-3. Mechanism Assembly ......................................................... 4-4

5. PARTS LIST ................................................................................ 4-5

1-1

SECTION 1

General Descriptions

1. PREPARATION FOR SERVICING

The Pickup Head consists of a laser diode that is very susceptible to external static electricity.

Although it may operate properly after replacement, if subjected to electrostatic discharge during replacement, its

life may be shortened. When replacing the laser diode, LSI's and IC's, use a conductive mat, soldering iron with

ground wire, etc. to protect against damage from static electricity.

1MΩ

Ground conductive

wrist strap for body.

Soldering iron

with ground wire

or ceramic type

Conductive mat

The ground resistance

between the ground line

and the ground is less than 10Ω.

Fig. 1-1-1

1-2

2. LOCATION OF MAIN PARTS AND MECHANISM PARTS

2-1. Location of Main Parts

Fig. 1-2-1

EU05 Output PC board

Feed motor PC board

EU03 Front display PC board

Loading motor PC board

Disc motor PC board

EU04 Power SW PC board

EU01 Main PC board

EU02 Power supply PC board

1-3

2-2. Location of Mechanism Parts

Fig. 1-2-2 Mechanism chassis assembly (Top side)

Fig. 1-2-3 Mechanism chassis assembly (Bottom side)

Tra

Clamper sta

Loading moto

PC boar

Mechanism chassi

1-4

Fig. 1-2-4 Mechanism chassis assembly (Internal side)

Loading belt

Loading motor

Kick lever

Cam Slide

Gea

Disc motor

1-5

Fig. 1-2-5 Pickup mechanism chassis assembly (Top side)

Fig. 1-2-6 Pickup mechanism chassis assembly (Bottom side)

Front damper

Rack gear

assembly

Gear A

Gear B assembly

Front dampe

Sub chassis

Rear dampe

Pickup assembl

Rear damper

Feed moto

PC boar

1-6

3. TROUBLESHOOTING

3-1. Main Circuit

3-1-1. Servo System

(1) Initial Operation after Power ON

Power ON

Send each LSI hard RST

command and initial command.

Pickup head is positioned at

transmission initial position.

Is tray closed?

Pin 5 of CN502,

TCLS=L

Disc presence/absence and

disc judgement

Is a disc present?

DVD or CD initial setting.

DVD single

Initial setting.

DVD dual

Initial setting.

To each disc playback process.

DVD single (single-layer) DVD single

(single-layer)/DVD dual

(dual-layer)/CD?

DVD dual (dual-layer)

Tray close operation

Pin 6 of IC601: LDMP = H/L

Pin 7 of IC601: LDMN = L

Is tray closed?

Pin 5 of CN502:

TCLS = L

Tray stops.

Pin 6 of IC601: LDMP = H

Pin 7 of IC601: LDMN = L

Laser OFF

Display: INSERT DISC

Monitor screen: NO DISC

Fig. 1-3-1

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