Service Manual for MITSUBISHI DD6020

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), 75

, negative

sync., pin jack x 1

S Video output:

(Y) 1.0 V (p-p), 75

, nega-

tive sync., Mini DIN 4-pin x 1

(C) 0.286 V (p-p), 75

Color Difference outputs: (Y) 1.0 V (p-p), 75

,

(1 Interlaced)

negative sync., pin jack x 1

(1 Progressive)

(Cr, Pr)/(Cb, Pb) 0.7 V (p-p),

75

, pin jack x 2

Digital Audio output:

(Bitstream/PCM) 0.5 V (p-p),

75

, pin jack x 1,

Optical connector x 1

Analog Audio output:

2.0 V (rms), 220

, pin jack

2 CH L R x 2,

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:

17W

Weight:

6.6 lb.

External Dimensions:

17"x 3-3/8"x12-1/8"

(W/H/D)

Signal System:

Standard NTSC

Laser:

Semiconductor laser,

wavelength 650nm/780nm

Frequency Range:

(Digital Audio)

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 108 dB (EIAJ)

Harmonic Distortion:

Less than 0.002%

Wow and flutter:

Below measurable level

(less than ± 0.001%

(W.PEAK)) (EIAJ)

Ser

Service

vice

Manual

2002

MITSUBISHELECTRIC

Model

DD-6020

DVD Player

OPEN/CLOSE

STOP

PLAY

PAUSE/STEP

POWER

DVD AUDIO/VIDEO PLAYER

DD-6020

STANDBY

SKIP

REV

FWD

/

CDVD

TITLETRK CHP

TOTAL REMAIN

MEMORY

PROGRESSIVE

-

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

per volt or more sensitivity.

Connect a 1500

10 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

cabinet (antennas, handle bracket, metal cabinet

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

Measure the AC voltage across the 1500

resistor.

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

9 per volt

or more sensitivity)

Good earth ground

such as a water pipe,

conduit, etc.

1500

9

10 W

0.15

µF 150V AC

AC OUTLET

Test all exposed metal.

Voltmeter Hook-up for Leakage Current Check

LASER BEAM CAUTION LABEL

When the power supply is turned on, you may 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

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

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 ........................................................... 3-19

5-1. Power Supply Circuit Diagram .................................... 3-19

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

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

5-4. Output Circuit Diagrams .............................................. 3-29

5-5. Motor System Circuit Diagrams .................................. 3-38

6 . PC BOARDS ............................................................................ 3-39

6-1. Power Supply PC Board ................................................ 3-39

6-2. Main PC Board ............................................................... 3-41

6-3. Output PC Board ............................................................ 3-51

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 ............................................................ 1-7

3-1. Main Circuit ....................................................................... 1-7

3-1-1. Servo System ................................................................. 1-7

3-1-2. Location Diagram of Servo Test Point .................. 1-14

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 ............................................................................... 4-6

MITSUBISHI DD6020 Service Manual

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