Mitsubishi Electric DD-8020 User manual

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Rd. Irvine, CA 92618
Copyright © 2002 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
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
(C) 0.286 V (p-p), 75Ω
Color Difference outputs: (Y) 1.0 V (p-p), 75Ω,
(1 Interlaced) negative sync., pin jack x 1
(1 Progressive) (Cr, Pr)/(Cb, Pb) 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), 220Ω, 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: 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)
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ManualManual
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Manual
2002
MITSUBISH ELECTRIC
Model
DD-8020
DVD Player
OPEN/CLOSE
STOP PLAY PAUSE/STEP
POWER
DVD AUDIO/VIDEO PLAYER DD-8020
STANDBY
SKIP
REV FWD
/
CDVD
TITLETRK CHP TOTAL REMAIN MEMORY
HDCD
PROGRESSIVE
AUDIO

-

SAFETY NOTICE
SAFETY PRECAUTIONS
LEAKAGE CURRENT CHECK
Plug the AC line cord directly into a 120VAC 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
150VAC 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 theAC voltage across the 1500 Ωresistor.
The test must be conducted with the AC switch on and
then repeated with the AC switch off. TheAC 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 W per volt
or more sensitivity)
Good earth ground
such as a water pipe,
conduit, etc.
1500 W
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 Diagram ................................................ 3-29
5-5. Motor System Circuit Diagrams .................................. 3-34
6. PC BOARDS ............................................................................ 3-35
6-1. Power Supply PC Board ................................................ 3-35
6-2. Main PC Board ............................................................... 3-37
6-3. Output PC Board ............................................................ 3-47
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