Mitsubishi DD-4021 - User Manual

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DVD PLAYER

2001

MODEL

DD-4021

Manual

Service

MITSUBISHI ELECTRIC

TABLE OF CONTENTS

SPECIFICATIONS .......................................................................................................................................... 1-1-1

LASER BEAM SAFETY PRECAUTIONS........................................................................................................ 1-2-1

IMPORTANT SAFETY PRECAUTIONS .......................................................................................................... 1-3-1

STANDARD NOTES FOR SERVICING .......................................................................................................... 1-4-1

CABINET DISASSEMBLY INSTRUCTIONS ................................................................................................... 1-5-1

BLOCK DIAGRAMS ........................................................................................................................................ 1-6-1

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS ................................................................................. 1-7-1

WAVEFORMS.................................................................................................................................................. 1-8-1

WIRING DIAGRAM.......................................................................................................................................... 1-9-1

SYSTEM CONTROL TIMING CHARTS ........................................................................................................ 1-10-1

IC PIN FUNCTION DESCRIPTIONS..............................................................................................................1-11-1

LEAD IDENTIFICATIONS.............................................................................................................................. 1-12-1

EXPLODED VIEWS....................................................................................................................................... 1-13-1

MECHANICAL PARTS LIST .......................................................................................................................... 1-14-1

ELECTRICAL PARTS LIST ........................................................................................................................... 1-15-1

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

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This document is a service manual for the Mitsubishi DD-4021 DVD Player, published in 2001 by Mitsubishi Digital Electronics America, Inc. It provides comprehensive information for servicing and maintaining the device.

Function Description:

The Mitsubishi DD-4021 is a DVD player designed for home entertainment systems. It processes and outputs video and audio signals from DVD and CD media. The device includes various internal components for RF signal processing, servo control, system control, video processing, and audio processing, all working in concert to deliver a complete multimedia experience. The player features a front panel with controls for power, open/close, play, pause, and stop, along with a display for operational feedback. It also supports remote control operation.

Important Technical Specifications:

Video Output: 1.0 Vpp into a 75 ohm load.
Optical Digital Out: -18 dBm.
Audio (PCM) Output Level: 2.0 Vrms at 1kHz 0dB.
Audio (PCM) S/N: 110 dB.
Audio (PCM) Frequency Response:
- DVD: 20-22kHz at fs=48kHz, ±2 dB.
- CD: 20-20kHz at fs=44.1kHz, ±2 dB.
Audio (PCM) THD+N: 0.005% at 1kHz 0dB.
Power Supply: AC120 V, 60 Hz.
Load Impedance: 100 K ohm.
Room Ambient Temperature for Measurement: +25 °C.
Laser Type: The device uses a pickup that emits a laser beam, requiring safety precautions during servicing.
Safety Compliance: The manual outlines specific clearance distances and leakage current limits to ensure safety, with a leakage current limit of ≤ 0.5mA Peak for exposed accessible parts.

Usage Features:

The DD-4021 DVD player offers several user-friendly features:

Initialization of Setup Menu: To initialize the setup menu, users power on the device, insert a disc, then press "1," "2," "3," "4," "DISPLAY," and "ENTER" buttons on the remote control in sequence. After temporarily powering off, the power can be turned on again to finalize the initialization.
Clearing Password Protection (Parental Lock): If the Parental Lock password is forgotten, the setup menu can be used to release parental lock by following a specific procedure.
Setting or Clearing Tray Lock: The tray lock mode can be set to ON or OFF. This feature is displayed on the top right of the screen. To set or clear, load a disc, set the DVD player to stop mode, then press "SETUP," "TITLE," "3," "AUDIO," "D," and "SETUP" buttons in order. When the tray lock mode is on, the tray cannot be opened or closed, and other operations are unavailable.
Manual Eject: In case of a power failure or other issues preventing normal disc ejection, the manual provides instructions for a manual eject. This involves removing the top case, inserting an eject-bar (approximately 3 mm diameter, 8 mm length) into the manual eject hole on the PCB Holder, and then pulling out the tray.

Maintenance Features:

The service manual provides detailed instructions for maintenance and repair, emphasizing safety and proper handling of components.

Laser Beam Safety Precautions: Strict warnings are provided regarding laser radiation. Technicians are instructed not to look directly at the laser beam or allow it to strike skin. A caution label on the device warns against staring into the beam when open.
Important Safety Precautions: The manual highlights product safety notes, emphasizing that mechanical and electrical parts have special safety-related characteristics. Only recommended replacement parts should be used to avoid creating shock, fire, or other hazards. Precautions for servicing include using specified internal wiring, double insulated wires, high voltage leads, and specified insulating materials.
Safety Check after Servicing: After repairs, technicians must examine the surrounding area for damage, ensure screws, parts, and wires are in their original positions. Clearance distance and leakage current tests are mandatory to confirm compliance with safety standards.
Standard Notes for Servicing: This section covers circuit board indications (output pins of regulators, pin 1 and fifth pins of ICs, and first pin of male connectors).
How to Remove / Install Flat Pack-IC: Detailed steps are provided for removing and installing flat pack ICs using a hot-air desoldering machine or a soldering iron with an iron wire. Cautions include avoiding prolonged hot air exposure to surrounding chip parts and handling the IC gently to prevent damage to foil or solder lands.
Instructions for Handling Semiconductors: Guidelines are given for handling semiconductors to prevent electrostatic breakdown, including grounding oneself and using conductive surfaces.
Cabinet Disassembly Instructions: A comprehensive flowchart and step-by-step method are provided for disassembling the cabinet, including removal of the top case, front assembly, function CBA, PCB holder, DVD mecha, AV CBA, DVD main CBA unit, and rear panel. Specific instructions are given for releasing locking tabs and screws.
Special Cautions for Disassembly: Warnings are issued regarding fragile locking tabs and electrostatic breakdown of the laser diode. Instructions include shorting the copper pattern of the FPC cable with solder before disconnecting it to prevent laser diode destruction.
Block Diagrams: The manual includes block diagrams for system control, RF signal process/servo, DVD signal process, video, and audio, illustrating the interconnections and signal flow between major components and integrated circuits.
Schematic Diagrams / CBA's and Test Points: Detailed schematic diagrams and component layouts for the main CBA, AV CBA, switch CBA, and function CBA are provided, along with test points and voltage indications for various operational states (e.g., PLAY mode).
Waveforms: Illustrations of expected waveforms at specific IC pins (e.g., IC001, IC300, IC601, IC801) are included for diagnostic purposes, covering signals like MONREF, VIDEO-Y, PCM-DATA0, PCM-MCLK, NRZP, VIDEO-C, AUDIO-L, and NRZN.
Wiring Diagram: A comprehensive wiring diagram shows the connections between the pick-up unit, inner CBA, mecha CBA, main CBA unit, AV CBA, switch CBA, and function CBA, as well as external audio/video outputs and AC cord input.
System Control Timing Charts: Timing charts illustrate the sequence of events and signal levels during operations like "Tray close - Play / Play - Tray open," aiding in troubleshooting system control issues.
IC Pin Function Descriptions: A table lists the pin numbers, input/output status, signal names, and functions for key ICs, such as IC2003 (Front Panel Control).
Lead Identification: Diagrams are provided for identifying various semiconductor components (transistors, diodes, ICs) and their pin configurations.
Exploded Views: Detailed exploded diagrams of the cabinet and packing illustrate the assembly of the DVD player and its packaging components, with references to parts lists.
Mechanical Parts List and Electrical Parts List: Comprehensive lists of all mechanical and electrical components, including part numbers and descriptions, are provided for ordering replacement parts. These lists also include product safety notes for critical components.

Mitsubishi DD-4021 Specifications

General

Brand	Mitsubishi
Model	DD-4021
Category	DVD Player
Language	English