Mitsubishi DD-8050 Service manual

2004

Service Manual

DVD PLAYER

MODEL

DD-8050

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

OPERATING CONTROLS AND FUNCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5-1

CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6-1

BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1

SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9-1

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1

FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1

SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1

IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13-1

LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14-1

EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15-1

MECHANICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16-1

ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17-1

MITSUBISHI ELECTRIC

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.

SPECIFICATIONS

ITEM CONDITIONS UNIT NOMINAL LIMIT

1. Video Output 75 ohm load Vpp 1.0 ± 0.1

2. Optical Digital Out dBm -18

3. Audio (PCM)

3-1. Output Level 1 kHz 0 dB Vrms 2.0

3-2. S/N dB 120

3-3. Freq. Response

DVD fs=48kHz ± 0.5dB Hz 20~22 k

CD fs=44.1kHz ± 0.5dB Hz 20~20 k

3-4. THD+N

DVD 1 kHz 0dB % 0.004

CD 1 kHz 0dB % 0.0045

NOTES:

1. All Items are measured without pre-emphasis unless otherwise specified.

2. Power supply : AC120 V 60 Hz

3. Load imp. : 100 k ohm

4. Ambient Temperature : +25

°C

1-1-1 E5932SP

LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.

Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.

Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.

Drive Mecha Assembly

Laser Beam Radiation

Laser Pickup

Turntable

WHEN OPEN. DO NOT

CAUTION

LASER RADIATION

STARE INTO BEAM.

Location: Top of DVD mechanism.

1-2-1 E5_LASER

IMPORTANT SAFETY PRECAUTIONS

Product Safety Notice

Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by a # on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The Product’s Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

Precautions during Servicing

A. Parts identified by the # symbol are critical for

safety. Replace only with part number specified.

B. In addition to safety, other parts and assemblies

are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1)Wires covered with PVC tubing

2)Double insulated wires

3)High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1)Insulation tape

2)PVC tubing

3)Spacers

4)Insulators for transistors

E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.

F. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.).

G. Check that replaced wires do not contact sharp

edges or pointed parts.

H. When a power cord has been replaced, check that

5 - 6 kg of force in any direction will not loosen it.

I. Also check areas surrounding repaired locations. J. Be careful that foreign objects (screws, solder

droplets, etc.) do not remain inside the set.

K. Crimp type wire connector

The power transformer uses crimp type connectors which connect the power cord and the primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards. Replacement procedure

1)Remove the old connector by cutting the wires at a point close to the connector.

Important: Do not re-use a connector. (Discard it.)

2)Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.

3)Align the lengths of the wires to be connected. Insert the wires fully into the connector.

4)Use a crimping tool to crimp the metal sleeve at its center. Be sure to crimp fully to the complete closure of the tool.

L. When connecting or disconnecting the internal

connectors, first, disconnect the AC plug from the AC outlet.

1-3-1 DVD_SFN1

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance distance (d) and (d’) between soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

Table 1: Ratings for selected area

AC Line Voltage Clearance Distance (d), (d’)

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

120 V

Note: This table is unofficial and for reference only.

Be sure to confirm the precise values.

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified value in the table below.

Measuring Method (Power ON) :

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across the terminals of load Z. See Fig. 2 and the following table.

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:

120 V

≥ 3.2mm (0.126 inches)

0.15µF CAP. & 1.5kΩ RES. Connected in parallel

Exposed Accessible Part

1.5k

i≤0.5mA Peak Exposed accessible parts

0.15 F

Earth Ground

Power Cord Plug Prongs

AC Voltmeter (High Impedance)

Fig. 1

Fig. 2

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

1-3-2 DVD_SFN1

STANDARD NOTES FOR SERVICING

Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is indicated as shown.

Top View

Out

2. For other ICs, pin 1 and every fifth pin are indicated as shown.

Pin 1

3. The 1st pin of every male connector is indicated as shown.

Input

Bottom View

Pb (Lead) Free Solder

When soldering, be sure to use the Pb free solder.

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:.

(1) Prepare the hot-air flat pack-IC desoldering

machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)

Pin 1

Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.

2. FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle.

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

Fig. S-1-1

(2) Remove the flat pack-IC with tweezers while apply-

ing the hot air.

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Caution:

1. The Flat Pack-IC shape may differ by models. Use an appropriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat Pack-IC.

2. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2)

1-4-1 E5STA

3. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it.

With Soldering Iron:

(1) Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

CBA

Masking Tape

Tweezers

Hot-air Flat Pack-IC Desoldering Machine

Flat Pack-IC

Fig. S-1-2

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

(2) Lift each lead of the flat pack-IC upward one by

one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4)

Sharp Pin

Fine Tip Soldering Iron

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Fig. S-1-4

1-4-2 E5STA

With Iron Wire:

(1) Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

(2) Affix the wire to a workbench or solid mounting

point, as shown in Fig. S-1-5.

(3) While heating the pins using a fine tip soldering

iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5.

(4) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(5) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Note:

When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

Hot Air Blower

2. Installation

(1) Using desoldering braid, remove the solder from

the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily.

(2) The “I” mark on the flat pack-IC indicates pin 1.

(See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.)

(3) Solder all pins of the flat pack-IC. Be sure that none

of the pins have solder bridges.

Example :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig. S-1-7

To Solid Mounting Point

CBA

Tweezers

Iron Wire

Soldering Iron

Fig. S-1-5

Fine Tip Soldering Iron

Flat Pack-IC

Presolder

Flat Pack-IC

CBA

Fig. S-1-8

Fig. S-1-6

1-4-3 E5STA

Instructions for Handling Semi-conductors

Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

(1) Be sure to place a conductive sheet or copper plate

with proper grounding (1MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

1-4-4 E5STA

OPERATING CONTROLS AND FUNCTIONS

or ty

ol.

FRONT PANEL

4 5 6 7 8321

REMOTE CONTROL

10 11 12

13 14

15 16

17 18

1. POWER Button

Press to turn the power on and off.

2. PAUSE Button (main unit)

Pauses the current disc operation.

PAUSE/STEP Button (remote control)

Pauses the current disc operation. View the still picture frame by frame.

3. STOP Button

Stops operation of the disc.

4. PLAY Button

Starts playback of the disc contents.

5. SKIP Buttons : Plays back from the beginning of the next

chapter or track.

: Plays back from the beginning of the current

chapter or track.

6. OPEN/CLOSE Button

Press to insert or remove discs from the tray.

7. Disc loading tray

8. Display, Remote Sensor Window

27 26 25

23 5 2

4 22 3 21 20

9. Numeric Buttons

10. CLEAR Button

Resets a setting.

11. TITLE Button

Displays the title menu.

12. Arrow Buttons

Use to scroll and cycle through disc and player men and settings.

13. ENTER Button

Press to accept a setting.

14. ZOOM Button

Enlarges part of a DVD-reproduced image.

15. REV Button

Fast reverse playback to a desired point.

16. SEARCH MODE Button

Press to locate a desired point.

17. REPEAT Button

Repeats playback of the current disc, title, chapter track.

18. MODE Button

Activates program playback or random playback mo when playing DVD-Audio, CDs, Super Audio CDs MP3/JPEG/Picture CD/WMA. Also Sets Image Quali setting, Black Level, Virtual Surround and Speech Contr

19. DIMMER Button

Select the display panel brightness.

20. A-B REPEAT Button

Repeats playback of a selected section.

21. DISPLAY Button

Displays timer and bit-rate information on the T screen.

22. FWD Button

Fast forwards playback to a desired point.

23. RETURN Button

Returns to the previous operation.

24. MENU Button

Displays the disc menus.

25. ANGLE/PAGE Buttons

Press to change the camera angle to see the sequen being played back from a different angle. Press to select the image to be displayed.

26. SUBTITLE Button

Press to select a desired subtitle language.

27. AUDIO Button

Press to select a desired audio language or sound mod

28. SETUP Button

Press to enter the setup mode or to change setup item

1-5-1 E5932IB

REAR VIEW

2 3 3 3 3

GROUP

SACD P.SCAN

DVD A

VCD

Lights up when the A-B repeat function is on.

Lights up when the repeat function is on.

Lights up when Progressive Scan is on.

Lights up when playing a Super Audio CD.

Lights up when the ALL repeat function is on.

Lights up when the inserted disc comes to a pause.

Lights up when playing MULTI-CH AREA on Super Audio CD.

Displays a type of the disc which is inserted on the tray.

: DVD disc

DVD

: DVD-audio : VCD :

Audio CD, MP3, JPEG, PictureCD, WMA

Lights up when the inserted disc is being played back.

Lights up when the playback is slow mode.

Displays how long the current title or track has been played back. When a chapter or track is switched, the number of a new title, chapter or track is displayed.

Power on

No disc inserted or playing DVD menu

Opening the Tray

Closing the Tray

Loading the disc

Lights up when the playback control is activated (VCD)

Power off

Dark

OFF

Bright

DVD

LYCr

DIGITAL AUDIO OUT

(PCM/BITSTREAM)

AUDIO OUT

OPTICAL COAXIAL

29 34 36353330 3132 37

9. Power Cord

0. Left AUDIO OUT Jack

1. OPTICAL DIGITAL AUDIO OUT Jack

2. COAXIAL DIGITAL AUDIO OUT Jack

3. Right AUDIO OUT Jack

VIDEO

VIDEO OUT

S-VIDEO

ANALOG

SURROUND

SUBWOOFER

CENTER

5.1 CH

AUDIO OUT

OUT

FRONT

34. VIDEO OUT Jack

35. COMPONENT VIDEO OUT Jacks

36. S-VIDEO OUT Jack

37. ANALOG 5.1 CH AUDIO OUT Jacks

DISPLAY

DVD

VCD CD

It is possible to change the brightness of display unit by pressing the DIMMER button of remote control

When

the display is returned to the setup status.

the power supply is turned off,

DISPLAYS DURING

OPERATION

LOADING THE BATTERIES

1. Open the battery compartment cover.

2. Insert two AA batteries, with each one oriented correctly.

3. Close the cover.

Notes

Do not mix alkaline and manganese batteries. Do not mix old and new batteries.

1-5-2 E5932IB

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.

[6] Function

CBA

[2] Front

Assembly

[3] Reinforce

Plate

[8] DVD

Mecha

[9] Main

PCB Holder

[10] 5.1ch Amp CBA

[1] Top Case

[4] DVD Main

CBA Unit

[11] Jack

PCB Holder

[5] Rear

Panel

[7] AV CBA

2. Disassembly Method

ID/

LOC.

No.

[1] Top Case D1 5(S-1) ---

[2]

[3]

[4]

[5] Rear Panel D4 7(S-4), (S-5) ---

[6]

[7] AV CBA D5 (S-6), (S-7), *CN1301 ---

[8]

[9]

[10]

[11]

PAR T

Front Assembly

Reinforce Plate

DVD Main CBA Unit

Function CBA

DVD Mecha

Main PCB Holder

5.1ch Amp CBA

Jack PCB Holder

Fig.

No.

D2 2(S-2) ---

D5 *CN2001 ---

D6 4(S-8) ---

D6 2(S-9) ---

D6 *2(L-4) ---

D6 2(S-10) ---

REMOVAL

REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER

*4(L-1), *3(L-2), *3(L-3)

(S-3A), 2(S-3B), *CN201, *CN301, *CN401, *CN501, *CN601

Note

1 1-1 1-2

2 2-1 2-1

(1): Identification (location) No. of parts in the figures (2): Name of the part (3): Figure Number for reference (4): Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or desoldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector *=Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2)

(5): Refer to “Reference Notes.”

About tightening screws

When tightening screws, tighten them with the following torque.

Screws Torque

(S-1), (S-2), (S-3A), (S-4), (S-5), (S-6), (S-7), (S-8), (S-9), (S-10)

(S-3B) 0.38 ± 0.04 N·m

0.45 ± 0.05 N·m

Reference Notes

CAUTION 1: Locking Tabs (L-1), (L-2) and (L-3) are fragile. Be careful not to break them.

1-1. Release four Locking Tabs (L-1) and three Lock-

ing Tabs (L-2).

1-2. Release three Locking Tabs (L-3), then remove

the Front Assembly.

CAUTION 2: Electrostatic breakdown of the laser diode in the optical system block may occur as a potential difference caused by electrostatic charge accumulated on cloth, human body etc, during unpacking or repair work.

To avoid damage of pickup follow next procedures. 2-1. Short the three short lands of FPC cable with sol-

der before removing the FFC cable (CN201) from it. If you disconnect the FFC cable (CN201), the laser diode of pickup will be destroyed. (Fig. D4)

2-2. Remove Screw (S-3A) and two Screws (S-3B).

Then disconnect Connectors (CN301), (CN401), (CN501) and (CN601) and lift the DVD Main CBA Unit. (Fig. D3)

CAUTION 3: When reassembling, confirm the FFC cable (CN201) is connected completely. Then remove the solder from the three short lands of FPC cable. (Fig. D3)

↓

(1)

↓

(2)

↓

(3)

↓

(4)

↓

(5)

1-6-1 E5932DC

[1] Top Case

(S-1)

[3] Reinforce Plate

(S-1)

Fig. D1

(S-2)

CN201

(S-3B)

CN501

CN301

CN401

(S-3B)

(S-3A)

[4] DVD Main CBA Unit

Short the three short lands by soldering. (Either of two places.)

CN601

(L-1)

(L-3)

(L-1)

(L-2)

[2] Front Assembly

(L-1)

Fig. D2

Connector

View for A

(S-4)

Fig. D3

[5] Rear Panel

(S-5)

(S-4)

Fig. D4

1-6-2 E5932DC

[6] Function CBA

(S-6)

CN2001

CN1301

(S-7)

[7] AV CBA

[10] 5.1ch Amp CBA

(S-10)

[11] Jack PCB Holder

(S-8)

(L-4)

Fig. D5

HOW TO EJECT MANUALLY (Method 1)

1. Remove the Top Case, Reinforce Plate and DVD Main CBA Unit.

2. Rotate the roulette in the direction of the arrow as shown below.

(L-4)

View for A

[8] DVD Mecha

(S-9)

[9] Main PCB Holder

Fig. D6

Rotate this roulette in the direction of the arrow

1-6-3 E5932DC

+ 32 hidden pages