Mitsubishi Electric DD-8020 Service Manual

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

MITSUBISH ELECTRIC

STANDBY

CAUTION

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

SAFETY NOTICE in this manual.

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)

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

DD-8020

DVD AUDIO/VIDEO PLAYER

TITLETRK CHP

HDCD

A U D I O

C D V D

SPECIFICATIONS

Operating conditions:

Operation status:

Video output:

S Video output:

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

(1 Interlaced)

(1 Progressive)

Digital Audio output:

Analog Audio output:

9351 Jeronimo Rd. Irvine, CA 92618

Ser

Ser vice

Ser

Manual

DVD Player

OPEN/CLOSE

STOP

TOTAL REMAIN MEMORY

Temperature: 5°C to 35°C

Horizontal

1.0 V (p-p), 75Ω, negative

sync., pin jack x 1

(Y) 1.0 V (p-p), 75Ω, nega-

tive sync., Mini DIN 4-pin x 1

negative sync., pin jack x 1

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

75Ω, pin jack x 2

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

75Ω, pin jack x 1,

Optical connector x 1

2.0 V (rms), 220Ω, pin jack

2 CH L R x 2,

5.1 CH SURROUND x 6

vice

2002

vice

Model

DD-8020

P R O G R E S S I V E

PLAY

PAUSE/STEP

Table of Contents

Summary of Contents for Mitsubishi Electric DD-8020

Page 1 Ser vice vice vice Manual Manual Manual Manual Manual MITSUBISH ELECTRIC DVD Player Model DD-8020 OPEN/CLOSE DD-8020 DVD AUDIO/VIDEO PLAYER P R O G R E S S I V E STOP PLAY PAUSE/STEP STANDBY TITLETRK CHP TOTAL REMAIN MEMORY...
Page 3 SAFETY NOTICE SAFETY PRECAUTIONS LEAKAGE CURRENT CHECK Measure the AC voltage across the 1500 Ω resistor. Plug the AC line cord directly into a 120V AC outlet (do not use an isolation transformer for this check). Use an The test must be conducted with the AC switch on and AC voltmeter, having 5000 Ω...
Page 4 SAFETY NOTICE 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...
Page 5: Table Of Contents
CONTENTS SECTION 1 GENERAL DESCRIPTIONS 1. PREPARATION FOR SERVICING ......... 1-1 3. TROUBLESHOOTING ............1-7 2. LOCATION OF MAIN PARTS AND 3-1. Main Circuit ............... 1-7 MECHANISM PARTS ............... 1-2 3-1-1. Servo System ..............1-7 2-1. Location of Main Parts ............1-2 3-1-2.
Page 7: Preparation For Servicing
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 might be shortened. When replacing the laser diode, LSI's and IC's, use a conductive mat, soldering iron with ground wire, etc.
Page 8: Location Of Main Parts And Mechanism Parts
2. LOCATION OF MAIN PARTS AND MECHANISM PARTS 2-1. Location of Main Parts EU01 Main PC board Feed motor PC board EU02 Power supply PC board EU05 Output PC board EU04 Power SW PC board Disc motor PC board Loading motor PC board EU03 Front display PC board Fig.
Page 9: Location Of Mechanism Parts
2-2. Location of Mechanism Parts Tray Clamper stay Fig. 1-2-2 Mechanism chassis assembly (Top side) Loading motor PC board Mechanism chassis Fig. 1-2-3 Mechanism chassis assembly (Bottom side)
Page 10 Loading belt Gear Kick lever Gear Gear Loading motor Disc motor Cam Slider Fig. 1-2-4 Mechanism chassis assembly (Internal side)
Page 11 <Type A> Note: When servicing, note that this model has two types of pickup mechanism assembly. Type A is a service part. Type B can be replaced with a Type A pickup. Front damper Front damper Rack gear assembly Pickup assembly Gear A Gear B assembly Sub chassis...
Page 12 <Type B> Front damper Front damper Rack gear assembly Pickup assembly Gear A Gear B assembly Sub chassis Rear damper Rear damper Fig. 1-2-7 Pickup mechanism chassis assembly (Top side) Feed motor Feed motor PC board Fig. 1-2-8 Pickup mechanism chassis assembly (Bottom side)
Page 13 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 Tray close operation Pin C9 of IC306 (E537): LDMP = H/L...
Page 14 The pickup transmission initial operation is carried out to determine the initial position by transmitting the pickup to the innermost position once (start-limit switch (pin 4 of CN503) Pickup (P.U.) transmission initial develops "L".) and to the external direction at low speed operation does not occur.
Page 15 Disc kind misjudgement (Initial setting is NG.) Are FE and RFSB signals for each disc normal? Check IC502. Lens cleaning. Check peripheral Replace pickup head. circuit of IC306. Fig. 1-3-4 Laser operating current DVD Iop 20mA 35mA 60mA 20mA 45mA 80mA CD Iop Check laser operating current.
Page 16 (2) Picture appears (PLAY) PLAY Disc motor (D.M.) forced accelleration (500 ms) Focus search Repeat three times. Is forcus servo CLV servo ON. Tracking balance adjustment Tracking servo ON. Focus gain adjustment Automatic adjustment is carried out when a disc is replaced after power ON.
Page 17 Disc motor (D.M.) does not rotate. Does pin 117 of IC401 (TP409) PLCK oscillate around 10 MHz ? Check peripheral Check peripheral circuits circuit of IC402. of IC402. Check disc motor and wiring. Fig. 1-3-10 Focus servo is NG. Focus servo ON signal waveform Are FE, RFSB, FSON signals normal?
Page 18 Tracking servo is NG. Is TE signal normal? Check peripheral Check IC502. circuit of IC306. Fig. 1-3-13 Signal waveform at Signal waveform at tracking servo ON (CD) tracking servo ON (DVD) TE signal Pin 151 (TP406) of IC401 1.65V RFRP signal Pin 153 (TP408) of IC401 Search ON (SRCH) Pin 38 (TP411) of IC401...
Page 19 Does pulse of Disc playback is NG (DVD). L = 1.65V and H = 3.3V develop at pin 131 and L = 0V and H = 1.65V develop at pin 132 of IC401? Is PLL locked? Check peripheral circuits (Refer to waveforms.) of IC401 and IC306.
Page 20 3-1-2. Location Diagram of Servo Test Point CN701 CN503 CN501 IC503 IC502 CN502 CN901 IC313 IC306 IC401 IC312 CN603 CN302 CN601 Fig. 1-3-21 1-14...
Page 21: Replacement Of Mechanical Parts
SECTION 2 PART REPLACEMENT AND ADJUSTMENT PROCEDURES CAUTIONS BEFORE STARTING SERVICING Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to take a proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw- driver in servicing.
Page 22: Tray Panel
<Mounting > 1-1-3. Tray Panel <Tray Ejection> 1. The spring for tray side pressure is inserted into the portion “A”. (Refer to Fig. 2-1-2.) 1. Slide the slider (2) of the mechanism chassis assembly (1) with a screwdriver, etc. in the arrow direction, so 2.
Page 23: Front Panel And Tray
• Confirm that the mark of the gear matches with the Tray (3) triangle mark on the reverse side of the tray in the tray close status. (The gear is rotated with the slider locks.) (Refer to Fig. B.) Fig. A Gear (4) Triangle mark Tray panel (4)
Page 24: Pc Board Replacement
1-2-2. Output PC board 1-2. PC Board Replacement 1. Peel off the tape (1). 1-2-1. Main PC Board 2. Remove the connector (2). Note: 3. Disconnect two flexible cables (3). • Before removing the main PC board (4), be sure to 4.
Page 25 1-2-3. Power Supply PC Board 1-2-4. Front PC Board 1. Peel off the tape (1). 1. Remove the front panel. (Refer to item 1-1-4.) 2. Remove the connectors (2) and (3). 2. Remove one flexible cable (1). 3. Remove three screws (4). 3.
Page 26 1-3. Mechanism Parts 1-3-2. Loading Belt 1. Remove the gear (1) by releasing the claw. 1-3-1. Mechanism Chassis Assembly 2. Remove the gear (2). Note: 3. Remove the gear (3) and the loading belt (4). • When removing the mechanism chassis assembly (3), 4.
Page 27 1-3-4. Sub Chassis (with a pickup mechanism) 1-3-3. Loading Motor 1. Turn the mechanism chassis assembly (1) upside down. 1. Remove the loading belt. (Refer to item 1-3-2.) 2. Remove one screw (2) and one washer (3) release the 2. Remove two screws (1) and two claws. Then remove boss “A”...
Page 28 1-3-5. Pickup Mechanism Assembly 1-3-6. Gear B Assembly, Gear A and Rack Gear Assembly <Removal> <Removal> 1. Remove four screws (1) and four washers (2) then remove the pickup mechanism assembly (3). 1. Remove one screw (3) and remove the gear B assembly (1).
Page 29 Positioning holes 1-3-7. Feed Motor <Removal> Pickup Head (5) Gear B assembly (1) 1. Remove the gear B assembly and the gear A. (Refer to item 1-3-6.) 2. Remove two screws (1) and remove the feed motor (2) (with the feed motor PC board (3) attached). (Refer to Fig.
Page 30 2-10...
Page 31: Standing Pc Boards For Servicing
SECTION 3 SERVICING DIAGRAMS 1. STANDING PC BOARDS FOR SERVICING EU02 Power supply PC board EU05 Output PC board EU04 Power SW PC board EU03 Front display PC board EU01 Main PC board Fig. 3-1-1...
Page 32: Circuit Symbols And Supplementary Explanation
2. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION 2-1. Precautions for Part Replacement • In the schematic diagram, parts marked (ex. • Using the parts other than those specified shall violate the regulations, and may cause troubles such as F801) are critical part to meet the safety regulations, operation failures, fire etc.
Page 33: Inductor Indication
2-4. Inductor Indication Eg. 4 ... Η Unit None µ ... µH ... mH Tolerance None ... ±5% ... ±0.1% ... ±0.25% ... ±0.5% ... ±1% Type name ... ±2% ... ±10% ... ±20% Fig. 3-2-4 2-5. Waveform and Voltage Measurement Eg.
Page 35: Printed Wiring Board And Schematic Diagram
3. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM EU05 OUTPUT CNY02 Board-in CNY01 CNX01 FFC 1mm 26P FFC 1mm 18P Press-fit L=120 W302 Mechanism W501 FFC 1mm 23P CN901 CN302 MON2 VOR2 CN802 VREF CN501 EU02 POWER FFC 1.25mm 6P W502 LDMP TOPN CN502...
Page 36: Block Diagrams
4. BLOCK DIAGRAMS 4-1. Overall Block Diagram Data/Control Bus DVD AV Data SP DIF Data MAIN PROCESSOR UNIT AUDIO/VIDEO OUTPUT UNIT IC402 M11B11664A-30T 1M-DRAM Coaxial Digital Buffer ICY09 TOS Link Digital Tray TC74HCU04A IC401 Audio Out Motor TC94A03F RF Amp. Xtal Feed ICY03...
Page 37: Power Supply Block Diagram
4-2. Power Supply Block Diagram T802 TRANS D821, C821 RECTIFIER E+6V SMOOTHING E+5V D829 Q827 5V REG/SW VDD+5V PWON D822-23, C822-23 Q828 RECTIFIER VDD+3.3V 3.3V REG/SW D801-04, C805 SMOOTHING RECTIFIER SMOOTHIN Q829, D830-31 2.5V REG/SW VDD+2.5V C801-04 D825, C824 T801 Q823-24 RECTIFIER AC FILTER...
Page 38: Front Display, Power Switch Block Diagram
4-3. Front Display, Power Switch Block Diagram 4-3-1. Front Display col 1 col 2 Fig. 3-4-3 4-3-2. Front Display Pattern col 1 col 2 Fig. 3-4-4 3-10...
Page 39 4-3-3. Front Display, Power Switch Block Diagram Fig. 3-4-5 3-12 3-11...
Page 40: Main Block Diagrams
4-4. Main Block Diagrams 4-4-1. Servo System Block Diagram 3# 27,-6 1+!$ Fig.3-4-6 3-14 3-13...
Page 41 4-4-2. Logical System Block Diagram Fig. 3-4-7 3-16 3-15...
Page 42: Output Block Diagram
4-5. Output Block Diagram ICY04 QY29 NJM4580 QY17 CNY01 G+6DB QY25 ICY01 ICY03 AD1833 NJM4580E AUDIO DAC JY01 QY27 Lch SIGNAL MUTE ADATAF OUT LP1 OUT LN1 FRONT1 LRCK QY19 SDATA Rch SIGNAL MUTE OUT RN1 ADATAS OUT RP1 QY01 JY02 QY07 ADATACSW...
Page 43: Circuit Diagrams
5. CIRCUIT DIAGRAMS 5-1. Power Supply Circuit Diagram Drain-Sourse Q801 ON MODE (AC120V 60Hz in) V:50 V/div s/div Gate-Sourse Q801 ON MODE (AC120V 60Hz in) V:5 V/div s/div Fig. 3-5-2 Fig. 3-5-1 3-20 3-19...
Page 44 5-2. Front Display, Power Switch Circuit Diagram Fig. 3-5-3 3-22 3-21...
Page 45: Front Display, Power Switch Circuit Diagram
Front Display, Power Switch Circuit Diagram IC101, Pin IC101, Pin X-OUT V: 2 V/div V: 2 V/div H: 100 ns/div H: 5 ms/div IC101, Pin IC101, Pin V: 2 V/div V: 10 V/div H: 5 ms/div H: 5 ms/div IC101, Pin IC101, Pin V: 2 V/div V: 10 V/div...
Page 46: Main Circuit Diagram
5-3. Main Circuit Diagrams 5-3-1. New Main ICs Information TMP87CH75F TC74VHCT S24C02AFJA W986432DH PQ3RD23 MBM29LV160 PQ05RD11 AD1833AST8 MPC2948T BH7863 3-24...
Page 47 5-3-2. Main Circuit Diagram Fig. 3-5-5 3-27 3-25 3-28 3-26...
Page 48 5-4 Output Circuit Diagram Fig. 3-5-6 3-29 3-30 3-31 3-32...
Page 49: Output Circuit Diagram
Output Circuit Diagram CNX01 JX01 Composite ICY09 ICY03 BUFFER LPF & AMP video output (a) Pin (b) Pin -10.0 100% color bar (Play) CVBS output 75Ω terminated 100% color bar V: 500 mV/div V: 0.5 V/div H: 20 µs/div H: 20 µs/div JX01 JY01 L ch output / R ch output...
Page 50: Motor System Circuit Diagrams
5-5. Motor System Circuit Diagram Fig. 3-5-8 3-34...
Page 51: Pc Boards
6. PC BOARDS 6-1. Power Supply PC Board Part Loca- Part Loca- tion tion C801 F822 C802 F823 C803 L801 C804 L821 C805 P802 C806 Q801 P802 C807 Q802 C808 Q803 F801 C809 Q804 T801 C811 Q821 C812 Q822 D801 C821 Q823 C822...
Page 52 3-36...
Page 53 6-2. Main PC Board CN503 CN501 C702 R526 R528 CN701 C543 R501 R557 R529 C541 R527 JP501 C539 TP501 R556 R502 C518 C904 IC904 C914 IC901 IC902 R508 TP502 C517 C906 C902 C903 R522 IC313 TP402 TP401 TP408 TP503 TP406 TP405 TP504 TP404...
Page 54 C711 C716 C505 C506 D501 R701 C717 R552 R506 C502 C501 R547 D502 R504 R503 C503 R551 R916 R910 R917 R918 C532 R911 R912 C533 C534 C515 C530 R361 R535 C417 R301 Q503 C413 C406 C403 R426 R412 R428 R418 R340 R430 C422...
Page 55: Main Pc Board
Main PC Board (Top Side) Part Loca- Part Loca- Part Loca- tion tion tion C314 CN601 R444 C318 CN603 R445 C320 CN701 R446 C321 CN901 R447 C326 CN902 R448 C330 IC306 R449 C331 IC310 R450 C401 IC311 R451 C402 IC312 R452 C407 IC313...
Page 56 Main PC Board (Bottom Side) Part Loca- Part Loca- Part Loca- tion tion tion C301 C601 R357 C302 C602 R358 C303 C603 R359 C304 C703 R360 C305 C704 R361 C306 C706 R365 C307 C708 R366 C308 C711 R367 C309 C713 R368 C310 C714...
Page 57 CN503 CN501 C702 R526 R528 CN701 C543 R501 R557 R529 C541 R527 JP501 C539 TP501 R556 R502 C518 C904 IC904 C914 IC901 IC902 R508 TP502 C517 C906 C902 C903 R522 IC313 TP402 TP401 TP408 TP503 TP406 TP405 TP504 TP404 TP403 TP407 JP301 C410...
Page 58 C711 C716 C505 C506 C717 D501 R701 R552 F-MARK4 R506 C502 C501 R547 D502 R504 R503 C503 R551 R916 R910 R917 R918 C532 R911 R912 C533 C534 C515 C530 R361 R535 C417 R301 Q503 C413 C406 C403 R426 R412 R428 R418 R340 R430...
Page 59: Output Pc Board
Part Loca- Part Loca- Part Loca- Part Loca- Part Loca- 6-3. Output PC Board tion tion tion tion tion CNX01 CY14 DX01 QY06 RY18 CNX02 CY15 DX02 QY07 RY19 CNY01 CY16 DX03 QY08 RY20 CNY02 CY17 DX05 QY09 RY21 CX01 CY19 DX07 QY12...
Page 61: Parts List
SECTION 4 PARTS LIST SAFETY PRECAUTION The parts identified by ! ( ) mark are critical for safety. Replace only with part number specified. The mounting position of replacement is to be identical with originals. The substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.
Page 62: Exploded Views
4. EXPLODED VIEWS 4-1. Packing Assembly ZF23 ZF10 ZF11 ZF20 ZF01 ZK03 ZK01 ZK02 Note: The shape of the packing material is sometimes different. Fig. 4-4-1...
Page 63: Chassis Assembly
4-2. Chassis Assembly ZG60 BID 3.0x6.0 ZG60 BID 3.0x6.0 ZG20 ZG63 ZG27 ZG60 BID 3.0x6.0 ZG67 W901 W302 ZG64 W503 W502 EU02 EU01 ZG74 W501 ZG71 ZG21 ZG60 EU05 ZG71 EU04 W102 ZG22 EU03 ZG26 ZG69 ZG70 ZG03 ZG01 W603 Fig.
Page 64 4-3. Mechanism Assembly MC61 Type A MP01 BID 2.6x8.0 (MP01A) MP60 MP16 MP91 PAN 1.7x4.0 MC04 MP61 MP92 PAN 2.6x15 MP37 MC03 MP65 PAN 1.7x3 MP37 MP36 MC63 MC12 BID 2.6x3.5 MC11 MC14 MC33 MP36 FM01 EU05 MC65 MC10 BID 2.6x3.5 ZG63 MC01 RM01...
Page 65: Mechanism Assembly
Mechanism Assembly (Type B) Note: MP01 Type B (MP01B) The pickup mechanism assembly has two types, A and B of MP60 PAN 2.6x5 which shapes differ. MP91 MP61 PAN 1.7x4.0 PAN 2.6x16 Only Type A is a service part. Type B can be changed to Type A MP16 MP92 pickup free from any performance problem.
Page 66: Parts List
5. PARTS LIST Part Number Description I/B DD8020 Instruction Book 79070037 CABLE-AV 79070416 CHASSIS ASSY MECHANISM 79070489 MECHA-PU ASSY 79071205 PANEL-FRONT 79071206 PANEL-TRAY 79073035 COVER-TOP 79078072 REMOTE 79080192 CABLE (6 pin main-chassis mech) 79080193 CABLE (8 pin main-chassis) 79080273 CABLE 79081092 PCB-FRONT 79081093...

Mitsubishi Electric DD-8020 Service Manual

Quick Links

Related Manuals for Mitsubishi Electric DD-8020

Summary of Contents for Mitsubishi Electric DD-8020

Table of Contents