Mitsubishi-DD4021-dvd-sm 电路图 维修手册.pdf

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1、 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 /

2、 CBAS 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.

3、 9351 Jeronimo Road, Irvine, CA 92618-1904 Copyright 2001 Mitsubishi Digital Electronics America, Inc. All Rights Reserved RadioFans.CN 收音机爱 好者资料库 HOW TO INITIALIZE THE SETUP MENU After turning the power ON, without a disc in the tray, press the 1, 2, 3, 4, DISPLAY and ENTER buttons on the remote co

4、ntrol unit in this order. Then, after turning the power OFF temporarily, turn the power ON again to intialize the Setup Menu. HOW TO CLEAR THE PASSWORD PROTECTION (In case the Parental Lock password is forgotten) To release parental lock, initialize the setup menu using the procedure above. HOW TO S

5、ET OR CLEAR THE TRAY LOCK To set the tray lock mode to on, follow the procedures below: 1. With loading a disc, set the DVD player to the stop mode. 2. Press the SETUP button to display the SETUP menu. 3. Press the TITLE button. 4. Press the 3 button. 5. Press the AUDIO button. 6. Press the 0 button

6、. 7. Press the SETUP button. Tray Lock mode is set to ON and Tray Lock On is displayed on the top right of the screen. While the Tray Lock mode is on, the tray cannot be opened or closed. Other operations are available. To release the Tray Lock mode, perform the above procedures again. Tray Lock mod

7、e is set to OFF and Tray Lock Off is displayed on the top right of the screen. HOW TO MANUAL EJECT 1. Remove the Top Case. 2. Insert the eject-bar (length = approximately 3 mm, diameter = approximately 8 mm) into the manual eject hole on the PCB Holder. Then, press it until the tray is ejected. 3. P

8、ull out the tray. Manufatured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby Laboratories. Confidential Unpublished Works. (1992-1997 Dolby Laboratories, Inc. All rights reserved.) DTS and DTS Digital Out are trademarks of Digital Theater Systems Inc. Ej

9、ect-Bar (Length = approximately 80 mm, Diameter = approximately 3 mm) Manual Eject Hole Tray Top Case PCB Holder RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS ITEMCONDITIONSUNITNOMINALLIMIT 1 Video Output75 ohm loadVpp1.0 2 Optical Digital OutdBm-18 3 Audio(PCM) 3-1. Output Level1kHz 0dBVrms2.0 3-2. S/NdB1

10、10 3-3. Freq. Response DVDfs=48kHz 2022kHzdB 2 CDfs=44.1kHz 2020 kHzdB 2 3-4. THD+N1 kHz 0dB%0.005 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. Room ambient : +25 C 1-1-1E5500SP RadioFans.CN 收音机爱 好者资料库 L

11、ASER BEAM SAFETY PRECAUTIONS This DVD player uses a pickup that emits a laser beam. 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 t

12、he laser beam. Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure. Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin. LASER RADIATION WHEN OPEN. DO NOT STARE I

13、NTO BEAM. CAUTION Location: Inside Top of DVD mechanism. 1-2-1DVD_LASER IMPORTANT SAFETY PRECAUTIONS Product Safety Notice Some electrical and mechanical parts have special safety-related characteristics which are often not evi- dent from visual inspection, nor can the protection they give necessari

14、ly 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 substi- tute replacement that does not have the same safety characteristics as the recommended repl

15、acement part might create shock, fire, and/or other hazards. The Products 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 co

16、des of the countries in which they are to be sold. However, in order to maintain such compli- ance, 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

17、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 block- ing capacitors, and noise blocking

18、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

19、.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, fus- ible resistors, etc.). G.Check that replaced wire

20、s 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.Use care that foreign objects (screws, solder drop- lets, etc.) do not remain inside the set. K

21、.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 c

22、utting 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

23、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 con- nectors, first, disconnect the AC plug from the AC outlet. 1-3-1DVD_SFN1 Safety Check af

24、ter 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 speci- fied values to verify compliance with safety standards. 1. Cle

25、arance Distance When replacing primary circuit components, confirm specified clearance distance (d) and (d) between sol- dered terminals, and between terminals and surround- ing metallic parts. (See Fig. 1) Table 1 : Ratings for selected area AC Line VoltageClearance Distance (d) (d) 120 V 3.2 mm (0

26、.126 inches) 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 be- tween B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, an- tenna term

27、inals, video and audio input and output ter- minals, 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 voltmete

28、r 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 VoltageLoad ZLeakage Current (i)Earth Ground (B) to: 120 V 0.15F CAP. when removing entire flat pack-IC, first apply soldering iron to center of the flat pack

29、-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (4)Release the flat pack-IC from the CBA using tweez- ers. (Fig. S-1-6) Caution: 1.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 t

30、he flat pack-IC to protect other parts from damage. (Fig. S-1-2) 2.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. Hot-air Flat Pack-IC Desoldering Machine CBA Masking Tape Tweezers Flat Pa

31、ck-IC Fig. S-1-2 Fig. S-1-1 Top View OutIn Bottom View Input 5 10 Pin 1 Pin 1 FFC Cable Connector CBA * Be careful to avoid a short circuit. 1-4-1DVD_NOTE 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 t

32、o all pins of the flat pack-IC, you can remove it easily. (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) (

33、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 tweez- ers. (Fig. S-1-6) With Iron Wire:

34、 (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 p

35、ins 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 cente

36、r 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 tweez- ers. (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

37、 from the CBA, handle it gently because it may be damaged if force is applied. Flat Pack-IC Desoldering Braid Soldering Iron Fig. S-1-3 Fine Tip Soldering Iron Sharp Pin To Solid Mounting Point Hot Air Blower Iron Wire Soldering Iron or Fig. S-1-4 Fig. S-1-5 CBA Tweezers Flat Pack-IC Fine Tip Solder

38、ing Iron Fig. S-1-6 1-4-2DVD_NOTE 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 G mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark m

39、atches the 1 on the PCB when positioning for installation. Then pre- solder 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. Instructions for Handling Semiconductors Electrostatic breakdown of the semic

40、onductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1M) that is properly grounded to remove any static electricity that may be charged on the body. 2. Ground for Workbench Be su

41、re to place a conductive sheet or copper plate with proper grounding (1M) on the workbench or other surface, where the semiconductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semiconductors wit

42、h your clothing. CBA CBA Grounding Band Conductive Sheet or Copper Plate 1M 1M Presolder Soldering Iron CBA Flat Pack-IC Example : Pin 1 of the Flat Pack-IC is indicated by a G mark. Fig. S-1-7 Fig. S-1-8 1-4-3DVD_NOTE CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicate

43、s 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. 2. Disassembly Method ID/ LOC. No. PART REMOVAL Fig. No. REMOVE/ *UNHOOK/UNLOCK/ RELEASE/UNPLUG/ DESOLDER Note 1Top Case15(S-1)- 2 Front Assembly 2 *2(L-1), Tray Panel, *2(L-2), *5(L-3) 1-1 1-2 3 Function CBA 3*3(L-4), *(CN2001)- 4 PCB Holder 42(S-2)- 5 DVD Mecha 4,5 *(CN001, CN201), 2(S-3) 2-1 2-2 2-3 3 6AV CBA6 4(S-4), 4(S-5), *2(L-5), *(CN701, CN501) - 7 DVD Mecha CBA Unit 64(S-6)- 8 Rear Panel