sony_DPA-300_service_manual 维修电路图.pdf

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1、DPA-300 US Model Canadian Model SERVICE MANUAL DIGITAL STILL RECORDER MICROFILM Model Name Using Similar MechanismNEW MD Mechanism TypeMDM-2BR Base Unit NameMBU-2 Optical Pick-up NameKMS-210A/J-N U.S and foreign patents licensed from Dolby Laboratories Licensing Corporation. Continued on next page S

2、PECIFICATIONS System Recording formatPicture MD recording system Data compression/saving system JPEG FINE mode : 128kB (the maximum 1,000 images) STANDARD mode : 64kB (the maximum 2,000 images) Revolutions400 rpm to 900 rpm (CLV) Error correctionAdvanced Cross Interleave Reed Solomon Code (ACIRC) La

3、serSemiconductor laser ( = 780 nm) Emission duration : continuous Laser outputMax 44.6 W * This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Sampling frequency44.1 kHz CodingAdaptive TRansform Acoustic Coding (A

4、TRAC) Modulation systemEFM (Eight to Fourteen Modulation) Number of channels2 stereo channels InputVIDEO INPUT Input signal : 1Vp-p (75 unbalanced) Y/C INPUT, Mini DIN 4-pin Luminance signal : 1Vp-p (75 unbalanced) Chrominance signal : 0.286 Vp-p (75 unbalanced) AUDIO IN (L/R) Input level : 2 Vrms (

5、full bit) Input impedance : more than 47 k FS1/FS2 (RED/WHITE) connectors OutputVIDEO OUTPUT Output signal : 1 Vp-p (75 unbalanced) Y/C OUTPUT, Mini DIN 4-pin Luminance signal : 1 Vp-p (75 unbalanced) Chrominance signal : 0.286 Vp-p (75 unbalanced) AUDIO OUT (L/R) Output level : 2 Vrms (full bit) Ou

6、tput impedance : more than 47 k 收音机爱好者资料库 Ra d i o Fa n s .CN 2 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APP

7、EAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISE

8、S SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other expo

9、sed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by an

10、y one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2.A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3.Measuring the voltage drop across

11、 a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2

12、V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. General Power requirementsSony AC Power Adaptor AC-DA300 (supplied) connected at the DC IN 12 V jack : 120V AC, 60Hz (US

13、 model) Power consumption20 W Operating temperature5 C to 35 C (41F to 95F) Operating humidity30% to 85% DimensionsApprox. 280 80 290 mm (111/8 31/4 111/2 inches) (w/h/d, including projecting parts and controls) MassApprox. 2.5 kg (5 lb. 8 oz) Supplied accessoriesAC power adaptor AC-DA300 Remote com

14、mander RMT-DA300 (1) Size AA (R6) batteries (2) Design and specifications are subject to change without notice. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing K

15、eep the temperature of soldering iron around 270C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. CAUTION Danger of explosion if battery is incorrectly replace

16、d. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturers instructions. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 收音机爱

17、好者资料库 Ra d i o Fa n s .CN 3 TABLE OF CONTENTS 1. SERVICING NOTE4 2. GENERAL7 3. DISASSEMBLY 3-1.Upper Case 11 3-2.Front Panel, Panel Board and Video In Board 11 3-3.Picture Board, Power Board and Mechanism Deck 12 3-4.MD Mechanism Deck 13 3-5.Slider (MD Mechanism) 13 3-6.MD Base Unit (MBU-2) and Loa

18、ding Motor Assy 14 3-7.How to Attach the Slider (MD Mechanism) 14 4. TEST MODE15 5. ELECTRICAL ADJUSTMENTS18 6. DIAGRAMS 6-1.Circuit Board Location28 6-2.Block Diagram BD Section 29 6-3.Block Diagram MD Control Section 31 6-4.Block Diagram Video Control Section 33 6-5.Block Diagram Video Process Sec

19、tion 35 6-6.Block Diagram IR Section 37 6-7.Block Diagram Video Out Section 39 6-8.Block Diagram Video In Section 41 6-9.Block Diagram Audio Section 43 6-10. Block Diagram Power Section 45 6-11. Printed Wiring Board Picture Section 47 6-12. Schematic Diagram Picture Section (1/3) 51 6-13. Schematic

20、Diagram Picture Section (2/3) 55 6-14. Schematic Diagram Picture Section (3/3) 59 6-15. Printed Wiring Board BD Section 62 6-16. Schematic Diagram BD Section 65 6-17. Schematic Diagram Video In Section 69 6-18. Printed Wiring Board Video In Section 73 6-19. Printed Wirimg Board MD Section 77 6-20. S

21、chematic Diagram MD Section (1/2) 81 6-21. Schematic Diagram MD Section (2/2) 85 6-22. Printed Wiring Board Power Section 89 6-23. Schematic Diagram Power Section 91 6-24. Printed Wiring Board Panel Section 94 6-25. Schematic Diagram Panel Section 97 6-26. IC Block Diagrams99 6-27. IC Pin Function 1

22、11 7. EXPLODED VIEWS 7-1.Upper Case Section 144 7-2.Front Panel Section 145 7-3.Bottom Cabinet Section 146 7-4.Mechanism Section (MDM-2BR)147 7-5.Base Unit Section (MBU-2)148 8.ELECTRICAL PARTS LIST149 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 1 SERVICING NOTE About Switches on POWER Board Backup Powe

23、r ON/OFF Switch (S1351 B. UP ON) Be sure to turn this switch to OFF when removing and inserting connectors to and from the circuit boards. This switch protects semiconductors from breakdown due to static electricity. Set this switch to ON during normal operation. The DPA-300 does not work unless thi

24、s switch is set to ON. Reset Switch (S1352 RESET) This switch resets forcibly system of DPA-300. Press the reset switch when microprocessor runs away, or when DPA-300 does not operate normally, or when the main power is desired to turn ON, OFF and back ON momentarily during test mode, etc. Rear Side

25、 S1351 (B.UP ON) S1352 (RESET) POWER board 5 How to Set the Mode Displaying the Through Picture Input the color bar signal and enter this mode as follows to check the DPA-300 for voltages, waveforms and to implement a part of adjustments. Connection: When the equipment connection is completed, set u

26、p this mode by following the procedures in the order given below. 1.Turn the main power ON. (Turn on the main power of color bar generator, DPA-300 and monitor.) 2.Connect the color bar signal to video input. Color bar signal specifications to be input Color bar signal for voltage and waveform measu

27、rement Color bar signal for adjustment 3.Insert the MD data disc. List of album appears. When the MD data disc has not been formatted, format it. 4.Select “Load” using the f F g G button and press the ENTER button. The message “Create new album and add photos?” appears. 5.Select “Yes” using the f F

28、g G button and press the ENTER button. The new album to load the pictures are created. When an album is created, the loading menu appears. 6.Select “Video input” using the g G button and press the ENTER button. The display from which the modes can be selected, appears 7.Select “Frame” using the g G

29、button and press the ENTER button. Mode differs depending on the type of input signal supplied from the video equipment connected. 8.Select “OK” using the f F g G button and press the ENTER button. 9.Color bars supplied to the Video Input connector, appear on monitor when the ENTER button is pressed

30、. Note :When the ENTER button is pressed in the state of step 9, the picture is loaded and the DPA-300 exits the Through mode. When the ENTER button is pressed incorrectly, follow the instruction shown on the monitor screen and return to the state of step 9. DPA-300 Color bar generator Output Input

31、Video Output Video Input or S-Video Input monitor WHITE (75%) YELLOW CYAN GREEN MAGENTA RED BLUE BLACK WHITE (75%) YELLOW CYAN GREEN MAGENTA RED BLUE BLACK QIWHITE (100%)BLACK 6 About Extension Cable To check the MD board, connect the PICTURE board and the POWER board using the extension cables as s

32、hown before starting to check. How to Route the Cables Be sure to route the cables which connect the POWER board CN1002, CN1006, CN1007 and PICTURE board CN1001 as shown. CN2007 PICTURE board CN4002 Extension cable 40p J-2501-122-A Extension cable 5p J-2501-120-A Extension cable 10p J-2501-121-A CN2

33、003 CN2006 MD board POWER board to CN1004 to CN1001 Rear panel Lead pin (LP1003) CN1002 CN1006 CN1007 POWER board Rear panel Rear Side to CN1001 on PICTURE board Lead pin (LP1004) 7 SECTION 2 GENERAL This section is extracted from instruction manual. 8 9 10 11 SECTION 3 DISASSEMBLY Note :Follow the

34、disassembly procedure in the numerical order given. 3-1.UPPER CASE 3-2.FRONT PANEL , PANEL BOARD AND VIDEO IN BOARD 1 Two screws (M3 8) 2 Two screws (M3 8) 3 Two screws (BV/RING) 4 Remove the upper case by pilling it in the directions shown by the arrow A. A 8 Connector (CN106 : VIDEO IN board) 7 Co

35、nnector (CN8201 : JACK board) 6 Connector (CN5002 : PICTURE board) 5 Connector (CN5003 : PICTURE board) 9 FRONT PANEL assy 4 VIDEO IN board ! PANEL board 3 Screw (BVTP 3 6) ! Screw (BVTP 2.6 8) ! Screw (BVTP 2.6 8) 2 Five screws (BVTP 3 12) ! Two screws (BVTP 2.6 8) 1 Five screws (BVTP 3 8) ! Two sc

36、rews (BVTP 2.6 8) 12 3-3.PICTURE BOARD, POWER BOARD AND MECHANISM DECK Two screws (BVTP 3 6) Two screws (BVTP 3 6) Mechanism deck (MDM-2BR) ! POWER board Screw (BVTP 3 6) ! Screw (BVTP 3 6) Stay plate 6 Screw (BVTT 2.6 5) 7 Screw (BVTT 2.6 5) ! Connector (CN2005) ! Connector (CN2001) ! Connector (CN

37、2002) ! Connector (CN2006) ! Connector (CN2008) ! Connector (CN2501) ! Nylon rivet 8 PICTURE board 9 Connector (CN2007) 5 Connector (CN1002) 4 Connector (CN1001) 2 Connector (CN3002) 1 Connector (CN5001) 3 Connector (CN3001) ! Connector (CN1002) MD board Screw (BVTP 3 6) Screw (BVTP 3 6) 13 3-4.MD M

38、ECHANISM DECK 3-5.SLIDER (MD MECHANISM) 1 Two screws (B2.6 18) 2 Two collars (damper) 3 Turn the pulley (BD) in the direction of arrow A , and move the slider in the direction of the arrow B. (Because the slider is caught by the stopper in the middle, move the stopper slightly up to make the slider

39、free as shown in illustration A. Then turn the pulley (BD) in the direction of the arrow A further.) Pulley (BD) Illustration A 4 Two screws (B2.6 18) 5 Two collars (damper) Slider ! Insulator (MD) ! Compression coil spring 6 Screw (BVTT 2.6 4) 7 Ground terminal 8 Two insulators (MD) 9 Two compressi

40、on coil springs ! Insulator (MD) ! Compression coil spring Mounting bracket (MD) A B 1 Remove the torsion coil spring from the claw A. A B 2 While removing the claw B, lift up the lever (SLM) and remove it. 5 Move the claw C of the slider in the direction of the arrow A? while taking care not to be

41、caught by the craw D. Lift up the claw C of the slider. Remove the torsion coil spring from the claw B. Craw C Craw D 3 Screw (PTT 2 4) Lever (SLM) Torsion coil spring Craw B Craw A 4 Ground terminal Slider 14 3-6.MD BASE UNIT (MBU-2) AND LOADING MOTOR ASSY 3-7.HOW TO ATTACH THE SLIDER (MD MECHANISM

42、) 4 Belt (BD) 5 Two screws (B2.6 5) 6 Connector (CN192) 7 Loading motor assy 1 Screw (BVTP3 6) 3 MD base unit (MBU-2)2 Two screws (BVTP3 6) 3 Turn the pulley (BD) in the direction of the arrow C to move the slider in the direction of the arrow B, and lock it with the lever (SLM). 2 Turn the lever (S

43、LM) fully in the direction of the arrow A. 1 Set the four projections of the lever in the right and the left to the position as shown. A C B 15 SECTION 4 TEST MODE Close Audio Test Video Test Capture Mode Audio Test PREPARATION FOR USE OF TEST MODE Connect the equipment as shown below before startin

44、g the test mode. Connection: How to Enter the Test Mode While pressing the + button, press the RESET button. How to Exit the Test Mode Remove the AC adapter from wall outlet. There are two test modes. One is the audio test mode and the other is the video test mode. When the DPA-300 enters the test m

45、ode, main menu appears allowing operator to select either audio test mode or video test mode. Select the desired test mode by pressing the cross marked button ( , ), and press the ENTER button. Main menu Refer to the respective items for more details. Audio Test ModePage 15 Video Test ModePage 17 DP

46、A-300Monitor VIDEO OUTPUT connectorVIDEO INPUT connector AUDIO SECTION INTRODUCTION Enter the test mode referring to PREPARATION FOR USE OF TEST MODE in the left column of this page. All of the messages described as “displayed” in section “ 5. ELECTRICAL ADJUSTMENT ” appears on monitor screen during

47、 adjustment. 1. BASIC OPERATIONS OF THE TEST MODE All operations are performed using the cross marked button ( , , n , N ), and press the ENTER button. The respective buttons have the following functions. 2. SELECTING THE TEST MODE Select the desired test mode from the ten test modes by pressing the

48、 , buttons. For detailed description of each adjustment mode, refer to the “ 5. ELECTRICAL ADJUSTMENTS ”. If a different adjustment mode has been selected by mistake, press the N button to exit from it. *1: The EEP MODE, Vol MODE, Ver.xx.xx and Virgin mode are not used in servicing. If set accidenta

49、lly, press the N button immediately to exit it. , buttonChanges parameters and modes n button Proceeds onto the next steps. Confirms the entry. N button Returns to the previous step. Stop operations. Function NameFunction TEMP ADJUST Temperature compensation offset adjustment LDPWR ADJUSTLaser power adjustment EFBAL ADJUSTTraverse adjustm