Philips-MDV-430-VT-Service-Manual(1) 电路图 维修手册.pdf

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1、Digital Video Disc Player 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) (1) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) Caution: 1. Do not supply hot air to the chip pa

2、rts 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) 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 s

3、older lands under the IC when removing it. Top View OutIn Bottom View Input 5 10 Pin 1 Pin 1 FFC Cable Connector CBA * Be careful to avoid a short circuit. Fig. S-1-1 Hot-air Flat Pack-IC Desoldering Machine CBA Flat Pack-IC Tweezers Masking Tape Fig. S-1-2 1-4-2DVD_NOTE With Soldering Iron: (1)Usin

4、g 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)Lift each lead of the flat pack-IC upward one by one, using a sharp pin or wire to which solder will not adhe

5、re (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4) (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

6、will be melted). (Fig. S-1-6) (4)Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) 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.

7、(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 t

8、he 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 solderin

9、g 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. Flat Pack-IC Desoldering Braid Soldering Iron Fig. S-1-3 Fine Tip Soldering Iron Sharp Pin Fig. S-1-4 T

10、o Solid Mounting Point Soldering Iron Iron Wire or Hot Air Blower Fig. S-1-5 Fine Tip Soldering Iron CBA Flat Pack-IC Tweezers Fig. S-1-6 1-4-3DVD_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 replacem

11、ent 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 th

12、at none of the pins have solder bridges. Instructions for Handling Semi-conductors Electrostatic breakdown of the semi-conductors 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) t

13、hat is prop- erly grounded to remove any static electricity that may be charged on the body. 2. Ground for Workbench (4) Be sure to place a conductive sheet or copper plate with proper grounding (1M) on the workbench or other surface, where the semi-conductors are to be placed. Because the static el

14、ectricity charge on clothing will not escape through the body ground- ing band, be careful to avoid contacting semi-con- ductors with your clothing. Example : Pin 1 of the Flat Pack-IC is indicated by a mark. Fig. S-1-7 Presolder CBA Flat Pack-IC Fig. S-1-8 CBA CBA Grounding Band Conductive Sheet or

15、 Copper Plate 1M 1M 1-5-1H9400PFS PREPARATION FOR SERVICING How to Enter the Service Mode About Optical Sensors Caution: An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may operate erratically

16、. What to do for preparation Insert a tape into the Deck Mechanism Assembly and press the PLAY button. The tape will be loaded into the Deck Mechanism Assembly. Make sure the power is on, TP502 (SENSOR INHIBITION) to GND. This will stop the function of Tape Start Sensor, Tape End Sen- sor and Reel S

17、ensors. (If these TPs are connected before plugging in the unit, the function of the sensors will stay valid.) See Fig. 1. Note: Because the Tape End Sensors are inactive, do not run a tape all the way to the start or the end of the tape to avoid tape damage. TP502 S-INH Q504 Q503 Fig. 1 1-6-1H9460I

18、B OPERATING CONTROLS AND FUNCTIONS 1-6-2H9460IB 1-6-3H9460IB 1-6-4H9460IB 1-7-1H9460IBR REMOTE CONTROL OPERATION 1-7-2H9460IBR 1-8-1H9460DC CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassemb

19、ling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally. 2. Disassembly Method Note: (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, unlo

20、cked, 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.” ID/ LOC. No. PART REMOVAL Fig. No. REMOVE/*UNHOOK/ UNLOC

21、K/RELEASE/ UNPLUG/DESOLDER Note 1Top CoverD17(S-1)- 2 Front Assembly D2(S-3), *7(L-1) 1 1-1 1-2 3 Top Bracket D24(S-2)- 4 DVD Mecha Assembly D3 3(S-4), *CN401, *CN302, *CN601 - 5 DVD Main CBA Unit D4 2(S-5), *CN201, *CN301 2 2-1 2-2 2-3 3 6Rear UnitD5 5(S-6), 3(S-7), CN1005 - 1 Top Cover 4 DVD Mecha

22、 Assembly 2 Front Assembly 3 Top Bracket 6 Rear Unit 5 DVD Main CBA Unit 16 Side Bracket 10 VCR Chassis Unit 12 Main CBA 15 Deck Pedestal 14 Function CBA 13 DVD OP/CL CBA 7 Power Supply CBA 11 Deck Assembly 8 PCB Bracket 9 Rear Panel 7 Power Suppy CBA D64(S-8)- 8 PCB Brackt D63(S-9)- 9Rear PanelD6-

23、10 VCR Chassis Unit D75(S-10), 4(S-11)- 11 Deck Assembly D8Desolder, 2(S-12)4,5 12Main CBAD8- 13 DVD OP/ CL CBA D8- 14 Function CBA D8- 15 Deck Pedestal D97(S-13)- 16 Side Bracket D9(S-14)- (1) (2) (3) (4) (5) ID/ LOC. No. PART REMOVAL Fig. No. REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER Note 1-

24、8-2H9460DC Reference Notes CAUTION 1: Locking Tabs (L-1) are fragile. Be careful not to break them. 1-1. Remove Screw (S-3). 1-2. Release seven Locking Tabs (L-1) (to do this, first release five Locking Tabs (A) at the side and top, and then release two Locking Tabs (B) at the bot- tom.) CAUTION 2:

25、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. Slide the pickup unit as shown in F

26、ig. D4. 2-2. Short the three short lands of FPC cable with sol- der before removing the FFC cable (CN301) from it. If you disconnect the FFC cable (CN301), the laser diode of pickup will be destroyed. (Fig. D4) 2-3. Disconnect Connector (CN201). Remove two Screws (S-5) and lift the DVD Main CBA Unit

27、. (Fig. D4) CAUTION 3: When reassembling, confirm the FFC cable (CN301) is connected completely. Then remove the solder from the three short lands of FPC cable. (Fig. D4) 4. When reassembling, solder wire jumpers as shown in Fig. D8. 5. Before installing the Deck Assembly, be sure to place the pin o

28、f LD-SW on Main CBA as shown in Fig. D8. Then, install the Deck Assembly while aligning the hole of Cam Gear with the pin of LD- SW, the shaft of Cam Gear with the hole of LD-SW as shown in Fig. D8. (S-1) 1 Top Cover (S-1) (S-1) Fig. D1 (S-2) (S-2) (S-2) 3 Top Bracket (L-1) (L-1) (L-1) 2 Front Assem

29、bly (B) (A) (A) (A) (S-3) Fig. D2 (S-4) (S-4) CN601 CN401 (S-4) 4 DVD Mecha Assembly CN302 Fig. D3 1-8-3H9460DC A View for A Pickup Unit B Short the three short lands by soldering View for B Slide (S-5) CN201 5 DVD Main CBA Unit DVD Mecha (S-5) CN301 Fig. D4 Fig. D5 (S-7) (S-6) (S-6) (S-7) 6 Rear Un

30、it (S-7) CN1005 (S-8) 9 Rear Panel 7 Power Supply CBA 8 PCB Bracket (S-9) (S-8) Fig. D6 (S-11) (S-11) (S-10) (S-10) (S-10) (S-11) (S-11) 10 VCR Chassis Unit Fig. D7 1-8-4H9460DC Fig. D8 11 Deck Assembly (S-12) (S-12) FE Head Cylinder Assembly AC Head Assembly 13 DVD OP/CL CBA 14 Function CBA 12 Main

31、 CBA LD-SW Pin Hole Hole Shaft Cam Gear 12 Main CBA 11 Deck Assembly 12 Main CBA SW507 LD-SW Pin Desolder Desolder BOTTOM VIEW From FE Head From Cylinder Assembly From AC Head Assembly Lead with white stripe Lead with blue stripe From Capstan Motor Assembly Lead connections of Deck Assembly and Main

32、 CBA Printing side Desolder Desolder Lead with blue stripe Lead with blue stripe 1-8-5H9460DC (S-13) 16 Side Bracket (S-14) (S-13) 15 Deck Pedestal Fig. D9 DVD Mecha Deck Assembly Tray Top Cover 3 2 Rotate this roulette in the direction of the arrow 1 2 HOW TO MANUAL EJECT 1. Remove the Top Case. 2.

33、 Rotate this roulette in the direction of the arrow as shown below. 1-9-1H9460EA ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: CBA is an abbreviation for Circuit Board Assembly. NOTE: 1.Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is impo

34、rtant to do these adjustments only after all repairs and replacements have been com- pleted. Also, do not attempt these adjustments unless the proper equipment is available. 2.To perform these alignment / confirmation proce- dures, make sure that the tracking control is set in the center position: P

35、ress either CHANNEL L5? or CHANNEL K button on the front panel first, then the PLAY button on the front panel. Test Equipment Required 1.Oscilloscope: Dual-trace with 10:1 probe, V-Range: 0.00150V/Div., F-Range: DCAC-20MHz 2.Alignment Tape (VFMS0001H6) Head Switching Position Adjust- ment Purpose: T

36、o determine the Head Switching point during playback. Symptom of Misadjustment: May cause Head Switching noise or vertical jitter in the picture. Reference Notes: Playback the Alignment tape and adjust VR501 so that the V-sync front edge of the CH1 video output wave- form is at the 6.5H(412.7s) dela

37、yed position from the rising edge of the CH2 head switching pulse wave- form. Test pointAdj.PointModeInput TP751(V-OUT) TP302(RF-SW) GND VR501 (Switching Point) (MAIN CBA) PLAY (SP) - Tape Measurement Equipment Spec. VFMS0001H6Oscilloscope 6.5H1H (412.7s60s) Connections of Measurement Equipment Osci

38、lloscope Main CBA TP751 CH1 CH2 Trig. (+) GND TP302 Figure 1 EXT. Syncronize Trigger Point 1.0H CH1 CH2 Switching Pulse 6.5H V-Sync 0.5H 1-9-2H9460EA TEST POINT INFORMATION : Indicates a test point with a jumper wire across a hole in the PCB. Test Point TP301 TP302 TP513 TP502 Used in:Page No. Mecha

39、nical Alignment Procedures Mechanical Alignment Procedures Mechanical Alignment Procedures Preparation for Servicing 2-3-3, 2-3-4 2-3-3, 2-3-4 2-3-3 1-5-1 TEST POINTS NOT USED IN ELECTRICAL ADJUSTMENTS TP302 RF-SW TP513 CTL TP301 C-PB VR501 SW-P TP751 V-OUT TP502 SENS-INH Tuner Unit Digital Audio Ou

40、t Antenna In Antenna Out DVD/VCR Audio R Out DVD/VCR Audio L Out DVD/VCR Video Out DVD/VCR Audio R In DVD/VCR Audio L In DVD/VCR Video In S-Video Out Component Video Out DVD Audio R Out DVD Audio L Out DVD/VCR Audio R In DVD/VCR Audio L In DVD/VCR Video In Adjustment Points and Test Points Main CBA

41、Top View 1-10-1H9460TEST FIRMWARE RENEWAL MODE 1. Turn the power on and remove the disc on the tray. 2. To put the DVD player into version up mode, press 9, 8, 7, 6, and SEARCH MODE buttons on the remote control unit in that order. The tray will open automatically. Fig. a appears on the screen and F

42、ig. b appears on the VFD. The DVD player can also enter the version up mode with the tray open. In this case, Fig. a will be shown on the screen while the tray is open. 3. Load the disc for version up. 4. The DVD player enters the F/W version up mode automatically. Fig. c appears on the screen and F

43、ig. d appears on the VFD. The appearance shown in (*2) of Fig. c is described as follows: 5. After programming is finished, the tray opens auto- matically. Fig. e appears on the screen and the checksum in (*3) of Fig. e appears on the VFD. (Fig. f) At this time, no buttons are available. 6. Unplug t

44、he AC cord from the AC outlet. Then plug it again. 7. Turn the power on by pressing the power button and the tray will close. 8. Press 1, 2, 3, 4, and DISPLAY buttons on the remote control unit in that order. Fig. g appears on the screen. 9. Press 3 button on the remote control unit. Fig. h appears

45、on the screen. 10.To finish this mode, press POWER button. F/W Version Up Mode Please insert a DISC for F/W Version Up. EXIT: POWER Fig. a Version Up Mode Screen Fig. b VFD in Version Up Mode Fig. c Programming Mode Screen F/W Version Up Mode VERSION : * Reading.(*2) EXIT: POWER Fig. d VFD in Progra

46、mming Mode (Example) AppearanceNo.State Reading.Sending files into the memory Erasing.Erasing previous version data Programming. 1 2 3Writing new version data Fig. e Completed Program Mode Screen F/W Version Up Mode VERSION : * Completed SUM : 7abc (*3) Fig. f VFD upon Finishing the Programming Mode

47、 (Example) Fig. g model: *Ver: *Region: * 1: VFD TEST 2: TT REPEAT PLAY 3: EEPROM CLEAR 4: MEASUREMENT SERVO 5: DISC READ CHECK 6: MECHA CHECK 7: DISC INFO 8: ERROR RATE EXIT: POWERRETURN: - Fig. h model: *Ver: *Region: * TEST 3: EEPROM CLEAR EEPROM CLEAR: OK EXIT: POWERRETURN: - M M LOADING MOTOR C

48、YLINDER ASSEMBLY SENSOR CBA SENSOR CBA CAPSTAN MOTOR DRUM MOTOR PG SENSOR CONTROL HEAD CL504 CL502 CN504 AC HEAD ASSEMBLY MAIN CBA KEY- 2 RF-SW C-FG C-CONT D-PFG ST-S T-REEL C-F/R KEY- 1 D-V SYNC C-SYNC V-ENV REMOTE-VIDEO CTL(+) RESET C-ROTA D-REC-H D-REC-H D-PB-L REC- SAF-SW PG-DELAY A-MUTE-H A-MUT

49、E-H A-MUTE-H RF-SW D-V SYNC C-SYNC V-ENV TRICK-H C-ROTA END-S IC501 (SERVO/SYSTEM CONTROL) 5 47 56 CTL58 CTL(-)57 28 49 69 62 3 20 27 65 18 78 64 19 41 11 2 24 7 66 67 LM-FWD/REV21 D-CONT29 (DECK ASSEMBLY) Servo/System Control Block Diagram BLOCK DIAGRAMS END-S T-REEL T-REEL ST-S ST-S Q504 Q503 Q501 RESET Q506 SW-POINT AL+5V VR501 TIMER+5V TP506TP505 END-S TP507 D-PB-L TRICK-H SP/LP/SLP 14SP/LP/SLP P-ON-L 22P-ON-L P-DOWN-L 1P-DOWN-L H-A-SW 79H