JVC-THA35-ddcs-sm维修电路原理图.pdf

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1、TH-A35 TH-A35 SERVICE MANUAL DVD DIGITAL CINEMA SYSTEM Contents COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No. 22020 Jun. 2003 Safety precautions - 1- 2 Preventing static electricity - 1- 3 Important for laser products - 1- 4 Disassembly method - 1- 5 Description of major ICs - 1- 15 Wiring connec

2、tion - 1- 20 Area Suffix J . U.S.A. C . Canada COMPACT SUPER VIDEO D I G I T A L S U R R O U N D D I G I T A L E X P R O L O G I C VOLUME PHONES DSPSORROUNDSOURCE STANDBY STANDBY/ON RadioFans.CN 收音机爱 好者资料库 TH-A35 1-2 Warning !CAUTION Good earth ground Place this probe on each exposed metal part. AC

3、VOLTMETER (Having 1000 ohms/v 1500 10W olts, or more sensitivity) 0.15 F AC TYPE Safety Precautions 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unle

4、ss authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product shoul

5、d not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related character

6、istics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the P

7、arts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ! ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown

8、 in the Parts List of Service Manual may create shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric

9、 shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform

10、 an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check. ? Plug t

11、he AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (

12、r.m.s.) ? Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC- type capacitor between an exposed metal part and a known good earth

13、 ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repe

14、at each measurement. Voltage measured Any must not exceed 0.75 V AC(r.m.s.). This corresponds to 0.5 mA AC(r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to ensure that these safety standards are

15、 maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage. Burrs formed during molding may be left over on some pa

16、rts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. RadioFans.CN 收音机爱 好者资料库 TH-A35 1-3 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy

17、 the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper

18、grounding in the area where repairs are being performed. 1.1.1. Ground the workbench 1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. 1.1.2. Ground yourself 1. Use an anti-static wrist

19、 strap to release any static electricity built up in your body. 1.1.3. Handling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to the

20、ir original condition. (Refer to the text.) 2. Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.2. Handling the traverse unit (optical pickup) 1. Do not subject the traverse unit (optical pick

21、up) to strong shocks, as it is a sensitive, complex unit. 2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be ca

22、reful not to take too long a time when attaching it to the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. Conductive material (conductive sheet) or

23、 iron plate (caption) Anti-static wrist strap 1M TH-A35 1-4 1. CLASS 1 LASER PRODUCT 2. CAUTION : Visible and invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam. 3. CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the

24、 Laser Unit. Replace the complete Laser Unit if it malfunctions. 4. CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous

25、 to defeat the safety switches. Important for laser products REPRODUCTION AND POSITION OF LABELS CLASS 1 LABEL WARNING LABEL 5. CAUTION : If safety switches malfunction, the laser is able to function. 6. CAUTION : Use of controls, adjustments or performance of procedures other than those specified h

26、erein may result in hazardous radiation exposure. !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO : Avattaessa ja suojalukitus

27、 ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. ADVARSEL : Usynlig laserstrling ved pning, nr sikkerhetsbryteren er avslott. Unng utsettelse for strling. CLASS 1

28、 LASER PRODUCT CLASS 1 LASER PRODUCT TH-A35 1-5 2. PIN CONFIGURATION Disassembly method ?Removing the cabinet top ?Removing the tray Door ?Removing the cabinet front ?Removing the TUNER and panel rear ?Removing the MPEG BOARD ?Removing the MAIN BOARD ?Removing FAN ?Removing the Thermal - Regifer ?Re

29、moving the VCD mechanism base assembly ?Removing PWB, AMP ?Removing Power , fruformer ?Removing the FRONT PWB & LED PWB Commence disassembly of this set by removing the main units and then proceed to the components and assemblies inside the units. TH-A35 1-6 ?Removing the cabinet top (See Fig.1) 1.

30、Unscrew the 6 serew A 2. Lift the cabinet top by holding the two sides of it, while moving it upward and backward. ?Removing the Tray Door (See Fig.2) 1. Eject the disc tray. (Rotate the screw B counter - clockwise if no supply) 2. Lift up the tray door in the indicated direction Fig.1 CLASS 1 LASER

31、 PRODUCT Right coverLeft cover Top cover Rear cover Fig.2 B TH-A35 1-7 Fig.3 Fig.4 Fig.5 ?Removing the cabinet front (See Fig.3) Caution You must ensure the TRAY door isnt its place before you remove the panel front from body. 1. Unscrew the serew 2 C & 2 D. 2. Pull the panel front toward yourself w

32、hile pressing 5 stoppers to disengage. ?Removing the TUNER and panel rear (See Fig.4) 1. Unserew the screw H form mpeg board unit and unit and main board unit. 2. Unserw the screw K form body. 3. Take the supply cord out of panel rear. 4. Remove teh panel rear with tuner . ?Removing the MPEG BOARD (

33、See Fig.5) Caution Mpeg board may be taken out only when the panel rear and Tunet have been taken away. 1. Pull the cable connetor mpeg board. 2. Unscrew the screw M. 3.Separate the mpeg board from main board vertically. D C STOPPER STOPPER STOPPER STOPPER STOPPER C D M CLASS 1 LASER PRODUCT H K TH-

34、A35 1-8 ? Removing the MAIN Board ( See Fig.6 & 7 ) CautionMain board may be taken out when the mpeg board has been taken away. 1. Force the PCB spacer Q to exit the holes of main board. 2. Unscrew the screw P. 3.Unscrew the screw R then you can remove the main board with heat sink. 4.Untie or open

35、connecters to power transformer, PWB,AMP, DVD - mech. ? Removing FAN (See Fig.8) 1.Unscreew 3 screws R with HOLDER, pull out connector from PWB, main. 2.Unscrew 2 screws S from HLDR. ? Removing the Thermal - Regifer (See Fig.9) 1.Unscreew the screws though power IC and thermal- HOLDER. 2.Pull wire o

36、f thermal - register from PWB main. P Q Fig. 6 Fig. 7 Fig. 9 Fig. 8 R S PULL TH-A35 1-9 ? Removing the CD mechanism base assembly (See Fig.10) ? Prior to performing the following procedure, remove the cabinet front assembly. 1. Disconnect the harnesses from connector CN191 and CN192 on the main boar

37、d and release them from the cord stopper respectively. 2. Remove the four screws M attaching the transformer assembly. ? Removing PWB,AMP (See Fig.11) 1. Unscrew 4 screws L. 2. Pull out connecter from PWB, AMP. ? Removing Power, frusformer (See Fig.11) 1. Unscrew 4 screws N 2. Untie wire connecter t

38、o PWB, MAIN. Fig. 11 Fig. 10 TH-A35 1-10 ? Removing the front PWB & Led, PWB (See Fig.12-13) ? Prior to performing the following procedure, remove the front panel assembly. 1. Remove the seven screws X and 3 screws attaching the front panel board inside the front panel assembly. 2. Push out KNOB, VO

39、LUME through PWB, FR. Fig. 13 Fig. 12 TH-A35 1-11 1. Pin layput 2. Block diagram Description of major ICs ?STK402-950 ( U701 ) : 5 channels AF power amplifier. 4200 (unit: mm) 3.6 (12.0) 2.0 16.5 21.0 32.0 27.34.0 23x2.0=46.0 0.5 5.5 0.4 2.9 8.5 124 78.0 70.0 TH-A35 1-12 2. PIN CONFIGURATION ?WM8770

40、 ( U1 ) : 8-channel code c & volume control 1. TH-A35 1-13 1.Block Diagram ? UPD78F0034A ( IC 401 ) : CPU TH-A35 1-14 2.Outline of Function TH-A35 1-15 1. BLOCK DIAGRAM UPD 16315 ( IC904 ): VFD control ler / driver Description of major ICs TH-A35 1-16 2. Pin Layout ( AK4112BVF ) ?AK4112 ( U17 ) : Di

41、gital audio receiver 1. BLOCK DIAGRAM TH-A35 1-17 ? M29W160DB ( U12 ) : 16M Flash memory .Pim layout DQ3 DQ9 DQ2 A6 DQ0 W A3 RB DQ6 A8 A9 DQ13 A17 A10DQ14 A2 DQ12 DQ10 DQ15A1 VCC DQ4 DQ5 A7 DQ7 NC NC AI03844 M29W160DT M29W160DB 12 1 13 2425 36 37 48 DQ8 NC A19 A1 A18 A4 A5 DQ1 DQ11 G A12 A13 A16 A11

42、 BYTE A15 A14 VSS E A0 RP VSS TH-A35 1-18 ?2a3020 ( IC 701 ): DC - DC Regulator ?LX171/LX1711 ( IC603 ) : 1.5V Internal Regulators Oscillator 40 / 400 KHz 2 2.30/2.53V 0.7V 1uA 3 4 M 2 1 0 o h m ( VIN 8 SYNC 7 EN 5FB 6COMP 1.22V Shutdown Comparator Frequency Foldback Comparator Error Am plifier gm =

43、 630uM/Volt Lockout Comparator Current Sense Amp llfler Current Comparator G N D V s w S B 1 0.7V SV C L K S R Q Q Slope Compensation SLEEP VREF V25 CN PVDD CP P+ N+ P- N- FAOUT FBK- FBK+ VDD IS- CLOCK RPWM CPWM EAOUT EAIN INAMPOUT INPUT - INPUT + MUTE UVLO & REFERENCE OUTPUT DRIVERS & LOGIC FAULT T

44、IMER 5V Reference 26 4 1 10 CLK OSC SYNC + - 220mV PVDD MUX MUTE MUTE 7 14 13 9 11 8 6 5 28 27 25 15 17 FEEDBACK AMP ERROR AMP CURRENT SENSE INPUT AMP 16 24 23 22 21 20 S R Q Q CLK 5V Reference 18 Class-D mono power amplifier controller TH-A35 1-19 ? IR2110 ( IC603,604 ): Low and nigh side driver Fu

45、nctional Block Diagram ? MC 14053B ( U21 ): digitally - controlled analog swith Pin layout VB SD LIN VDD PULSE GEN R S Q VSS UV DETECT DELAY HV LEVEL SHIFT VCC PULSE FILTER UV DETECT VDD/VCC LEVEL SHIFT VDD/VCC LEVEL SHIFT LO VS COM R SQ R S RQ HIN HO YI Y0 Z1 Z0 INH VEE VDD Y X X1 X0 A B CVSS Z TH-

46、A35 1-20 Wiring connection No.22020SCH Jun. 2003 COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. TH-A35 SCHEMATIC DIAGRAMS Block diagram Standard schematic diagrams Printed circuit boards 2-1 2-2 2-202-31 Contents CD-ROM No.SML200306 TH-A35 DVD DIGITAL CINEMA SYSTEM Area Suffix J . U.S.A. C . Canada CO

47、MPACT SUPER VIDEO D I G I T A L S U R R O U N D D I G I T A L E X P R O L O G I C VOLUME PHONES DSPSORROUNDSOURCE STANDBY STANDBY/ON TH-A35 In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as th

48、e resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. (This regulation does not correspond to J and C version.) TH-A35 2-1 ABC 1 2 3 4 5 Block Diagram TH-A35 2-2ABCD 1 2 3 4 5 Standard schematic diagrams AUDIO CODEC & AUDIO/VIDEO POST SPDIF-IN ERF RX1 RSTO MD MC ML_4112 MCLK_4112 SEL-4112 AIN1 ALRCLKI MCLK_4112 MDO_4112 ML-8746 AIN0 AMCLK/8770 MCTUN-INR AOUT1 PH-L TUN-INLMD ALKCLK