JVC-THC20-ddts-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MB506 2006/3 DVD DIGITAL THEATER SYSTEM MB50620063 TH-C30J,TH-C30C, TH-C20J,TH-C20C Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 5TROUBLESHOOTING . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 XV-THC30 SP-PWC30 SP-THC40F SP-THC40C SP-THC40S XV-THC20 SP-PWC20 SP-THC20F SP-THC20C SP-THC20S RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB506) SPECIFICATION Center unit (XV-THC30

5、/XV-THC20) *1: This value is measured at System cord CONNECTOR for reference. *2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz) Subwoofer (SP-PWC30) Subwoofer (SP-PWC20) Audio sectionTotal Harmonic Distortion *10.02% Digital

6、input *2DIGITAL IN (DBS) (OPTICAL) : -21 dBm to -15 dBm (660 nm 30 nm) Video sectionVideo SystemNTSC Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video output levelComposite : 1.0 V(p-p)/75 S-video-Y : 1.0 V(p-p)/75 S-video-C : 0.286 V(p-p)/75 Component-Y : 1.0 V(p-p)/75 Component-PB/PR

7、 : 0.7 V(p-p)/75 Video input sensitivity/Impedance (VCR IN)Composite : 1.0 V(p-p)/75 S-video-Y : 1.0 V(p-p)/75 S-video-C : 0.286 V(p-p)/75 USB storageUSB specificationCompatible with the USB 2.0 Full-Speed Compatible deviceMass Storage Class Compatible file systemFAT16, FAT32 Bus power supplyMax. 50

8、0 mA Tuner sectionTuning RangeFM : 87.5 MHz to 108.0 MHz AM : 530 kHz to 1 710 kHz GeneralPower RequirementsAC 120 V , 60 Hz Power Consumption25 W (at operation) 0.6 W (in standby mode) Dimensions (W H D)400 mm 85 mm 316 mm (15-3/4 inches 3-3/8 inches 12-1/2 inches) Mass3.8 kg (8.4 lbs) Amplifier se

9、ctionFront/Center/Surround167 W per channel, RMS at 3 at 1 kHz, with 10 % total harmonic distortion. Subwoofer167 W, RMS at 3 at 100 Hz, with 10 % total harmonic distortion. Speaker sectionSpeaker unit16 cm (6-5/16 inches) Bass-reflex Power Handling Capacity170 W Impedance3 Frequency Range30 Hz to 2

10、00 Hz Sound Pressure Level73 dB/Wm GeneralPower RequirementsAC 120 V , 60 Hz Power Consumption160 W (at operation) 0 W (in standby mode) Dimensions (W H D)170 mm 411 mm 458 mm (6-3/4 inches 16-3/16 inches 18-1/16 inches) Mass11.5 kg (25.4 lbs) Amplifier sectionFront/Center/Surround135 W per channel,

11、 RMS at 4 at 1 kHz, with 10 % total harmonic distortion. Subwoofer135 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion. Speaker sectionSpeaker unit16 cm (6-5/16 inches) Bass-reflex Power Handling Capacity140 W Impedance4 Frequency Range30 Hz to 200 Hz Sound Pressure Level74 dB/Wm GeneralPo

12、wer RequirementsAC 120 V , 60 Hz Power Consumption135 W (at operation) 0 W (in standby mode) Dimensions (W H D)170 mm 411 mm 458 mm (6-3/4 inches 16-3/16 inches 18-1/16 inches) Mass11.5 kg (25.4 lbs) RadioFans.CN 收音机爱 好者资料库 (No.MB506)1-3 Satellite Speakers - SP-XTHC30 Satellite Speakers - SP-XTHC20

13、Designs should be read as follows ; F901 : T1AH 250VF901 : T1AH 250V Full Fuse Replacement Marking FUSE CAUTION Le symbole graphique (Ce symbole signifie fusible de type a fusion lent.) POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ; Marqu

14、age Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES doit etre interprete comme suit ; Graphic symbol mark (This symbol means fast blow type fuse.) FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ; should be read as follows ; F101 :

15、8A 125V F153 : 10A 125V F154 : 10A 125V F101 : 8A 125V F153 : 10A 125V F154 : 10A 125V Full Fuse Replacement Marking FUSE CAUTION Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.) POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE

16、DU MEME TYPE ; Marquage Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES doit etre interprete comme suit ; fast blow type / type a fusion rapide B5203 CN274 B5504 B5218 B5220 FC157 D151 D153 B5605 D514 B5221 FC158 B5701 B5303 FC156 C164 B5224 B5223 B5304 B5222 B5606 B5802 B5305 B

17、5106 C523 C512 D152 FC155 D154 C163 B5302 B5040 D550 D549 B5202 B5001 B5112 B5101 B5901 B5204 B5002 B5205 C503 D506 B5206 B5207 D541 B5208 B5003 B5502 B5402 D601 C3715 R3727 R3720 B5035 C3720 B5036 D3706 B5219 C3716 D3708 Q3704 D3707 B5406 B5102 B5021 B5022 B2214 C3504 B5024 C3502 B5025 C161 C162 D3

18、502 B2215 L2102 R2115 B5043 D3501 C3503 D510 B5041 D551 C3602 C3604 D3602 B5042 D3601 B2023 CN372 C101 FC102 D101 FC101 RY101 D515 D516 D535 CN502 R3719 D3703 C3721 R685 R686 R555 CN151 CN371 CN101 FW501 S901 CN102 FC103FC104 B5301 B5201 HS151 B5225 B5803 B5306 B5505 B5004 B5607 D901 L901 D902 D903

19、PC901 D992 B4701 P901 FC901 FC902 T901 B4301 C911 C908 C904 C992 C916 C912 C907 C905 C909 C903 C914 C913 R921 R951 R901 B4302 B4101 B4202 W914 C902 R922 B4146 TH901 D904 R903 D956 D4811 B4305 R4811 B4306 D4705 R4708 B4802 C4451 C4441 C4431 B4207 B4113 B4403 B4201 HS901 IC901 B4605 B4507 B4407 B4133

20、B4135 B4211 B4320 B4212 B4321 B4138 B4139 B4140 B4141 B4214 B4217 B4149 B4218 R973 Q982 B4150 B4151 R982 Q983 W921 C983 D981 slow blow type / type a fusion lent (No.MB506)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MB506) S

21、ECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the top cover (See Fig.1 and 2) (1) Remove the four screws A (both side) attaching the top cover. (See Fig.1) (2) Remove the three screws B attaching the top cover from back side. (See Fig.2) Fig.1 Fig.2 A A B F G J G (No.MB506)1-9 3.1.2Removing the fr

22、ont panel assembly (See Fig.3 to 5) (1) Disconnect the card wire from front board connected CN450 and CN451 of main board. (See Fig.3) (2) Disconnect the card wire from operation board connected CN457 of main board. (See Fig.3) (3) Remove the one screw C attaching the grand wire of front board. (See

23、 Fig.3) (4) Remove the two screws D attaching the front panel from bottom side. (See Fig.4) (5) Disengage the hook a of bottom side and hook b of both side of front panel assembly. (See Fig.4 and 5) Fig.3 Fig.4 Fig.5 C CN451CN457CN450 D a b b 1-10 (No.MB506) 3.1.3Removing the DVD mechanism assembly

24、(See Fig. 6 and 7) (1) Disconnect the card wire from DVD mechanism assembly connected to CN402, CN403 and CN404 of main board. (See Fig.6) (2) Disconnect the connector wire from USB jack board con- nected to CN811 of DVD module board. (See Fig.7) (3) Remove the four screws E attaching the DVD mechan

25、ism assembly. (See Fig.6) Fig.6 Fig.7 3.1.4Removing the tuner pack (See Fig.2 and 8) (1) Disconnect the card wire from tuner pack connected to CN410 of main board. (See Fig.8) (2) Remove the two screws F attaching the tuner pack. (See Fig.2) Fig.8 CN402 CN403 CN404 E E CN811 CN410 (No.MB506)1-11 3.1

26、.5Removing the audio and digital input board (See Fig.2 and 9) (1) Remove the two screws G attaching the audio and digital input board. (See Fig.2) (2) Disconnect the card wire from main board connected to CN102. (See Fig.9) (3) Disconnect the connection board from CN101, and then shift to direction

27、 the arrow and take off the audio and digital input board. (See Fig.9) Fig.9 3.1.6Removing the USB jack board (See Fig.10) (1) Remove the one screw H attaching the USB jack board. (See Fig.10) Fig.10 CN102 CN101 H 1-12 (No.MB506) 3.1.7Removing the main board (See Fig.2 and 11) (1) Remove the five sc

28、rews J attaching the main board from back side. (See Fig.2) (2) Remove the four screws K attaching the main board. (See Fig.11) Fig.11 3.1.8Removing the operation board (See Fig.12 and 13) (1) Pull out the volume knob. (2) Remove the one screw L attaching the volume. (See Fig.12) (3) Remove the one

29、screw M attaching the bracket board. (See Fig.13) (4) Remove the three screws N attaching the operation board. (See Fig.13) 3.1.9Removing the front board (See Fig.13) (1) Remove the seven screws P attaching the front board. Fig.12 Fig.13 K L P N M (No.MB506)1-13 3.2Subwoofer 3.2.1Removing the amplif

30、ier assembly (See Fig.1 to 4) (1) Remove the eight screws A attaching the amplifier assem- bly from bottom side. (See Fig.1) (2) Remove the two screws B, one screw C and six screws D attaching the rear panel. (See Fig.2) (3) Disconnect the connector wire from fan motor connected to CN371. (See Fig.3

31、) (4) Pull out the amplifier assembly and disconnect the connec- tor wire from speaker connected to CN274. (See Fig.4) Fig.1 Fig.2 Fig.3 Fig.4 A A B C D D D CN371 CN274 1-14 (No.MB506) 3.2.2Removing the mother board (See Fig.5 and 6) (1) Disconnect the connector wire from power transformer connected

32、 to CN102 and CN151. (See Fig.5) (2) Disconnect the power cord connected to CN101. (See Fig.5) (3) Remove the four screws E attaching the heat sink bracket. (See Fig.5) (4) Remove the two screws F attaching the mother board. (See Fig.5) (5) Disconnect the connector connected to amplifier board CN372

33、, CN501 and CN502. (See Fig.6) Fig.5 Fig.6 3.2.3Removing the amplifier board (See Fig.7) (1) Remove the nine screws G attaching the amplifier board. Fig.7 CN101 CN102 CN151 E E F CN372CN501CN502 G (No.MB506)1-15 3.2.4Removing the heat sink (See Fig.8 and 9) (1) Remove the three screws H attaching th

34、e heat sink from bottom side of amplifier board. (See Fig.8) (2) Remove the four screws J attaching the power IC. (See Fig.9) Fig.8 Fig.9 H J 1-16 (No.MB506) 3.3DVD mechanism section 3.3.1Removing the DVD module board (See Fig.1) (1) Disconnect the card wire connected to CN451, CN452, CN453, CN101 a

35、nd CN102 of DVD module board. (See Fig.1) (2) Remove the two screws A attaching the DVD module board. (See Fig.1) Fig.1 3.3.2Removing the PWB bracket and wire holder (See Fig.2) (1) Remove the two screws B attaching the wire holder. (2) Remove the one screw C attaching the PWB bracket. Fig.2 AA CN10

36、1CN452 CN201CN453 CN451 CPWB BKTWire holder B (No.MB506)1-17 3.3.3Removing the tray assembly (See Fig.3 to 7) (1) Remove the two screws D from the top cover and release the two joints a on both sides of the body. (See Fig.3) (2) Remove the top cover with the two rods attached to the top cover and li

37、fter assembly respectively. (See Fig.4) (3) Remove the open detect lever on the left side of the body. (See Fig.5) (4) Push part b of the slide (R) assembly on the right side of the body to unlock the tray assembly. Draw out the trays to- ward the front. (See Fig.6) Attention: The tray can be locked

38、 if all tray assemblies are at- tached. (5) From top of the body, move the stopper tab c in the direc- tion of the arrow and release. Pull out the tray assemblies from the body. (See Fig.6 and 7) Caution: Remove the tray assembly from top tray 5 in order. Attention: When reattaching the sub tray of

39、the tray assembly, or when removing the DVD mechanism inside, refer to another section. Fig.3 Fig.4 Fig.5 Fig.6 Fig.7 Top cover Lifter assembly Rod D aa D a RodTop cover Lifter assembly a Open detect lever b Tray assembly (Tray 5) c 1-18 (No.MB506) 3.3.4Removing the motor board (See Fig.8) (1) Remov

40、e the two screws D attaching the motor board. (2) Remove the spacer fixing the motor board and tray switch- board, and disconnect the connector CN2 on the motor board. (3) Disconnect the card wire from connector CN1 on the motor board. Caution: When reconnection the card wire, let the card wire thro

41、ugh the slot d of the motor board and attach it to bottom of the body us- ing a double face tape. Fig.8 3.3.5Removing the DVD tramecha assembly (See Fig.9) (1) Remove the three screws E attaching the DVD tramecha assembly. Fig.9 Double DD d CN1 CN2 Soldering point Motor face tape Card wire DVD Trame

42、cha assembly E E E (No.MB506)1-19 3.3.6Removing the pickup (See Fig.10 and 11) (1) Remove the one screw F and G attaching the spring hold- er. (See Fig.10) (2) Lift up the shaft from the tramecha assembly. (See Fig.10) (3) Remove the two screws H attaching the lack. (See Fig.11) Fig.10 Fig.11 Pickup

43、 assembly Mecha base e F G Shaft Spring holder Shaft Spring holder H 1-20 (No.MB506) 3.3.7Removing the side (L) (See Fig.12 to 14) (1) Remove the two screws J attaching the side (L). (See Fig.12) (2) From the side of body, remove the spacer fixing the tray switch board and motor board. Disconnect co

44、nnector CN3 on the tray switch board and detach the side (L) upward. (See Fig.13) (3) Remove the one screw K attaching the tray switch board. (See Fig.14) (4) Push the joint tab d of the side (L) in the direction of the ar- row and remove the tray switch board outward, then re- lease joint f. (See F

45、ig.14) Fig.12 Fig.13 Fig.14 Side (L) J J Spacer CN3 Side (L) J J e f K Side (L) Tray switch board (No.MB506)1-21 3.3.8Removing the side (R) assembly (See Fig.15 to 19) (1) Remove the three screws L attaching the side (R) assem- bly. (See Fig.15) (2) Remove the spring attached to part g of the hook o

46、n the right side of the body. (See Fig.16) (3) Push and release the two tabs h of the gear cover through the notches inside the side (R) assembly. Remove the gear cover outward. (See Fig.17) (4) From top of the body, turn the 1 gear clockwise to move the elevator cam rearward. Move the two slots k a

47、nd joint m of the elevator cam as shown Fig.18 and remove the elevator cam outward. (5) Remove the three screws M and detach the side (R) up- ward. (See Fig.19) Caution: When reattaching the side (R) assembly, make sure to fit the shaft into the slot of the select lever. Fig.15 M Side (R) assembly M

48、 Mh 1-22 (No.MB506) Fig.16 Fig.17 Fig.18 Fig.19 Side (R) assembly Sprihg Gear cover Elevator com g 1 gear h Side (R) assembly Elevator cam Springj k k m Side (R) assembly M M (No.MB506)1-23 3.3.9Removing the lifter assembly (See Fig.20 to 24) (1) From top of the body, turn the 1 gear clockwise to mo

49、ve the lifter assembly upward. (See Fig.20) (2) From top of the body, turn 2 gear clockwise to move the hook toward the front until it stops. (See Fig.20) (3) Move the hook stopper in the direction of the arrow while pushing the tab n of the hook stopper to unlock it. Release four joints p to detach from rack holder. Release the rod from part q. (See Fig.21 and 22) (4) Turn 1 gear clockwise again to move the lifter assembly up- ward. (See Fig.23) (5) Remove the lifer assembly from the body upward at posi- tion r where the four