JVC-RXF31S-hccc-sm维修电路原理图.pdf

《JVC-RXF31S-hccc-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-RXF31S-hccc-sm维修电路原理图.pdf（65页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB449 2005/7 HOME CINEMA CONTROL CENTER MB44920057 RX-F31S Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 5TROUBLESHOOTING . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 Area suffix A - Australia US - Singapore UF - China UJ - U.S.Military RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB449) SPECIFICATION *1: Measured on AC 110 V, 127 V, 220 V, and 240 V. *2: Corresponding to

5、Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz). Designs and specifications are subject to change without notice. AmplifierOutput Power At stereo operationFront channels100 W*1 per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total har- monic

6、 distortion. At surround operationFront channels100 W*1 per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion. Center channel100 W*1, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distor- tion. Surround channels100 W*1 per channel, m

7、in. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion. Surround back channel100 W*1, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distor- tion. AudioAudio Input Sensitivity /Impedance DVR/DVD (DVD MULTI), VCR, DBS, TV330 mV/47 k Audio Input (DIGI

8、TAL IN)*2 Coaxial: DIGITAL IN 1(DVR/DVD)0.5 V(p-p)/75 Optical: DIGITAL IN 2(DBS), 3(VCR)-21 dBm to -15 dBm (660 nm 30 nm) Audio Output LevelDVR, VCR, MONITOR OUT330 mV Signal-to-Noise Ratio (66 IHF/DIN)80 dB/62 dB Frequency Response (8 )20 Hz to 20 kHz (1 dB) Bass Boost+4 dB 1 dB at 100 Hz Equalizat

9、ion (at DSP operation) Center frequency63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz Control range8 dB VideoVideo Input Sensitivity/ Impedance Composite video: DVR/DVD, VCR, DBS1 V(p-p)/75 S-video: DVR/DVD, VCR, DBSY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.286 V(p-p)/75 Component: DVR/DVD, VCRY (lu

10、minance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Video Output Level/ Impedance Composite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONITOR OUTY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.286 V(p-p)/75 Component: MONITOR OUTY (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Synchro

11、nizationNegative FM tuner (IHF) Tuning Range87.50 MHz to 108.00 MHz Usable SensitivityMonaural12.8 dBf (1.2 V/75 ) 50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 ) Stereo37.5 dBf (20.5 V/75 ) Stereo Separation at OUT(REC)35 dB at 1 kHz AM tunerTuning Range531 kHz to 1 710 kHz (at 9 kHz interva

12、ls) 530 kHz to 1 710 kHz (at 10 kHz intervals) GeneralPower RequirementsAC 110 V/127 V/220 V/230 V - 240 V , adjust- able with the voltage selector, 50 Hz/60 Hz Power Consumption120 W (at operation) 5 W (in standby mode) Dimensions (W H D)435 mm 70 mm 317.2 mm Mass6.3 kg RadioFans.CN 收音机爱 好者资料库 (No.

13、MB449)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer

14、. Replacement parts must be identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or

15、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 characteristics. These characteris- tics are ofte

16、n not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Ele

17、ctrical 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 charac- teristics as the recommended replacement parts shown in the Parts List of Service Ma

18、nual 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 shock and fire hazard. When se

19、rvice is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the p

20、roduct (an- tenna 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 the AC line cord directly into the AC outlet. Using a Lea

21、kage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cor

22、d directly into the AC outlet. Use an AC voltmeter having, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed metal part and a known good earth ground. Measure the AC voltage across the resistor with t

23、he AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed

24、0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2Warning (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 maintained. (3) Repairs must be made in ac

25、cordance 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. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore

26、, pay attention to such burrs in the case of pre- forming repair of this system. 1.4Critical parts for safety 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 the resistor ( ), diode ( ) and

27、ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTME

28、TER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE 1-4 (No.MB449) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB449)1-5 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Figs.1 and 2

29、) (1) From the both sides of the main body, remove the four screws A attaching the top cover. (See Fig.1) (2) From the back side of the main body, remove the five screws B attaching the top cover. (See Fig.2) (3) Remove the top cover in the direction of the arrow. (See Fig.1.) Fig.1 Fig.2 A Top cove

30、r B B Top cover B 1-6 (No.MB449) 3.1.2Removing the front panel assembly (See Figs.3 and 4) Remove the top cover. (1) From the top side of the main body, remove the tie bands bundling the wires. (See Fig.3.) Reference: After reassembling, bundle the wires with the new tie bands as before. (See Fig.3.

31、) (2) Disconnect the parallel wire from the connector CN412 on the regulator connect board. (See Fig.3) (3) Disconnect the wire from the connector CN451 on the input mother board. (See Fig.3) (4) Remove the four screws C and screw C attaching the front panel assembly. (See Fig.3) Reference: When att

32、aching the screw C, attach the earth wires with it as before. (See Fig.3.) (5) From the bottom side of the main body, remove the four screws C attaching the front panel assembly. (See Fig.4) (6) From the both and bottom sides of the main body, release the joints (a, b) and remove the front panel ass

33、embly in the direction of the arrow. (See Figs.3 and 4) Fig.3 Fig.4 3.1.3Removing the rear panel (See Fig.5) Remove the top cover. (1) From the back side of the main body, remove the strain re- lief from the rear panel in the direction of the arrow and re- move the power cord. (2) Remove the twenty-

34、nine screws D attaching the rear panel. Fig.5 CCC Front panel assembly C Regulator connect board Tie bands Earth wiresCN451 CN412Input mother board aa CC Front panel assembly b Strain relief D Rear panel Power cord D D (No.MB449)1-7 3.1.4Removing the tuner (See Fig.6) Remove the top cover. (1) From

35、the top side of the main body, disconnect the card wire from the connector CN1 on the tuner. (2) From the back side of the main body, remove the two screws E attaching the tuner to the rear panel and take out the tuner. 3.1.5Removing the DSP board (See Fig.6) Remove the top cover. (1) From the back

36、side of the main body, remove the five screws E attaching the DSP board to the rear panel. (2) From the top side of the main body, disconnect the DSP board from the vol IC board while releasing the claw c of the connector CN601 on the DSP board. Note: When releasing the claw c, take care not to brea

37、k it. (3) Take out the DSP board and disconnect the card wire from the connector CN602 on the forward side of the DSP board. Reference: When attaching the DSP board, align the section d of the speaker relay board in hole on the DSP board. Fig.6 3.1.6Removing the master clock board (See Fig.7) Remove

38、 the top cover. (1) From the top side of the main body, remove the screw F. Reference: When attaching the screw F, attach the holder with it as before. (2) Disconnect the connector CN771 on the master clock board from the main amplifier board in an upward direction. 3.1.7Removing the gate drive-2 bo

39、ard (See Fig.7) Remove the top cover. From the top side of the main body, disconnect the connector CN311 on the gate drive-2 board from the main amplifier board in an upward direction. 3.1.8Removing the S.S. setup board (See Fig.7) Remove the top cover. (1) From the top side of the main body, remove

40、 the tie band fix- ing the wire. Reference: After reassembling, fix the wire with a new tie band as before. (2) Disconnect the wire from the connector CN725 on the S.S. setup board. (3) Disconnect the S.S. setup board from the main amplifier board while releasing the claw e of the connector CN727 on

41、 the main amplifier board. Note: When releasing the claw e, take care not to break it. Fig.7 Tuner CN1 CN601 CN602 DSP board Speaker relay board d Rear panel E Rear panel E CN601 DSP board Vol IC board c CN771CN311 CN725 Gate drive-2 board S.S. setup board Holder Main amplifier board Master clock bo

42、ard Tie band F CN727 Speaker terminal board S.S. setup board e 1-8 (No.MB449) 3.1.9Removing the vol sel board (See Fig.8) Remove the top cover. (1) Remove the strain relief from the rear panel in the direction of the arrow. (2) From the back side of the main body, remove the two screws G attaching t

43、he vol sel board to the rear panel. (3) From the top side of the main body, disconnect the wires from the connectors (CN204, CN205) on the vol sel board. (4) Take out the vol sel board from the main body and remove the wires from the soldered sections f on the reverse side of the vol sel board. 3.1.

44、10 Removing the audio input/output board (See Fig.8) Remove the top cover. (1) From the back side of the main body, remove the two screws G attaching the audio input/output board to the rear panel. (2) Disconnect the audio input/output board from the video connect board while releasing the claw g of

45、 the connector CN516 on the audio input/output board. Note: When releasing the claw g, take care not to break it. (3) Disconnect the card wires from the connectors (CN508, CN514) on the forward side of the audio input/output board. 3.1.11 Removing the primary board (See Fig.8) Remove the top cover.

46、(1) From the top side of the main body, disconnect the power cord from the connector CN203 on the primary board. (2) Disconnect the wires from the connector CN218 on the pri- mary board. (3) Remove the six screws H attaching the primary board on the chassis base assembly. (4) Take out the primary bo

47、ard from the main body and remove the wires from the soldered sections h on the reverse side of the primary board. Fig.8 3.1.12 Removing the power transformer (See Fig.9) Remove the top cover. (1) From the top side of the main body, remove the tie bands bundling the wires. Reference: After reassembl

48、ing, bundle the wires with the new tie bands as before. (2) Disconnect the wires from the connectors (CN201, CN702) on the main amplifier board. (3) Disconnect the wire from the connector CN202 on the pri- mary board. (4) Remove the four screws J attaching the power transformer on the chassis base a

49、ssembly. Fig.9 Primary board Vol sel board CN203 Power cord Stain relief H H CN218 CN508CN205 CN204 Audio input/output board CN514 Chassis base assembly H h f Video connect board CN516 Audio input/output board g Strain reliefRear panel GG J J J Power transformer CN201 CN702 Tie bands Chassis base assembly Main amplifier board Vol sel board CN204 CN205 (No.MB449)1-9 3.1.13 Removing the fan motor (See Fig.10) Remove the top cover. (1) Form the top side