JVC-RXE12B-hccc-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB387 2005/2 HOME CINEMA CONTROL CENTER MB38720052 RX-E11S,RX-E12B TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB387) SPECIFICATION * Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency-32 kHz, 44.1 kHz, 48 kHz). Design and specifications are subject to change without notice. Amplifier Output PowerAt stereo operationFront channels60 W per channel, min. RMS, both channels driven into 6 at 1 kHz with no more than 10% total harmon- ic distortion. (IEC268-3) At surround operationFront channels60 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion. Center channel60 W, min. RMS, driven into 6 at 1 kHz, with no more than 10% total harmonic distortion. Surround channels60 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 10% total harmonic distortion. AudioAudio Input Sensitivity/Im- pedance DVR/DVD, VCR, TV, VIDEO170 mV(p-p)/47 k Audio Input (DIGITAL IN)* Coaxial: DIGITAL IN 1(DVR/DVD)0.5 V(p-p)/75 Optical: DIGITAL IN 2(VIDEO)-21 dBm to -15 dBm (660 nm 30 nm) Audio Output LevelDVR/DVD, VCR, TV170 mV Signal-to-Noise Ratio (66 IHF/DIN)87 dB/62 dB Frequency Response (6 )20 Hz to 20 kHz (1 dB) Bass Boost+4 dB 1 dB at 100 Hz EqualizationCenter frequency63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz Control range8 dB VideoVideo Input Sensitivity/Im- pedance Composite video:DVR/DVD, VCR, TV, VIDEO 1 V(p-p)/75 S-video:DVR/DVD, VCRY (luminance):1 V(p-p)/75 C (chrominance, burst):0.3 V(p-p)/75 RGB:DVR/DVD, VCR0.7 V(p-p)/75 Component:DVR/DVDY (luminance):1 V(p-p)/75 PB, PR:0.7 V(p-p)/75 Video Output Level/Im- pedance Composite videoDVR/DVD, VCR, TV1 V(p-p)/75 S-video: TVY (luminance):1 V(p-p)/75 C (chrominance, burst):0.3 V(p-p)/75 RGB:TV0.7 V(p-p)/75 Component:MONITOR OUTY (luminance):1 V(p-p)/75 PB, PR:0.7 V(p-p)/75 SynchronizationNegative FM tuner (IHF) Tuning Range87.50 MHz to 108.00 MHz Usable Sensitivity Monaural17.0 dBf (1.95 V/75 ) 50 dB Quieting Sensitivity Monaural21.3 dBf (3.2 V/75 ) Stereo41.3 dBf (31.5 V/75 ) Stereo Separation at Rec Out35 dB at 1 kHz AM (MW) tuner Tuning Range522 kHz to 1 629 kHz General Power RequirementsAC 230 V , 50 Hz Power Consumption120 W (at operation) 1 W (in standby mode) Dimensions (W H D)435 mm 70 mm 325 mm Mass5.6 kg RadioFans.CN 收音机爱 好者资料库 (No.MB387)1-3 SECTION 1 PRECAUTIONS 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. 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 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 often 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. 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 charac- teristics as the recommended replacement parts shown 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 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 reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (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 Leakage 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 cord 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 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 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 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 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. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, 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 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 VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE 1-4 (No.MB387) 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace- ment parts must be identical to those used in the original circuits. (2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and 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 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. 1.5.1Warning (1) Service should be performed by qualified personnel only. (2) This equipment has been designed and manufactured to meet international safety standards. (3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (4) Repairs must be made in accordance with the relevant safety standards. (5) It is essential that safety critical components are replaced by approved parts. (6) If mains voltage selector is provided, check setting for local voltage. Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. (No.MB387)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB387) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Figs. 1 and 2) (1) From the both sides of the main body, remove the two 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) Fig.1 Fig.2 Top cover A Top cover B (No.MB387)1-7 3.1.2Removing the front panel assembly (See Figs. 3 to 5) Rremove the top cover. (1) From the top side of the main body, disconnect the wire from the connector CN412 on the regulator board. (See Fig.3) Reference: After reassembling, fix the wires with the wire holders as before. (See Fig.3.) (2) Disconnect the wire from the connector CN421 on the con- nection 2 board. (See Fig.3) (3) Remove the two screws C and screw C attaching the front panel assembly. (See Fig.3) Reference: When attaching the screw C, attach the earth wires with them. (See Fig.3.) When attaching the screw C, attach a wire holder with it. (See Fig.3.) (4) From the bottom side of the main body, remove the four screws D attaching the front panel assembly and release the joint a. (See Fig.4) (5) From the both sides of the main body, release the joints b and take out the front panel assembly in the direction of the arrow. (See Fig.5) Fig.3 Fig.4 Fig.5 3.1.3Removing the rear panel (See Fig. 6) Remove the top cover. (1) From the back side of the main body, remove strain relief from the rear panel in the direction of the arrow. (2) Remove the nineteen screws E attaching the rear panel. Fig.6 Front panel assembly Connection 2 board Regulator board CN412 CN421 CCC Wire holders Earth wire Earth wire Wire holder Front panel assembly a D Front panel assembly b Rear panel E E Rear panel 1-8 (No.MB387) 3.1.4Removing the tuner (See Figs. 7 and 8) Remove the top cover. (1) From the top side of the main body, disconnect the card wire from the connector CN1 on the tuner. (See Fig.7) (2) From the back side of the main body, remove the two screws F attaching the tuner to the rear panel. (See Fig.8) 3.1.5Removing the PAL prg board (See Figs. 7 and 8) Remove the top cover. (1) From the back side of the main body, remove the four screws G attaching the PAL prg board to the rear panel. (See Fig.8) (2) From the top side of the main body, remove the tie band fix- ing the power cord. (See fig.7.) Reference: After reassembling, fix the power cord with a new tie band as before. (See Fig.7.) (3) Take out the PAL prg board and disconnect the card wire from the connector CN751 on the forward side of the PAL prg board. (See Fig.7) 3.1.6Removing the DSP board (See Figs. 7 and 8) Remove the top cover. (1) From the back side of the main body, remove the two screws H attaching the DSP board to the rear panel. (See Fig.8) (2) From the top side of the main body, disconnect the connec- tor CN601 on the DSP board from the connection 1 board. (See Fig.7) (3) Take out the DSP board and disconnect the card wire from the connector CN602 on the forward side of the DSP board. (See Fig.7) 3.1.7Removing the S.S.S. board (See Fig 7) Remove the top cover. (1) From the top side of the main body, remove the tie band and disconnect the wire from the connector CN725 on the S.S.S. board. Reference: After attaching the S.S.S. board, fix the wire with a new tie band as before. (2) Disconnect the connector CN728 on the S.S.S. board from the SPK term. board. (3) Take out the S.S.S. board. Fig.7 Fig.8 Tie band DSP board DSP board PAL prg board S.S.S. board CN1 Tuner CN751 CN601CN602 CN728 CN725 SPK term. board Tie band Power cord Connection 1 board CN601 Rear panel JHKFG (No.MB387)1-9 3.1.8Removing the SPK term. board (See Figs. 8 and 9) Remove the top cover, DSP board and S.S.S. board. (1) From the back side of the main body, remove the two screws J attaching the SPK term. board to the rear panel. (See Fig.8) (2) From the top side of the main body, disconnect the wires from the connectors (CN301, CN801) on the SPK term. board. (See Fig.9) (3) Take out the SPK term. board. Fig.9 3.1.9Removing the SCART board (See Figs. 8 and 10) Remove the top cover and DSP board. (1) From the back side of the main body, remove the two screws K attaching the SCART board to the rear panel. (See Fig.8) (2) From the top side of the main body, disconnect the card wires from the connectors (CN513, CN514) on the SCART board. (See Fig.10) (3) Take out the SCART board. 3.1.10 Removing the connection 1 board (See Fig. 10) Remove the top cover and DSP board. (1) From the top side of the main body, disconnect the connec- tor CN571 on the connection 1 board from the input M board. (2) Take out the connection 1 board. Fig.10 SPK term. board CN301CN801 SCART boardCN513CN514 Connection 1