JVC-RX8012PSL-avr-sm维修电路原理图.pdf

SERVICE MANUAL AUDIO/VIDEO CONTROL RECEIVER No.21066 Feb. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. RX-8012PSL RX-8012PSL Contents Safety precautions -1-2 Disassembly method -1-3 Adjustment method -1-9 Self-diagnose function -1-10 Description of major ICs -1-1226 Area suffix US - Singapore D I G I T A L CONTROL + + + 231 564 897/P 0+1010 LINE DIF .ECTBOOSTEFFECT MENU ENTER SIZE ROOMBASS MODETESTCTR TONELIVENESS MIDNIGHT SOUNDSUBWFR DIGITAL EQREAR L REAR R L/R BALCENTER MUTING CH/LEVEL TV VOL PLAY STOP /REW DOWN TUNING UP FF/ EXIT BAL L BAL R VOLUME CATV/DBS CONTROL TV/VIDEO MENU TEXT REC DISPLAY PAUSE PAUSE SET RETURNFM MODE100+ CONTROL A/V CONTROL RECEIVER CATV/DBSVCR 1TVAUDIO DSP MODEINPUTON/OFF DVD MUILTIDVD USB CD CDR TAPE/MD TV/DBSVIDEOPHONO FM/AM VCR 1VCR 2 SURROUNDANALOG/DIGITALSLEEP CONTROL DOWNUP EFFECTSETTING DIGITAL EQ TV SOUND/DBSVIDEOVCR 2VCR 1DVDDVD MULTI MIDNIGHT MODEDSP MODE S-VIDEOVIDEO VIDEO LAUDIOR SURROUND ON/OFF SUBWOOFER OUT ON/OFF SPEAKERS ON/OFF FM/AM TUNINGFM/AM PRESETFM MODE MEMORY PHONES 1 STANDBY USB AUDIO PUSH OPEN INPUT ANALOG/DIGITAL INPUT ATT FM / AMUSB AUDIOTAPE / MDCDRCDPHONO LEVEL ADJUST AUDIO/VIDEO CONTROL RECEIVER LINE DIRECT BASS BOOST MASTER VOLUME D I G I T A L SURROUNDD I G I T A L 2 SOUCE NAME SOUCE NAME STANDBY/ON RadioFans.CN 收音机爱 好者资料库 RX-8012PSL 1-2 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 unless 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 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 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 Parts 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 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 re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform 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 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, 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 (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 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 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. 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. 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 ! 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. 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. (This regulation does not correspond to J and C version.) RadioFans.CN 收音机爱 好者资料库 RX-8012PSL 1-3 Remove the four screws A attaching the top cover on both sides of the body. Remove the three screws B on the back of the body. Remove the top cover from behind in the direction of the arrow while pulling both sides outward. 1. 2. 3. Disassembly method Removing the top cover (See Fig.1) Prior to performing the following procedure, remove the top cover. Remove the power cord stopper from the rear panel by moving it in the direction of the arrow. Remove the thirty six screws E attaching the each board to the rear panel. Remove the three screws F attaching the rear panel on the back of the body. 1. 2. 3. Removing the rear panel (See Fig.4) Prior to performing the following procedure, remove the top cover. Cut off the tie bands. Disconnect the harness from the connector CN416 (on the video audio board), CN206 (on the video board) and CN244 (on the S video board) (see fig.8). Disconnect the card wire from the connector CN400 on the audio board and CN402 on the power supply board. Remove the three screws C which fix the upper surface of the front panel, and four screws D which fix the bottom. Detach the front panel assembly toward the front. Remove the screw P attaching the bracket for headphone jack and remove the earth wire (see fig. 19). 1. 2. 3. 4. 5. 6. Removing the front panel assembly (See Fig.2 and 3) Fig.1 Fig.2 Fig.3 Fig.4 A 2 B Top cover C C Power supply board Audio board CN400 Main board E F E F F Cord stopper Front panel assembly Front panel assemblyD Rear panel T Tie band EEE E RX-8012PSL 1-4 Prior to performing the following procedure, remove the top cover and rear panel. Cut off the tie bands. Disconnect the harness from the connector CN721, CN723 on the main board and CN722 on the center amp. board. Remove the fastener which is fixing the small board to the audio input board. Draw out the DVD board upwards, disconnecting the connector CN501, CN243, CN205, CN381 and CN361 on the DVD board. 1. 2. 3. 4. Removing the DVD board (See Fig.5 and 6) Prior to performing the following procedure, remove the top cover, rear panel and DVD board. Remove the tuner board from the connector CN101 on the audio board. Remove the audio input board from the connector CN301 on the audio board. Disconnect the harness from the connector CN416 and remove the video audio board from the connector CN303 on the audio board. Disconnect the harness from the connector CN206 and remove the video board from the connector CN201 on the audio board. Disconnect the harness from the connector CN244 and remove the S video board from the connector CN241 on the audio board. Remove the DSP board from the connector CN601 on the audio board. 1. 2. 3. 4. 6. 7. Removing the each board of the tuner, the audio input, the video audio, the video, the S video and the DSP (See Fig.7 to 10) Fig.5 Fig.6 Fig.8 Tie band CN101 CN723 Tuner board CN721 CN722 (on the center amp. board) DVD board Main board CN361 CN381 CN243 CN501 CN205 CN303 CN201 CN241 Audio board Fig.7 Audio input board Audio input board Fastener Small board Video board S Video board Video audio board DSP board CN301 CN101 Video board S Video board CN244 Video audio board CN206 CN416 DVD board RX-8012PSL 1-5 Removing the audio board (See Fig.11 and 12) Prior to performing the following procedure, remove the top cover, rear panel, DVD board, tuner board, audio input board, video audio board, video board, S video board and DSP board. Disconnect the harness from the connector CN813 and CN814 on the main board. Disconnect the harness from the connector CN931 /CN932 on the audio board. Cut off the tie band. Disconnect the connector CN71(on the power supply board) and CN81(on the audio board) and remove the relay board. Disconnect the harness from the connector CN831 on the main board. Remove the three screws G and one screw H attaching the audio board. 1. 2. 3. 4. 5. 6. Removing the speaker board (See Fig.11) Prior to performing the following procedure, remove the top cover and rear panel. Disconnect the harness from connector CN931/CN932 on the audio board. Disconnect the harmess from connector CN813 and CN814 on the main board. 1. 2. Fig.10 Fig.11 Power supply board Relay board Audio board Speaker board CN71 CN81 H CN814 CN813 CN931 /CN932 Power transformer G Tie band CN831 Main board Fig.12 DSP board CN601 Video board S Video board Video audio board Fig.9 Audio board RX-8012PSL 1-6 Prior to performing the following procedure, remove the top cover and main board. Remove the two screws K attaching the heat sink to the reverse side of main board. Disconnect the five connectors with each amp. board, and remove the main board. Remove the four screws K and ten screws L attaching the heat sink. 1. 2. 3. Removing the heat sink (See Fig.14a, 14b and 15) Prior to performing the following procedure, remove the top cover. Remove the card wire and cut off the tie bands. Disconnect the harness from the connector CN721, CN723, CN813, CN814, CN831 and CN881 on the main board. Disconnect the harness from the connector CN722 on the center amp. board (see fig.5). Disconnect the harness from the connector CN811 on the power trans1 board. Remove the screw H, after removing the relay board if needed (see fig.11). Remove the two screws I and the six screws J attaching the main board. 1. 2. 3. 4. 6. 7. Removing the main board (See Fig.13) Prior to performing the following procedures, remove the top cover and the rear panel. Cut off the tie band. Unsolder six solder parts on the voltage select board. 1. 2. Removing the voltage select board (See Fig.16) Fig.13 Main board (reverse side) Main board Amp. board Rear Rch amp. board Front Lch amp. board Front Rch amp. board Center amp. board Rear Lch amp. board Heat sink Heat sink K K L K Fig.14b Fig.14a Fig.15 Main board CN881 CN831 CN814 CN721 CN706 CN705 CN702 CN701 CN703 CN722 CN723 CN813 I I H JJ Tie band Tie band Card wireCN811 Power transformer Solder part Solder part Tie band Voltage select board Voltage selector Fig.16 K Power trans1 board RX-8012PSL 1-7 Prior to performing the following procedure, remove the top cover and relay board. Cut off the tie band if needed. Disconnect the card wire from the connector CN402 on the power supply board. Disconnect the harness from the connector CN55/CN56 on the power trans1 board (see fig.17). Remove the three screws O attaching the power supply board and pull out the power supply board removing the hook. Unsolder three solder parts on the power supply board. 1. 2. 3. 4. 5. Removing the power supply board (See Fig.18) Prior to performing the following procedure, remove the top cover and rear panel. Unsolder seven solder parts on the power/fuse board. Remove the screw N attaching the power/fuse board. 1. 2. Removing the power/fuse board (See Fig.17) Prior to performing the following procedure, remove the top cover, front panel assembly and power supply board. Disconnect the harness form the connector CN881on the main board (see fig.13). Remove the nut fixing the headphone jack. Remove the screw P attaching the bracket and remove the bracket. Drawn out the headphone jack board in the direction of an inner side. 1. 2. 3. 4. Removing the headphone jack board (See Fig.18 and 19) Prior to performing the following procedures, remove the top cover. Disconnect the harness from the connector CN55 /CN56 and CN811 on the power trans1 board. Unsolder seven solder parts on the power trans2 board . Remove the four screws M attaching the power transformer. 1. 2. 3. Removing the power transformer (See Fig.17) Fig.18 Fig.19 Nut Bracket Headphone jack Headphone jack Headphone jack board Tie band P (fixing the earth wire form the front panel assembly) Solder part Hook Tie band O O O Power supply board CN402 Fig.17 Power supply board CN55/CN56 CN811 Power transformer M Solder part M Solder part N Power/fuse board Power cord Power trans1 board Power trans2 board RX-8012PSL 1-8 Prior to performing the following procedure, remove the top cover and front panel assembly. Pull out the volume knob on the front side of the front panel and remove the nut attaching the system control board. Remove the two screws A attaching the power switch board on the front panel assembly(inner side). Remove the two screws B attaching the switch board on the front panel assembly(inner side). Remove the cords from the three hooks a. Remove the eight screws C attaching the system control board from the inner side of the front panel assembly. Release the four joints on the back of the front panel by pushing the joint tabs inward. Remove the operation switch panel toward the front. Disconnect the harness from the connector CN420 and CN422 on the system control board. Release the two hooks b attaching the system 1. 2. 3. 4. 5. 6. 7. 8. Removing the system control board, power switch board and switch board (See Fig.1 to 3) Matters that require attention during replacement of IC400 In case wh