Infinity-1211A-pwr-sm 维修电路原理图.pdf

Reference Series 1210a 1211a 1 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev2aa10/2005 RadioFans.CN 收音机爱 好者资料库- CONTENTS - SPECIFICATIONS .1 FEATURES/TEST CONDITIONS.2 CONTROLS/CONNECTIONS.3 INSTALLATION.5 BASIC TROUBLESHOOTING.7 TYPICAL SYSTEM WIRING.8 EXPLODED VIEW/PARTS LIST.9 MECHANICAL PARTS LIST.10 AMPLIFIER BLOCK DIAGRAM11 P.C.B. DRAWINGS.12 ELECTRICAL PARTS LIST . 16 REF 1211a ELECTRICAL PARTS LIST ADDENDUM.20 IC/TRANSISTOR PINOUTS.21 REF 1210a SCHEMATICS.27 REF 1211a SCHEMATICS.30 PACKING.33 Reference 1210a/1211a Specifications Output Power: 854W RMS x 1 4 ohms; 1% THD + N (14.4 VDC) 1300W RMS x 1 2 ohms; 1% THD + N Signal-to-noise ratio: 72dBA (reference 1W into 4 ohms) Dynamic power: 1516W channels 2 ohms Effective damping factor: 6.357 4 ohms Frequency response: 17Hz 302Hz (-3dB) Maximum input signal: 5.7V Maximum sensitivity: Reference 1210a - 260mV Reference 1211a - 75mV DC Offset 50mV (-50%) Output regulation: .132dB 4 ohms Idle Current 2.8A Input Impedance 22k Max Current Draw 70A 4 ohms 125A 2 ohms Dimensions: 12 x 18 1/2 x 2 11/16” (L x W x D) (305mm x 470mm x 68mm) Fuse: 3 x 40A Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related JBL publications are therefore subject to change without notice. Power AmplifierPower Amplifier Reference 1210a/1211a RadioFans.CN 收音机爱 好者资料库Features ? 1-Channel Operation ? Advanced MOSFET Oversized Floating Rail Power Supply ? Floating Ground Factory -Head -Unit Speaker -Level input ? Variable lnput Sensitivity (250mV -6V) ? Fully Complementary Output Stage with Class-D Voltage Amplification ? Gold-plated Power, lnput and Output Connectors ? 2-Ohm Stable Test Conditions and Notes ? All tests to be done, unless otherwise specified, from 10Hz to 302Hz at 14.4V DC into 2 ohm loads and adjust the units gain so that with a .250 volt input signal the unit is at Its maximum rated output. All measurements will be done using an Audio precision system one and the supply voltage. ? An A+ line voltage of 14.4V DC shall be applied to the unit under test for all measurements unless otherwise specified. The voltage applied to the unit shall be measured at the power connection on the Amplifier. ? Signal Source Unless otherwise specified, all tests shall be conducted with the Audio Signal Generator output configured to be balanced, less than or equal to 50 ohm source impedance, and floating. The signal source GND shall be connected to the Amplifier PWR GND at the Amplifier. ? Output Load Unless otherwise specified, all tests shall be conducted with 2 ohm resistive loads having less than 10% reactive components at any frequency below 302Hz. Each resistor shall have a value that remains within 1 %while dissipating the rated output of the unit under test. ?Power Indicator Green LED steadily illuminates for normal operation. Illuminates up Red LED blinks when protection circuitry is engaged, and during power up.Power AmplifierPower Amplifier Reference 1210a/1211a 2 If the amplifiers fuse must be replaced, useonly the same type and rating as that of theoriginal. Do not substitute another kind.The Reference amplifiers are capable of delivering high power levels, and require a reliable connection to the vehicles electrical system in order to perform optimally. See Figure 1 for connection location. Please adhere to the following instructions carefully. GROUND CONNECTIONConnect the amplifiers Ground (GND) terminalto a solid point on the vehicles metal chassis, as close to the amplifier as possible. Refer to thechart below to determine minimum wire-gaugesize. Sand away any paint from this location; usea star-type-lock washer to secure the connection.POWER CONNECTIONConnect a wire (see chart at right for appropriategauge) directly to the vehicles positive batteryterminal, and install an appropriate fuse holderwithin 18 of the battery terminal. Do not install the fuse at this time. Route the wire to the amplifiers location, and connect it to the amplifiers positive (+12V) terminal. Be sure touse appropriate grommets whenever routingwires through the firewall or other sheet metal.Failure to adequately protect the positive wirefrom potential damage may result in a vehiclefire. When you are done routing and connectingthis wire to the battery and to the amplifier, you may install the fuse at the battery. The fuse value should be selected based on totalamplifier-current draw; see chart at right.REMOTE CONNECTIONConnect the amplifiers Remote (REMOTE) terminal to the source units Remote Turn-Onlead using a minimum of 18-gauge wire. If yoursource unit does not have a remote turn-on connection, connect the amplifiers (REMOTE)terminal to the vehicles accessory circuit.WIRE-GAUGE CHARTAmplifierMaximumMinimum ModelCurrent DrawWire GaugeAWGAWG1210a/1211a115A #4 AWGThese recommendations assume 7 10 wireruns. If your installation differs markedly, youwill need to adjust the wire gauge accordingly.SPEAKER CONNECTIONSRefer to the application guides on the pages that follow. Speaker connections should bemade using a minimum of 16-gauge wire.NOTE:When using the low-level or high-levelinputs, the AUX outputs can be used to pass afull-range line-level signal to another amplifier.POWERCONNECTIONSFigure 1.Terminal-connection end plate.Power AmplifierPower Amplifier Reference 1210a/1211a 3 Figure 4. Reference subwoofer amplifier with one woofer connection.Figure 3. Reference subwoofer amplifier with two woofer connections.The Reference subwoofer amplifiers are single-channel amplifiers. There are two sets ofterminals to make it easy to connect multiplewoofers. Either set of (+/) terminals may beused when connecting woofers.To the right are two application diagrams to helpplan your subwoofer system installation. Figures3 and 4 show how to configure the Reference subwoofer amplifiers (models 311a, 611a and1211a). NOTE: For simplicity, Figures 3 and 4 do not show power, remote and input connections.NOTE: Minimum speaker load is 2 ohms.APPLICATIONS 1201a/1211aPower AmplifierPower Amplifier Reference 1210a/1211a 4 SETTING INPUT SENSITIVITY1. Initially turn the INPUT LEVEL control(s) tominimum (counterclockwise).2. Reconnect the () negative lead to the vehi-cles battery. Apply power to the audio systemand play a dynamic music track.3. On the source unit, increase the volume control to 3/4 volume. Slowly increase theINPUT LEVEL control(s) toward three oclockuntil you hear slight distortion in the music.Then reduce the INPUT LEVEL slightly untildistortion is no longer heard. NOTE: After the source unit is on, blue LEDs (onthe top panel) will light, indicating the amplifieris on. If not, check the wiring, especially theremote connection from the source unit. Alsorefer to “Troubleshooting” on page 7.REMOTE LEVEL CONTROL (OPTIONAL)All three Reference subwoofer amplifiers and the 5761a amplifier have inputs for an optionalremote level control (100rc). This will allow thesubwoofer level to be adjusted from the listeningposition. Connect the optional remote level control using the RJ-11 jack on the side of theamplifier. Install the control module in the frontof the vehicle within easy reach of the driver.Both the underside of the dash and the centerconsole are suitable locations. Refer to themounting instructions accompanying the 100rc.AUX OUTPUTReference amplifiers (except 5761a) are equippedwith full-range outputs that can be used to connect additional amplifiers. NOTE:When using the low- or high-level inputs,the AUX outputs can be used to pass a full-rangeline-level signal to another amplifier.Figure 13. Control end panel.Power AmplifierPower Amplifier Reference 1210a/1211a 5STATUS LEDsClip: Indicates the amplifier is being overdriven,and your speakers may be in danger. This should blink only on musical peaks, and not be on constantly.Power: Indicates the amplifier is on.Protection: Refer to “Troubleshooting” for specificindications.Figure 15. LED status.SETTING DBO(310a, 610a and 1210a)The Dynamic Bass Optimizer (DBO) is used toenhance low-frequency reproduction in a vehicle.Conventional bass-boost circuits only increasebass at a fixed frequency, and cause the amplifierto consume considerable power. The DBO allows you to adjust the frequency (20Hz 80Hz) as wellas the boost level (up to 12dB; see Figure 14),allowing you to fine-tune the bass in your systemto optimize performance.For sealed enclosures, the DBO can be used to enhance the lower bass region of sealedenclosures.For bigger/fuller bass, adjust the HP FREQbetween 35Hz and 45Hz; adjust the BOOST control according to your preference. For tighter-sounding bass, adjust the HP FREQbetween 45Hz and 55Hz; adjust the BOOST control according to your preference.For vented enclosures, the DBO should be used as a subsonic filter to reduce overexcursion of the woofers. Set the HP FREQ control 10Hzbelow the tuning frequency of the enclosure (e.g., 25Hz for a box tuning of 35Hz); adjust theBOOST control to taste. This will conserve amplifier power typically wasted on frequenciesbelow the tuned frequency of the enclosure.For infinite-baffle applications, set the HP FREQ tothe speakers Fs value (reducing overexcursion ofthe woofer); adjust the Boost control to taste.Figure 14. Frequency-response curves show typical DBO control ranges.INSTALLATION ANDSETUP(CONT.)-9-6-30-122080Freq. (Hz)dBDBO HP FREQ Control(adjusts cut-offfrequency)HP FREQ100Hz20Hz-60612-122080Freq. (Hz)dBDBO BOOST Control(adjusts boost amountat cut-off frequency)BOOST MAX MINPower AmplifierPower Amplifier Reference 1210a/1211a 6PROBLEM:No audio (POWER LED is off).CAUSE and SOLUTION:No voltage at BATT+ and/or REM terminals, orbad or no ground connection. Check voltagesat amplifier terminals with VOM.PROBLEM:No audio (PROTECT LED flashes every 4 seconds).CAUSE and SOLUTION:DC voltage on amplifier output. Amplifier mayneed service; see enclosed warranty card forservice information.PROBLEM:No audio (PROTECT LED is on).CAUSE and SOLUTION:Amplifier is overheated. Make sure amplifiercooling is not blocked at mounting location;verify that speaker-system impedance is within specified limits.PROBLEM:No audio (PROTECT and POWER LEDs flash).CAUSE and SOLUTION:Voltage less than 9V on BATT+ connection.Check vehicle charging system.PROBLEM:No audio (PROTECT LED is on).CAUSE and SOLUTION:Voltage greater than 16V or less than 8.5V onBATT+ connection. Check vehicle charging system.PROBLEM:Distorted audio.CAUSE and SOLUTION:Input sensitivity is not set properly, or amplifieror source unit is defective. Check INPUT LEVELsetting, or check speaker wires for shorts orgrounds.PROBLEM:Distorted audio (PROTECT LED flashes).CAUSE and SOLUTION:Short circuit in speaker or wire. Remove speaker leads one at a time to locate shortedspeaker or wire, then repair.PROBLEM:Music lacks “punch. ”CAUSE and SOLUTION:Speakers are not connected properly. Checkspeaker connections for proper polarity.TROUBLESHOOTINGPower AmplifierPower Amplifier Reference 1210a/1211a 7Power AmplifierPower Amplifier Reference 1210a/1211a 8 Reference 1210a/1211a 9Power AmplifierPower Amplifier Reference 1210a/1211a 10REFERENCE 1210A/1211a BLOCK DIAGRAMPower AmplifierPower Amplifier Reference 1210a/1211a 11Power AmplifierPower Amplifier Reference 1210a/1211a 12Power AmplifierPower Amplifier Reference 1210a/1211a 13Power AmplifierPower Amplifier Reference 1210a/1211a 14Power AmplifierPower Amplifier Reference 1210a/1211a 15DIO-00-00108 DIODEFAST RECOVERYFR154D71,72,73,81,82,836DIO-00-00003 DIODERECTIFIER1N4004D1,2602DIO-00-00019 DIODEZENER 1W,12V1N4742D4011DIO-00-00006 DIODESWITCHING SIGNAL1SS133 / 1N4148D169,402,403,404,405,406,407,408,411,41210TRS-00-00087TRANSISTORSMALL SIGNAL PNP TO-92LKTA1023YQ402,4032TRS-00-00088TRANSISTORSMALL SIGNAL NPN TO-92LKTC1027YQ270,271,4013TRS-00-00090TRANSISTORSMALL SIGNAL PNP TO-92KTA1266GRQ2621TRS-00-00110TRANSISTORSMALL SIGNAL NPN TO-92KTC3198GRQ101,260,261,2634RES-00-00479RESISTORMETAL FILM 1/5WF270 OHMR4051RES-00-00437RESISTORMETAL FILM 1/5WF1KF OHMR151,1562RES-00-00482RESISTORMETAL FILM 1/5WF2KF OHMR1171RES-00-00523RESISTORMETAL FILM 1/5WF4.7KF OHMR1131RES-00-00575RESISTORMETAL FILM 1/5WF7.5KF OHMR1181RES-00-00589RESISTORMETAL FILM 1/5WF9.4KF OHMR111,1122RES-00-00402RESISTORMETAL FILM 1/5WF10KF OHMR150,152,155,1574RES-00-00419RESISTORMETAL FILM 1/5WF13KF OHMR4041RES-00-00537RESISTORMETAL FILM 1/5WF47KF OHMR103,104,105,106,107,108,109,110,402,40310RES-00-00606RESISTORCARBON FILM 1/5WJ100 OHMR51,52,53,54,55,56,61,62,63,6413RES-00-00622RESISTORCARBON FILM 1/5WJ150 OHMR1251RES-00-00712RESISTORCARBON FILM 1/5WJ470 OHMR241,264,3413RES-00-00723RESISTORCARBON FILM 1/5WJ510 OHMR120,1222RES-00-00756RESISTORCARBON FILM 1/5WJ820 OHMR1161RES-00-00633RESISTORCARBON FILM 1/5WJ1K OHMR50,57,60,67,153,1586RES-00-00598RESISTORCARBON FILM 1/5WJ1.5K OHMR1331RES-00-00602RESISTORCARBON FILM 1/5WJ1.8K OHMR1351RES-00-00702RESISTORCARBON FILM 1/5WJ4.7K OHMR114,262,4143RES-00-00720RESISTORCARBON FILM 1/5WJ5.6K OHMR131,1322RES-00-00608RESISTORCARBON FILM 1/5WJ10K OHMR44,119,123,128,129,130,261,263,406,40716R409,410,412,416,418,419RES-00-00623RESISTORCARBON FILM 1/5WJ15K OHMR121,1262RES-00-00630RESISTORCARBON FILM 1/5WJ18K OHMR4151RES-00-00658RESISTORCARBON FILM 1/5WJ22K OHMR101,1022RES-00-00666RESISTORCARBON FILM 1/5WJ27K OHMR4171RES-00-00680RESISTORCARBON FILM 1/5WJ30K OHMR1241RES-00-00730RESISTORCARBON FILM 1/5WJ56K OHMR270,2712RES-00-00757RESISTORCARBON FILM 1/5WJ82K OHMR1691RES-00-00604RESISTORCARBON FILM 1/5WJ100K OHMR134,138,154,159,230,231,232,233,234,23622R237,238,239,330,331,332,333,334,336,337R338,339RES-00-00620RESISTORCARBON FILM 1/5WJ150K OHMR1271RES-00-00654RESISTORCARBON FILM 1/5WJ220K OHMR4131RES-00-00727RESISTORCARBON FILM 1/5WJ560K OHMR4081RES-00-00755RESISTORCARBON FILM 1/5WJ820K OHMR2601RES-00-00635RESISTORCARBON FILM 1/5WJ1M OHMR4111RES-00-00018RESISTORMETAL FILM 1/2WJ10 OHMR220,221,222,223,224,226,227,228,229,32018R321,322,323,324,325,327,328,329RES-00-00794RESISTORMETAL FILM 1WJ10 OHMR73,832IND-00-00025 INDUCTORLAL02TB1R0K AXIAL TYPE 5%1uHL1,22CEC-00-00077CAPACITORCERAMIC DISK 50V NPO10pFC105,1062CEC-00-00090CAPACITORCERAMIC DISK 50V NPO22pFC131,132,133,134,153,1546CEC-00-00101CAPACITORCERAMIC DISK 50V470pFC1091CEC-00-00074CAPACITORCERAMIC DISK 50V102pFC7,107,108,111,406,701,9007CEC-00-00076CAPACITORCERAMIC DISK 50V104pFC41,42,73,83,170,171,172,173,174,17524C176,177,178,179,180,181,182,183,211,261C262,401,403,411CEC-00-00124CAPACITORCERAMIC DISK 50V MLCC104pFC55,409,4103ELC-00-00153CAPACITORELECTROLYTICSMS1uF/50VC113,4082ELC-00-00160CAPACITORELECTROLYTICSMS4.7uF/50VC71,81,114,4074ELC-00-00125CAPACITORELECTROLYTICSMS10uF/16VC110,1122ELC-00-00127CAPACITORELECTROLYTICSMS22uF/16VC101,102,103,104,115,121,151,1528ELC-00-00130CAPACITORELECTROLYTICSMS47uF/16VC2601ELC-00-00523CAPACITORELECTROLYTICSMS100uF/16VC75,85,4043ELC-00-00150CAPACITORELECTROLYTICSMS100uF/35VC72,822ELC-00-00132CAPACITORELECT