Infinity-1211A-pwr-sm 电路图 维修手册.pdf

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1、 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

2、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 Sp

3、ecifications 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

4、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 contin

5、ually 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 1 RadioFans.CN 收音机爱 好者资料库 Features ? 1-Channel O

6、peration ? 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 Te

7、st 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 t

8、he 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 cond

9、ucted 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 r

10、esistive 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

11、 when protection circuitry is engaged, and during power up. Power AmplifierPower Amplifier Reference 1210a/1211a 2 RadioFans.CN 收音机爱 好者资料库 If the amplifiers fuse must be replaced, use only the same type and rating as that of the original. Do not substitute another kind. The Reference amplifiers are

12、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 CONNECTION Connect the amplifiers Ground (GND) terminal to a

13、 solid point on the vehicles metal chassis, as close to the amplifier as possible. Refer to the chart below to determine minimum wire-gauge size. Sand away any paint from this location; use a star-type-lock washer to secure the connection. POWER CONNECTION Connect a wire (see chart at right for appr

14、opriate gauge) directly to the vehicles positive battery terminal, and install an appropriate fuse holder within 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 to use appr

15、opriate grommets whenever routing wires through the firewall or other sheet metal. Failure to adequately protect the positive wire from potential damage may result in a vehicle fire. When you are done routing and connecting this wire to the battery and to the amplifier, you may install the fuse at t

16、he battery. The fuse value should be selected based on total amplifier-current draw; see chart at right. REMOTE CONNECTION Connect the amplifiers Remote (REMOTE) terminal to the source units Remote Turn-On lead using a minimum of 18-gauge wire. If your source unit does not have a remote turn-on conn

17、ection, connect the amplifiers (REMOTE) terminal to the vehicles accessory circuit. WIRE-GAUGE CHART AmplifierMaximumMinimum ModelCurrent DrawWire Gauge AWG AWG 1210a/1211a115A #4 AWG These recommendations assume 7 10 wire runs. If your installation differs markedly, you will need to adjust the wire

18、 gauge accordingly. SPEAKER CONNECTIONS Refer to the application guides on the pages that follow. Speaker connections should be made using a minimum of 16-gauge wire. NOTE:When using the low-level or high-level inputs, the AUX outputs can be used to pass a full-range line-level signal to another amp

19、lifier. POWERCONNECTIONS Figure 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 sing

20、le-channel amplifiers. There are two sets of terminals to make it easy to connect multiple woofers. Either set of (+/) terminals may be used when connecting woofers. To the right are two application diagrams to help plan your subwoofer system installation. Figures 3 and 4 show how to configure the R

21、eference subwoofer amplifiers (models 311a, 611a and 1211a). NOTE: For simplicity, Figures 3 and 4 do not show power, remote and input connections. NOTE: Minimum speaker load is 2 ohms. APPLICATIONS 1201a/1211a Power AmplifierPower Amplifier Reference 1210a/1211a 4 SETTING INPUT SENSITIVITY 1. Initi

22、ally turn the INPUT LEVEL control(s) to minimum (counterclockwise). 2. Reconnect the () negative lead to the vehi- cles battery. Apply power to the audio system and play a dynamic music track. 3. On the source unit, increase the volume control to 3/4 volume. Slowly increase the INPUT LEVEL control(s

23、) toward three oclock until you hear slight distortion in the music. Then reduce the INPUT LEVEL slightly until distortion is no longer heard. NOTE: After the source unit is on, blue LEDs (on the top panel) will light, indicating the amplifier is on. If not, check the wiring, especially the remote c

24、onnection from the source unit. Also refer to “Troubleshooting” on page 7. REMOTE LEVEL CONTROL (OPTIONAL) All three Reference subwoofer amplifiers and the 5761a amplifier have inputs for an optional remote level control (100rc). This will allow the subwoofer level to be adjusted from the listening

25、position. Connect the optional remote level control using the RJ-11 jack on the side of the amplifier. Install the control module in the front of the vehicle within easy reach of the driver. Both the underside of the dash and the center console are suitable locations. Refer to the mounting instructi

26、ons accompanying the 100rc. AUX OUTPUT Reference amplifiers (except 5761a) are equipped with 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-range line-level signal to another amplifier. F

27、igure 13. Control end panel. Power AmplifierPower Amplifier Reference 1210a/1211a 5 STATUS LEDs Clip: 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:

28、Refer to “Troubleshooting” for specific indications. Figure 15. LED status. SETTING DBO(310a, 610a and 1210a) The Dynamic Bass Optimizer (DBO) is used to enhance low-frequency reproduction in a vehicle. Conventional bass-boost circuits only increase bass at a fixed frequency, and cause the amplifier

29、 to consume considerable power. The DBO allows you to adjust the frequency (20Hz 80Hz) as well as the boost level (up to 12dB; see Figure 14), allowing you to fine-tune the bass in your system to optimize performance. For sealed enclosures, the DBO can be used to enhance the lower bass region of sea

30、led enclosures. For bigger/fuller bass, adjust the HP FREQ between 35Hz and 45Hz; adjust the BOOST control according to your preference. For tighter-sounding bass, adjust the HP FREQ between 45Hz and 55Hz; adjust the BOOST control according to your preference. For vented enclosures, the DBO should b

31、e used as a subsonic filter to reduce overexcursion of the woofers. Set the HP FREQ control 10Hz below the tuning frequency of the enclosure (e.g., 25Hz for a box tuning of 35Hz); adjust the BOOST control to taste. This will conserve amplifier power typically wasted on frequencies below the tuned fr

32、equency of the enclosure. For infinite-baffle applications, set the HP FREQ to the speakers Fs value (reducing overexcursion of the woofer); adjust the Boost control to taste. Figure 14. Frequency-response curves show typical DBO control ranges. INSTALLATION ANDSETUP(CONT.) -9 -6 -3 0 -12 2080Freq.

33、(Hz) dB DBO HP FREQ Control (adjusts cut-off frequency) HP FREQ 100Hz20Hz -6 0 6 12 -12 2080Freq. (Hz) dB DBO BOOST Control (adjusts boost amount at cut-off frequency) BOOST MAX MIN Power AmplifierPower Amplifier Reference 1210a/1211a 6 PROBLEM: No audio (POWER LED is off). CAUSE and SOLUTION: No vo

34、ltage at BATT+ and/or REM terminals, or bad or no ground connection. Check voltages at amplifier terminals with VOM. PROBLEM: No audio (PROTECT LED flashes every 4 seconds). CAUSE and SOLUTION: DC voltage on amplifier output. Amplifier may need service; see enclosed warranty card for service informa

35、tion. PROBLEM: No audio (PROTECT LED is on). CAUSE and SOLUTION: Amplifier is overheated. Make sure amplifier cooling 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 le

36、ss 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 on BATT+ connection. Check vehicle charging system. PROBLEM: Distorted audio. CAUSE and SOLUTION: Input sensitivity is not set properly

37、, or amplifier or source unit is defective. Check INPUT LEVEL setting, or check speaker wires for shorts or grounds. PROBLEM: Distorted audio (PROTECT LED flashes). CAUSE and SOLUTION: Short circuit in speaker or wire. Remove speaker leads one at a time to locate shorted speaker or wire, then repair

38、. PROBLEM: Music lacks “punch. ” CAUSE and SOLUTION: Speakers are not connected properly. Check speaker connections for proper polarity. TROUBLESHOOTING Power AmplifierPower Amplifier Reference 1210a/1211a 7 Power AmplifierPower Amplifier Reference 1210a/1211a 8 Reference 1210a/1211a 9 Power Amplifi

39、erPower Amplifier Reference 1210a/1211a 10 REFERENCE 1210A/1211a BLOCK DIAGRAM Power AmplifierPower Amplifier Reference 1210a/1211a 11 Power AmplifierPower Amplifier Reference 1210a/1211a 12 Power AmplifierPower Amplifier Reference 1210a/1211a 13 Power AmplifierPower Amplifier Reference 1210a/1211a

40、14 Power AmplifierPower Amplifier Reference 1210a/1211a 15 DIO-00-00108 DIODEFAST RECOVERYFR154D71,72,73,81,82,836 DIO-00-00003 DIODERECTIFIER1N4004D1,2602 DIO-00-00019 DIODEZENER 1W,12V1N4742D4011 DIO-00-00006 DIODESWITCHING SIGNAL1SS133 / 1N4148D169,402,403,404,405,406,407,408,411,41210 TRS-00-000

41、87TRANSISTORSMALL SIGNAL PNP TO-92LKTA1023YQ402,4032 TRS-00-00088TRANSISTORSMALL SIGNAL NPN TO-92LKTC1027YQ270,271,4013 TRS-00-00090TRANSISTORSMALL SIGNAL PNP TO-92KTA1266GRQ2621 TRS-00-00110TRANSISTORSMALL SIGNAL NPN TO-92KTC3198GRQ101,260,261,2634 RES-00-00479RESISTORMETAL FILM 1/5WF270 OHMR4051 R

42、ES-00-00437RESISTORMETAL FILM 1/5WF1KF OHMR151,1562 RES-00-00482RESISTORMETAL FILM 1/5WF2KF OHMR1171 RES-00-00523RESISTORMETAL FILM 1/5WF4.7KF OHMR1131 RES-00-00575RESISTORMETAL FILM 1/5WF7.5KF OHMR1181 RES-00-00589RESISTORMETAL FILM 1/5WF9.4KF OHMR111,1122 RES-00-00402RESISTORMETAL FILM 1/5WF10KF O

43、HMR150,152,155,1574 RES-00-00419RESISTORMETAL FILM 1/5WF13KF OHMR4041 RES-00-00537RESISTORMETAL FILM 1/5WF47KF OHMR103,104,105,106,107,108,109,110,402,40310 RES-00-00606RESISTORCARBON FILM 1/5WJ100 OHMR51,52,53,54,55,56,61,62,63,6413 RES-00-00622RESISTORCARBON FILM 1/5WJ150 OHMR1251 RES-00-00712RESI

44、STORCARBON FILM 1/5WJ470 OHMR241,264,3413 RES-00-00723RESISTORCARBON FILM 1/5WJ510 OHMR120,1222 RES-00-00756RESISTORCARBON FILM 1/5WJ820 OHMR1161 RES-00-00633RESISTORCARBON FILM 1/5WJ1K OHMR50,57,60,67,153,1586 RES-00-00598RESISTORCARBON FILM 1/5WJ1.5K OHMR1331 RES-00-00602RESISTORCARBON FILM 1/5WJ1

45、.8K OHMR1351 RES-00-00702RESISTORCARBON FILM 1/5WJ4.7K OHMR114,262,4143 RES-00-00720RESISTORCARBON FILM 1/5WJ5.6K OHMR131,1322 RES-00-00608RESISTORCARBON FILM 1/5WJ10K OHMR44,119,123,128,129,130,261,263,406,40716 R409,410,412,416,418,419 RES-00-00623RESISTORCARBON FILM 1/5WJ15K OHMR121,1262 RES-00-0

46、0630RESISTORCARBON FILM 1/5WJ18K OHMR4151 RES-00-00658RESISTORCARBON FILM 1/5WJ22K OHMR101,1022 RES-00-00666RESISTORCARBON FILM 1/5WJ27K OHMR4171 RES-00-00680RESISTORCARBON FILM 1/5WJ30K OHMR1241 RES-00-00730RESISTORCARBON FILM 1/5WJ56K OHMR270,2712 RES-00-00757RESISTORCARBON FILM 1/5WJ82K OHMR1691

47、RES-00-00604RESISTORCARBON FILM 1/5WJ100K OHMR134,138,154,159,230,231,232,233,234,23622 R237,238,239,330,331,332,333,334,336,337 R338,339 RES-00-00620RESISTORCARBON FILM 1/5WJ150K OHMR1271 RES-00-00654RESISTORCARBON FILM 1/5WJ220K OHMR4131 RES-00-00727RESISTORCARBON FILM 1/5WJ560K OHMR4081 RES-00-00

48、755RESISTORCARBON FILM 1/5WJ820K OHMR2601 RES-00-00635RESISTORCARBON FILM 1/5WJ1M OHMR4111 RES-00-00018RESISTORMETAL FILM 1/2WJ10 OHMR220,221,222,223,224,226,227,228,229,32018 R321,322,323,324,325,327,328,329 RES-00-00794RESISTORMETAL FILM 1WJ10 OHMR73,832 IND-00-00025 INDUCTORLAL02TB1R0K AXIAL TYPE 5%1uHL1,22 CEC-00-00077CAPACITORCERAMIC DISK 50V NPO10pFC105,1062 CEC-00-00090CAPACITORCERAMIC DISK 50V NPO22pFC131,132,133,134,153,1546 CEC-00-00101CAPACITORCERAMIC DISK 50V470pFC1091 CEC-00-00074CAPACITORCER