Infinity-475A-pwr-sm 电路图 维修手册.pdf

《Infinity-475A-pwr-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Infinity-475A-pwr-sm 电路图 维修手册.pdf（29页珍藏版）》请在收音机爱好者资料库上搜索。

1、 Reference Series 475a 4,3,2 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 3/2008 Released 2007 Discontinued XXXX RadioFans.CN 收音机爱 好者资料库 - CONTENTS - BASIC SPECIFICATIONS .1 DETAILED SPECIFICATIONS .2 PACKING.3 APPLICATIONS4 INSTA

2、LLATION/SETUP.6 BASIC TROUBLESHOOTING.6 EXPLODED VIEW/PARTS LIST.7 NOTE ON TOP COVER.8 AMPLIFIER BLOCK DIAGRAM.9 P.C.B. DRAWINGS.10 ELECTRICAL PARTS LIST . 16 IC/TRANSISTOR PINOUTS.21 SCHEMATICS.22 Reference 475a Basic Specifications Output Power: 75W RMS x 4 4 ohms; 1% THD + N (14.4 VDC) 90W RMS x

3、4 2 ohms; 1% THD + N Signal-to-noise ratio: 85dBA (reference 1W into 4 ohms) Dynamic power: 117W channels 2 ohms Effective damping factor: 6.3 4 ohms Frequency response: 10Hz 100kHz (-3dB) Maximum input signal: 6.0V Maximum sensitivity: 100mV Output regulation: 0.21dB 4 ohms Dimensions (L x W x D):

4、14-3/16 x 9 x 2-11/16 (361mm x 229mm x 69mm) Fuse: 2 x 35A 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. 475a Reference Series 1 Rad

5、ioFans.CN 收音机爱 好者资料库 INFINITY REFERENCE 475a AMPLIFIER SPECIFICATIONS TEST VOLTAGE 14.4 +0.1V Specification Rating Unit Remarks Power Output 4ohm loads 1kHz (stereo mode) for each ch 1.0%THD (Unit:W)(LPF=22K) 75W x 4 Watts Power Output 2ohm loads 1kHz (stereo mode) for each ch 90 dBA 1 watt into 4 o

6、hms 1V signal input Input Sensitivity Low Level Input(v) :full rated power 100mV-6V Volts 20% Frequency response (Unit:-3dB) 10Hz100kHz Hz -3dB High-Pass Crossover Frequency limits +20% 40Hz 450Hz Hz Low-Pass Crossover Frequency limits +20% 40Hz 450Hz Hz Bass Boost:(Unit:dB) 50Hz (5Hz ) 06dB dB 1dB

7、Idle Current ( 4ohm) 0.5A A 0.15A MAX current : rated power (All channel 2 ohm loads) 65A A DC Offset: 30mV mV Damping Factor (4ohm): 200 Effective damping factor (4ohm): 6.395 Dynamic Power 2 ohms 130W Watts Output Regulation 4 ohms 0.03dB dB Remote Operating Voltages: ON 5V OFF 4V Volts 1V Turn on

8、 delay time 2 to 3 Sec Circuit Protection a. Temperature b. Speaker Short Circuit c. Operating Voltage Range 95 5 deg C Yes 816V +0.5V Dimensions (L x W x H): 14-3/16 x 9 x 2-11/16 (361mm x 229mm x69mm) Inches mm Fuses 35A x 2 A 475a Reference Series 2 RadioFans.CN 收音机爱 好者资料库 PACKAGING Item Part Num

9、ber Description Qty 1 CH4482901203 Outer Carton 1 2 REF475a REF475a Amplifier 1 3 Plastic Bag 1 4 BZL279112001 Packing Foam 1 5 Visit I Owners manual 1 6 Plastic Bag 1 7 Accessory kit consisting of: 1 LS1CJ0402507 Mounting Screws 4 1601-353G-00 SPARE 35A FUSES 2 475a Reference Series 3 To Head Unit

10、Front Output To Head Unit Rear Output Rear SpeakersFront Speakers Figure 5. 475a connected to full-range speakers. Note crossover and channel assignment settings. Figure 6. 475a connected to four satellite speakers and used in conjunction with an additional subwoofer amplifier or powered subwoofer.

11、Note crossover and channel assignment settings. To Head Unit Front Output To Sub Amp To Head Unit Rear Output Rear SpeakersFront Speakers The 475a can be set up for stereo 4-channel, 3-channel or bridged 2-channel operation, as shown in Figures 5 through 8. NOTE: Minimum speaker impedance for stereo

12、 operation is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms. Not all possible applications are shown here; e.g., the applications shown in Figures 5, 6 or 8 could include a separate subwoofer driven by an additional amplifier. In that case, the user should refer to Figure 6 for c

13、rossover and sub amp connection suggestions. APPLICATIONS 475a 475a Reference Series 4 APPLICATIONS 475a To Head Unit Front Output To Head Unit Sub Output SubwooferFront Speakers Figure 7. 475a connected in tri-mode to a subwoofer and a pair of satellite speakers. Note crossover and channel assignme

14、nt settings. Figure 8. 475a connected in bridge mode to a pair of full-range speakers. Note crossover and channel assignment settings. To Head Unit Left To Head Unit Right Right SpeakerLeft Speaker 475a Reference Series 5 SETTING INPUT SENSITIVITY 1. Initially turn the INPUT LEVEL control(s) to the

15、minimum (counterclockwise) position. 2. On the source unit, increase the volume control to 3/4 volume. Slowly increase the INPUT LEVEL control(s) 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 t

16、he 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 connection from the source unit. Also refer to “Troubleshooting.” REMOTE LEVEL CONTROL The 1300a, 1600a and 5350a include a remote level control. This will a

17、llow the subwoofer level to be adjusted from the listening position. Connect the remote level control using the RJ11 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 under- side of the dash and the center console are

18、suitable locations. UNDER-DASH MOUNTING Select a mounting location that allows easy access to the control while driving. Using the REMOTE LEVEL control as a template, mark and drill holes in the mounting surface. Attach the REMOTE LEVEL control using the mounting screws provided (Figure 11). Figure

19、11. Under-dash mounting of the REMOTE LEVEL control. Refer to the illustrations on the previous pages for control location. Reconnect the () negative lead to the vehicles battery. Apply power to the audio system and play a dynamic music track. SETTING THE CROSSOVER(S) Determine your system plans and

20、 set the crossover-mode switch accordingly. If your system design does not include a subwoofer, set the crossover mode to FULL and skip to “Setting Input Sensitivity.” If your system includes a subwoofer, set the crossover mode to HP (high-pass) for your full-range speakers. Adjust the crossover fre

21、quency to limit bass, and provide increased system volume with less distortion. Mode Switch: Full: Allows a full-range signal through to the speakers; can be used with larger full-range speakers such as 6 x 9s. HP: Allows a high-pass signal through to the speakers; should be used with most loudspeak

22、ers (can protect your full-range speakers from being overdriven with low frequencies, one cause of speaker damage). LP: Allows only bass to pass through to the speakers; should be selected when powering subwoofers. High-Pass Filters: Initially set the crossover- frequency control midway. While liste

23、ning to music, adjust the crossover for the least perceived distortion from the speakers, allowing them to reproduce as much bass as possible. Low-Pass Filters: For subwoofers, choose the highest frequency that removes vocal information from the sound of the subwoofer. If using the 475a to drive a s

24、ubwoofer(s), set the crossover mode to LP (low-pass) on the channels connected to the subwoofer. NOTE: The 1300a, 1600a and the subwoofer output of the 5350a are low-pass only and do not have a crossover-mode switch. INSTALLATION ANDSETUP Route the cable behind the dash or other interior panels and

25、under the carpet. Do not route the cable outside the vehicle. Connect the RJ11 cable between the RJ11 receptacle on the amp and the receptacle on the REMOTE LEVEL control (Figure 12). Figure 12. REMOTE LEVEL control electrical connection. SETTING THE BASS BOOST The Bass Boost control will allow you

26、to enhance the bass output of your system at 50Hz up to 6dB. AUX OUTPUT Reference amplifiers (except 5350a) are equipped with full-range outputs that can be used to connect additional amplifiers. STATUS LEDs Power: Indicates the amplifier is on. Protection: Refer to “Troubleshooting” for specific in

27、dications. Figure 13. LED status. TROUBLESHOOTING PROBLEM: No audio (POWER LED is off). CAUSE and SOLUTION: No voltage at BATT+ and/or REM terminals, or bad or no ground connection. Check voltages at amplifier terminals with VOM. PROBLEM: No audio (PROTECT LED glows red). CAUSE and SOLUTION: DC volt

28、age on amplifier output. Amplifier may need service; see enclosed warranty card for service information. PROBLEM: No audio (PROTECT LED glows red). CAUSE and SOLUTION: Amplifier is overheated. Make sure amplifier cooling is not blocked at mounting location; verify that speaker-system impedance is wi

29、thin specified limits. PROBLEM: No audio (PROTECT LED glows red). CAUSE and SOLUTION: Voltage less than 9V on BATT+ connection. Check vehicle charging system. PROBLEM: No audio (PROTECT LED glows red). CAUSE and SOLUTION: Voltage greater than 16V or less than 8.5V on BATT+ connection. Check vehicle

30、charging system. PROBLEM: Distorted audio. CAUSE and SOLUTION: Input sensitivity is not set properly, or amplifier or source unit is defective. Check INPUT LEVEL setting, or check speaker wires for shorts or grounds. PROBLEM: Distorted audio (PROTECT LED glows intermittently). CAUSE and SOLUTION: Sh

31、ort circuit in speaker or wire. Remove speaker leads one at a time to locate shorted speaker or wire, then repair. PROBLEM: Music lacks “punch.” CAUSE and SOLUTION: Speakers are not connected properly. Check speaker connections for proper polarity. 475a Reference Series 6 Item# Part Number Descripti

32、on Qty 1 SG-0016-2601 Top cover (original, see Page 8) 1 SG-0001-2607 Top cover (Rev1, see Page 8) 1 2 GD-600011400 Light panel 1 3 SR-F475-0117 Main heat sink 1 4 LSIFM0300011 Screw 5 5 Main PCB 1 6 MK-0005-2601 Front panel 1 7 LS5KP0300807 Screw for F/RP 8 8 LS5KJ0301007 Screw for terminal, RCA ja

33、cks 6 9 XN-10500-012 Knob 6 10 LSIAP0300607 Screw 6 11 LSIAM0300607 Screw 2 12 XG-0017-2601 Bottom plate 1 13 LSIAY0301201 Screw 2 14 PL-L0007-000 Transistor spring clip (2) 4 15 PL-L0006-000 Transistor spring clip (1) 6 16 ZL-10037A-15 Space Pole 2 17 HG-0006-2601 Rear panel 1 18 LSIAA0200501 Screw

34、 1 19 LS1AM0250401 Screw 4 20 LED PCB 1 21 CP-B00011400 LED lens 1 475a Reference Series 7 NOTE ON TOP COVER FOR INFINITY REFERENCE MODELS REF475A, REF1300A, REF1600A There was a revision in the top cover design starting with the serial number range(s) noted below, or identified by the brace design

35、in the supplied images. Note the Rev1 Top cover will not fit properly on the original heatsink. Top Cover Part Numbers MODEL PART NUMBER SERIAL NUMBER REF475A SG-0016-2601 EV0001-01000 to EV0001-09138 REF475A SG-0001-2607 EV0001-09139 And above REF1300A SG-0016-2601 EV0003-01000 to EV0003-08606 REF1

36、300A SG-0001-2607 EV0003-08607 And above REF1600A SG-0016-2601 EV0004-01000 to EV0004-11811 REF1600A SG-0001-2607 EV0004-11812 And above 475a Reference Series 8 123456 A B C D 654321 D C B A INPUT L AUX OUT L AUX OUT R INPUT R OP OP OP OP 1 2 3 4 IMS INPUT 23 1 4 A MODE:FRONT/REAR/SUB 23 1 4 A MODE:

37、FRONT/REAR/SUB 23 1 4 A 23 1 4 A MODE:RIGHT/STEREO/LEFT MODE:RIGHT/STEREO/LEFT 13 2 A 13 2 A OP OP 10100K32320 MODE HP/FLAT/LP VARIABLE LPF/HPF 32Hz-320Hz/12dB 10100K32320 MODE HP/FLAT/LP VARIABLE LPF/HPF 32Hz-320Hz/12dB 10100K50 10100K50 BASS BOOST VARIABLE 0dB-6dB/50Hz BASS BOOST VARIABLE 0dB-6dB/

38、50Hz AMP AMP INPUT RL INPUT RR OP OP 1 2 3 4 IMS INPUT 23 1 4 A MODE:FRONT/REAR/SUB 23 1 4 A MODE:FRONT/REAR/SUB 23 1 4 A 23 1 4 A MODE:RIGHT/STEREO/LEFT MODE:RIGHT/STEREO/LEFT 13 2 A 13 2 A OP OP 10100K32320 MODE HP/FLAT/LP VARIABLE LPF/HPF 32Hz-320Hz/12dB 10100K32320 MODE HP/FLAT/LP VARIABLE LPF/H

39、PF 32Hz-320Hz/12dB 10100K50 10100K50 BASS BOOST VARIABLE 0dB-6dB/50Hz BASS BOOST VARIABLE 0dB-6dB/50Hz AMP AMP MAIN AMP FRONT L MAIN AMP FRONT R MAIN AMP REAR RL MAIN AMP REAR RR 4 ohm/2 ohm 4 ohm/2 ohm speaker speaker speaker BTL-4ohm 4 ohm/2 ohm 4 ohm/2 ohm speaker speaker speaker BTL-4ohm power s

40、upplyBattery +VCC -VCC +15V -15V 475a Reference Series 9 475a Reference Series 10 475a Reference Series 11 475a Reference Series 12 475a Reference Series 13 475a Reference Series 14 475a Reference Series 15 REFERENCE 475a Electrical Parts List Part NumberQty Reference Designator Main PCB Resistors 0

41、701-9101-02ResistorSMD 100 1/2W 5% 25122 R46 R16 0701-3103-02ResistorSMD 10K 1/4W 5% 12061 R50 0702-4220-02Resistor 1W 22 5% 2 R20 R19 0702-4471-02Resistor 1W 470 5% 4 R76 R75 R77 R78 0701-2220-02ResistorSMD 22 1/8W 5% 08051 R43 0701-2470-03ResistorSMD 47 1/8W 1% 080524 R16D R16C R16B R16A R15D R15C

42、 R15B R15A R14D R14C R14B R14A R13D R13C R13B R13A R4D R4C R4B R4A R3D R3C R3B 0701-2101-02ResistorSMD 100 1/8W 5% 080510 R64 R42 R41 R40 R39 R38 R12D R12C R12B R12A 0701-2221-03ResistorSMD 220 1/8W 1% 08052 R70 R17 0701-2102-03ResistorSMD 1K 1/8W 1% 080527 R120A R120 R119A R119 R44 R31 R30 R29 R28

43、R17C R17B R17A R17D R2D R2C R2B R2A R1D R1C R1B R1A R15 R26 R112A R112 0701-2821-02ResistorSMD 820 1/8W 5% 08058 R23D R23C R23B R23A R24D R24C R24B R24A 0701-2202-02ResistorSMD R0805 2K 1/8W 5% 6 R2 R71 R138 R137 R136 R135 0701-2302-02ResistorSMD 3K 1/8W 5% 08051 R13 0701-2332-03ResistorSMD 3.3K 1/8

44、W 1% 08055 R47 R18D R18C R18B R18A 0701-2432-03ResistorSMD 4.3K 1/8W 1% 08054 R19D R19A R19C R19B 0701-2472-02ResistorSMD 4.7K 1/8W 5% 08053 R36 R11 R37 0701-2682-03ResistorSMD 6.8K 1/8W 1% 080518 R5 R9D R9C R9B R9A R8D R8C R8B R8A R118A R118 R117 R117A R116A R116 R115A R115 R51 0701-2822-02Resistor

45、SMD 8.2K 1/8W 5% 08051 R134 0701-2103-02ResistorSMD 10K 1/8W 5% 080552 R23 R133 R132 R131 R130 R113A R113 R110A R110 R109A R109 R108A R108 R107A R107 R104A R104 R103A R103 R102A R102 R101A R101 R100A R100 R73 R54 R34 R22 R21 R11D R11C R11B R11A R10D R10C R10B R10A R7D R7C R7B R7A R6D R6C R6B R6A R5D

46、 R5C R5B R5A R1 R6 0701-2203-03ResistorSMD 20K 1/8W 1% 08055 R26D R26C R26B R26A R48 0701-2153-02ResistorSMD 15K 1/8W 5% 08051 R53 0701-2183-02ResistorSMD 18K 1/8W 5% 08053 R7 R9 R8 0701-2223-02ResistorSMD 22K 1/8W 5% 08052 R35 R18 0701-2303-03ResistorSMD 30K 1/8W 1% 08055 R128 R127 R124 R106 R10 07

47、01-2334-02ResistorSMD 330K 1/8W 5% 08051 R3 0701-2333-02ResistorSMD 33K 1/8W 5% 08052 R45 R65 0701-2113-02ResistorSMD 11K 1/8W 5% 08051 R27 0701-2123-02ResistorSMD 12K 1/8W 5% 08051 R24 0701-2623-03ResistorSMD 62K 1/8W 1% 08054 R125 R114A R114 R106A 0701-2104-02ResistorSMD 100K 1/8W 5% 080512 R25 R1

48、11 R12 R4 R27D R27C R27B R27A R33 R52 R55 R79 0701-3151-02ResistorSMD 150 1/4W 5% 12068 R21D R21C R21B R21A R20D R20C R20B R20A 0701-3472-02ResistorSMD 1/4W 4.7K 5% 12063 R63 R62 R49 0701-54R7-02ResistorSMD 4.7 1/2W 5% 25126 R25D R25C R25B R25A R122 R121 0706-5101-02Resistor 5W 100 5% 2 R61 R60 0705-50R1-06Resistor 5W 0.1*2 5% 26*5*18MM 4 R22D R22C R22B R22A 1201-1021-03Variable Resistor1k 4 RW1D RW1C RW1B RW1A 0701-2752-02ResistorSMD 7.5K