Infinity Reference Series Service Manual
4,3,2 channel power amplifier
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Also See for Reference Series:
- Service manual (31 pages) ,
- Instructions (4 pages) ,
- Instructions manual (8 pages)
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Summary of Contents for Infinity Reference Series
- Page 1 Reference Series 475a 4,3,2 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 8/2007 Released 2007 Discontinued XXXX...
- Page 2 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.
- Page 3 475a Reference Series INFINITY REFERENCE 475a AMPLIFIER SPECIFICATIONS TEST VOLTAGE 14.4 +0.1V Specification Rating Unit Remarks Power Output 4ohm loads @1kHz ≥75W x 4 Watts (stereo mode) for each ch @<1.0%THD (Unit:W)(LPF=22K) Power Output 2ohm loads @1kHz (stereo mode) for each ch @<1.0%THD ≥90W x 4...
- Page 4 475a Reference Series PACKAGING Item Part Number Description CH4482901203 Outer Carton REF475a REF475a Amplifier Plastic Bag BZL279112001 Packing Foam Visit Infinitysystems.com Owner's manual Plastic Bag Accessory kit consisting of: LS1CJ0402507 Mounting Screws 1601-353G-00 SPARE 35A FUSES...
- Page 5 475a Reference Series – 475a PPLICATIONS The 475a can be set up for stereo 4-channel, To Head Unit Rear Output 3-channel or bridged 2-channel operation, as Figure 5. 475a connected to full-range speakers. Note shown in Figures 5 through 8.
- Page 6 475a Reference Series – 475a PPLICATIONS To Head Unit Sub Output Figure 7. 475a connected in tri-mode to a subwoofer and a pair of satellite speakers. Note crossover and channel assignment settings. To Head Unit Front Output Front Speakers Subwoofer...
- Page 7 475a Reference Series NSTALLATION AND ETUP ROUBLESHOOTING Route the cable behind the dash or other • PROBLEM: No audio (POWER LED is off). Refer to the illustrations on the previous pages SETTING INPUT SENSITIVITY for control location. 1. Initially turn the INPUT LEVEL control(s) to interior panels and under the carpet.
- Page 8 475a Reference Series Item# Part Number Description SG-0016-2601 Top cover GD-600011400 Light panel SR-F475-0117 Main heat sink LSIFM0300011 Screw Main PCB MK-0005-2601 Front panel LS5KP0300807 Screw for F/RP LS5KJ0301007 Screw for terminal, RCA jacks XN-10500-012 Knob LSIAP0300607 Screw LSIAM0300607 Screw...
- Page 9 475a Reference Series INPUT L 100K 100K 4 ohm/2 ohm speaker MODE:FRONT/REAR/SUB MODE:RIGHT/STEREO/LEFT MODE HP/FLAT/LP BASS BOOST MAIN AMP VARIABLE LPF/HPF VARIABLE FRONT L 32Hz-320Hz/12dB 0dB-6dB/50Hz BTL-4ohm speaker MODE HP/FLAT/LP BASS BOOST MAIN AMP VARIABLE LPF/HPF VARIABLE IMS INPUT FRONT R...
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- Page 16 475a Reference Series REFERENCE 475a Electrical Parts List Description Part Number Qty Reference Designator Main PCB Resistors R46 R16 0701-9101-02 Resistor SMD 100Ω 1/2W ±5% 2512 0701-3103-02 Resistor SMD 10KΩ 1/4W ±5% 1206 R20 R19 0702-4220-02 Resistor 1W 22Ω ±5%...
- Page 17 475a Reference Series Description Part Number Qty Reference Designator Main PCB R59 R58 R57 R56 0701-2563-02 Resistor SMD 56KΩ 1/8W ±5% 0805 A50K R0971G2B W=5 L=15MM T=7.5MM 1204-5031-18 Variable Resistor VR100A VR100 M=1MM FREQ VR101 VR102 1204-5040-01 Variable Resistor C500K L=15mm ±10% BASS BOOST...
- Page 18 475a Reference Series Description Part Number Qty Reference Designator Main PCB D20 D19 D18 D17 D16 D15 D14 D13 D11 D4 D3 04PT-4148-01 Diode SMD 1N4148 DO-213AA D2 D2D D2C D2B D2A D1D D1C D1B D1A D1 04WY-213A-00 Diode 5.25V 04WY-39AV101 Diode SMD 3.9V DO-213AA 0.5W...
- Page 19 475a Reference Series Description Part Number Qty Reference Designator Input PCB R232 R233 R332 R333 0701-2823-03 Resistor SMD 82Ω 1/8W ±1% 0805 R227 R226 0701-2102-02 Resistor SMD 1KΩ 1/8W ±5% 0805 R315 R314 R313 R312 R245 R244 R215 R214 0701-2133-02 Resistor SMD 13KΩ...
- Page 20 475a Reference Series Description Part Number Qty Reference Designator LED BOARD 2PIN UL1007 red black 28AWG L=320mm 2102-0153-02 soldering 5mm 2PIN UL1007 red black 28AWG L=40mm 2102-0154-02 slodering 5mm 1502-0504-00 Jack DIP Pitch 2.0MM 5PIN Bend 90 degree 06S121046000 Capacitor SMD 0.1uF/50V 0805 X7R ±10%...
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- Page 22 475a Reference Series 4004 +VCC +VCC C11A C12A CL104 100U/50V 391/100V B647 D669 TIP35C R12A 5551 5551 100R W22U/50V R24A 100/100V 820R CH1SG C1815 CH1SG R33A R18A MUTE R27A MUTE 100K RT1A R20A R22A R13A R16A 0.10/5W 150R 1/4W 1U/50V...
- Page 23 475a Reference Series 4004 +VCC +VCC C11B C12B CL104 100U/50V 391/100V B647 D669 TIP35C R12B 5551 5551 100R W22U/50V R24B 100/100V CH2SG C1815 CH2SG R18B R33B MUTE R27B MUTE 100K R22B RT1B R20B R13B R16B 0.10/5W 150R 1/4W 1U/50V S8050...
- Page 24 475a Reference Series 4004 +VCC +VCC C11C C12C CL104 100U/50V 391/100V B647 D669 TIP35C R12C 5551 5551 100R W22U/50V R24C 100/100V CH3SG C1815 CH3SG R33C R18C MUTE R27C MUTE 100K RT1C R22C R20C R13C R16C 0.10/5W 150R 1/4W 1U/50V S8050...
- Page 25 475a Reference Series 4004 +VCC +VCC C11D C12D CL104 100U/50V 391/100V B647 D669 TIP35C R12D 5551 5551 100R W22U/50V R24D 100/100V CH4SG C1815 CH4SG R18D R33D MUTE R27D MUTE 100K R22D R20D R13D R16D RT1D 0.10/5W 150R 1/4W 1U/50V S8050...
- Page 26 C100 R103 CC22P 47U/16V 47U/16V CC104 CC104 CC104 CC104 +15VA 475a Reference Series C102 C103 SW100A CL473 CL823 R112 R101 C119 C125 C126 C113A C112A C117 R115 R120 VR100A U103B U101A FLAT A50K NJM4558 R100 VR100B R116 4558 U102A A50K...
- Page 27 475a Reference Series C218 CC101 C200 R200 R225 0R W22U/50V R207 R226 C211 U202B U200A CH1-in SW200A R220 C208 LM833 W22U/50V SW201A U205A R224 LM833 SW2P3T W22U/50V SW2P3T +15VA INPUT 220R R-OUT R243 R201 C214 U201A CC10P R216 LM833 R320...
- Page 28 475a Reference Series LED300 LED100 prol power 4148 47U/16V blue blue blue blue C1815 470R 1W LED1 LED2 LED3 LED4 7815 470R 1W 100/5W 4K70.25W A1015 CC104 1K 1/2W 100U/16V +VCC LED7 LED5 LED6 LED8 CC104 CON5 4148 CL104 blue...