Related Manuals for Infinity BU-150
Summary of Contents for Infinity BU-150
- Page 1 BU-150 Powered Subwoofer SERVICE MANUAL Infinity Systems Inc. 250 Crossways Park Drive Woodbury, N.Y. 11797 1-800-553-3332 A Harman International Company Rev A 3/2000...
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Page 2: Safety Information
BU-150 Amplifier/Subwoofer SAFETY INFORMATION Warning Leakage/Resistance Check Any person performing service of this unit will be exposed to Before returning the unit to the customer, perform a leakage hazardous voltages and the risk of electric shock. It is or resistance test as follows: assumed that any person who removes the amplifier from this Leakage Current. -
Page 3: Table Of Contents
TABLE OF CONTENTS SAFETY INFORMATION ..........2 BU-150 AMPLIFIER ASSEMBLY EXPLODED VIEW..15 GENERAL SPECIFICATIONS..........3 BU-150 PCB (Version 3.52) Component Side Trace ..16 DETAILED SPECIFICATIONS .........4 BU-150 PCB (Version 3.52) Solder Side Trace ....17 CONTROLS AND THEIR FUNCTION ......6 BU-150 PCB (Version 3.53) Component Side Trace ..18 BU-150 CONNECTIONS ..........7... -
Page 4: Detailed Specifications
BU-150 Amplifier/Subwoofer DETAILED SPECIFICATIONS LINE VOLTAGE Yes/ Hi/Lo Line Nom. Unit Notes US 120vac/60Hz 108-132 Vrms Normal Operation Parameter Unit Test Conditions Notes cific Limits atio Amp Section Type (Class AB, D, Class D Preferred...Sink other) required for Class AB... - Page 5 BU-150 Amplifier/Subwoofer Limiter (yes/no) THD at Max. Output functional Maximum Output Maximum THD as a result of Power Power limiting. Features Phase Switch (yes/no) — functional 45 deg additional phase shift/switch op.OK Volume pot Taper LOG — functional (lin/log) Input Configuration —...
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Page 6: Controls And Their Function
BU-150 Amplifier/Subwoofer CONTROLS AND THEIR FUNCTION High-Level input and Output terminals SPKR SPKR Low-Level Input Jacks: connect to preamplifier outputs Low Pass: This is the crossover frequency control which determines the upper-corner roll-off points. Power-On indicator Phase: 0/180 switch to change audio-signal polarity. -
Page 7: Bu-150 Connections
BU-150 Amplifier/Subwoofer BU-150 CONNECTIONS When connecting your subwoofer make sure you turn all the power off. There are several ways to connect your subwoofer. Read this section carefully to determine which method is best suited for your installation. The subwoofer may be fed directly with a low-level... - Page 8 BU-150 Amplifier/Subwoofer When using a single subwoofer, you MUST use a pair of stereo low-level leads from your preamplifier's outputs. When using two subwoofers, one for the left and another for the right channels, connect the left preamplifier output to BOTH the left and right LOW-LEVEL INPUTS of the subwoofer used for the left channel by using a Female-to-Male “Y”...
- Page 9 BU-150 Amplifier/Subwoofer Figure 5. - Use this method when using two subwoofers. Figure 6. - Use this method when connecting one subwoofer to satellites. Depending on whether you are using one or two subwoofers, connecting your satellites can be accomplished in one of two ways. If you are using a single subwoofer with a pair of satellites, connect them as shown in Figure 7.
- Page 10 BU-150 Amplifier/Subwoofer Figure 7. - Use this method when c o n n e c t i n g t w o s u b w o o f e r s t o satellites. If you are using two subwoofers as a stereo pair with a pair of satellites, connect them as shown in Figure 7.
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Page 11: Operation
BU-150 Amplifier/Subwoofer OPERATION Setting the Controls Room Placement 1. Initially set the subwoofer's Volume control to the minimum 8. The room placement of the subwoofer is the most critical position. aspect of its installation. It will be necessary for you to try various locations in your listening room before you choose 2. -
Page 12: Bu-150 Test Set Up And Procedure
BU-150 Amplifier/Subwoofer BU-150 TEST SET UP AND PROCEDURE AC VOLT METER ( 6V ) BU-150 UNDER TEST SPKR SPKR LINE LEVEL CD PLAYER OUTPUT OUTPUT FROM FROM AMPLIFIER AMPLIFIER PRE AMP FROM PRE AMP FROM PRE AMP AMPLIFIER Line Input... -
Page 13: Bu-150 Power Amp Module Testing Flow Chart
BU-150 Amplifier/Subwoofer BU-150 POWER AMP MODULE TESTING FLOW CHART START Check V+, V-, +/-15V voltage to Resistance module check Check between V+ transformer, V- and O/P CMC, O/P to GND rectifier, C1, should > 5K C2, D9, D10, R16, R17... -
Page 14: Bu-150 Packing & Cabinet Assembly
BU-150 Amplifier/Subwoofer BU-150 PACKING & CABINET ASSEMBLY SCREWS (4) FEET PART (Set of 4) #200310 FOOT BASE BU-150 CABINET ASSEMBLY (Each) #200870 SCREWS (8) TRIM RING #200401 15" WOOFER #200400 CABINET NOT FOR SALE SCREWS (10) TOP STYROFOAM COVER PAD... -
Page 15: Bu-150 Amplifier Assembly Exploded View
BU-150 Amplifier/Subwoofer BU-150 AMPLIFIER ASSEMBLY EXPLODED VIEW Description Ref.# Part # A70302 Knobs SPKR SPKR 70317 Face Plate (Aluminum) SAFETY PART 70318 PCB Support SAFETY PART 70150 Phase Switch 70170 #4 x 0.5" Screws to secure input jacks 70171 #10 x 1" machine screw Bolts... -
Page 16: Bu-150 Pcb (Version 3.52) Component Side Trace
BU-150 Amplifier/Subwoofer BU-150 PCB (Version 3.52) Component Side Trace... -
Page 17: Bu-150 Pcb (Version 3.52) Solder Side Trace
BU-150 Amplifier/Subwoofer BU-150 PCB (Version 3.52) Solder Side Trace... -
Page 18: Bu-150 Pcb (Version 3.53) Component Side Trace
BU-150 Amplifier/Subwoofer BU-150 PCB (Version 3.53) Component Side Trace... -
Page 19: Bu-150 Pcb (Version 3.53) Solder Side Trace
BU-150 Amplifier/Subwoofer BU-150 PCB (Version 3.53) Solder Side Trace... -
Page 20: Bu-150 Electrical Parts List
BU-150 Amplifier/Subwoofer BU-150 ELECTRICAL PARTS LIST REF # PART # DESCRIPTION REF # PART # DESCRIPTION BU-150 PCB REV 3.5 30514 47nF 50V +80/-20% Mono-ceramic axial C4, 5 30504 100nF 50V +80/-20% Mono-cer rad 0.2" Resistors /ax 0.3" 30709 4.7uF 100V +80/-20% Electrolytic Radial 40702 6.8MW... -
Page 21: Bu-150 Integrated Circuit Diagrams
BU-150 Amplifier/Subwoofer BU-150 INTEGRATED CIRCUIT DIAGRAMS S53AMI/S64AMI - Power Amp module SAFETY PART NOTE: THE FOLLOWING PROCEDURES MUST BE FOLLOWED WHEN INSTALLING NEW S53AMI/S64AMI AMP MODULES: FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS MAY RESULT IN THE INSTANT DESTRUCTION OF THE MODULE WHEN POWERED UP. -
Page 22: Bu-150 Schematic 1 Of 2
BU-150 Amplifier/Subwoofer BU-150 SCHEMATIC 1 of 2... -
Page 23: Bu-150 Schematic 2 Of 2
BU-150 Amplifier/Subwoofer BU-150 SCHEMATIC 2 of 2...