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Table of Contents
Related Manuals for Klipsch SW12-I
Summary of Contents for Klipsch SW12-I
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Page 1: Service Manual
SERVICE MANUAL Subwoofer Amplifier Model: SW12-I SW15-I KLIPSCH, INC. -
Page 2: Table Of Contents
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a TABLE OF CONTENTS SPECIFICATIONS ............................2 Model: SW12-I ............................2 Model: SW15-I ............................2 THEORY OF OPERATION ........................3 INPUTS ..............................3 SIGNAL CONDITIONING ......................... 3 COMPRESSION............................3 DRIVER CIRCUIT ............................. 3 OUTPUT ..............................3 OTHER FEATURES........................... 4 ALIGNMENT PROCEDURES ........................ -
Page 3: Specifications
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a Specifications Model: SW12-I Input Sensitivity for max Rated Output: Line input 60mVrms @ 30Hz. Speaker input 700mVrms @ 30Hz. Maximum Rated Output: 150 Watts into 8 ohms. Max. Hum: 3.5mV @ 60Hz. Max. Distortion: 4% At Full Rated Output. -
Page 4: Theory Of Operation
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a THEORY OF OPERATION SW12, & SW15 Series I Amplifiers INPUTS There are two types of inputs and passive outputs. Four RCA jacks for LINE LEVEL left and right inputs and outputs and a panel of SPEAKER LEVEL inputs and outputs for left and right stereo channels. -
Page 5: Other Features
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a OTHER FEATURES This amplifier uses a control circuit to control the operation of the output relay. When power is first applied the circuit provides a delay before activating the relay. This is a protection feature to protect the speaker and amplifier from initial current surges. -
Page 6: Alignment Procedures
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW12-I AMPLIFIER ALIGNMENT PROCEDURE CAUTION! Lethal voltages are present and exposed when cover is off of amplifier. Only qualified service technicians should attempt to repair or align subwoofer amplifiers. Equipment required: A signal source capable of supplying a 30Hz sine wave at 300mVrms. -
Page 7: Model: Sw15-I
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW15-I AMPLIFIER ALIGNMENT PROCEDURE CAUTION! Lethal voltages are present and exposed when cover is off of amplifier. Only qualified service technicians should attempt to repair or align subwoofer amplifiers. Equipment required: A signal source capable of supplying a 30Hz sine wave at 300mVrms. -
Page 8: Trouble Shooting Guide
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a TROUBLE SHOOTING GUIDE CAUTION! Lethal voltages are present and exposed when cover is off of amplifier. Only qualified service technicians should attempt to repair or align subwoofer amplifiers. PROBLEM POSSIBLE CAUSE 1 Blows fuse with nothing connected 1 Check output transistors on power board. - Page 9 Klipsch Subwoofer Amplifier Service Manual KSAMM-002a TROUBLE SHOOTING GUIDE (continued) PROBLEM POSSIBLE CAUSE 3 Causing popping sound. 1 Connect amplifier output to a 16 ohm load. Apply a 60mVrms 30Hz signal to one RCA jack. The voltage across the load should be between 32.1 Vrms and 34 Vrms for SW12.
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Page 10: Sw12 Parts List
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW12-I PARTS LIST PART VALUE/PART NUMBER KLIPSCH PART # LEVEL CONTROL 10K VARIABLE LOWPASS ADJUST 50K VARIABLE, DUAL PHASE ADJUST 100K VARIABLE R1, R2, R3, R128, R137, R138 R12, R11 R13, R35, R36, R133, R134 R132 2.2 Meg... - Page 11 Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW12-I PARTS LIST (continued) PART VALUE/PART NUMBER KLIPSCH PART # C36, C37, C39, C40 330pF 4.7µF 25V Electrolytic 10µF 63V Electrolytic 10µF 25V Electrolytic .0027µF C8, C9 1µF 1N914B D5, D6 1N4752A Zener MC4741...
- Page 12 Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW12-I PARTS LIST (continued) PART VALUE/PART NUMBER KLIPSCH PART # 10µF 25V Electrolytic .1µF 125Vac D1, D2, D3, D4, D11, D12 1N4002 D13, D14, D15, D16, D17 1N914 Q15, Q18 MJF15030 118733 Q16, Q17, Q19, Q20...
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Page 13: Sw15 Parts List
Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW15-I PARTS LIST PART VALUE/PART NUMBER KLIPSCH PART # LEVEL CONTROL 10K VARIABLE LOWPASS ADJUST 50K VARIABLE, DUAL PHASE ADJUST 100K VARIABLE R1, R2, R3, R128, R137, R138 R12, R11 R13, R35, R36, R133, R134 R132 2.2 Meg... - Page 14 Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW15-I PARTS LIST (continued) PART VALUE/PART NUMBER KLIPSCH PART # C36, C37, C39, C40 330pF 4.7µF 25V Electrolytic 10µF 63V Electrolytic 10µF 25V Electrolytic .0027µF C8, C9 1µF 1N914B D5, D6 1N4752A Zener MC4741...
- Page 15 Klipsch Subwoofer Amplifier Service Manual KSAMM-002a SW15-I PARTS LIST (continued) PART VALUE/PART NUMBER KLIPSCH PART # 10µF 25V Electrolytic .1µF 125Vac D1, D2, D3, D4, D11, D12 1N4002 D13, D14, D15, D16, D17 1N914 Q15, Q18 MJF15030 118733 Q16, Q17, Q19, Q20...