Infinity Reference7520 & 7521 free download

File name Infinity-Reference7520_7521 caramp.pdf

Reference Series 7520a 7521a 2 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev3aa10/2005 Power Amplifier Reference 7520a/7521a - CONTENTS - SPECIFICATIONS ...1 FEATURES/TEST CONDITIONS...2 CONTROLS/CONNECTIONS...3 INSTALLATION...5 BASIC TROUBLESHOOTING...6 TYPICAL SYSTEM WIRING...7 EXPLODED VIEW/PARTS LIST...8 MECHANICAL PARTS LIST...9 AMPLIFIER BLOCK DIAGRAM...10 P.C.B. DRAWINGS...11 ELECTRICAL PARTS LIST ... 14 REF 7521a ELECTRICAL PARTS LIST ADDENDUM...17 IC/TRANSISTOR PINOUTS...18 REF 7520a SCHEMATICS...20 REF 7521a SCHEMATICS...22 PACKING...24 Reference 7520a/7521a Specifications Output Power: 97W RMS x 2 channels @ 4 ohms; 1% THD + N (14.4V supply) 142W RMS x 2 channels @ 2 ohms; 1% THD + N 283W RMS x 1 channels @ 4 ohms; 1% THD + N Signal-to-noise ratio: 83dBA (reference 1W into 4 ohms) Dynamic power: 190W @ 2 ohms Effective damping factor: 6.389 @ 4 ohms Frequency response: 10Hz ­ 69kHz (­3dB) Maximum input signal: 5.5V Maximum sensitivity: Reference 7520a - 240mV Reference 7521a - 75mV DC Offset <50mV (-50%) Output regulation: .078dB @ 4 ohms Idle Current 900mA Input Impedance 22k