Crown Com-Tech CT-1610 - Page 3

Com-Tech 810 and 1610 Amplifier Service Manual
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Rev. 0
Table of Contents
1 Introduction .............................................................................. 1-1
1.1 The Com-Tech Series ....................................................... 1-1
1.2 Warranty ........................................................................... 1-1
2 Specifications .......................................................................... 2-1
2.1 Performance ..................................................................... 2-1
2.2 Power ............................................................................... 2-1
2.3 Controls............................................................................ 2-1
2.4 Indicators ......................................................................... 2-2
2.5 Input/Output ..................................................................... 2-2
2.6 Output Signal ................................................................... 2-2
2.7 Protection ......................................................................... 2-2
2.8 Construction ..................................................................... 2-2
3 AC Power Draw and Thermal Dissipation ................................ 3-1
4 AC Mains Voltage Conversion ................................................. 4-1
4.1 Com-Tech Voltage Conversion ........................................ 4-1
4.1.1 120 VAC, 60 Hz Units .............................................. 4-1
4.1.2 100/120 VAC Export Units ....................................... 4-1
4.1.3 220/240 VAC Export Units ....................................... 4-1
5 Theory ...................................................................................... 5-1
5.1 Overview .......................................................................... 5-1
5.2 Front End Operation ......................................................... 5-1
5.2.1 Balanced Gain Stage (BGS) .................................... 5-1
5.2.2 Variable Gain Stage (VGS) ...................................... 5-1
5.2.3 Error Amp................................................................. 5-2
5.3 Voltage Amplification ....................................................... 5-2
5.3.1 Voltage Translators .................................................. 5-2
5.3.2 Last Voltage Amplifiers (LVAs) ................................. 5-2
5.4 Grounded Bridge Topology ............................................. 5-3
5.4.1 High Side (HS)......................................................... 5-3
5.4.2 Low Side (LS) .......................................................... 5-4
5.5 Output Device Emulation Protection (ODEP) ................... 5-4