Table Of Contents - Art PRO CHANNEL II Service Manual

IMPORTANT SAFETY INSTRUCTIONS - READ FIRST...................................................................................................... II
INTRODUCTION..................................................................................................................................................................... 1
INSTALLATION ...................................................................................................................................................................... 2
AC Power Hookup.................................................................................................................................................................................. 2
Analog Audio Connections ..................................................................................................................................................................... 2
FRONT PANEL CONTROLS and JACKS............................................................................................................................. 3
Mic Preamp Controls .............................................................................................................................................................................. 3
Instrument Input ..................................................................................................................................................................................... 3
Gain Control ........................................................................................................................................................................................... 3
Impedance Control ................................................................................................................................................................................. 3
GAIN Switch ........................................................................................................................................................................................... 4
Phantom Power Switch .......................................................................................................................................................................... 4
Invert Switch........................................................................................................................................................................................... 4
Low Cut Control...................................................................................................................................................................................... 4
Preamp Output Control........................................................................................................................................................................... 4
Tube Voltage Switch .............................................................................................................................................................................. 5
Compressor Controls ............................................................................................................................................................................. 6
Threshold Control................................................................................................................................................................................... 6
Ratio Control .......................................................................................................................................................................................... 6
Attack Control......................................................................................................................................................................................... 7
Release Control...................................................................................................................................................................................... 7
Compressor Output Control.................................................................................................................................................................... 7
Gain Reduction LED Meter..................................................................................................................................................................... 8
Semi-Parametric EQ .............................................................................................................................................................................. 8
EQ Bypass Switch.................................................................................................................................................................................. 9
CLIP LED ............................................................................................................................................................................................... 9
Master Output Control ............................................................................................................................................................................ 9
Output Meters....................................................................................................................................................................................... 10
VU Meter Switches............................................................................................................................................................................... 10
REAR PANEL CONNECTIONS ........................................................................................................................................... 11
INPUT Jack .......................................................................................................................................................................................... 11
PREAMP OUT Jack ............................................................................................................................................................................. 11
COMP IN Jack...................................................................................................................................................................................... 12
COMP OUT Jack.................................................................................................................................................................................. 12
EQ IN Jack ........................................................................................................................................................................................... 12
OUTPUT Jacks .................................................................................................................................................................................... 12
OUTPUT LEVEL Switch ....................................................................................................................................................................... 12
APPLICATIONS.................................................................................................................................................................... 13
Bypassing Components Of The Pro Channel II.................................................................................................................................... 13
Optimizing The Preamp For Lowest Noise........................................................................................................................................... 13
WARRANTY INFORMATION............................................................................................................................................... 14
SERVICE............................................................................................................................................................................... 27
SPECIFICATIONS ................................................................................................................................................................ 28
LIST OF FIGURES
FIGURE 1 - Preamp section................................................................................................................................................... 5
FIGURE 2 - Compressor Section ........................................................................................................................................... 6
FIGURE 3 - Equalizer Section................................................................................................................................................ 8
FIGURE 4 - Signal Flow Block Diagram ................................................................................................................................ 9
FIGURE 5 - Output Section.................................................................................................................................................. 10
FIGURE 6 - Rear Jacks........................................................................................................................................................ 11
PRO CHANNEL II
TUBE PREAMP - OPTO COMPRESSOR - EQ
III