Allen&Heath GR1 SERVICE MANUAL User Manual
Page 4
ALLEN & HEATH
3
R1SM1
CONTENTS
SECTION A
INTRODUCTION ................................................................................................................ 1
SERVICE & TECHNICAL SUPPORT ................................................................................. 1
PRECAUTIONS .................................................................................................................. 1
INTERCONNECTIONS ....................................................................................................... 2
ADJUSTING THE LEVELS ................................................................................................. 2
SPECIFICATION ................................................................................................................ 3
CONNECTIONS ................................................................................................................. 3
INSTALLATION .................................................................................................................. 4
CONNECTING POWER ..................................................................................................... 4
FRONT PANEL CONTROLS .............................................................................................. 5
CONFIGURATION .............................................................................................................. 6
EARTHING THE AUDIO SYSTEM ..................................................................................... 7
MIC INPUTS ....................................................................................................................... 7
LINE INPUTS ...................................................................................................................... 8
CHANNEL DIRECT OUTPUTS .......................................................................................... 8
ROUTING THE CHANNELS ............................................................................................... 9
L,R,M SYS-LINK INPUT/OUTPUT ..................................................................................... 9
MAIN OUTPUTS ................................................................................................................. 9
PRIORITY DUCKING SYSTEM .......................................................................................... 10
COMPRESSOR/LIMITERS ................................................................................................ 10
REMOTE CONTROL .......................................................................................................... 11
ALARM OVERRIDE ............................................................................................................ 12
INPUT EXPANSION WITH SYS-LINK ............................................................................... 13
OUTPUT EXPANSION WITH SYS-LINK ........................................................................... 14
BLOCK DIAGRAM .............................................................................................................. 15
SECTION B
TECHNICAL DESCRIPTION .............................................................................................. 2
WHEN A FAULT IS SUSPECTED ...................................................................................... 3
REMOVING THE PCB ........................................................................................................ 4
VCA CALIBRATION ............................................................................................................ 5
ORDERING SPARE PARTS .............................................................................................. 6-7
SECTION C
TECHNICAL BULLETINS ................................................................................................... 2
FRONT & REAR PANEL LAYOUT ..................................................................................... 3
BLOCK DIAGRAM .............................................................................................................. 4
INTERNAL LAYOUT ........................................................................................................... 5
PCB COMPONENT IDENT ................................................................................................ 6
PCB COMPONENT VALUES ............................................................................................. 7
CIRCUIT DIAGRAMS (11 pages) ....................................................................................... 8-18
AC MAINS VOLTAGE ......................................................................................................... 19