Orban 424A - Table of Contents

Table
of
Contents
About
This Manual
Registration Card
Warranty
I
Condensed Operating
Instructions
5
Part
A:
Introduction
5
Performance Highlights
6
Front-Panel
Description
6
Rear-Panel Description
7
Part
B:
Installation
7
Mechanical Installation
7
Electrical Installation
AC Power
Control Loop
Bass
Rolloff
Audio
Output
Preferred Wiring
Table
I:
General Input/Output
Connection Rules
Wiring The 424A With
Single-Conductor Shielded
Cable
1 1 Part
C:
Operating Instructions
II
Description and Function of
Front-Panel
Features
Using The Compressor/Limiter
Using
The
De-Esser
Adjusting
The OUTPUT
ATTEN Control
19 Some Specific
Applications
Adjusting
The 424A
To Provide Peak Overload
Protection
Stereo And Multichannel Operation
Speech-Activated
Ducking Of Music
21
Part
D:
Maintenance
21 Introduction
21
ALIGNMENT AND
PERFORMANCE
VERIFICATION
General
Power Supply
Signal Processing
Circuitry
27
MAINTENANCE
AND SERVICE
Preventive
Maintenance
Corrective
Maintenance
Service Access
Lamp Replacement
Component
Replacement
Replacement Parts
Replacement Of Components
On
Printed Circuit
Boards
Removal
Installation
Troubleshooting
1C
Opamps
Factory Service
Shipping Instructions
31 CIRCUIT DESCRIPTION
General
Input Buffer
Voltage-Controlled Amplifier (VCA) Operation
Current-Controlled
Gain
Exponential Converter
Compressor/Limiter
Circuitry
General
Rectifier With Threshold
Timing
Module
Threshold-Setting Circuitry and RATIO Control
Gating Circuitry
Gain Reduction Meter
De-Esser Control Circuitry
VCA
LEVEL Meter
Power Supply
40
APPENDIX
A:
INTERCONNECTIONS AND
GROUNDING
43
APPENDIX B: SPECIFICATIONS
44
PARTS
LIST
53 SCHEMATIC
54
PARTS LOCATOR