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VA 300 service manual
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VA 300
OPERATING AND SERVICE MANUAL
Manufactured by
SHURE BROTHERS INC.
222 Hartrey Avenue
Evanston, Illinois 60204 U. S. A.
Copyright 1978, Shure Brothers Inc.
AL404 (RE) 27A819
Printed in U. S. A.
Contents
Main
VA300 SPECIFICATIONS
VA300-C Console
2,200
155
VA300-C Console (contd)
DESCRIPTION
Front Panel Controls
Rear Panel Controls and Connections
OPERATING INSTRUCTIONS
General Operating Instructions:
Input Connections:
Output Connections:
Speakers:
Column Speaker Placement:
Power Connections:
Thermal Overload/Ventilation:
Anti-Feedback Switches:
Mixing:
Reverb:
To Tape Recorder:
SPECIAL OPERATING INSTRUCTIONS
Echo:
Tape Recording:
Playing Tapes:
Phonographs:
Musical Instruments:
Low Impedance Microphones:
Additional Inputs Using a Mixer:
Additional Inputs Using a Second VA300-C:
Additional Power or Area Coverage:
Microphone Cuing:
Stereo Operation:*
Connecting a VU Meter:
VA300-C FUNCTIONAL DIAGRAM
SERVICE INSTRUCTIONS
Amplifier Service (See Guarantee):
Amplifier Removal:
Front Panel Removal:
Driver Transistors:
Output Transistors:
Small Signal and Predriver Transistors:
Diodes:
Check Transistors and Diodes:
Power Drain Resistor (RSEL):
Lamp Replacement:
Reverberation Assembly:
Replacement Parts:
VA300-S Speaker Servicing:
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Notes to Circuit Diagram
D.C. Voltage Measurements:
A.C. Voltage Measurements:
Ohmmeter Measurements:
