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VA 300
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VA300-C CIRCUIT DIAGRAM
ISSUE 6
21
Figure 18
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:
