Shure service manual SR105 Power Amplifier

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SR105 Power Amplifier

OPERATION AND SERVICE MANUAL

Manufactured by

SHURE BROTHERS INC.

222Hartrey Avenue Evanston, Illinois 60204 U.S.A.

W A R N I N G

To reduce the risk of fire or electric shock, do not expose this appliance to rain or extreme moisture.

Copyright 1979, Shure Brothers Inc.
27A888 (SJ) (95B652)	Printed in U.S.A.

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Contents SR105 Power Amplifier Specifications Iii Page Table of Contents Page Description SR105 Power AmplifierSR105 Power Amplifier Front Panel General Operating Instructions Operating InstructionsMounting and Ventilation Power RequirementsThermal Overload Input ConnectionsSR105 Power Amplifier Block Diagram Output Connections Direct Output only AMPLIFIER-TO-SPEAKER Distance Meters Recommended Wire Gauge VS. AMPLIFIER-TO-SPEAKER DistanceOutput Voltage Meter Volt OutputBasic Operating Hints Special Operating InstructionsAdding SR105A Amplifiers in a 70-VOLT System Cascaded Adding Headphone Jack to Speaker Connections Bridging ConnectionsCoil Service Instructions Printed Circuit Board Removal Driver Transistors Small Signal and Predriver TransistorsDiodes Output TransistorsDiode Bridge Rectifier Checking Transistors and DiodesWHT GRN RED YEL BLKCOM GND Service IllustrationsJI J2 Page TB1 RKC37TB2 XF1IRC CEC-TO RKC53RKC9 Main Circuit Board Parts Location Diagram General TroubleshootingAC Voltage Measurements DC Voltage MeasurementsPage SR105 Power Amplifier Circuit Diagram Page Condensed Operating Instructions Architects Andengineers SpecificationsConstant Voltage 70-VOLT Speaker Output