Shure service manual SR105 Power Amplifier Circuit Diagram

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LINE LEVEL INPUTS

120VAC 50160 Hr

NOTE I: DIFFERENCES BETWEEN SRIOSA AND SR105B: "STRAIGHT- THROUGH"

 

 

WIRING SHOWS SRlOSB CIRCUITS; SRIOSA CIRCUITS INCLUDE

SRIOSB

 

ASSEMBLY A2, SWITCH S4, TRANSFORMER T3, AND TERMINAL

REFERENCE

DESCRIPTION

STRIP TS2.

NO.

 

 

--

 

 

R I, R 9 WERE 12kb C13 ADDED

 

 

C17, CIB ADDED

FIGURE 21. SR105 POWER AMPLIFIER CIRCUIT DIAGRAM

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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 InstructionsInput Connections Power RequirementsMounting and Ventilation Thermal OverloadSR105 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 TransistorsChecking Transistors and Diodes Output TransistorsDiodes Diode Bridge RectifierWHT GRN RED YEL BLKCOM GND Service IllustrationsJI J2 Page XF1 RKC37TB1 TB2IRC CEC-TO RKC53RKC9 Main Circuit Board Parts Location Diagram DC Voltage Measurements TroubleshootingGeneral AC Voltage MeasurementsPage SR105 Power Amplifier Circuit Diagram Page Condensed Operating Instructions Architects Andengineers SpecificationsConstant Voltage 70-VOLT Speaker Output