Telex 1505 service manual Audio Line Driver

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1505 Audio Line Driver

Service Manual

1505 MIXER/ LINE DRIVER

CH 1

CH 2

CH 3 MUTE

CH 4

SPKR

PTT

HANDSET

MIC

SPEAKER

CH 1

CH 2

CH 3 CH 4

CH 1 CH 2

CH 3

Tx

Rx

CH 4

LEVEL ADJUST

098-0355

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Contents Audio Line Driver Optional Features include Table of ContentsInspection Power Access for Installation/ServicingMounting Function Jumper Status Out Signal Connections and Card Edge Con- nector Pin AssignmentJumper Options Microphone Jumpers Switch SettingsReceive Line Input Impedance Parallel Transmit Line Impedance MatchingControls and Indicators Interface connector NumberingSecuring the Connections Operation DescriptionComponent Side Card Edge Connector Pin Assignments Solder SideReceive Amplifier Theory of Operation GeneralCompression Limiter Circuit Transmit Line AmplifierPage Page Page Power Supply IndicatorsWarranty Limited Microphone InputSpecifications Parts List Part No. Description Ckt Sym Conn Jumper Plug JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 East Cornhusker Highway, Lincoln, Nebraska