Telex 1505 service manual Mounting, Access for Installation/Servicing, Power

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3.3 Mounting

This card is intended to be mounted in a Tellabs Type 10 or equivalent open frame rack. To avert erroneous operation, don’t install the card adjacent to equipment that generates high temperature or electromagnetic radiation. Al- ways provide an appropriate service loop on in- terconnecting cables.

3.4 Access for Installation/Servicing

When installing into a Tellabs Type 10 or equivalent open frame rack, ensure the front and rear of the rack have clear access for card installation and wiring.

To service, remove the 1505 from the rack or place on a circuit card extension for access while troubleshooting.

3.5 Power

Primary power for the card is a regulated source of 12 Vdc.

Figure 1. 1505 Component Location

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Contents Audio Line Driver Table of Contents Optional Features includeInspection Access for Installation/Servicing PowerMounting Signal Connections and Card Edge Con- nector Pin Assignment Function Jumper Status OutJumper Options Parallel Transmit Line Impedance Matching Switch SettingsMicrophone Jumpers Receive Line Input ImpedanceOperation Description Interface connector NumberingControls and Indicators Securing the ConnectionsComponent Side Card Edge Connector Pin Assignments Solder SideTransmit Line Amplifier Theory of Operation GeneralReceive Amplifier Compression Limiter CircuitPage Page Page Microphone Input IndicatorsPower Supply Warranty LimitedSpecifications Parts List Part No. Description Ckt Sym Conn Jumper Plug JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 East Cornhusker Highway, Lincoln, Nebraska