Accessory Detection

XEARP signal has a 3OOk pullup (R2O3) and 1OOk pulldown resistor (R1O9). By these the HEADDET is pulled up when an accessory is connected, and pulled down when disconnected. See Figure 29, "External Audio Interface - Speaker," on page 59 . (The system connector must be assembled otherwise the transceiver will assume that some accessory is connected!)

HOOKDETand HEADDET Truth Table

Accessory connected

HeadDet

Notes

No accessory connected

Low

-

An accessory connected

High

XEAR and XMIC loaded (dc)

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DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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