6.6.8. ANALOG BOARD SECTION
This chapter provides the testing procedures required for the analog parts. A signal route to be
tested is determined depending upon purposes. For example, the handset TX route begins at the
handset microphone and the signalis output to the telephone line. The signal mainly flowing on
this route is analog. You can trace the signal with an oscilloscope. The signal flow on each route
is shown in the Check Sheet here. If you find a specific problem in the unit, for exampleif you
cannot communicate with the H/S, trace that signal route locally with the following Check Sheet
and locate the faulty point.
6.6.8.1. CHECK SHEET
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