Panasonic KX-FT71LA-B Service Manual page 81

2.3.7. ANALOG BOARD SECTION
The analog parts check is actually different than the digital parts check. The signal route is
determined by the purpose of the check. For example, the handset TX route begins from the
handset microphone and is output in the telephone line. In this route, it is mainly an analog
signal. Tracing the signal can be done easily using an oscilloscope. Each route is shown on the
CHECK SHEET ()here. If there is a problem with the unit (for example, you cannot communicate
with the H/S, etc.), trace the signal in the area and determine the cause.
2.3.7.1. CHECK SHEET
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