Panasonic KX-FT63BX Service Manual page 65

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 (P.65)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
Note:
{ }: Inside the digital board
[ ]: Inside the operation board
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KX-FT63BX / KX-FT63BX-W