Panasonic KX-FT71LA-B Service Manual page 82

Note:
{ }: Inside the digital board /
2.3.7.2. DEFECTIVE ITS (INTEGRATED TELEPHONE SYSTEM) SECTION
2.3.8. POWER SUPPLY BOARD SECTION
1. Key components for troubleshooting
Check the following parts first: F101, D101-D104, C106, Q101, PC101 and IC101.
This comes from our experience with experimental tests. / For example: power supply and
lightning surge voltage test, with standing voltage test, intentional short circuit test, etc.
Caution:
If you find a melted fuse in the unit, do not turn on the power until
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