Panasonic KX-TCD410SLS Service Manual page 8

The AC adaptor must remain connected at all times (It is normal for the adaptor to feel warm
during use).
- Never install telephone wiring during a lightning storm.
6.2. Symbols Used in This Service Manual
6.3. PIN Code
6.3.1. Base Unit
- To exit the operation, press any time.
For Service Hint:
* : If the current 4-digit PIN is forgotten, press and you will
be able to enter new PIN.
6.3.2. Handset
8