Panasonic KX-TG7893AZ Operating Instructions Manual page 80

Useful Information
Bluetooth PIN
Problem
I cannot remember the PIN.
Liquid damage
Problem
Liquid or other form of moisture
has entered the handset/base
unit.
Caution:
R To avoid permanent damage, do not use a microwave oven to speed up the drying process.
80
Cause/solution
R Change the PIN using the following method.
1
MMENUN#619
2
*7000
3
Enter the new 4-digit PIN. a MOKN
4
Enter the new 4-digit PIN again. a MSAVEN a MOFFN
Cause/solution
R Disconnect the AC adaptor and telephone line cord from
the base unit. Remove the batteries from the handset and
leave to dry for at least 3 days. After the handset/base
unit are completely dry, reconnect the AC adaptor and
telephone line cord. Insert the batteries and charge fully
before use. If the unit does not work properly, contact an
authorised service centre.