Power Failure Mode - Panasonic KX-TG8162ALB Service Manual

KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB

9.1.12. Power failure mode

9.1.12.1. Operation with supply from handset under electric power failure
After base and handset make link, pull out AC plug of base from the socket.
Put handset on base under electric power failure.
Does set make link in 90 seconds?
No
What is indicated
on LCD of
handset?
Cross Reference:
Supply from handset (P.17)
9.1.12.2. Continuing a call during power failure
Press talk key and wait for 3 minutes.
Pull out the AC plug of base from the socket.
Discontinuing a call
Press talk key after plug in and wait for
3 minutes , check Vcap.
Under 2.9V
Check supply from large capacitor circuit
Cross Reference:
Supply from large capacitor (P.17)
None
Battery Low state
"Base no power ..."
"Place on
Is pulse voltage of
base ..."
handset CHG+
settled from 0.2V to
2.0V in the state of
connecting base and
handset?
"Supplying ..."
What volt is handset
CHG+ in the state
of connecting base
and handset?
Over 2.9V
Yes
OK
Check user setting about power
Use the battery charged enough
and check again.
Check charge terminal's impurities.
Press OFF and check again.
Yes
Check R18 or R19 or BBIC of handset
No
Check C362, C363. (base)
Under 2.0V
Check supply circuit of handset.
Check supply circuit of base and
charge terminal's impurities.
Over 2.0V
Continuing a call
OK
Check CAP_SW circuit and BBIC port control.
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