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KX-TG6811UAB/KX-TG6811UAM/KX-TG6812UAB/KX-TG6821UAB/KX-TGA681RUB/KX-TGA681RUM
9.1.10.
Power failure mode
9.1.10.1. 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.
Put handset on base under electric power failure.
Cross Reference:
Supply from handset (P.17)
9.1.10.2. Continuing a call during power failure
Cross Reference:
Supply from large capacitor (P.17)
Does set make link in 90 seconds?
Yes
OK
No
What is indicated
on LCD of
handset?
None
Check user setting about power
Is pulse voltage of
handset CHG+
settled from 0.2V to
2.0V in the state of
connecting base and
handset?
Check charge terminal's impurities.
Press OFF and check again.
Press OFF and check again.
"Base no power ..."
"Place on
base ..."
base ..."
Check R18 or R19 or BBIC of handset
Yes
No
Check C362, C363. (base)
"Supplying ..."
What volt is handset
CHG+ in the state
of connecting base
and handset?
Over 2.0V
Under 2.0V
Check supply circuit of handset.
Check supply circuit of base and
charge terminal's impurities.
charge terminal's impurities.
Battery Low state
Use the battery charged enough
and check again.
and check again.
Press talk key and wait for 3 minutes.
Pull out the AC plug of base from the socket.
Continuing a call
OK
Discontinuing a call
Press talk key after plug in and wait for
3 minutes , check Vcap.
3 minutes , check Vcap.
Under 2.9V
Over 2.9V
Check supply from large capacitor circuit
Check CAP_SW circuit and BBIC port control.
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