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KX-TGH210RUB/KX-TGH210RUW/KX-TGH212RUB/KX-TGH220RUB/KX-TGH220RUW/KX-TGH222RUB/KX-TGHA20RUB/KX-TGHA20RUW
4.7.
Behavior of Electric Power Failure
In case that the power from AC adaptor is lost and lose radio waves, BBIC (IC1) turns Q11 ON since handset presumes that
base unit's power is falied.
Base unit detects that power voltage of AC adaptor +5.5V is OFF, then turns Q351 ON.
It's possible to use the units during the power failure, supplying power to VBAT of base unit from battery of handset through
Q10, CHG terminal and Q351.
base unit's power is falied.
Base unit detects that power voltage of AC adaptor +5.5V is OFF, then turns Q351 ON.
It's possible to use the units during the power failure, supplying power to VBAT of base unit from battery of handset through
Q10, CHG terminal and Q351.
Battery
R45
R11
Q11
R12
R13
71
BBIC
IC1
CHG-
CHG+
R359
R351
R352
+5.5V
Q353
Q352
Q10
Q351
VBAT
R962
R963
Power Down
DET
(Q907,Q908)
+5.5V
R355
PDN_DET
IC501-58pin
Handset
Base Unit
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