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8
KX-A406CE/KX-A406UK/KX-A406AL
4.3.3.
Power Supply Circuit
The power supply voltage from AC adaptor is converted to VBAT (3.0 V) in IC302. VBAT is used for BBIC and all peripherals.
Circuit Operation:
Circuit Operation:
4.3.4.
RF Signal Route
Signal route
The parts marked *1 are located inside the shield box and cannot be seen from the outside.
5.05V
6.5V
VBAT
RSTN(Reset)
pin 54
VBAT
pin 10
pin 57
pin 9
IC501
IC302
IC611
BBIC
VDDC (1.2V)
3.0V
REGULATOR
STM/CKM
RF Part
EEPROM
RSSI* /ID LED
STATUS LED
Startmonitor
(IC501 57pin)
VDDC (1.2 V)
VBAT
Reset (RSTN)
(IC501_54 pin)
(IC501_54 pin)
BBIC chip initialize
(CKM/STM)
AC Adaptor
Q301
IC301
DC/DC
C371
1
*1 RSSI : Received Signal Strength Indication
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