Power Supply Circuit - Panasonic KX-PRX120W Service Manual

4.2.2.

Power Supply Circuit

The power is supplied to the DECT BBIC, QSPI FLASH MEMORY and EEPROM from AC Adaptor (+5.5 V) as shown in
Fig.101. The power supply is as follows;
• DECT BBIC (IC7):
DC Jack (+5.5 V) → IC2 → IC7
DC Jack (+5.5 V) → IC2 → Q9 → IC7
DC Jack (+5.5 V) → IC2 → Q8 → IC7
• EEPROM (IC401):
DC Jack (+5.5 V) → IC2 → IC7→ IC401
• QSPI FLASH MEMORY (IC431):
DC Jack (+5.5 V) → IC2 → IC7 → IC431
5.5 V
DCP
DC
DCM
Jack
AC Adaptor
1 DC S
2
1.8 V
3
Reset
(IC7_61pin)
IC2
On
2.4 V
Q9
1.8 V
Q8
<Fig.101>
9
KX-PRX120W/KX-PRXA10W
2.85 V
3.0 V
IC401
IC7
3.0 V
IC431
Off