Panasonic KX-TG9471B

9
KX-TG9471B/KX-TG9472B/KX-TGA939T
4.2.2. Power Supply Circuit
The power is supplied to the DECT BBIC, RF Module, EEPROM, TAM Companion, OP Amp, and Charge Contact from AC
Adaptor (+6.5 V) as shown in Fig.101. The power supply is as follows;
• DECT BBIC (IC501):
CN301 (+6.5 V) → F301 → IC341 → IC326 → Q386 → IC501
CN301 (+6.5 V) → F301 → IC341→ IC326 → Q381 → IC501
• RF Module (IC801):
CN301 (+6.5 V) → F301 → IC321→ IC801 (PLL) (Power AMP)
• EEPROM (IC551)/FLASH MEMORY 1 (IC761)/FLASH MEMORY 2 (IC561)/Latch (IC631/641)/OP Amp (IC171):
CN301 (+6.5 V) → F301 → IC341 → Q381 → IC761, IC561, IC171, IC631, IC641, IC551
• TAM Companion (IC701):
CN301 (+6.5 V) → F301 → IC331 → IC701
CN301 (+6.5 V) → F301 → IC341 → Q386 → IC701
CN301 (+6.5 V) → F301 → IC341 → Q381 → IC701
• OP Amp (IC161, IC261):
CN301 (+6.5 V) → F301 → Q386 → IC161/IC261
<Fig.101>
AC Adaptor
IC321
RF Module (IC801)
IC341
USB
VBUS
IC331
+5.0V
CN901
USB JACK
Isolated circuit
Photocoupler
IC902
IC903
IC904
IC905
+2.5 V
+4.0V
Q386
Q381
Q541
Reset
IC161, IC261
BBIC (IC501)
IC561
IC902
IC903
IC904
IC905
TAM IC (IC701)
CN301
+6.5 V
+3.0 V
+3.3V
+1.8 V
IC761, IC551, IC631,
IC641, IC171
F301