Panasonic KX-FC379CX Service Manual page 247

KX-FC379CX
(1)
RF OSC BUFFER
(2)
R807
(3)
680
R805
(4)
39K
R803 C809
RFG
(5)
1.8K C3P
(6)
(7)
(8)
(9)
10)
11)
TCKTDO TDI TMS
81 NC
82 NC
83 NC
84 NC
85 NC
86 NC
(12)
87 NC
R811
88 NC
4.7K
89 NC
90 NC
91 NC
(13)
92 UART_TX
(14)
93 UART_RX
94 NC
C512
K0.1u 95 NC
96 GND
97 VCC
98 CHG_CTR2(NC)
(15)
99 FLASH_SCK
100 INT1(FB1)
R503
NC
INT1
INT0
(16)
(17)
(18)
(19)
R228 0
BELL_TX
CHARGE
CH_CTL
R206 180
S_ENB
R207 180
CBUSY2
CBUSY1 R205 180
(20)
(21)
(22)
(23)
IC601
RF VBATT2
1 8
VOUT VIN
2 7
NC NC
3 6
GND NC
C518
4 5
Cn CONT
K470P
RFG RFG
RFG
TXO
PDN
IC501
DSP
R223
10K
R212
47
R213 100
RST
RSSI
VCCPLL
X801
13.824MHz
R801
NC
C808
VCCPLL 50
10u/6.3V
GNDPLL 49
AG
VCCR 48
RSSI 47
C802
NC
( )
VREFR 46
VCCA
TXMOD 45 C801 K0.1u
GNDR 44
C560 10u/6.3V
MIP 43
MIN 42
C502
K0.1u
VREF 41
AG
HSMIN 40
HSMIP 39
C508 NC
( )
GNDA 38
VCCA 37
LIN0 36
R508
DCIN0 35
0
LOUT0 34
VREF
LGS
HSSPOUT 33
VCCPA 32
SPN 31
R414
C501 JJ202 AG AG
NC
PG
AG R415
(
R409
(
R410
(
IC201
1 16
A/B VCC
2 15
1A G
3 14
1B 4A
4 13
1Y 4B
5 12
2A 4Y
6 11
2B 3A
7 10
2Y 3B
8 9
GND 3Y
R216
100
BUFFER for serial
transmission switching
KX-FC379CX : CORDLESS BASE BOARD SCHEMATIC DIAGRAM
246
H/S TALK RX signal
H/S TALK TX signal
5V
VCC
VCC 3.3V
VOUT
5
NC VDET
6
GND RESET
7
Cd
8
IC301
REGURETOR with
reset circuit
R224
RESET
4.7K
Q201
RFG
R127 C151
1K K0.1u
AG
AG
R123 C144
2.2K K0.1u
AG AG
AG AG
C419 C436 C417
2.2K K0.1u 0 K0.1u
NC
)
AG AG
NC
)
NC
)
AG
R220 0
R221 0
R222 100
+5V
VIN
4
3
2
NC
1
+5VD
TO DIGITAL
CN2
1
+5VD
2 +5VD
3
AG
DG
AG
4 DG
TO DIGITAL
CN1
CH_CTL
1 CH_CTL
CHARGE
2
CHARGE
CSI
3
CSI
CSO
4 CSO
CCLK
5
CCLK
CBUSY1
6 CBUSY1
CBUSY2
7
CBUSY2
8
CRESET
S_ENB
9 S_ENB
10
HSRX
11 HSTX
12
C_IN
BELL_TX
13
BELL_TX
DG
CCLK
CSI
CSO