Panasonic KX-TA308 Service Manual page 19

SURGE ABSORBER INRUSH CURRENT PROTECTION
LINE FILTER
F1 L1
LIVE
NTC1
FG
NTC2
NITTEURAL
C17
PC2
Q31
AC DOWN
DETECTION
R9
(PRIMARY)
D4
C11
IFB OVP VCC VO GND CLM CT
17V
16µs 16µs
310V
D15
SWITCHING
D1
MOS FET
Q1
BEA2
R5
R8
D6 D5
R14
R17
D3
47
PC1
CONTROL
RT SS
IC1
5.4V
1.9V
16µs
CN104
1
BEA101 C109
A
D101
T1
1 9
REGULATOR
3 11
BEA1
FG
VOLTAGE
DETECTION
A
PC1
C
C7
C110
Q150
Q101
B
AC DOWN DETECTION
(SECONDARY) FEED BACK CIRCUIT
D
B
IC101
BEA103
L101
VOLTAGE
DETECTION
IC301
+VIN VEE OUT VCC
R305
C302 R306
BUFFER
IC304
+VIN VEE OUT
R112
D
RINGING AMPLIFIER CIRCUIT
KX-TA308 POWER SUPPLY BOARD
CN101
AC
Detect
1
26V
2
3
C
GND
4
5.8V
GND
5
6
20Hz
SIGNAL-
IN
POWER
7
AMPLIFIER
SIGNAL-
OUT
R304
D
1
20Hz
2
R301
3
4
CN102
VCC
24V
20Hz
10V
240V