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LINE
INRUSH CURRENT
SURGE
FILTER
PROTECTION
ABSORBER
L1
NTC1
F1
3
4
LIVE
1
AC250VT4A
NTC2
1
2
NTTEURAL
3
C17
4700P
FG
2
27V
27V
15V
1
2
PC2
Q31
D4
AC DOWN
DETECTION
20V
(PRIMARY)
CONTROL IC
17V
s µ
16
440V
D15
2
D1
1
3
4
SWITCHING
MOS FET
Q1
BEA2
R5
22
R8
160
D6
R14
27V
47k
R17
47
R9
FEED BACK
3
82
4
C11
0.01
IC1
5.1V
2.0V
16 s µ
16 s µ
CN104
BEA101
C109
2
1
1kV1500P
D101
T1
1
9
BEA1
3
OVER CURRENT
DETECT RESISTOR
D5
6
D3
11
5
C7
4700P
FG
1
PC1
2
C110
4
PC2
Q101
3
Q150
7V
AC DOWN
FEED BACK
DETECTION
CIRCUIT
(SECONDARY)
OVER DISCHARGE
PROTECTION
BATTERY CHARGE/DISCHAGE CIRCUIT
SHORT CIRCUIT
PROTECTION
Q204
22V
R204
OVERCHARGE
10K
PROTECTION
Q202
D207
D209
D208
20V
Q203
R210
2W6.8
Q201
R212
2W6.8
D202
REGULATOR
L101
1
2
IC101
5
VOLTAGE
DETECTION
3
4
10V
R121
2.2k
POWER
AMP
VOLTAGE
DETECTION
12V
C302
0.1
R112
0.1
5.6k
RINGING AMP
SECTION
TO BACK UP
BATTERY
CN103
1
24VH
6V
F201
2
GND
AC125VT4A
CN101
RL201
1
ACDOWN
26V
2
26V
3
GND
BEA103
5.8V
4
5.8V
25Hz
5
GND
IC301
6
SIGNAL-IN
7
SIGNAL-OUT
25Hz
R305
10K
R304
240V
CN102
3.9K
1
R301
2
2W100
3
R306
4
2.2
BUFFER
TO BELL
IC304
TRANS
24V
25Hz
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