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SPP-N1025/N1026
5-4.
SCHEMATIC DIAGRAM – BASE MAIN Board (1/2) – •
POWER SUPPLY
J7
(12V)
LINE
100Ω
+
-
CHARGE
TERMINAL
J3
DC IN 9V
R73
47k
SW1
R72
RINGER
47k
OFF
R99
LOW
0
RI_LO
HIGH
RI_HI
R61
C29
10k
R39
0.1
1%
10k
R60
22k
R63
47k
R38
R62
8.2k
270
Q4
R40
MMBT3904
2.2k
CHARGE
Q8
DETECT
MMBT3904
Q2
MMBT3904
Q2,8
CHARGE
R52
R42
R41
330
CONTROL
30k
100k
1%
R2
0
U8
TLP627
HOOK
ON/OFF
L7
D7
10µH
U05G
D16
U05G
T2
D8
LINE
TRANSFORMER
D15
U05G
Z2
DTZ5.6
F2
L8
250mA
D14
10µH
250V
U05G
L6
10µH
-
L5
10µH
+
R132
5.1M
+5V REGULATOR
U5
R131
NJM78M05FA
L3
5.1M
10µH
IN
OUT
GND
C16
56p
Z5
DTZ27
R29
51k
EC6
EC5
C26
C24
L1
10
1000
10µH
0.1
50V
0.1
16V
•
See page 15 for Waveforms.
See page 15 for IC Block Diagram.
R127
0
R67
0
X1
X8
ROW0
ROW1
ROW2
ROW3
ROW4
ROW5
SYSTEM CONTROLLER
U7
R-DAT
TMP87CH41U
DCA
R24
47k
Q5,6
RESET SIGNAL
GENERATOR
R46
R43
100k
62k
R45
R58
47k
1M
Q6
MMBT3904
Q5
R44
C28
C32
MMBT3904
15k
0.1
47p
R4
3.6k
R7
360k
EC7
2.2
50V
Q1
MMBT3904
(1/4)
R6
R5
R15
U2(1/4)
BUFFER
68
2.2k
5.1k
AF AMP(FOR TX)
LM324
EC2
1
R14
50V
470k
R17
R11
C6
100k
750
0.1
1%
R12
3.3k
U2(2/4)
LM324
R3
390
EC3
(2/4)
R20
R16
4.7
AF AMP(FOR RX)
10k
5.1k
50V
R19
15k
C18
C19
56p
6800p
R30
100k
C57
C58
4700p
4700p
R31
2kV
2kV
47k
C13
0.22
R129
R133
220k
220k
U2(4/4)
R77
LM324
R98
R134
0
C17
220k
220k
0.1
C12
(4/4)
56p
EC4
AF AMP(FOR DTMF)
C20
4.7
R135
56p
50V
R23
5.1M
68k
R130
5.1M
C15
56p
R22
100k
R28
R21
Z3
Z4
51k
220k
DTZ5.6
DTZ5.6
16
16
PLL EN
R88
10k
C55
47p
R87
10k
RI_LO
RI_HI
DI
CLK
X5
X6
X7
COL3
COL2
COL1
COL0
R26
R48
10k
10k
U6
93C46D
CS
CS
VCC
CLK
CLK
NC1
DI
DI
NC
DO
DO
VSS
EEPROM
C40
R108
3300p
18k
R110
27k
U2(3/4)
LM324
(3/4)
AF AMP(FOR SPEAKER)
D5
BAV99L
U3
PCC318
DCB RD
MDAT
M_DAT
DCB_RD
DCA
CIDSCL
SCK
R34
DC_COMPA
CIDSDA
3k
SD_IN
VDD_D
SD_OUT
XIN
R35
CIDINT
X1
3k
INT
3.58MHz
XOUT
RESET
VSS_D
VDD_P
VSS_A
VDD_A
VREF
DTMF
IN_SE
_OUT
A1
OUT_DC
IN_P
A2
R32
IN_DCN
IN_N
220k
A3
IN_DCP
OUT
C11
56p
C23
C22
C21
0.1
0.1
0.1
FREQUENCY SHIFT
KEYING DEMODULATOR
The components identified by mark 0 or dotted
Les composants identifiés par une marque 0 sont
line with mark 0 are critical for safety.
critiques pour la sécurité. Ne les remplacer que
Replace only with part number specified.
par une pièce portant le numéro spécifié.
1
2
R25
47k
C30
0.1
3
5
(Page 17)
6
7
8
9
10
11
12
13
14
15
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