Panasonic KX-T7453 Service Manual page 55

R29
560
JK2
SP 3
C121
0.47
2
L8
+5V(V2)
MIC 1
0
4
HAND SET
R68
2.2K
JACK
AG
+5V(V1)
R137 +5V(V1)
R136
R129
47K
0
R116
0
SW1
Q32
1
0.6V : OFF HOOK
3
4.5V : ON HOOK
HOOK SWITCH
16
+5V(V1)
R44
18K
RESET CIRCUIT
SP
1
2
SP-PHONE
MIC
1
2
AG
Q31
AG
TONE INPUT : L
NO TONE
DPITS
GATE ARRAY
7
R113
21
SXO
68
20
SR1
19
SR0
R134 15
EP2
L6
33
18
CK2M
R141
270
32
N.C
11
42
N.C
60
N.C
13
EP0
14
10
EP1
23
OP0
24
OP1
25
OP2
26
OP3
8
36
CK16M
37
CK512K
+5V(V2)
14
13
R130
1.8K
2
22
CK2K
Q24
R144 33 11
INT[1]
INT0
R150 33 10
IOR
IOR
R151 33
9
15 IOW
IOW
R152 33
7
R[12]
A0
17
R153 33 6
R[13]
A1
R145 33 5
R[20]
D0
R146 33 4
R[21]
D1
R147 33
3
R[22]
18
D2
R148 33
2
R[23]
D3
R149 33 12
INT[2]
INT1
+5V(V1)
19
63
RESET
R45
Q25
10K
16
RESET : H 5V EP3
NORMAL : L 0V
61
SP ON : L
SP OFF : H
R42
IC3
10K
1
CD VO2
2
FC2 GND
3
FC1 VCC
R138
4
Vin VO1
100K
R57
120K
+5V(V2)
C40
680P
C32
6.3V22µ
JP15
C43
AG
0
0.047
+5V(V2)
IC8
AG
TONE DETECTION CIRCUIT
: H
+5V(V2)
R85
R84 10K
Q23 IC8
2
10K
1
3
D12
R86
10K
AG
C3
1
50V1µ
IC1
R1 Q1
R4
40 4.7K
33 Ω
TXA
R2
+5V(V1)
4.7K
C4
68P
C6
68P
R3
4.7K
41 R6
TXB R7
33 Ω
4.7K
Q2
+5V(V1)
50V1µ
C80
IC11
9
38
7
RXA 4.7K
10
8
R10
+5V(V1)
IC11
4
39
12
RXB
5
3
+5V(V1)
1
VDD
31
2
VDD
49
VDD
27
IP0
28
0.63V
IP1
29
IP2 VREF
30
IP3
17
GND
35
GND
64
GND
8
CSN
R27
C18
34 1K
OSO
8P
R28 X1
1M 16.384M
33
OSI
C19
47P
+5V(V2)
C15
6.3V1000µ
Q3
50
R0
Q4
51
4 R1
Q5
52
R2
Q6
53
R3
Q7
54
R4
Q8
55
R5
Q9
56
R6
Q10
57
R7
58
R8
59
R9
5
L12 33
43
C0
44 L13 33
C1
L14 33
45
C2
46 L15 33
C3
47 L16 33
C4
L17 33
48
C5
NI
PI
62
9
+5V(V1)
R119 CN1 CN301 SW301
0
2 2 2 JOG[2]
R120 0
1 1 1 JOG[1]
C78
C79
1000P 3 3 3 GND
1000P
C77 C76
3AP:PSUP1196ZA
JOG SWITCH
+5V(V1) COMMUNICATION
LSI
R133
IC2
10
6
A5V1
C119
0.1
3
AG1
7
A5V2
C118
0.1
9
AG2
46
A5V3
C117
+5V(V2)
0.1 50
AG3
8
C84
51
-FSYNC
A5V4
6.3V22
C27
7
0.1
58
AG4
6
2
VREFDA
AG
5
C120
6.3V47µ
5
HO-
AG2
4
HO+
60
APMN
1
APNP
R32
C122
91K 59
150P APNO
C31
47
H1
AG
JP14
0.33
8
SPO
0
55
AP1MN
R35 8.2K
56
AP1MP
C108 R39
54
470P 220K AP1MO
49
-WR/STB
M1
C33
52 -RD/SDO 35
0.1
AP2MO
53 D7/SFT 36
AP2MI
57 D6/SD1 37
VREFM
2.5V
D5/WBR
48
D4/OPC
AG4 VBB
D3/OPB
D2/OPA
AG3
21
D1/OP9
OP7
20
D0/OP8
OP6
19
OP5
18
C72
C71
OP4
17
0.047 0.047 +5V(V2)
OP3
16
OP2
R88 33K
14
6
OP1
7
13 RESET
5
OP0
IC8
-CE/-DOE
C73
25V4.7µ
R87
100K AG
T1
4
10
50V2.2 µ
D1 12V
5 9
C2
1 7
2 6
VREF
IC9
IN
OUT
+5V(V1) 3 1
2
IC10
IN
OUT
+5V(V2) 3 1
2
4.7K
R13
REGULATOR SECTION
+5V(V1) +5V(V2)
AG
D100 D101 D102
G G G
R R R
CO19 CO20 CO21
D106 D107 D108
G G G
R R R
CO13 CO14 CO15
D112 D113 D114
G G G
R R R
CO7 CO8 CO9
D118 D119 D120
G G G
R R R
Q11
CO1 CO2 CO3
CONF FWD
SP
Q12
D124 D125 D126
ICM
D130
Q13
Q14
Q15
Q16
+5V(V1)
11
6
IC11
-5V
+5V(V2)
14
7
IC12
1AP:PSUP1177Z
+5V(V1)
15
D5V1
C22
6
0.1
12
DG1
31
D5V2
C21
0.1
28
DG2
P/-S 10
37
45
TEST
DG
24
C116
22
RXD
R135
23
TXD
33
25
BCLK
26
HCLK
C25
47P
OSC1 29
C26
30
OSC2
R43 8P
33
1K
33
D[11]
ALE
34
44
R[1]
-INT
35
34 R[3]
D[12]
36
D[10]
D[9]
38
R[2]
39
40
41
42
43
11
D[5]
32
3
JK1
L1
4 H
1 L
L4
3 T
2 R
L2
CN5
JP1
1 G
JP2
2 R
JP3 0
3 B
JP4
4 W
JP16
0
XDP JACK
+5V(V1)
IC7
1 8
2 7
3 6
4 5
-5V
LED
D103 D104 D105
G G G
R R R
CO22 CO23 CO24
D109 D110 D111
G G G
R R R
CO16 CO17 CO18
D115 D116 D117
G G G
R R R
CO10 CO11 CO12
D121 D122 D123
G G G
R R R
CO4 CO5 CO6
MUTE AUTO MW
D127 D128 D129
Q17
Q18
+5V(V2)
SP-PHONE RECEPTION
SP-PHONE TRANSMISSION
HANDSET RECEPTION
HANDSET TRANSMISSION
PBX