Panasonic KX-T7735UA / KX-T7735UA-B (serv.man3) Service Manual / Supplement ▷ View online
21
KX-T7735UA/KX-T7735UA-B
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KX-T7735UA/KX-T7735UA-B: MAIN BOARD NO.2
HS_MUTE
DI_INT
T_CONT1
DOUT
K[0]
K[1]
K[2]
K[3]
K[4]
K[5]
K[6]
C[0]
C[1]
C[2]
C[3]
C[5]
RING_OFF
HEAD_SET
L[7]
L[6]
L[5]
L[4]
L[3]
L[2]
L[1]
L[0]
T_CONT1
T_CONT2
T_CONT3
T_CONT4
HS_VOL1
HS_VOL2
SP_VOL3
SP_VOL4
C[4]
K[7]
DI_INT
DOUT
K[9]
K[8]
C7
820P
D5
C8
0.22
C14
0.047
Q102
E
C
B
AG
J1
C96
0.01
DG
C34
0.1
C212
1000P
C101
50V 0.01
50V 0.01
Q2
C23
0.015
C4
2.2
D5V
AG
C91
0.1
D4
+6V
AG
Q5
E
C
B
AG
C95
0.1
C92
1
A5V
C204
0.1
AG
Q1
C24
0.1
AG
AG
DG
IC5
8
9
6
AG
DG
AG
IC6
3
2
1
AG
C85
0.01
0.01
C94
1200P
C6
1000P
C9
10V220
AG
C81
0.1
C93
0.047
AG
Q10
E
C
B
DG
J4
JK1
1
H
2
T
3
R
4
L
D5V
C103
2.2
C208
1000P
C21
0.1
C110
0.1
DG
C12
0.015
A5V
Q6
E
C
B
IC6
5
6
7
Q4
+6V
AG
A5V
AG
D3
DG
C22
0.01
AG
Q3
E
C
B
X1
20MHz
1
2
3
DG
C106
0.01
D3.3V
C107
0.1
D3.3V
D3.3V
D3.3V
D3.3V
D7
Q101
E
C
B
D3.3V
D3.3V
DG
DG
D3.3V
C108
0.1
DG
DG
D10
DG
C116
2.2
D3.3V
C113
2.2
C114
2.2
C115
2.2
C112
2.2
Q9
E
C
B
C132
1
AG
AG
AG
AG
AG
C26
0.1
IC10
3
2
1
AG
C33
0.015
AG
IC10
5
6
7
AG
C35
1
C131
0.1
C32
0.1
DG
R289
100K
R27
5.6K
R91
10K
R103
2.7K
R98
15K
15K
R28
3.3K
R108
1K
R106
1K
R5
47
R2
22K
R39
33K
R128
1.2K
R102
220
R82
1.5K
R15
6.8K
R81
10K
10K
R99
10K
R96
100K
R125
47K
R8
33
33
R94
5.6K
R105
68
R233
39K
R101
220
R124
0
R127
56K
R41
4.7K
R237
470
R14
18
R21
2.7K
R22
3.3K
R3
4.7K
R16
56
R1
100K
R107
4.7K
R26
4.7K
R97
10K
R231
10K
R234
30K
R17
0
R34
3.3K
R25
470K
R129
10K
R32
39K
R10
2.7K
R7
27K
R238
270K
R92
18K
R74
5.6K
R77
8.2K
R126
33K
R100
68K
R40
33K
R236
5.1K
R95
470K
R4
68K
R6
680
R76
120K
R9 20K
R24
270K
R201
2.2K
R93
10K
R23
120
R123
2.2k
AG
D3.3V
C86
0.01
C117 0.01
D3.3V
R156
15K
SW42
HOLD
C207
NC
R19
NC
R20
NC
R154
NC
D6
IC11
1
VIN
2
VSS
3
CE
4
NC
5
VOUT
IC10
8
4
IC5
14
7
IC8
5
3
Q20
T2
1
2
4
5
6
7
9
10
IC7
1
VCC
2
GND
3 OUT
IC6
8
4
C13
NC
PC1
1
2
3
4
T1
6
1
2
3
2
3
4
R
AG
L
H
V1
DG
AG
D1
1
2
3
4
D2
1
2
3
4
R121
NC
C36
0.1
C5
NC
T
SW52
HOOK
AG
B10
C82
NC
AG
D3.3V
IC9
2
4
DG
D3.3V
IC9
5
3
1
Q109
1
2
3
4
5
DG
C41
0.1
1 Vss
2 ResetB
3 V0
4 V1
5 V2
6 V3
7 V4
8 Vss
9 Vdd
CN1
10 DB6(SIC)
11 DB7(SI)
12 CSB
13 RS
14 Vss
R104 NC
C205
10V1000
C206
10V220
C215
6.3V220
C10
NC
AG
+6V
D5V
D3.3V
C210
0.01
DG2
R12
2.2K
R13
470K
R240
1K
R232
27K
R235 NC
C133 NC
R230 33K
C130
330P
D30
C104
0.01
IC1
1 P3_0
2 P4_2/VREF
3 MODE
4 P4_3/XCIN
5 P4_4/XCOUT
6 RESET
7 P4_7/XOUT
7 P4_7/XOUT
8 VSS/AVSS8
9 P4_6/XIN
10 VCC/AVCC10
11 P5_4
12 P5_3
13 P5_2
14 P5_1
15 P5_0
16
P3_7
17
P3_5
18
P3_4
19
P3_3/INT3
20
P2_7
21
P2_6
22
P2_6
23
P2_6
24
P2_3
25
P2_2
26
P2_1
27
P2_0
28
P3_6
29
P3_1
30
P8_6
31
P8_5
32
P8_4
33
P8_3
34
P8_2
35
P8_6
36
P8_6
37
P6_7
38
P6_6/TXD2
39
P6_5/CLK2
40
P4_5
41
P1_7
42
P1_6
43
P1_5
44
P1_4
45
P1_3
46
P1_2
47
P1_1
48
P1_0
49
P0_7/DA1
50
P0_6/DA0
51
P0_5
52
P0_4
53
P0_3
54
P0_2
55
P0_1
56
P0_0
57
P6_4
58
P6_3
59
P6_2
60
P6_1
61
P6_0
62
P5_7
63
P5_6
64
P3_2
C25
10
C2
16V10
C3
16V22
C203
25V47
R155
0
C102 NC
1.7V
1.5V
1.6V
0
0
0
0
0
0
0
5.4V
5.4V
5.4V
5.2V
5.2V
5.4V
0.8V
5.4V
5.4V
5.4V
5.4V
5.4V
0
0
0
0
0
0
5.4V
0
0
0
0
0
0
5.4V
5.4V
5.4V
5.4V
5.4V
5.4V
5.4V
13.5V
1.8V
1.8V
1.6V
5.4V
0
0
5.2V
0
4.0MHz
5.4V
5.4V
0
0
0
5.1V
0
5.4V
5.4V
6.1V
20V
Handset
Recepton Signal
Recepton Signal
22
KX-T7735UA/KX-T7735UA-B
Memo:
23
KX-T7735UA/KX-T7735UA-B
1.12. PRINTED CIRCUIT BOARD (MAIN BOARD)
1.12.1. COMPONENT VIEW
Change from the Original Service Manual Section 18.1.
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C35
C36
D3.3V
C41
C42
C43
C44
R230
C45
R231
C46
R232
C47
R233
C48
R234
C49
R235
R236
R237
R238
C50
C51
C52
C53
C203
C54
R240
C204
C55
C205
C56
C206
C57
C207
C58
C208
C59
C209
C210
C60
C61
C211
C62
C212
C63
C213
C64
C214
Q10
C65
C215
Q11
C66
Q12
C67
Q13
SP+
H
Q14
C68
Q15
Q16
L
Q18
SP1
SP2
C71
C72
R
RA2
C73
C74
T
Q20
C75
C76
A1
A2
A3 A4
A5
A6
DG2
A7
A8
C81
A9
C82
C84
C85
PC1
C86
B1 B2
SPN
B3
B4
B5
B6
AG
B7
B8
C91
B9
C92
C93
C94
C95
C96
C2
C3
C4
R289
C5
C6
C7
C8
C9
D1
Q101
D2
Q102
D3
Q103
D4
Q104
D5
Q105
D6
Q106
D7
Q107
Q108
D9
Q109
E1
E2
E3
E4
E5
E6
DG
G1
G2
JK1
JK2
JK3
B10
R100
R101
J2
R102
J3
R103
R104
R105
R106
R107
D10
R108
K1
K2
R121
R123
R124
R125
R126
R127
D30
R128
D31
R129
D32
D33
D34
R131
M1
R132
M2
R133
M3
R134
R13
R13
R137
R138
R139
C101
C102
C103
R140
C104
N1
C106
N2
C107
N3
C108
N4
N10
N11
N5 N6
N7
N8
N9
C110
IC1
IC2
C112
IC3
C113
IC4
C114
IC5
C115
IC6
C116
R153
IC7
C117
R154
IC8
R155
IC9
R156
R10
AG1
AG2
R12 R13
R14
R15
R16
R17
R19
C130
R20
C131
R21
D5V
C132
R22
C133
R23
R24
R25
Q1
R26
Q2
R27
Q3
R28
Q4
R29
Q5
Q6
Q7
Q8
Q9
R30
R31
R32
R34
R1
R36
R2
R37
R3
R38
R4
R39
R5
R6
R7
R8
R9
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R54
R55
T1
R56
T2
R57
R58
R59
R60
R61
R62
R63
R64
R65
R66
R67
R68
R69
R70
R71
R72
R73
R74
R75
V1
R76
R77
R78
R79
R80
R81
R82
R84
R85
R86
R87
R88
R89
CN1
CN2
CN3
CN4
R91
CN5
R92
CN6
R93
CN7
R94
R95
X1
CN9
R96
+6V
R97
R98
R99
C10
C12
C13
C14
R201
IC10
IC11
R206
R207
R208
1
2
14
13
1
5
8
4
4
3
1
5
1
1
28
14
15
1
8
5
4
1
7
14
6
10
32
33
48
49
64
1
17
16
PbF
PSUP1395X -C
E
PbF
PSUP1395X -B
PbF
1
5
8
1
R
W
8
R
W
R
W
W
R
1
2
6
5
PSUP1395X -A
E
E
KX-T7735UA/KX-T7735UA-B MAIN BOARD COMPONENT VIEW
24
KX-T7735UA/KX-T7735UA-B
1.12.2. BOTTOM VIEW
Change from the Original Service Manual Section 18.2.
M.K
KXT7735UAL4
KXT7735UABL4
HIGH-LOW-OFF
4
3
3
2
1
FLASH
AUTO ANS
MUTE
AUTO DIAL
STORE
TRANSFER
PAUSE
FWD/DND
CONF
INTERCOM
HOOK SW
PROGRAM
MESSAGE
CO12
CO11
CO10
CO9
CO8
CO7
CO6
CO5
CO4
CO3
CO2
CO1
7
8
9
#
6
5
4
1
2
3
SW11
D29
SW12
SW13
SW14
SW15
SW16
SW17
SW18
SW19
SW20
SW21
SW22
SW23
SW24
SW25
SW26
SW27
SW28
SW29
SW30
SW31
SW32
SW33
SW34
SW35
SW36
SW37
SW38
SW39
SW40
SW41
SW42
SW43
SW44
SW45
SW46
SW47
SW48
SW49
SW50
SW51
SW52
SW53
SW54
SW55
SW56
SW57
SW58
SW59
SW60
SW61
SW62
SW63
SW64
SW1
SW2
D11
D12
D13
D14
D15
D16
D17
R141
R144
R158
R90
CN8
REDIAL
HOLD
SP-PHONE
0
1
8
D28
D27
D26
D25
D24
D23
D22
D21
D20
D19
D18
KX-T7735UA/KX-T7735UA-B MAIN BOARD BOTTOM VIEW
