Panasonic KX-T7735UA / KX-T7735UA-B (serv.man3) Service Manual / Supplement ▷ View online
17
KX-T7735UA/KX-T7735UA-B
1.9.
IC DATA
Change from the Original Service Manual Section 10.
Pin No.
Port
I/O Function
I/O Setting
Description
1
P3_0
I/O
O
open
2
Vref
I
-
DTMF Standard Power
3
MODE
I
-
MODE
4
P4_3
I/O
O
HS_MUTE
5
P4_4
I/O
O
SP_RX_MUTE
6
/RESET
I
-
RESET OUT
7
XOUT
I/O
O
20MHz
8
VSS
I
-
GND
9
XIN
I/O
-
20MHz
10
VCC
I
-
Vcc_3.3V
11
P5_4
I/O
O
SP_TX_MUTE
12
P5_3
I/O
O
HF Relay
13
P5_2
I/O
O
HS-POWER
14
P5_1
I/O
O
SP-POWER
15
P5_0
I/O
I
Hold Key
16
P3_7
I/O
O
D_OUT
17
P3_5
I/O
I
Model1
18
P3_4
I/O
I
Model2
19
P3_3
I/O
I
DI_INT
20
P2_7
I/O
I
KEY-IN0
21
P2_6
I/O
I
KEY-IN1
22
P2_5
I/O
I
KEY-IN2
23
P2_4
I/O
I
KEY-IN3
24
P2_3
I/O
I
KEY-IN4
25
P2_2
I/O
I
KEY-IN5
26
P2_1
I/O
I
KEY-IN6
27
P2_0
I/O
I
Hook-SW
28
P3_6
I/O
O
KEY/LED-COM0
29
P3_1
I/O
O
KEY/LED-COM1
30
P8_6
I/O
O
KEY/LED-COM2
31
P8_5
I/O
O
KEY/LED-COM3
32
P8_4
I/O
O
KEY-COM4/RS
33
P8_3
I/O
O
LCD_Contrast1
34
P8_2
I/O
O
LCD_Contrast0
35
P8_1
I/O
O
KEY-COM5
36
P8_0
I/O
I
Ring vol off
37
P6_7
I/O
O( I )
LCD_STB
38
P6_6
O
O
LCD_DO
39
P6_5
I/O
O
LCD_CLK
40
P4_5
I/O
O
LED0
41
P1_7
I/O
O
LED1
42
P1_6
I/O
O
LED2
43
P1_5
I/O
O
LED3
18
KX-T7735UA/KX-T7735UA-B
44
P1_4
I/O
O
LED4
45
P1_3
I/O
O
LED5
46
P1_2
I/O
O
LED6
47
P1_1
I/O
O
LED7
48
P1_0
I/O
O
RESET_OUT
49
P0_7
I/O
I
DTMF Column
50
P0_6
I/O
I
DTMF Row
51
P0_5
I/O
O
open
52
P0_4
I/O
O
Tone cont 1
53
P0_3
I/O
O
Tone cont 2
54
P0_2
I/O
O
Tone cont 3
55
P0_1
I/O
O
Tone cont 4
56
P0_0
I/O
O
HS/HF SP vol 1
57
P6_4
I/O
O
HS/HF SP vol 2
58
P6_3
I/O
O
HF SP vol 3
59
P6_2
I/O
O
HF SP vol 4
60
P6_1
I/O
O
KEY-IN8
61
P6_0
I/O
O
KEY-IN9
62
P5_7
I/O
O
open
63
P5_6
I/O
I
Head Set Detention
64
P3_2
I/O
I
TONE-DET
Pin No.
Port
I/O Function
I/O Setting
Description
19
KX-T7735UA/KX-T7735UA-B
1.10. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES
Change from the Original Service Manual Section 11.
20
KX-T7735UA/KX-T7735UA-B
1.11. Schematic Diagram
Change from the Original Service Manual Section 17.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(7)
(8)
(9)
(10)
(11)
(11)
(12)
(13)
(13)
(14)
(15)
(16)
(17)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
KX-T7735UA/KX-T7735UA-B: MAIN BOARD NO.1
L[3]
L[2]
L[1]
L[0]
HS_POWER
K[3]
T_CONT2
K[2]
HS_VOL1
K[6]
HS_VOL2
SP_VOL4
SP_VOL3
K[1]
T_CONT3
SP_RX_MUTE
HEAD_SET
SP_TX_MUTE
L[7]
K[4]
L[6]
L[5]
K[0]
L[4]
HS_MUTE
SP_RX_MUTE
SP_TX_MUTE
HS_POWER
SP_POWER
HS_VOL1
HS_VOL2
K[5]
T_CONT4
C[3]
C[2]
C[1]
C[0]
RING_OFF
SP_POWER
K[9]
C[5]
C[4]
K[8]
C57
10V1000
C65
0.01
C51 2.2
D33
AG
AG
AG
DG
Q108
1
2
3
4
5
AG
D34
C50 2.2
AG
+6V
C213
1000P
C60
0.022
AG
C52 10
C48
0.1
Q105
1
2
3
4
5
AG
AG
Q14
E
C
B
AG
Q8
E
C
B
C47
0.033
C27
0.1
AG
C59
0.1
IC5
11
10
12
C84
0.01
Q106
1
2
3
4
5
C66
0.01
Q13
E
C
B
C30
6.3V220
C64
0.1
AG
AG
AG
AG
AG
IC5
2
1
13
C62
0.047
AG
C46
0.047
AG
C28
2200P
C67
0.01
C44
0.047
C56
10V220
AG
C58 4.7
AG
D31
AG
C209
2200P
Q107
1
2
3
4
5
C45
0.047
C29
0.01
D32
A5V
IC5
3
4
5
C211
0.01
C42
0.1
C49
0.033
C61 0.1
IC3
1
RR
2
RTX
3
TXI
4
TXO
5
TLI
6
TLO
7
RLI
8
RLO
9
MCI
10
MCO
11
CP1
12
CP2
13
XDI
14
SKG
15
SKO
16
V+
17
AGC
18
CS
19
SKI
20
VCC
21
VB
22
GND
23
XDC
24
VLC
25
ACF
26
RXO
27
RXI
28
RRX
Q15
1
2
3
4
5
Q16
1
2
3
4
5
Q12
1
2
3
4
5
Q11
1
2
3
4
5
D3.3V
D3.3V
AG
D9
6.2V
AG
D3.3V
IC2
1
Vout
2
Vin
3
NC
4
Vss
DG
CN9
NC
1
VCC
2
MODE
3
RESET
4
VSS
D3.3V
DG
D3.3V
R144
470
R30
100K
R69 56K
R139
10
R86
220K
R44
4.7K
R80
33K
R43
470K
R55
150K
R52
100K
R71
33K
R67 220K
R70 27K
R48
2.2M
R58
100K
R49 30K
R47
5.6K
R60
1.5K
R36
150
R50 68K
R54
18K
R206
1K
R90
470
R84
330K
R87
6.8K
R31
1K
R57
2.2K
R78
47K
R59
12K
R89
68K
68K
R88
2.7K
R79
39K
39K
R37
18K
R72
33K
R61
0
R73
100K
R29
470K
R68 120K
R140
15
R45
3.3K
R208
22K
R46
5.6K
R56
3.3
R42
18K
R38
6.8K
R51 2.7M
IC8
2
1
4
SW21
8
SW46
6
SW27
9
SW15
7
SW39
0
SW40
5
SW16
1
SW43
SP-PHONE
SW22
2
SW34
4
SW45
#
SW41
REDIAL
SW28
3
SW33
*
SW25
CO2
SW12
CO11
SW35
M.W
SW38
TRANSFER
SW51
PROGRAM
SW17
CO8
SW30
FWD/DND
SW37
FLASH
SW19
CO6
SW13
CO10
SW20
CO5
SW24
CO3
SW29
CONF
SW18
CO7
SW36
PAUSE
SW26
CO1
SW44
ICM
SW11
CO12
SW32
STORE
SW31
MUTE
SW23
CO4
SW14
CO9
SW48
SW47
SW49
SW50
Q7
1
6
2
Q7
4
3
5
CN7
NC
1
2
3
4
5
CN7
6
7
2
CN8
3
6
R63
NC
R65 NC
R207
NC
C71
NC
NC
C72
C73
NC
C75
NC
C76
NC
C74
NC
R66
NC
R85
NC
C214 NC
J3 NC
J2 NC
D29
CO12
D28
CO11
D27
CO10
D26
CO9
D23
CO6
D25
CO8
D24
CO7
D22
CO5
D18
CO1
D19
CO2
D20
CO3
D21
CO4
D14
CONF
D15
FWD/DND
D17
STORE
D16
MUTE
D11
M.W
D13
SP-PHONE
D12
ICM
RA2
1.2K
1
2
3
4
5
6
7
8
Q18
Q103
1
6
2
Q103
4
3
5
Q104
1
6
2
Q104
4
3
5
C43
NC
CN4
NC
1
2
CN5
NC
1
2
CN2
NC
1
2
CN3
NC
1
2
IC4
1
CD
2
FC2
3
FC1
4
Vin
5
VO1
6
VCC
7
GND
8
VO2
JK2
1
1
2
2
3
3
4
4
B4
B3
E4
A5
A1
A3
E5
E3
G2
A4
A7
N1
A6
A9
A8
E6
N3
B1
K1
SPN
N2
B2
B7
SP+
B6
E1
G1
N4
B5
E2
A2
SW1
1
2
3
4
AG1
SP2
M2
C68
NC
M3
AG2
R153
NC
AG
AG
+6V
AG
AG
R62
NC
R64
NC
K2
R131
220
R132
56
R133
220
R135
220
R136
56
R137
220
R138
100
R134
56
R75
68K
D3.3V
AG
SP1
M1
C55 10
7
N8
N9
N10
NC
4
AG
5
CN8
8
N11
JK3
1
2
3
4
5
C31 10
C54
6.3V100
C53
6.3V47
C63
6.3V100
CN8
1
SW2
1
2
3
4
R141
220
R158
560
CN6
1
2
N7
N6
N5
CN7
8
D3.3V
SW59
F7
SW64
F12
SW63
F11
B9
SW60
F8
SW61
F9
SW62
F10
SW56
F4
SW58
F6
SW55
F3
SW57
F5
SW53
F1
SW54
F2
B8
R
G
R
G
R
G
R
G
G
G
GG
R
G
R
G
R
R
G
G
R
RR
R
2.4V
2.8V
1.5V
2.7V
1.5V
2.7V
2.8V
5.4V
5.3V
2.0V
0
0
0
0
2.8V
2.7V
2.5V
2.9V
2.8V
2.7V
2.8V
2.8V
2.8V
2.2V
1.5V
2.1V
2.1V
2.1V
0
0
0
2.8V
6.1V
6.1V
2.9V
2.8V
4.6V
5.4V :
0V :
The handset is in use
The speakerphone is in use
The speakerphone is in use
On using the speakerphone
SP-Phone
Recepton Signal
Recepton Signal
SP-Phone
Transmission Signal
Transmission Signal
Ringer
Signal
Signal
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