Panasonic KX-TCD816UAS / KX-TCD816UAT / KX-TCA181UAS / KX-TCA181UAT Service Manual ▷ View online
+8V
+1.8V
+2.5V
+2.5V
+2.5V
+2.5V
+2.5V
+3.3V
+3.3V
C48
K0.1u(1005)
K0.1u(1005)
C192
( )
J150p
C164
(1005)
C143
D10p
C149
D10p
C194
( )
K1000p
C136
(1005)
C76
K0.01u
C138
( )
( )
NC
C162
D10p
(1005)
C195
NC
K4700p
C215
C141
C3p
C168 NC
( )
C142
D10p
C28
K0.22u
K1u
C46
(2125)
D10p
C154
(1005)
C144
D10p
C151
K4.7u
K0.056u
C47
(1608)
C159
C2p
(1005)
D10p
C156
(1005)
D10p
C158
(1005)
K0.1u
C50
C2p
C155
(1005)
C199
( )
C161
C2p
(1005)
C122
J100p
(1005)
C163
D10p
(1005)
K2.2u
C40
(2125)
C160
D10p
(1005)
K0.1u
C24
(1608)
C123
J100p
(1005)
C145
D10p
C166
(1005)
( )
NC
C165
(1005)
( )
NC
C121
(1005)
( )
NC
C150
( )
NC
C137
( )
( )
NC
C146
( )
NC
C52
( )
NC
C169
(1005)
( )
( )
( )
NC
27 1/2W
R46
(4532)
R64
1K
470
R116
(2125)
R55
1K
(1005)
R124
0
(1005)
18
R39
2.2K
R115
R125
0
(1005)
R119
270
8.2K
R43
R118
180
100K
R71
470K
R72
100K
R47
R85
3.3K
(1005)
47K
R48
R88
10K
(1005)
R86
1K
(1005)
56
R49
R87
10K
(1005)
12 1/2W
R45
(4532)
27K
R42
R84
100
R117
1K
(1005)
R121
( )
( )
NC
R120
( )
( )
NC
R130
(1005)
NC
R59
( )
NC
R58
( )
NC
R126
(1005)
( )
NC
L4
0
L3
50V10u
C49
C109
K1u
(2125)
Q8
16V10u
C5
30V
D4
Q2
Q6
DA
1
RE1
1
2
3
J22p
C153
D7p
C157
( )
( )
D10
ANT_2
ANT_1
ANT
A_2
A_1
C201
D10p
CLK
J101
J104
TP23
J103
J102
TP9
TP10
VDD1
Q3
( )
D18
NC
D5
RE1
D13
SW1
C130
( )
( )
C214
( )
R127
100
(1005)
C217
( )
( )
NC
C183
D10p
R135
10K
R132
10K
(1005)
1 GND1
2 ANT2
3 VCCPA
4 GND2
5 GND3
6 VCC_OC
7 GND4
8 RSSI
9 SYRI
2 ANT2
3 VCCPA
4 GND2
5 GND3
6 VCC_OC
7 GND4
8 RSSI
9 SYRI
10 GND5
11
GND6
12
SYEN
13
SYD
A
14
SYCL
15
GND7
16
RX_D
A
TA
17
GND8
18
TXDA
19
GND9
20
RESET
21
ANT1
22
GND10
23
GND11
24
GND12
25
GND13
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
A_1
32
GND19
K1u
C135
(2125)
C140
C2p
D10p
C57
C134
D10p
L10
L11
D10p
C265
( )
NC
C266
NC
1
RDY/BUSY
2
RESET
3
WP
4
NC4
5
NC5
6
NC6
7
VCC
8
GND
9
NC9
10
NC10
11
NC11
12
NC12
13
CS
14
SCK
15
SI
16
SO
17
NC17
18
NC18
19
NC19
20
NC20
21
NC21
22
NC22
23
NC23
24
NC24
25
NC25
26
NC26
27
NC27
28
NC28
29
NC29
30
NC30
31
NC31
32
NC32
L12
( )
L13
NC
R134
1K
(1005)
K0.01u
C41
(1608)
R51
0
R50
D10p
C196
NC
NC
C310
D10p
C316
( )
R133
(1005)
NC
C147
Z0.1u
D10p
C317
C197
C3p
470
R52
820
R54
( )
C108
NC
(2125)
2.2K
R44
D20
15
R161
TDO
RFCLK
LE
RSSI
RESET
RDI
SK
SIO
RESET
RDY
IC2
RF
Module
IC5
KX-TCD816 SCHEMATIC DIAGRAM (Base Unit)
NC: No Components
(1)
(2)
(3)
(5)
(4)
(6)
(7)
(8)
(9)
(10)
(11)
(11)
(12)
(13)
2.5Vp-p
0V
10.368MHz
Loop Current
TX_AF
RX_AF
RX DATA
TX DATA
3.3V
89
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
34 SCHEMATIC DIAGRAM (HANDSET)
AG
+3.3V
+1.8V
+4.0V
+4.0V
+3.3V
+1.8V
+1.8V
+3.3V
+3.3V
C16 K0.1u
C56
D10p
C7
D10p
C38
K470p
D10p
C14
C6
( )
NC
K0.1u
C20
C4
D10p
K0.1u
C21
K0.1u
C24
D10p
C92
C3
K0.1u
C76
(
)
NC
C12
K1u
C78
(
)
NC
J100p
C93
C79
(
)
NC
J100p
C94
C95
(2125)
(
)
NC
C13
K0.1u
D10p
C77
C18
K1000p
D10p
C75
C109
K0.1u
R9
5.6K
R37
33
R38
33
R21
1K
R20
1K
R72
1K
R25
330
R4
15K
R29
2.2K
R60
1K
10
R80
R61
10K
R5
470
R35
27K
R57
68
R6
10K
R7
220K
L4
L5
D1
C40
6.3V10u
C57
6.3V330u
C5
6.3V10u
Q3
Q10
F1
Q1
S
G
D
Q2
D8
IC2
1
CD
2
+VREF
3
+VIN
4
-VIN
5
VOUT1
6
V+
7
GND
8
VOUT2
D5
Q4
D7
D6
Q5
TP10
TP11
TP16
TP12
D4
+1.8V
BATTERY+
BATTERY-
CHARGE+
CHARGE-
R47
5.6K
R46
5.6K
Q18
C108 K1u
C107
K1u
R90 0
+4.0V
+3.3V
+3.3V
Q19
R153
10K
C1
4V330u
R43
0.1 1/8W
C80 K2.2u
21-25
R74
1
C86
K1u
C15
K1u
J33p
C17
R36
47K
C11
(
)
NC
C27
(
)
NC
C28 (
)
NC
( )
C127 NC
( )
C128 NC
SW1
1
2
3
4
5
6
R1
47m
K0.1u
C29
+4.0V
BAT
+3.3V
R18
100K
(
)
R93
+BAT
CN9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
10K
R95
IC1
BBIC
1
VDDIO-1
2
VSS-2
3
AD8
4
AD9
5
AD10
6
AD11
7
AD12
8
AD13
9
AD14
10
P3[7]/PD7
11
P3[1]/PD1
12
P3[5]/PD5
13
P3[4]/PD4
14
P3[3]/PD3
15
P3[2]/PD2
16
VDD-16
17
VSS-17
18
RFCLK
19
VDDRF
20
VSSRF
21
XTAL1
22
CAP
23
AVS
24
AVD
25
RSSI
26
RDI
27
CMPREF
28
TDO
29
AD15
30
AD16
31
AD17
32
AD18
33
AD19
34
AD20
35
AD21
36
AD22
37
AD23
38
LE
39 SO
40 SK
41 DAC/ADC2
42 P3[6]/PD6
43 RDN
44 WRN
45 MI/READY
46 SCLK
47 UTX/P0[0]
48 URX/P0[1]
49 JTIO/P0[2]
50 PCM_FSC1/P0[3]
51 PCM_FSC0/P0[4]
52 PCM_CLK/P0[5]
53 PCM_DOUT/P0[6]
54 PCM_DIN/P0[7]
55 VDDIO-55
56 VSS-56
57 DREQ0n/INT0n/P1[0]
58 DACK0n/INT1n/P1[1]
59 ACS1/DREQ1n/INT2n/P1[2]
60 ACS0
61 ACS2/DACK1n/INT3n/P1[3]
62 HOLDn/INT4n/P1[4]
63 VDDE/HOLDACKn/INT5n/P1[5]
64 BE1n
40 SK
41 DAC/ADC2
42 P3[6]/PD6
43 RDN
44 WRN
45 MI/READY
46 SCLK
47 UTX/P0[0]
48 URX/P0[1]
49 JTIO/P0[2]
50 PCM_FSC1/P0[3]
51 PCM_FSC0/P0[4]
52 PCM_CLK/P0[5]
53 PCM_DOUT/P0[6]
54 PCM_DIN/P0[7]
55 VDDIO-55
56 VSS-56
57 DREQ0n/INT0n/P1[0]
58 DACK0n/INT1n/P1[1]
59 ACS1/DREQ1n/INT2n/P1[2]
60 ACS0
61 ACS2/DACK1n/INT3n/P1[3]
62 HOLDn/INT4n/P1[4]
63 VDDE/HOLDACKn/INT5n/P1[5]
64 BE1n
65
BE0n
66
SCL2/P3[0]
67
SDA2
68
DAB0
69
DAB8
70
DAB1
71
DAB9
72
DAB2
73
DAB10
74
DAB3
75
DAB11
76
VSS-76
77
VDD-77
78
VDDIO-78
79
P2[0]/PWM0/SPIDI
80
P2[1]/PWM1/SPICLK
81
P2[2]/ADC0/CLK100
82
P2[3]/ADC1
83
P2[4]/SCL1
84
P2[5]/SDA1
85
DAB4
86
DAB12
87
DAB5
88
DAB13
89
DAB6
90
DAB14
91
DAB7
92
DAB15
93
P2[7]/DC_CTRL/SPIDO
94
DC_I
95
P1[6]/PON/INT6n
96
P1[7]/CHARGE/INT7n
97
P2[6]/stop_charge
98
VBAT3/RINGING
99
DC_stab
10
0
100: DC_Sense
10
1
101: AVS_sense
102
102: ADC3
103
LDO1_Sense
104
LDO1_CTRL
105
LDO2_CTRL
106
VBAT2
107
VBAT1
108
AVS2
109
AVD2
110
LSR+/REF
111
LSR-/REF
112
LSR_HS/CIDIN-
113
VREF_HS/CIDOUT
114
MIC-
115
VREF-
116
VBUF
117
AGND
118
MIC+
119
VREF+/CIDIN+
120
RSTn
121
AD0
122
AD1
123
AD2
124
AD3
125
AD4
126
AD5
127
AD6
128
AD7
D9
D10
D11
D10p
C60
K1000p
C35
D10p
C90
D10p
C89
D10p
C91
R26
100
10K
R50
100K
R71
C8
K0.22u
D10p
C87
J47u
C36
IC21
1
GND
2
NC
3
VCC
4
AGND
5
SD
6
RXD
7
TXD
8
VLED
R15
27
IC3
1
1A
2
1B
3
2Y
4
GND
5
2A
6
2B
7
1Y
8
VCC
R81
1K
C67
J100p
C66
J22p
C65
J22p
C64
J22p
R12
39K
C58
K1u
R82
1K
R83
1K
100
R58
0
R62
( )
C72
+3.3V1
( )
C130
+3.3V1
+3.3V1
( )
C132
(
)
C133
NC
R201 0
R202
0
39
R56
39
R55
L6
22nH
K0.1u
C10
K0.1u
C19
C22
K0.1u
K0.1u
C23
K0.1u
C34
C61
K0.1u
5.6
R8
1000
RA2
1
2
3
4
5
6
7
8
1000
RA1
1
2
3
4
5
6
7
8
K0.068u
C37
K0.068u
C68
TP18
TP17
UTX
URX
GND
JTAG
22nH
L7
C136
K0.1u
(
)
R59
NC
C129D5p
D5p
C135
0
R65
K1u
C39
R64
10K
R63
10K
L1
MIC
1
HSMIC(+)
2
HSMIC(-)
R10
F39K
R11
F15K
R41
27K
R40
27K
R39
27K
R19 3.3M
100
R179
(
)
R79
NC
LED8
X1
10.368MHz
R3
F150K
R2
F56K
R152
K270K
D14
SP_TEST1
SP_TEST2
D15
Q9
R17
560
REV_TEST2
REV_TEST1
TP19
TP20
TDO
P3[6]
P3[4]
SK
SIO
P3[6]
WR
MI/READY
COL4
COL3
COL2
COL3
COL2
COL0
CE_FLASH
ACS2
UB
LE
A20 A19 A18 A17 A16 A15
RDI
RSSI
RFCLK
A11 A10 A9 A8
LB
DQ0
A7
A6
A5
A4
A3
A2
A1
A22
COL5
COL6
COL7
COL3
COL4
A12
A13
A14
ROW0
P3[4]
RD
COL1
CE_SRAM
DQ8 DQ1 DQ9 DQ2 DQ10 DQ3 DQ11
COL7
DQ4 DQ12 DQ5 DQ13 DQ6 DQ14 DQ7 DQ15
ROW0
COL5
COL6
COL7
COL0
COL2
COL4
COL3
COL1
1ROW2
1ROW1
1ROW0
ROW2
ROW1
COL5 COL6
PUSH
kEY_BL
Key-BL
SEIWA
LED
22uH
NC : No Components
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(19)
(20)
(21)
(22)
(22)
(23)
(24)
(25)
(25)
(26)
(27)
(27)
(28)
(29)
(30)
(3)
(4)
(4)
(2)
(1)
TALK (Back light OFF) : 3.65V
SP-Phone
ON: 3.3V
OFF: 0V
ON: 3.3V
OFF: 0V
.SP-Phone
RX_AF
.Beep/Ringer
RX_AF
.Beep/Ringer
TX_AF
1.5V DC Suply
to MIC
to MIC
115kHz (TALK mode)
25mV p-p
0V
0.7V
When on charge
1sec
USB
Use: 0V
No-use: 3.3V
Use: 0V
No-use: 3.3V
90
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
+3.3V
+3.3V
+3.3V
+3.3V
+4.0V
+3.3V
+3.3V
+3.3V
+4.0V
+3.3V
C115
K4.7u
C122
K0.01u
C119
K4.7u
C85
(
)
NC
C9
K0.068u
C84
(
)
NC
C124
K0.1u
C123
K0.1u
C118
K1u
C102
K1u
Z10u
C42
C111
K1u
C121
(
)
NC
C116
(
)
NC
R117
1K
R75
0
R24
470K
R99
1.5K
CN4
1
2
3
4
5
Q16
CLK
A201
(
)
C114
NC
(
)
C120
NC
(
)
R122
NC
C44
D10p
R128
390
C46
D10p
C54
D10p
C48
D10p
C50
D10p
C51
D10p
C47
C2p
C55
C2p
C49
C2p
(
)
C126
NC
C53
J150p
C117
J22p
C83
K1000p
R100
100K
R101
100K
R102
100K
R114
100K
R77
0
R98
1M
R118
47
R119
47
R120
47
C30
K1u
C45
K1000p
R73 470K
+2.5VRF
C52
K0.1u
C70
K0.1u
R92
10K
+3.3V
Q7
R23
1K
R16
10K
CN5
1
2
3 LED1_A
4 LED2_A
5 LED3_A
6 RD
7 WR
8 D/C
9 RES
10 CS
11 VSS
12 VDD
13 DQ15
14 DQ14
15 DQ13
16 DQ12
17 DQ11
18 DQ10
19 DQ9
20 DQ8
21 DQ7
22 DQ6
23 DQ5
24 DQ4
25 DQ3
26 DQ2
27 DQ1
28 DQ0
29 NC
30 NC
+BAT
R28
2.2K
Q6
L2
(
)
NC
IC20
RF Module
1 GND1
2 ANT2
3 VCCPA
4 GND2
5 GND3
6 VCC_OC
7 GND4
8 RSSI
9 SYRI
2 ANT2
3 VCCPA
4 GND2
5 GND3
6 VCC_OC
7 GND4
8 RSSI
9 SYRI
10 GND5
11
GND6
12
SYEN
13
SYDA
14
SYCL
15
GND7
16
RX_DATA
17
GND8
18
TXDA
19
GND9
20
RESET
21
ANT1
22
GND10
23
GND11
24
GND12
25
GND13
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
A_1
32
GND19
R124
10K
R130
10K
R126
10K
Q11
R34
100K
+3.3V
68K
R45
+1.8V
Q12
R49
100K
+3.3V
10K
R42
+3.3V
100K
R151
D10p
C43
D10p
C41
(
)
Q13
NC
C3p
C125
(
)
R51
NC
( )
R52
NC
R150
2.2K
IC11
FLASH
1
A15
2
A14
3
A13
4
A12
5
A11
6
A10
7
A9
8
A8
9
A19
10
NC
11
WE
12
RESET
13
NC
14
WP/ACC
15
RY/BY
16
A18
17
A17
18
A7
19
A6
20
A5
21
A4
22
A3
23
A2
24
A1
25
A0
26
CE
27
VSS
28
OE
29
DQ0
30
DQ8
31
DQ1
32
DQ9
33
DQ2
34
DQ10
35
DQ3
36
DQ11
37
VCC
38
DQ4
39
DQ12
40
DQ5
41
DQ13
42
DQ6
43
DQ14
44
DQ7
45
DQ15/A-1
46
VSS
47
BYTE
48
A16
(
)
R30
NC
R48
0
R123
3.3K
R129
3.3K
R125
3.3K
IC15
1
D+
2
D-
3
VDD3
4
TEST1
5
GND5
6
XIN
7
XOUT
8
CS
9
RD
10
WR
11
RESET
12
INTR
13
D15
14
D14
15
D13
16
D12
17
TEST2
18
DACK1
19
D11
20
D10
21
D9
22
D8
23 ALE/PUCTL
24 ADSEL
25 DREQ1
26 A6
27 A5
28 A4
29 A3
30 A2
31 A1
32 A0
33 DACK0
24 ADSEL
25 DREQ1
26 A6
27 A5
28 A4
29 A3
30 A2
31 A1
32 A0
33 DACK0
34
DREQ0
35
AD7
36
AD6
37
AD5
38
AD4
39
GND39
40
VDD40
41
AD3
42
AD2
43
AD1
44
AD0
R91
22K
IC8
1
1A
2
1B
3
2Y
4
GND
5
2A
6
2B
7
1Y
8
VCC
K1u
C63
27
R32
27
R31
R154
100
R155
100
R156
100
R157
100
R158
100
R159
100
R160
100
R161
100
R162
100
R163
100
R164
100
R165
100
R166
100
R167
100
R168
100
R169
100
R170
100
R171
100
R172
100
R173
100
R76
1K
(
)
C62
NC
IC19
1
NC
2
3
GND
4
5
VCC
Q8
R13
100K
R14
2.2K
(
)
C81
(
)
C82
Q20
R27
100K
+3.3V1
K0.1u
C131
R33
1M
C25
K0.01u
IC18
1
VOUT
2
VIN
3
NC3
4
VOUT_SENSE
5
GND
6
BYPASS
7
VEN
8
NC8
C26
K0.1u
K0.1u
C69
K1000p
C150
K1000p
C31
J27p
C32
IC13
SRAM
1
A4
2
A3
3
A2
4
A1
5
A0
6
CE
7
DQ0
8
DQ1
9
DQ2
10
DQ3
11
VCC
12
GND
13
DQ4
14
DQ5
15
DQ6
16
DQ7
17
WE
18
A15
19
A14
20
A13
21
A12
22
NC
23
NC
24
A11
25
A10
26
A9
27
A8
28
NC
29
DQ8
30
DQ9
31
DQ10
32
DQ11
33
VCC
34
GND
35
DQ12
36
DQ13
37
DQ14
38
DQ15
39
LB
40
UB
41
OE
42
A7
43
A6
44
A5
(
)
C151
82K
R44
R121
0
R127
120
(
)
R181
NC
(
)
R182
NC
(
)
R183
NC
(
)
R184
NC
(
)
R185
NC
(
)
R186
NC
(
)
R187
NC
(
)
R188
NC
(
)
R190
NC
(
)
R191
NC
(
)
R192
NC
(
)
R193
NC
(
)
R194
NC
(
)
R195
NC
(
)
R196
NC
(
)
R197
NC
(
)
R198
NC
(
)
R199
NC
(
)
R200
NC
(
)
R189
NC
C134
K0.1u
CN8
1 Vbus
2
3
4
5 GND
(
)
R180
NC
( )
R53 NC
(
)
R54
NC
+3.3V1
D13
5.1V
D12
5.1V
220
R78
K1000p
C152
2.2
R203
X2
(
)
C88
J100p
C59
R97
27
R96
27
330
R174
R22
27K
K270p
C33
330K
R66
C106
K1u
R204
0
A11
A10
A9
A20
A19
A18
A8
A7
A6
A5
A4
A3
A5
A4
A3
A2
A1
A6
A7
A8
A9
A10
A11
A12
WR
WR
WR
A1
A2
A3
A4
A5
A6
A12
A13
A14
A15
A16
A16
A15
A14
A13
DQ14
DQ7
DQ15
DQ9
DQ1
DQ8
DQ1
DQ8
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ15
DQ14
DQ13
DQ12
LB
A7
RD
RD
RD
A1
A17
DQ11
DQ10
DQ8
DQ9
UB
DQ0
MI/READY
SIO
A2
LE
RDI
SK
DQ6
DQ13
DQ5
DQ12
DQ4
DQ11
DQ3
DQ10
DQ2
RFCLK
RSSI
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ9
DQ10
DQ11
DQ12
DQ14
DQ15
DQ8
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ13
A22
ACS2
DQ8
DQ9
WR
RD
DQ15
DQ14
DQ13
DQ12
DQ11
DQ10
CE_SRAM
CE_FLASH
TDO
HEADSET JACK
LED_K
ID
KX-TCA181 SCHEMATIC DIAGRAM (Handset)
NC : No Components
D+
D-
NC
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(19)
(20)
(21)
(22)
(22)
(23)
(24)
(25)
(25)
(26)
(27)
(27)
(28)
(29)
(30)
(3)
(4)
(4)
(2)
(1)
TX DATA
RX DATE
3.3V
0V
10.368MHz
2.5V
RX_AF
1.7V
0V
6MHz
(Use USB)
3.3V p-p
91
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
35 SCHEMATIC DIAGRAM (HANDSET_OPERATION)
+3.0V
LED4
LED5
LED6
LED7
S1
POWER
R
SOFT_C
SP
INT
CLEAR
SOFT_A
TALK
3
2
1
9
8
7
#
0
*
4
6
5
CN10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2ROW0
2COL2
2COL1
2COL0
2COL6
2COL4
2COL3
2ROW2
2ROW0
2ROW2
2COL7
2ROW1
2COL7
2COL1
2COL2
2COL4
2COL3
2COL0
2COL5
2ROW1
2COL6
2COL5
2COL5
KX-TCD181 SCHEMATIC DIAGRAM (Handset_Operation)
92
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
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