Panasonic KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT Service Manual ▷ View online
IC6
1
Vss
2
CLE
3
ALE
4
WE
5
WP
6
N.C
7
N.C
8
N.C
9
N.C
10
N.C
11
12
13
14
15
16
17
18
I/O0
19
I/O1
20
I/O2
21
I/O3
22
Vss
23
Vcc
24
I/O4
25
I/O5
26
I/O6
27
I/O7
28
29
30
31
32
33
34
35
N.C
36
N.C
37
N.C
38
N.C
39
N.C
40
GND
41
R/
B
42
RE
43
CE
44
Vcc
IC12
1
OE
2
D0
3
D1
4
D2
5
D3
6
D4
7
D5
8
D6
9
D7
10
GND
11
CK
12
Q7
13
Q6
14
Q5
15
Q4
16
Q3
17
Q2
18
Q1
19
Q0
20
Vcc
K1u
C68
K0.1u
C241
2.2K
R230
100u/16V
C230
MIC1
2.2K
R231
100u/16V
C232
D10P
C233
IC7
1
A15
2
A14
3
A13
4
A12
5
A11
6
A10
7
A9
8
A8
9
NC
10
NC
11
WE
12
NC
13
NC
14
NC
15
NC
16
NC
17
A17
18
A7
19
A6
20
A5
21 A4
22 A3
28
OE
29
DQ0
30
DQ8
31
DQ1
32
DQ9
33
DQ2
34
DQ10
35
DQ3
36
DQ11
37
VDD
38
DQ4
39
DQ12
40
DQ5
41
DQ13
42
DQ6
43
DQ14
44
DQ7
45
DQ15
46
VSS
47
NC
48
A16
23 A2
24 A1
24 A1
26
CE
27
VSS
25
A0
IC8
1
1A
2
1B
3
2Y
4
GND
5
2A
6
2B
7
1Y
8
VCC
Q13
C103
K0.1u
R109
10K
R108
10K
IC13
1
OE
2
D0
3
D1
4
D2
5
D3
6
D4
7
D5
8
D6
9
D7
10
GND
11
CK
12
Q7
13
Q6
14
Q5
15
Q4
16
Q3
17
Q2
18
Q1
19
Q0
20
Vcc
C240
K0.1u
C71
C2P
R92
180R
R60
22R
TP49
C85
N.M.
L1
4.7u
C100
D10P
TP48
C86
N.M.
TP42
R91
180R
TP46
C83
N.M.
C62
1N8
TP40
TP44
ANT1
1
C104
C6P
DA1
1
3
2
C58
D10P
TP39
C59
C2P
C64
C6P
TP50
C57
D10P
TP47
R61
22R
R59
10K
C82 C2P
TP45
TP43
C105
D10P
R261
12K
R259
12K
R262
12K
R260
12K
R263
12K
R86
10K
R87
10K
R88
10K
R84
1K
R55
1K
D10P
C266
33R
R264
33R
R265
2.2K
R266
D10P
C267
+3.2V
+3.2V
+3.2V
C271
220u/10V
K0.1u
C66
K0.1u
C67
D10P
C231
TP109
SP-
1
TP104
JTIO
1
TP105
URX
1
TP106
UTX
1
TP107
GND
1
R64
1K
C63
J33P
RFM1
5
RSSI
6
VCC_OC
7
GND
8
SYCL
9
SYDA
10
SYEN
11
GND
12 RXDSG
13 SYRI
14
15
16
17
13 SYRI
14
15
16
17
18
GND
19
GND
20
RXDA
21
GND
22
GND
23
GND
24
PSEL
25
PAON
26
GND
27
VCC_PA
28
GND
29
GND
30
GND
31
GND
32
GND
33
RF1
34
GND
GND
1
GND
2
GND
3
TXDA
4
+4.0AV
+4.0AV
L3
N.M.
+3.2A
TP60
TP61
D200
D201
D202
D203
D204
D205
TP41
C84
C2P
+3.2V
+3.2V
+3.2V
R112
22R
330R
R276
TP110
D7
4.7V
D9
4.7V
D8
4.7V
D215
4.7V
330R
R279
2R2
R280
+3.2V
+3.2V +3.2A
2R2
R278
K1u
C276
+3.2A
D217
N.M.
C277
N.M. C278
N.M. C279
N.M.
C55
D
10P
R113
22K
C72
J820P
TP100
1
TP103
1
TP102
1
TP101
1
C73
K4.7u
IC10
1
CD
2
+Vref
3
+Vin
4
-Vin
5
Vout1
6
V+
7
GND
8
Vout2
Z1u
C283
N.M.
R222
100R
R221
120K
R220
39K
R223
C226
D10P
K0.1u
C225
D11
TP108
SP+
1
C220
D10P
C221
K0.1u
C224
J22P
D10P
C274
D10P
C275
CN10
HANDSETJACK
1 SP+(GREEN)
2 SP-(YELLOW)
3 MIC+(BLACK)
4 MIC-(RED)
0
R281
+3.2V
K820P
C287
K820P
C288
K820P
C289
K820P
C290
33R
R282
K820P
C291
K820P
C292
K820P
C293
1K
R283
1K
R284
K0.1u
C295
K0.1u
C296
C297
K0.1u
10K
R285
C301
J100P
22R
R289
C298
D10P
C300
K680P
IC15
1
+IN
2
V-
3
-IN
4
OUT
5
V+
10K
R286
10u/6.3V
C299
18K
R290
D216
4.7V
100K
R288
100K
R287
22K
R291
J100P
C303
K0.1u
C305
+3.2A
N.M.
R293
0
R292
Z1u
C227
C223
K220P
+4.0BV
+4.0BV
+4.0BV
+4.0BV
C311
33N
C312
C1P
C313
D10P
C302
J100P
C314
D10P
C315
D10P
C304
D10P
C316
D10P
+3.2V
R295
10K
C319
N.M.
C322
1N8
C321
N.M.
Z1u
C282
C323
0
ANT2
1
C320
1N8
C324
N.M.
CLE
ALE
WRN
RD
N
ACS0
RD
N
R/B
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD16
AD17
AD18
CE
ANT1
LE SO
ANT2
RXDA
RFCLK
SK
RXDSG
WRN
ACS1
DAB3
DAB2
DAB1
DAB0
DAB7
DAB6
DAB5
DAB4
DAB15
DAB7
DAB14
DAB6
DAB13
DAB5
DAB12
DAB4
DAB11
DAB3
DAB10
DAB2
DAB9
DAB1
DAB8
DAB0
DAB15
DAB14
DAB6
DAB13
DAB5
DAB12
DAB4
DAB11
DAB3
DAB10
DAB2
DAB9
DAB1
DAB8
DAB0
DAB7
ROW0
ROW1
ROW2
ROW3
ROW4
ROW5
CS
RES
LED4
LED3
LED2
LED5
PAON
TXDA
RSSI
COL0
COL0
COL1
COL1
COL2
COL2
COL3
COL3
COL4
HANDSET
KX-TCD540RUM/RUT: SCHEMATIC DIAGRAM (BASE UNIT)
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
GND
GND
GND
GND
(1)
(2)
(2)
(3)
(4)
(4)
(5)
(6)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(11)
(12)
(13)
(14)
(18)
(20)
(19)
(17)
(16)
(15)
4V
4V
0V
0V
3.2V
0V
3.2V
0V
3.2V
SP Phone_TX
Audio
Audio
Handset RX
Audio
Tone
Audio
Tone
Handset RX
Audio
Tone
Audio
Tone
Handset TX
Audio
Audio
SP Phone_RX
Audio
Tone
Audio
Tone
RX-DATA
10.368MHz burst
TX-DATA
117
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
38.2. Operation
Q501
Q502
Q503
Q504
LED501
SP_LED
LED502
ANSWER_LED
LED504
BACKLIGHT_LED
LED505
LINK_LED(RED)
R502
220
R504
150
R505
220
C507
1u
0.47u KB
C503
C509
1u
C506
1u
0.47u KB
C504
0.47u KB
C505
0.47u KB
C502
C510 1u
R507
10K
C508
1u
0.47u KB
C501
SW521
GREETING
SW516
M1
SW511
M2
SW506
M3
SW501
TALK
SW517
ANSWER
SW512
SP_SW
SW507
STOP
SW502
CLEAR
SW522
EXIT
SW518
0
SW513
#
SW508
MUTE
SW503
RIGHT
SW523
*
SW519
8
SW514
9
SW509
X3
SW504
DOWN
SW524
7
SW520
5
SW515
6
SW510
X2
SW505
LEFT
SW525
4
SW529
2
SW528
3
SW527
X1
SW526
UP
SW530
1
CN502
22
TEMPS
21
C86
20
V0
19
V4
18
V3
17
V2
16
V1
15
CAP2-
14
CAP2+
13
CAP1+
12
CAP1-
11
CAP3+
10
VOUT
9
VSS
8
VDD
7
D7(SI)
6
D6(SCL)
5
E
4
RW
3
A0
2
RES
1
CS
R503
150
LED503
BACKLIGHT_LED
R501
220
SW531
TP501
TP502
TP503
TP504
TP505
TP506
TP511
TP510
TP509
TP508
TP507
TP512
TP513
TP514
TP515
TP516
TP517
SW532
TPLED4
TPLED3
TPLED2
TPLED5
VDD2
VDD1
GND
CN501
1
HOOK_SW
2
COL0
3
COL1
4
COL2
5
COL3
6
COL4
7
ROW0
8
ROW1
9
ROW2
10
ROW3
11
ROW4
12
ROW5
13
CS
14
RES
15
A0
16
D6(SCL)
17
D7(SI)
18
VDD1
19
VDD2
20
GND
21
LED4
22
LED3
23
LED2
24
LED5
KX-TCD540RUM/RUT: SCHEMATIC DIAGRAM (BASE UNIT) Operation
K
X
-T
C
D
5
40R
U
M
/
/
K
X-
T
T
C
A
154R
U
M
/
/
K
X-
T
T
C
D
540
R
U
T
/
/
K
X-
T
T
C
A
154R
U
T
118
38.3. Memo
119
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
39 SCHEMATIC DIAGRAM (CORDLESS HANDSET)
X1
10.368MHz
+1.8V
IC1
1 P3_7/PD7
2 P3_1/PD1
3 P3_5/PD5
4 PD_4/PD4
5 P3_3/PD3
6 P3_2/PD2
7 VDD
8 VSS
9 RFCLK
2 P3_1/PD1
3 P3_5/PD5
4 PD_4/PD4
5 P3_3/PD3
6 P3_2/PD2
7 VDD
8 VSS
9 RFCLK
10 VDDRF
11 VSSRF
12 Xtal1
13 CAP
14 AVS
15 AVD
16 RSSI
17 RDI
18 CMPREF
19 TDO
20 LE
11 VSSRF
12 Xtal1
13 CAP
14 AVS
15 AVD
16 RSSI
17 RDI
18 CMPREF
19 TDO
20 LE
21
SO
22
SK
23
DAC/ADC2
24
P3_6/PD6
25
UTX/P0_0
26
URX/P0_1
27
JTIO/P0_2
28
PCM_FSC1/P0_3
29
PCM_FSC0/P0_4
30
PCM_CLK/P0_5
31
PCM_DOUT/P0_6
32
PCM_DIN/P0_7
33
VDDIO
34
VSS
35
INT0n/P1_0
36
INT1n/P1_1
37
INT2n/P1_2
38
39
40
41
SCL2/P3_0
42
SDA2
43
VSS
44
VDD
45
P2_0/PWM0
46
P2_!/PWM1
47
P2_2/ADC0
48
P2_3/ADC1
49
P2_4/SCL1
50
P2_5/SDA1
51
P2_7/DC_CTRL
52
DC_I
53
P1_6/PON/INT6n
54
P1_7/CHARGE/INT7n
55
P2_6/stop_charge
56
VABT3/RINGING
57
DC_stab
58
DC_Sense
59
AVS_sense
60
ADC3
61
62
63
64
VBAT2
65
VBAT1
66
AVS2
67
AVD2
68
LSR+/REF
69
LSR-/REF
70
LSR_HS/CIDIN-
71
VREF_HS/CIDOUT
72
MIC-
73
VREF-
74
VBUF
75
AGND
76
MIC+
77
VREF+/CIDIN+
78
RSTN
79
80
VSS
R19
N.M
C7
10P
R20
1K
C6
N.M.
J2
1
BATTERY-
J1
1
BATTERY+
F1
L1
47uH
R1
0.1R/O.1W
D1
R3
180K(1%)
R2
68K(1%)
C1
330U/6.3V
Q2
Q3
R4
15K
C2
10u/6.3v
C3
100n
AG
J4
1
CHARGE-
J3
1
CHARGE+
R5
470R
R6
10K
R7
220K
R8
N.M.
R9
5.6K
R11
10K(1%)
R10
20K(1%)
C4
10P
+2.7V
+1.8V
S1
POWER
R13
N.M.
+2.7V
LED1
LED4
LED5
LED6
LED7
LED8
GREEN
R14
33R
R15
10R
+4V
+4V
R18
120R
R17
47R
R21
1K
GND
URX
UTX
BATT
C8
220n
R24
470K
C9
68n
R43
0.22R/0.1W
C18
1000P
C27
1u
C28
1u
C29
1u
C30
1u
C33
470n
C32
470n
C31
470n
C34
470n
C35
470n
+2.7V
R26
100R
R25
330R
100n
C21
C39
1u
R46
5.6K
R47
5
.6K
R48
33R
C40
10u/6.3v
C5
10u/6.3v
100n
C20
100n
C24
100n
C22
100n
C23
100n
C19
C52
1
00n
+2.7V
C57
330U/6.3V
R57
68
C58
100n
CN2
1
CS2
2
RESET
3
A0
4
SCL
5
SI
6
VDD
7
DSS
8
VOUT
9
CAP3+
10
CAP1-
11
CAP1+
12
CAP2+
13
CAP2-
14
V1
15
V2
16
V3
17
V4
18
V0
C59
1U
Q7
LED9
R59
56R
X1
JTAG
R60
1k
R61
10k
R63
10k
R64
10k
C71
N.M.
C72
N.M.
C68
6
8n
C37
6
8n
Q1
G
S
D
R12
39K
L4
10uH
R68
N.M.
R67
N.M.
R69
N.M.
R70
N.M.
C74
100n
C73
100n
D3
N.M.
N.M.
L5
10uH
LED2
TP10
TP11
TP12
TP16
Q4
D6
Q9
Q10
Q11
R73
560k
Q5
R72
1K
D7
LED10
RED
10P
C90
10P
C91
100P
C93
100P
C94
C96
N
.M.
R81
0
R82
N.M.
D9
N.M.
RXDSG
PAON
PSEL
PSEL
SYRI
SYEN
TXDA
RXDA
RSSI
SYDA
SYCL
PANEL
SCL
P0
PWM1
COL1
COL2
COL3
COL4
COL5
ROW0
ROW1
ROW3
ROW2
COL0
RESET
A0
CS2
RESET
SCL
RESET
CS2
SI
SCL
SI
P3
P2
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(19)
(20)
(21)
Charge Current
115KHz
2.7V DC
4.0V DC
1.8V DC
RX-AF (Speaker phone)
RX-AF (Handset)
TX-AF
3.7V
3.6V
0V
0V
1.8V
0.9V
0.9V
0.9V
0V 0.9V
1.5V
0.9V
0.9V
1.5V
1.8V
2.7V
0V
1.8V
0V
0V
1.8V
0V
0V
0V
1.8V
1.8V
2.7V
2.7V
0V
Beep signal
Charge LED
10.368MHz
840mVp-p
to LCD Module
1sec cycle
2.8V
(When ON Charge)
0V
1.8V
120
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
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