Read Panasonic KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT Service Manual online
+2.7V
IC10
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
R39
10K
R40
22K
TALK
INT
8
5
MAIL
7
SP
*
3
6
9
CLEAR
R
#
0
2
1
4
SOFT_A
MIC
R37
33R
R38
33R
C10
100n
R29
2.2K
IC2
1
CD
2
FC2
3
FC1
4
VIN
5
VO1
6
VCC
7
GND
8
VO2
R34
180K
R35
27K
C14
100n
C13
100n
C15
1u
C16
100n
+4V
C38
470P
R36
68K
C12
1u
N.M.
C43
N.M.
C41
10u
C42
CN4
1
5
4
3
2
+2.7V
C46
100n
C48
0.047u
R52
18K
C45
100n
C49
100n
C47
100n
R51
1M
X2
+2.7V
+4V
IC3
5 RSSI
6 VCC_OC
7 GND
8 SYCL
9 SYDA
6 VCC_OC
7 GND
8 SYCL
9 SYDA
10 SYEN
11 GND
12
RXDSG
13
SYRI
14
GND
15
GND
16
GND
17
GND
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
A201
R55
10K
10K
L2
4.7uH
C56
68p
C54
33p
C55
100n
IC4
1I
R
Q
2
IFSEL
3
SYNC
4
AVDD
5
TESTA
6
TESTA
7
TESTA
8
VREFL
9
VREFR
10
AOUTL
11
AOUTT
12
AGND
13
PTESTO2
14
ILE
15
CS
16
RD
17
WR
18
D7/TESTO
19
D5/TESTO
20
D5/ERQ
21
D4/SRQ
22
D3/ARQ
23
D2/SCLK
25
D1/SDOUT
26
D0/SDIN
27
VDDIO
28
DVDD
29
PTESTIN1
30
CLOCK
31
P0
32
P1
33
P2
34
P3
35
P4
36
PTESTO1
37 VIB
38 DrvGND
39 PANEL
40 PWM0
41 PWM1
42 PWM2
43 PWM3
44 DVDD
45 DGND
46 TEST1
47 PTESTIN2
48 RESET
38 DrvGND
39 PANEL
40 PWM0
41 PWM1
42 PWM2
43 PWM3
44 DVDD
45 DGND
46 TEST1
47 PTESTIN2
48 RESET
24
DGND
C44
1u
C60
4.7u
C61
B 1u
R58
2.2
C62
4.7u
C63
5
600p
C64
2p
C65
2p
C66
2p
SP_TEST2
SP_TEST1
REV_TEST1
REV_TEST2
SW1
COM
C
P
B
A
D
P
B
A
D
R62
10k
C69
2p
Q8
R65
N.M.
C70
100n
R66
10k
R50
100R
IC5
1
1A
2
3Y
3
2A
4
GND
5
2Y
6
3A
7
1Y
8
VCC
TP15
R71
100k
TP1
TP2
TP3
TP4
TP5
TP6
CLK
TP8
TP9
D5
C67
10p
(10-05)
C76
N.M.
C78
N.M.
C79
N.M.
D4
L
C80 2.2u
21-25
R74
0R
C83
N.M.
TP13
R75
0R
N.M.
C85
N.M.
C84
C81
2
p
C82
2p
D8
C86
1u
R77
680R
R76
22K
10P
C17
10P
C89
10P
C87
10P
C92
10R
R80
C95
N.M.
(2125)
C100
1u
10P
C77
10P
C75
R90
10K
C101
100n
COL4
COL5
COL3
COL2
COL1
P0
PANEL
PWM1
ROW3
COL0
TXDA
SYCL
SYDA
SYEN
SYDA
SYEN
RXDSG
RXDA
PSEL
P2
P3
SYRI
PAON
RSSI
ROW 2
ROW1
ROW0
HEADSET JACK
DOWN
RIGHT
LEFT
UP
PUSH
KX-TCA154RUM/RUT: SCHEMATIC DIAGRAM (CORDLESS HANDSET)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(19)
(20)
(21)
3.9V
0V
Speaker
Receiver
MIDI signal
0V (without Headset)
1V (with Headset)
1V (with Headset)
0V
2.7V
0V
2.7V
0V
2.7V
2.7V
2.7V
0V
TX-DATA
RX-DATA
4.2V
0V
2.7V
121
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
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