Read Panasonic KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT Service Manual online
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
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