Panasonic KX-NT553RU-B / KX-NT556RU-B Service Manual ▷ View online
61
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
AGND
DGND
VCC5V
C194
1u
10
C193
0.1u
16
C185
0.22u 10
VDD12V
DGND
SINK_GND
DCDC_GND
SINK_GND
DCDC_GND
DCLS_GND
VDD18V
C184 0.1u
16
C18
6
1u
10
SINK_GND
AGND
C195 10u
6.3
C202
0.22u
C203
0.22u
10
EXTREGCTL
C204 22u
6.3
OP_DET
001:6D;001:7E
IC502
U14
VCC5V_DCDC
W15
DCDC_VRP
T14
DCDC_VSENS
V14
COIL_DCDC
W14
SINK_DCDC
W13
GND_DCDC
V15
VDD18_DCDC
W16
VCC33_DCDC
N13
VDD_ANA
V17
VCC_ANA0
W12
VCC_ANA1
N16
VCCA
T13
EXT_REG_CTL
U13
PWM0
V13
LEDSINK1_PWM1
R14
LEDSINK2
R19
DCIN0
U19
DCIN1
P17
DCIN2
W19
DCIN3
U12
DCINS
T19
GNDI
N17
GNDA
R16
VSS1
R17
VSS2
U18
VSS3
W18
VSS4
N18
XI13M
R128
10
DGND
AVCC33V
VDD33V
5V_DET
003:4B
R127
NC
AGND
AGND
DCIN1_1
OPE-GND
DGND
LEDSINK
2
CL_VDD12V
CL_VDD18V
DCIN3
DCIN1
PWM0
004:7D
PWM1
004:7E
L110 6.8
u
2/4
KX-NT553
58
/ KX-NT556
58
MAIN BOARD No.4 2/4
6
5
8
7
A
B
C
62
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
R118
12k
MICBIAS
C137 NC
HEADSET-OUT
C136
0.47u
L108
R113 2.2k
C143
NC
HEADSET-IN
AGND
AGND
AGND
AGND
C129 NC
R104 2.2k
R109 3.3k
C117 0.1u
10
R106 220
C116 0.1u
10
C119 NC
C120 NC
R105
2.2k
R110 3.3k
C109 NC
R107 220
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
TEST_ANA
C146 10u
6.3
AGND
VDD33V
VDD12V
PWR_RST
C174
100p
50
DGND
VDD18V
C167 0.1u
16
C182
0.1u 16
DGND
C158
0.1u
16
C161
0.1u
C164
0.1u
C166
0.1u
C169
0.1u
C171
0.1u
DGND
C152
22u
6.3
6.3
C157
0.1u
DGND
C160
0.1u
C163
0.1u
C154
0.1u
16
C156
0.1u
C155
22u
6.3
MICP
MICM
PDN 003:6D
V12
RSTN
T12
TEST_ANA
L16
IF_CLK_IF
P14
VREF
D12
VDD0
E5
VDD1
E6
VDD2
E8
VDD3
H5
VDD4
K13
VDD5
K5
VDD6
M10
VDD7
M8
VDD8
N12
VDD9
G5
VDDIO0
H6
VDDIO1
J5
VDDIO2
K12
VDDIO3
L6
VDDIO4
N10
VDDIO5
M13
VDDIO_APU
N9
VDDIOC
J7
GND35
G10
GND33
H12
GND34
AGND
R126 330
R102
0
R103
0
R123
330
AGND
MICBIAS
C205
10u
10
C149
10u
10
C112 1000p
C113 1000p
50
C130 1000p
50
C144 1000p
50
C105
330p
50
C106 330p
50
HEADSET_IN
001:4E
HEADSET_OUT
001:4E
L106
D101
D102
R124
0
C107 0.01u
DGND
CL-MICP
CL-MICM
DGND
R121 0
DGND
4
OUT
3
CD
1
2
C104 1000p
IC101
VSS
VDD
(5)
(4)
(3)
(2)
(1)
(6)
3/4
KX-NT553
58
/ KX-NT556
58
MAIN BOARD No.4 3/4
3
2
1
4
E
D
F
(1)
63
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
DGND
C192 220p
C201 0.1u
16
C198 0.1u
C189 220p
C191 220p
C200 0.1u
C188 220p
C197 0.1u
C187 220p
DGND
C196 0.1u
C190 220p
C199 0.1u
DGND
VDD12V
DGND
DGND
DGND
DGND
DGND
C206 22u
6.3
5V
C216 0.1u 16
BKLT2P
BKLT2N
IC502
J6
GND10
H8
GND9
L7
GND8
K11
GND7
H11
GND6
K8
GND5
J8
GND4
J11
GND3
H10
GND2
J9
GND1
G13
PLL3_DVDD
H13
PLL3_AVSS
L13
PLL3_AVDD
E11
PLL2_DVDD
G12
PLL2_AVSS
F11
PLL2_AVDD
G8
GND32
G6
GND30
K6
GND29
E9
GND28
L8
GND27
J10
GND26
L12
GND25
G9
GND24
M12
GND23
G7
GND22
K7
GND21
M9
GND20
K9
GND19
L11
GND18
M11
GND17
A1
GND16
L10
GND15
L9
GND14
H9
GND13
H7
GND12
K10
GND11
E13
PLL1_DVDD
F12
PLL1_AVSS
F13
PLL1_AVDD
P19
XO13M
N19
BCLK
DGND
BL-2N
BL-2P
L115
R101
0
DGND
5V
C123 0.1u 16
L101
BL-1P
BKLT1P
BKLT1N
BL-1N
Q10
1
DGND
Q10
2
R130
R132
47k
4.7k
DGND
PWM0 004:6C
PWM1 004:6C
R133
82
Main LCD BackLight
Self-Labeling LCD BackLight
(6)
6
5
8
7
D
E
F
KX-NT553
58
/ KX-NT556
58
MAIN BOARD No.4 4/4
4/4
64
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
12.5. Ope
C
B
A
3
2
1
4
KEYIN0 KEYIN1
ASIC_CLK
LED_BELL_R
LED_BELL_G
INT0
ASIC_RST
I2C_SDA
LED_STB3-R
LED_STB3-R
LED_STB1-R
LED_STB0-R
LED_STB4-R
LED_STB3-R
LED_STB2-R
ASIC_CLK
LED_COM3
KEYIN4
KEYIN4
LED_COM3
KEY_STB1
LED_COM3
KEY_STB3
5V
KEY_STB5
HEADSET_DET
DG
3.3V
LED_COM2
LED_COM4
LED_COM4
LED_COM5
LED_COM5
LED
LED
LED
LED
LED
LED_COM1
LED_COM4
I2C_SCL
EHS_TX
EHS_RX
C241
0.1u
C221
NC
C217
22u
C218
22u
3.3V
C202
0.1u
EHS_DET
JK202
1
4
2
3
5
30p
05
00p
AG
PAD
J203
J232
J234
J233
J227
J210
J220
J211
J230
J218
J221
J215
J202
J205
J219
J216
J201
J206
J204
L210
L209
L208
5V
R222
NC
C204
10u
C213
4.7u
AG
AG
AG
HOOK_SW
12
07
NC
R223
2.7k
L212
HEADGND
HEADGND
C244
NC
CN205
1
2
3
4
5
6
7
8
9
10
11
12
13
14
JABRA_URX
JABRA_UTX
DG
DG
CN206
1
2
3
4
5
6
7
8
9
10
11
12
CN207
1
2
3
4
5
6
7
8
9
10
11
12
C245
NC
D255
1
2
D247
1
2
246
1
D245
1
2
DG
R259 NC
J281
J282
J283
J284
J285
J295
J296
L213
R261
270
Chip Jumper:Near FF key
DSS
(1)
(2)
(3)
(4)
(5)
(6)
(32)
(31)
(30)
(29)
(28)
(27)
(26)
(25)
(24)
(23)
(22)
(21)
(20)
(19)
1/4
KX-NT553
58
/ KX-NT556
58
OPERATION BOARD 1/4
Click on the first or last page to see other KX-NT553RU-B / KX-NT556RU-B service manuals if exist.