Panasonic KX-NT560RU / KX-NT560RU-B Service Manual ▷ View online
9
KX-NT560RU/KX-NT560RU-B
4.2.4.
Analog Circuit
1. Speaker phone call
Transmitting signal is input from microphone
→ input to IC103-pin 83,84 → A/D conversion, Gain adjustment and echo cancel
by a built-in DSP of IC103
→ D/A conversion → output IC103 pin 98,99 → input to IC503-pin A16,B16 → A/D conversion,
Gain adjustment
→ IP Line.
Receiving signal input from IP Line
→ Gain adjustment and D/A conversion by DSP of IC503 → output from IC503-pin
A13,B13
→ input to IC103-pin 93,94 → A/D conversion, Gain adjustment → D/A conversion → output IC103 pin 78,79 →
Amplified by IC101 and output to Speaker.
Class D Amp IC101 is controlled as follows;
IC101-pin1 H (3.3V): Amp ON , IC101-pin1 L (0V): Amp OFF
Class D Amp IC101 is controlled as follows;
IC101-pin1 H (3.3V): Amp ON , IC101-pin1 L (0V): Amp OFF
2. Handset call
Transmitting signal is input from handset microphone
→ input to IC503-pin A14,B14 → A/D conversion, Gain adjustment by a
built-in DSP of IC503
→ IP Line.
Receiving signal input from IP Line
→ Gain adjustment and D/A conversion by DSP of IC503 → output from IC503-pin C13 →
output to handset speaker.
C1004
C1003
C1005
DG
L101
C106
C109
DG
DG
DG
C115
C105
C131
C128
C129
DL101
1
2
3
C113
C118
C130
C108
L102
C176
IC101
1
STBY
2
NC
3
IN+
4
IN-
5
OUT+
6
VDD
7
GND
8
OUT-
9
FIN
D104
SPN
SPP
SP
5V
D103
DG
SN
C152
C153
DG
R104
R106
DG
R121
C136
R123
R128
C110
R120
R107
D102
R129
D101
R140
R134
C149
R145
C167
C156
C162
C164
C124
C125
MICN
MICP
MIP
MIN
C172
C174
R108
3.3VA
AG
AG
AG
AG
AG
AG
AG
AG
R122
R116
C103
DG
C134
C142
IC103
84
98
99
93
94
83
78
79
C143
DG
C144
DG
R550
C122
C121
IC503
C119
C120
B16
A16
A13
B13
P4
BBIC
HSMICINP
IC503
BBIC
C140
R130
R131
R132
C177
R125
C139
C138
JK101
1
2
3
4
5
C137
C193
C135
D106
C192
R133
D107
C191
R126
L107
C141
D105
R160
R161
C155
C154
3.3VA
AG
C157
C158
AG
AG
AG
AG
AG
AG
AG
AG
C527
AG
R115
C159
AG
R127
R101
C102
A14
C13
B14
10
KX-NT560RU/KX-NT560RU-B
3. Headset Call
Transmitting signal is input from headset microphone and amplified by IC105
→ input to IC503-pin B15 → A/D conversion,
Gain adjustment by a built-in DSP of IC503.
Receiving signal input from IP Line
Receiving signal input from IP Line
→ Gain adjustment and D/A conversion by DSP of IC503 → output from IC503-pin D14 →
output to headset speaker.
+
-
+
-
JK202
1
4
2
3
5
C211
HEADGND
HEADGND
HEADGND
D205
C213
L207
D204
HEADGND
R215
C207
C208
AG_L
HEADGND
HEADGND
L208
C214
NC
C210
L206
D206
21
CN201
C150
IC105
5
6
7
IC105
3
2
1
AG
3.3VA
R138
R135
R166
C166
R144
C169
C1010
NC
C160
C194
R147
C1011
C1007
R142
R143
R146
C147
AG
C1009
R165
AG
AG
C195
3.3VA
CN101
L105
AG
R148
C165
1000p
C1008
IC503
IC204
B15
D14
11
KX-NT560RU/KX-NT560RU-B
4. Bluetooth Headset call
The Bluetooth (BT) Module (IC506) is controlled by IC503 (BBIC) and IC103.
IC503 (BBIC) controls data communication on IC103 and IC506 in serial data.
The Bluetooth headset voices of transmission and reception are transferred by PCM.
IC503 (BBIC) controls data communication on IC103 and IC506 in serial data.
The Bluetooth headset voices of transmission and reception are transferred by PCM.
Transmitting signal is input from Bluetooth headset microphone
→ R606 → input to IC506-pin 19 → output from IC506-pin 3
→ R592 → input to IC103-pin 60 and D/A conversion → output from IC103-pin 98,99 → input to IC503-pin A16,B16 and gain
adjustment by a built-in DSP of IC503
adjustment by a built-in DSP of IC503
→ IP Line
Receiving signal is input from IP Line
→ Gain adjustment by DSP of IC503 → output from IC503-pin A13,B13 → input to
IC103-pin 93,94 and A/D conversion
→ output from IC103-pin 56 → R109 → input to IC506-pin 31 → output from IC506-pin
19
→ R606 → Bluetooth headset speaker.
IC506
C119
SPP
C120
SPN
C121
MIP
C122
MIN
IC503
R527
R149
R102
C173
A13
B13
A16
B16
C18
D16
T7
P1
P3
M17
BT Module
IC103
93
94
98
99
57
60
56
55
10
11
8
R591
R592
R109
R596
BBIC
R636
3.3V
R531
3.3V
BT_FS
BT_DIN
BT_DOUT
BT_BCLK
2
3
31
32
PCM_SYNC
PCM_OUT
PCM_IN
PCM_CLK
R593
R599
R600
C561
BT_TX
BT_RX
BT_RST
6
9
14
R606
19
Bluetooth
Bluetooth
Headset
12
KX-NT560RU/KX-NT560RU-B
4.2.5.
ASIC (IC204)
IC204 controls KEY, LED, EHS and Headset-detect.
An operating clock is provided by IC503 and a reset signal from the IC503 starts either reset or normal operating.(L(0V):RESET)
The IC204 and IC503 are connected by an I2C communication.
IC503 checks the presence of IC204 by getting the signal from IC204.
An operating clock is provided by IC503 and a reset signal from the IC503 starts either reset or normal operating.(L(0V):RESET)
The IC204 and IC503 are connected by an I2C communication.
IC503 checks the presence of IC204 by getting the signal from IC204.
LED and KEY Timing chart
The LED control and the KEY control use the same strobe(STB) signal.
Therefore, the LED control and the KEY control are alternately executed.
The timing chart is as shown in the following .
The LED control and the KEY control use the same strobe(STB) signal.
Therefore, the LED control and the KEY control are alternately executed.
The timing chart is as shown in the following .
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