Panasonic KX-NT511PRUW / KX-NT511PRUB (serv.man2) Service Manual / Supplement ▷ View online
KX-NT511PRUW/KX-NT511PRUB
5
1.2.2.3. Ethernet Circuit
The Layer2 Switch IC (IC201) is used for the Ethernet interface.
It is connected from IC201 to the Ethernet port (JK1 and JK2) through a transformer and so is isolated.
It is connected between IC201 and the BBIC (IC302) by high-speed bus called MII (Media Independent Interface) bus
operating with 25MHz.
E_RXDV
E_TXD[0]
E_MDIO
E_COL
E_TXEN
E_TXD[2]
E_TXD[3]
E_
TXD
[2]
E_RXCLK
E_
TXE
R
E_COL
E_TXER
E_MDCLK
E_TXCLK
E_RST
E_RXD[1]
E_TXD[0
]
E_TXCL
K
E_TXD[1
]
E_RXD[3]
E_RXCLK
E_TXEN
E_RXD[3]
E_RXDV
E_RXD[1]
E_TXD[1]
E_CRS
E_RXD[0]
E_TXD[3]
E_RXD[0]
E_RXD[2]
E_MDCLK
E_RXD[2]
E_CRS
E_MDIO
PC_TXP
PC_TXM
PC_RXP
PC_RXM
WAN_TXP
WAN_TXM
WAN_RXP
WAN_RXM
PC_TXP
PC_TXM
PC_RXP
PC_RXM
WAN_TXP
WAN_TXM
WAN_RXP
WAN_RXM
PHY_INT
PHY_INT
E_RXD[0]
E_RX
D[1]
E_RXD[2]
E_RXD[3]
E_TXD[0]
E_
TXD[1
]
E_TXD[2]
E_TXD[3]
E_RST
3.3V
DGND
L2SW_3.3V
R2
02
R2
01
DGND
C207
R205
R206
DGND
DGND
DGND
R207
C208
R208
DGND
DGND
DGND
R209
C209
R210
R212
DGND
DGND
C210
R211
C227
C22
8
1.8V
C2
25
C22
4
C21
6
C21
7
C2
19
C22
0
C201
DGND
R20
3
R204
C203
DGND
C204
DGND
C205
DGND
C206
DGND
D201
D202
D203
D204
D205
D206
D207
D208
E_RXD[2]
001:5C
E_TXCLK
001:5B
E_TXER
001:5C
R218
E_RXD[1]
001:5C
4
5
E_MDIO
001:5B
E_TXEN
001:5C
C212
E_RXD[0]
001:5C
R217
R213
L203
C211
NC
E_COL
001:5B
E_RXDV
001:5B
R215
R232
E_TXD[0]
001:5B
L205
R231
E_RXCLK
001:5B
RA201
1
8
E_CRS
001:5C
R23
0
E_TXD[3]
001:5B
C214
R21
9
E_TXD[2]
001:5B
2
7
E_RST
001:5C
E_MDCLK
001:5B
L204
E_RXD[3]
001:5C
C213
E_TXD[1]
001:5B
3
6
25MOUT
001:4C
DGND
C215
C221
C2
18
R2
16
4.7k
L2SW_1.8V
1.8V
L2SW_1.8V
C222
DGND
C2
23
C226
L2SW_3.3V
DGND
DGND
PHY_INT
001:4C
L206
2
3
1
4
L207
2
3
1
4
L208
2
3
1
4
L209
2
3
1
4
L202
L201
IC201
13
NC
14
X1
15
X2
16
SMTXEN3
17
SMTXD33/EN_REFCLKO_
3
18
SMTX
D3
2
19
SMTXD3
1
20
SMTXD3
0
21
GND1
22
VDDIO1
23
SMTXC3/REFCLKI_
3
24
SMTXER3/MII_LINK_
3
25
SMRXDV3
26
SMRXD33/REFCLKO_3
27
SMRXD32
28
SMRXD31
29
SMRXD30
30
SMRXC3
31
GND2
32
VDDC
33
SCOL3
34
SCRS3
35
*INTRN
36
SCL_MDC
37
SDA_MDIO
38
SPIQ
39
*S
PI
SN
40
VDDIO
2
41
GN
D
42
VDDC
O
43
P1LED
1
44
P1LED0
45
P2LED1
46
P2LED0
47
*R
STN
48
FXSD
1
1
RXM1
2
RXP1
3
TXM1
4
TXP1
5
VDDA_3.3
6
ISET
7
VDDA_1.8
8
RXM2
9
RXP2
10
AGND
11
TXM2
12
TXP2
T1
1
8
6
2
3
16
7
14
11
9
15
4
10
13
5
2
1
T2
1
8
6
2
3
16
7
14
11
9
15
4
10
13
5
2
1
PC1
PC2
PC3
PC4
PC5
LAN1
LAN2
LAN3
LAN4
LAN5
TX1P
TX1M
RX1P
RX1M
PCR
TX2P
TX2M
RX2P
RX2M
LNR
C2
02
C2
57
C25
8
C259
C2
60
C261
C262
C263
C26
4
DGND
C27
3
PoE1
PoE2
R243
R242
R220
R221
R222
R101
R223
R214
27
0
R244
C2
56
C255
IC302
JK1
JK2
1.2.2.4. Analog Circuit
1. Speaker phone call
Transmitting signal is input from microphone (differential amplifier circuit) → input to IC302-E15, D15
→ A/D conversion, Gain adjustment and echo cancel by a built-in DSP of IC302.
Receiving signal input from IP Line → Gain adjustment and D/A conversion by DSP of IC302
→ output from IC302-K15, M14 → output to Speaker.
SPM
DGND
DGND
L304
CL-SPM
R329
C380
CL-SPP
C3
73
D305
DGND
C3
78
C374
L303
C376
D
N
G
D
D
N
G
D
C375
DGND
DGND
SPP
R330
C377
C37
DGND
D306
L301 22u
L302
G1C220MA0249
C362
R325
R320
C366
R322
C365
C363
C364
R326
R321
C370
NC
R323
220
AGND
AGND
AGND
AGND
AGND AGND
AGND
AGND
AGND
MICP
MICM
R327
R328
AGND
MICBIAS
C367
C368
C3
71
C372
D307
D308
CL-MICP
CL-MICM
C369
R324
AGND
AGND
C383
C384
IC302
K15
M14
E15
D15
Speaker
Mic
6
KX-NT511PRUW/KX-NT511PRUB
2. Handset call
Transmitting signal is input from handset microphone → input to IC1302-F14, E14
→ A/D conversion, Gain adjustment by a built-in DSP of IC302.
Receiving signal input from IP Line → Gain adjustment and D/A conversion by DSP of IC302
→ IC302-F12, G12 output from → output to handset speaker.
AGND
AGND
C381
C382
IC302
F12
G12
Handset
Jack
R314
C348
R317
R316
C356
C351 R311
R312
C352
R313
AGND
AGND
AGND
MICBIAS
C353
C354
C357
C358
D301
D302
HS_MICP
HS_MICM
C355
CL-HS_MICP
CL-HS_MICM
R315
C391
C392
AGND
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D309
D310
L310
L311
AGND
AGND
L306
L305
AGND
AGND
AGND
AGND
C359
NC
C360
NC
C361
330p
D303
D4ED18R00008
D304
D4ED18R00008
HS_SPP
HS_SPM
CL-HS_SPP
CL-HS_SPM
E14
F14
1.2.2.5 Key Circuit
The key data is under the matrix control by IC302.
The key information output from LED_STB is input into KEYIN, when the key is pressed.
The HOOK key is independent from Key Scan Matrix and taken into the port singularly.
[Ope PCB]
MIP
SPP
SPN
KEYIN[2]
KEYIN[0]
KEYIN[1]
KEYIN[4]
KEYIN[3]
KEYOUT[4]
KEYOUT[3]
KEYOUT[2]
KEYOUT[1]
KEYOUT[0]
KEYOUT[3]
KEYOUT[2]
KEYOUT[1]
KEYOUT[0]
*
12
9
12
1
12
REDIAL
12
0
12
7
12
#
12
5
12
3
12
8
12
6
12
4
12
2
12
ICM
12
FLASH
12
MUTE
12
CONF
12
TRANSFER
12
HOLD
12
SP-PHONE
12
FF1
12
FF2
12
FF3
12
UP
12
DOWN
12
KEYIN[5]
OPE_3.3V
SW1
HOOK SW
1
2
2
3
4
5
5
6
R405
IC302
R8
P8
P8
M8
P7
L8
N8
R7
M7
P6
P9
N7
KX-NT511PRUW/KX-NT511PRUB
7
1.2.2.6. LED Circuit
The lighting of the LEDs is controlled by IC302.
All LEDs are static lighting system.
[Ope PCB]
G
R
G
R
G
R
LED[0]
LED[1]
LED[2]
LED[3]
LED[4]
LED[5]
LED[6]
LED[7]
LED[8]
LED[1]
LED[2]
LED[3]
LED[4]
LED[5]
LED[6]
LED[7]
LED[8]
LED401
FF1
3
4
1
2
LED403
FF3
3
4
1
2
LED402
FF2
3
4
1
2
OPE_3.3V
LED404
IC
M
LED405
MUTE
LED406
SP-PHON
E
L401
LED407
MESSAG
E
LED-
A
LED-
K
LED[0]
LED[1]
LED[2]
LED[3]
LED[4]
LED[5]
LED[6]
LED[7]
LED[8]
LED[1]
LED[2]
LED[3]
LED[4]
LED[5]
LED[6]
LED[7]
LED[8]
DGND
Q101
1
2
3
2
3
4
5
Q102
1
2
3
2
3
4
5
Q105
1
2
3
2
3
4
5
Q103
1
2
3
2
3
4
5
Q104
1
2
3
2
3
4
5
R115
R161
R123
R163
R126
R164
R138
R165
R105
R166
R167
R148
R150
R152
R153
R154
R155
R153
R154
R155
R156
R147
R149
R151
IC302
N9
L5
R10
N6
N5
R9
L6
L7
M5
M6
LED_K
3.3V
LED_A
[LED PCB]
VDD_3.3V
8
KX-NT511PRUW/KX-NT511PRUB
1.2.2.7 Power Supply Circuit
Ab
out
5V
L2
SW
DV
F
Pa
ne
ll
Ma
in
LC
D
AG
+5
V_
fr
om
PC
8V
57
V
42
+3
.3
V
US
B
SD
RA
M
3.3V
A
DCDC/
Di
gi
ta
l
D
Am
plif
ie
r
An
al
og
H
and
se
t
MI
C
Sp
ea
ke
r
RJ
45
(P
C)
DG
AC
5.5V
/500
mA
1.8V
1.2V
DD
R
IF
DCDC
3.
3V
Di
gi
ta
l Pa
rt
VD
D(
3.3 or
2.5)
IN
TE
RNA
L_1.2V
An
al
og
Pa
rt
IN
TE
RNA
L_1.8V
IN
TE
RNA
L_1.8V
NA
ND
FL
AS
H
KEY
RJ
45
(L
AN
)
LE
D
LC
D
Co
nt
ra
st
5V
Te
rminatio
n
PoE_AG
PoE_
G
Te
rminatio
n
Po
E
DCDC
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