Read Panasonic KX-NT511ARUW / KX-NT511ARUB (serv.man2) Service Manual Supplement online
KX-NT511ARUW/KX-NT511ARUB
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_RS
T
3.3V
DGND
L2SW_3.3V
R202
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
R2
04
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
C2
12
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
R23
1
E_RXCLK
001:5B
RA201
1
8
E_CRS
001:5C
R23
0
E_TXD[3]
001:5B
C214
R219
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
SMTXEN
3
17
SMTXD33/EN_REFCLKO_
3
18
SMTX
D3
2
19
SMTXD3
1
20
SMTXD3
0
21
GND1
22
VDDIO1
23
SMTXC3/REFCLKI_
3
24
SMT
XER3/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
SD
A_MDI
O
38
SPI
Q
39
*S
PI
SN
40
VDDIO2
41
GN
D
42
VDDC
O
43
P1LED1
44
P1LED
0
45
P2LED
1
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
C202
C2
57
C258
C259
C2
60
C261
C262
C263
C264
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
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