Read Panasonic KX-NT346RU (serv.man2) Service Manual online
5
KX-NT346RU/KX-NT346RU-B
4 Technical Descriptions
4.1.
Block Diagram
Handset
PoE chip
IC9
nRST_PHY
nRST_PHY
JK1
JK2
X1
TX_CLK
RxRDY,OP_DET,SCLK,
RxD,TxD, RESET_OUT
DC/DC
+4V
+3.3V
+1.5V
REG(1.5V)
25.00
MHz
PULSE
Trans
T2
RJ45
Super
CAP
To LAN
10/100Base-t
To PC
10/100Base-t
RJ45
PULSE
Trans
T1
X2
REG(3.3V)
+9V
DC IN
DC ALARM
CN2
(For Option)
IC10,31
IC11
C501
C502
TX_EN,TX_ER,
TXD[3:0],
CRS
TX_CLK
RX_DV
RX_ER
RXD[3:0],
RX_CLK
COL
Ethernet
PHY
(KSZ8041)
IC6
MAC1
MII2
TX_EN,TX_ER,
TXD[3:0],
CRS
RX_DV
RX_ER
RXD[3:0],
RX_CLK
COL
Ethernet
PHY
(KSZ8041)
IC7
MAC2
MII1
BK_LIT
Data Bus
Bluetooth unit
<LCD_Boad>
SIO
GPIO
CN603
PCMSYNC1,PCMOUT,
PCMIN,PCMCLK
CN
604
CN
602
PIO[3:0],RESET,
UART_TX/RX,UART_RTS/CTS
IC28
IC27
IC27
IC25
IC24
Q1
IC26
IC26
IC20
IC20
IC26
SW
IC30
IC23
IC21
IC28
SW
HSIN
HSOUT
MICIN
SPOUT
MUTE_SP0
MUTE_SP1
MUTE_SP2
IC29
PCM_I/F
GPIO
CPU(Slave)
IC8
IC13
IC12
TXD,RESET,
RXD_SUB,SCLK_SUB
LED / Key
IC4
SDRAM
8Mbyte
FLASH
4Mbyte
MIC
Speaker
VoIP/DSP
Address Bus
Reset
IC
+48V
8.192
MHz
INT
CN5
CN4
Analog
IF
IC1
JK5
RJ11
JK4
HeadSet IF
RESETn
Transistor
SW
SW
SW
SW
SW
SW
IC3
IC2
KX-NT346
RU
/KX-NT346
RU
-B Block Diagram
Eth
ern
et
I/
F
KEY
/LE
D/
LCD
Ana
log
I
/F
Pow
er I/
F
CN
601
CN
9
LCD
Back
light
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