Read Panasonic KX-NT551RU-B Service Manual online
6
KX-NT551RU/KX-NT551RU-B
4 Technical Descriptions
4.1.
Block Diagram
Main PCB
Power Supply
Ethernet I/F
RJ45
RJ45
5V DC/DC
Plug
JK301
L2SW
JK402
LAN port
PC port
JK401
PoE
BBIC
IC501
MII
memory
controller
SDRAM
128Mbits
SPI
FLASH
128Mbits
15pin connector
LCD
12pin
connector
Ope PCB
12pin
connector
3.3V
DC/DC
Backlight
Class D
Amp
JTAG
2.2V
DC/DC
25MHz
IC503
IC504
IC303
IC301
Q505
IC401
IC402
GPIO
AFE
SP
MIC
HAND
SET
JACK
ASIC
IC205
I2C
HEAD
SET
JACK
EHS
JACK
LED
KEY
JK202
JK203
CN205
CN101
CN504
USB
IC101
JK101
X501
Analog I/F
CPU, MEMORY
LCD
LED,KEY
12V
9V
3.3V
2.2V
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