Read Panasonic KX-UT248RU / KX-UT248RU-B (serv.man3) Service Manual online
6
KX-UT248RU/KX-UT248RU-B
4 Technical Descriptions
4.1.
Block Diagram
+5V
AFE
MII
ARM9 and Teak Lite DSP
DSPG DWE76
GPIO
SYSRSTB
SDRAM
32Mbyte
FLASH
16Mbyte
RJ45 CON
To LAN
10/100/1000BASE-T
Ethernet I/F
13.824
MHz
TXD[3:0]
CRS
TX_CLK
RX_DV
RX_ER
RX_ER
RXD[3:0]
RX_CLK
COL
PHY_nRST
MDC
MDIO
TX_EN
Data Bus
Address Bus
HEADSET_DET
Analog I/F
LCD
Ope PCB
LED matrix
LCD_RD
LCD_RST
Backlight
LCD
4.4inch
HOOK SW
HOOK_DET
Key matrix
Dinamic
EHS_DET
NAND/
LCD
LCD I/F
+1.3V
MPMC
+9V
DC IN
802.3af
PoE IC
+48V
PDN
DC/DC
+3.3V
DC/DC
Power supply
Reset
IC
+3.3V
DG
CAP
DG
REG
+1.3V
+5V
EHS
ASIC_RST
EHS_RX
ASIC_CLK
INT0
I2C
I2C_SCL
I2C_SDA
HEADSET_MIN
HEADSET_SPOUT
Bluetooth
Module
FLASH_nRST
PCM
EHS_TX
Headset
UART(2)
UART_TX/RX
BT_nRST
BT antenna
GPIO
BKLT
LCD_RS/CS
LCD_D[7..0]
LCD_WR
Detect
Voltage
+
CN
CN
PDN
+12V
25MHz
Xtal
GPIO
Gigabit
3port
Switch
with PHY
RJ45 CON
To PC
10/100/1000BASE-T
P_0
P_5
P_1
PULSE
Trans
PULSE
Trans
DC/DC
+1.2V
VDD3.3V
DC/DC
PHY_INT
INT
Handset
HSSPOUT
HSMICIN
CN
+24V
+24V
3.3V_SDM
+3.3V
+5V
+3.3V
CN
PWM
SYMCLK
INT
MIC
Speaker
MIP/MIN
SPP/SPN
SPAMPEN
GPIO
D-AMP
GPIO
REG
+3.3VA
3.3V_FLM
voice
processor
UART(1)
UART2_TX/RX
GPIO
CD_nRST
AFE
+3.3V
+3.3V
+3.3VA
+3.3VA
ASIC
IC204
IC503
JK402
JK401
T403
T402
X401
IC402
JK301
IC506
IC103
JK101
JK201
JK202
CN501
IC501
IC502
X501
IC401
+3.3V
IC505
IC304
IC302
IC305
IC306
IC301
IC504
LED&KEY
Main PCB
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