Panasonic KX-UT113RU / KX-UT113RU-B / KX-UT123RU / KX-UT123RU-B (serv.man3) Service Manual ▷ View online
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KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
2.1.1.
Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
2.2.
Discarding of P. C. Board
When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.
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KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
3 Specifications
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KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-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
LED
KEY
JK202
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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KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
4.2.
Circuit Operations
4.2.1.
LCD Circuit
LCD data are output from pin M3 of IC501 to LCD module.
LCD contrast is set by electronic volume in LCD module.
+3.3V of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving voltage
(approx. 10.0V).
The driving voltage is observed between Pin 12 (V0) and Pin 13(XV0) of CN504.
LCD contrast is set by electronic volume in LCD module.
+3.3V of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving voltage
(approx. 10.0V).
The driving voltage is observed between Pin 12 (V0) and Pin 13(XV0) of CN504.
The lighting of the backlight is controlled by Q503(KX-UT123 only).
The PWM (Pulse Width Modulation) signal is output from IC501-B8 pin and the brightness is changed according to its duty ratio.
The PWM (Pulse Width Modulation) signal is output from IC501-B8 pin and the brightness is changed according to its duty ratio.
4.2.2.
Reset Circuit
Reset Signal is output from IC505 and input into IC501-pin L3.
