DOWNLOAD Panasonic KX-UT113RU / KX-UT113RU-B / KX-UT123RU / KX-UT123RU-B (serv.man3) Service Manual ↓ Size: 2.49 MB | Pages: 93 in PDF or view online for FREE

Model
KX-UT113RU KX-UT113RU-B KX-UT123RU KX-UT123RU-B (serv.man3)
Pages
93
Size
2.49 MB
Type
PDF
Document
Service Manual
Brand
Device
PBX / SIP PHONE
File
kx-ut113ru-kx-ut113ru-b-kx-ut123ru-kx-ut123ru-b-sm.pdf
Date

Panasonic KX-UT113RU / KX-UT113RU-B / KX-UT123RU / KX-UT123RU-B (serv.man3) Service Manual ▷ View online

5
KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
3 Specifications
6
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
7
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.
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.
4.2.2.
Reset Circuit
Reset Signal is output from IC505 and input into IC501-pin L3.
8
KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
4.2.3.
Ethernet Circuit
The PHY IC (IC401) is used for the Ethernet interface.
It is connected from IC401 to the Ethernet port (JK401) through a transformer and so is  isolated.
Also, LAN port (JK402) gets power from the Ethernet line for PoE (Power over Ethernet) as shown below.
It is connected between IC401 and the BBIC (IC501) by high-speed bus called MII (Media Independent Interface) bus operating
with 25MHz.
Note:
UT113 does not have a PC port.
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