KX-MB2110RUW, KX-MB2130RUW, KX-MB2170RUW, KX-MB2117RUB, KX-MB2137RUB, KX-MB2177RUB - Panasonic Copying Equipment Service Manual (repair manual). Page 21

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KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
6.2.
General Block Diagram
MAIN Board
SOC (IC300)
This custom IC is used for general MFP operations.
ROM (IC402)
This FLASH ROM contains all of the program instructions on the unit operations.
And support the backup of user setting and FAX receive data.
Synchronous Dynamic RAM (IC400/IC401) (KX-MB21*7 : 128MB, Others: 64MB)
SDRAM is used for CPU work and receiving memory and page memory.
POWER SUPPLY
DC-DC converters generate 3.3V and 1.2V for system power.
Regulator generates 5V for system power.
Regulator generates 2.5V for IC500 power (KX-MB21*7  ONLY).
TEL/FAX I/F
Composed of ITS circuit and NCU circuit.
Analog DAA (Direct Access Arrangement) and two AFE (Analog Front End) ICs control Telephone line,
Speaker and Handset.
ASIC(SPT,IC500) (KX-MB21*7 ONLY)
This custom IC is used for laser control. 
Wireless LAN module(IC850) (KX-MB217* ONLY)
Apply to IEEE802.11b/g/n.
READ Section
CIS Unit to read transmitted documents.
Scan data is converted by AFE(IC503).
Motor
This model has 1 DC motor and 2 stepping motors.
IC300 drives the DC motor for printing. 
IC600 drives the stepping motor for CIS carriage.
IC700 drives the stepping motor for Auto Document Feeder motor.
LSU
Forms the images on the OPC DRUM by rotating polygon motor and reflecting the laser beam against polygon.
Sensors
This model has 7 sensors, and has 1 switch (with Handset model only).
Low Voltage Power Supply Board (SMPS Board)
Supplies +24V and +12V to the Main unit and controls the Heat Lamp.
High Voltage Power Supply Board (HVPS Board)
Supplies bias need for the printing operation: bias of the DRUM, Developing and Transcription.
Fuser Unit
Composed heat lamp, thermistor and thermostats.
FAN MOTOR
FAN motor cool down Fuse Unit.
Solenoid
This model has 2 solenoids and 2 clutches for printing.
1)
CPU
ARM9 operating at 250MHz.
2)
SDRAM Controller
Controls SDRAM Memory.
3)
USB Controller with PHY
ch1:USB device (Apply to USB2.0HS)
ch2:USB host (Interface with WLAN IC) (KX-MB217* ONLY)
4)
Scanner I/F
Controls the CIS and AFE, and process the scan images.
5)
LSU I/F
Controls the polygon motor and outputs the VIDEO signal to LSU.
6)
MOTOR I/F
Controls DC motor and Stepping motor.
7)
FAN I/F
Controls FAN MOTOR and detect the rotation of FAN MOTOR.
8)
OPERATION PANEL I/F
Serial interface with Operation Panel.
9)
SENSOR I/F
Detects the sensor signal.
10) I/O PORT
I/O Port Interface.
11)
A/D, D/A converter
Sends beep tones, etc.
Convert the analog signal to the digital signal.
12) RTC
Real time clock. 
13) MODEM
Performs the modulation and the demodulation for FAX communication. 
14) Analog Front End I/F
Controls the DAA device for TEL/FAX function. 
15) LAN Controller
Ethernet control.
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