Technical Specifications:

• Part Number: AS-MEEP-000
• Type: Main Control PCB (Main Board)
• Microcontroller: 32-bit ARM Cortex-M series MCU
• Operating Voltage: 3.3V DC (logic), 5V DC (sensors), 230V AC (triac outputs)
• Communication Interfaces: I²C, SPI, UART, CAN bus (where applicable)
• Input Channels: Temperature sensors (NTC × 3), pressure switch, door lock sensor, water level sensor, tachometer
• Output Channels: Triac-driven motor speed control, solenoid valve drivers (×2), drain pump relay, heater relay, door lock actuator
• PCB Dimensions: Approx. 280 mm × 220 mm × 25 mm
• Operating Temperature Range: -10°C to +70°C
• Conformal Coating: Yes (moisture and dust protection)
• EMC Compliance: EN 55014-1, EN 55014-2, EN 61000-3-2, EN 61000-3-3

Functional Features:

• Full cycle management: Controls all wash, rinse, spin, and dry phases autonomously.
• Inverter motor control: PWM-based variable frequency drive for brushless DC or EC motors.
• AutoSense integration: Receives turbidity sensor data to adjust water level, temperature, and time.
• AutoDose compatibility: Communicates with detergent dosing pump for automated dispensing.
• Fault diagnostics: Stores error codes in non-volatile memory (EEPROM) for service diagnostics.
• SoftWater interface: Controls built-in water softener regeneration cycle.
• Child lock and delay start functions managed via UI input processing.
• WiFi/Smart connectivity module interface (on connected models) via UART/SPI.

Material Composition:

• PCB Substrate: FR-4 glass-fiber epoxy laminate (Tg 170°C)
• Copper Trace Weight: 2 oz (70 µm)
• Solder Mask: Green LPI (Liquid Photoimageable) solder mask
• Surface Finish: HASL (Hot Air Solder Leveling) or ENIG
• Connectors: Molex or JST branded connectors with locking mechanisms
• Potting Compound: Silicone gel on high-voltage sections

Structural Features:

• Multi-layer PCB (4–6 layers) with dedicated power, ground, and signal planes.
• Isolation barriers between high-voltage (230V) and low-voltage (3.3V/5V) sections.
• DIN rail or screw-mount bracket for secure attachment inside the machine chassis.
• Water-resistant connector housings with O-ring seals.

Working Principle:
The ARM Cortex-M microcontroller executes the wash program firmware stored in on-board flash memory (typically 512 KB–1 MB). It reads inputs from NTC temperature sensors (drum water, heater, ambient), a pressure switch (water level detection), a tachometer (drum speed), and the door interlock switch. Based on the selected program and sensor feedback, it outputs PWM signals to the inverter motor driver, triggers triacs for the heater and water valves, and activates the drain pump relay. The CAN bus or UART interface communicates with sub-modules (display panel, dosing pump, WiFi module). All operational data and fault codes are logged in EEPROM for service retrieval.

Advantages & Highlights:

• Centralized control architecture — single board manages all machine functions.
• ARM Cortex-M processor ensures fast, reliable real-time control.
• EEPROM fault logging enables precise service diagnostics.
• Conformal coating provides protection against humidity and detergent splash.
• Fully programmable — firmware can be updated via service tools.

Applicable Industries / Use Cases:

• Washing machine and dryer manufacturing (OEM)
• Appliance repair and servicing
• Electronics component supply chain

Installation Requirements:

• Install in the designated control cavity of the washing machine/dryer chassis.
• Connect all ribbon cables, wire harnesses, and connector plugs per wiring diagram.
• Ensure proper grounding of the PCB mounting bracket.
• Verify all connector locks are fully engaged before closing the machine.
• Perform a full function test after installation before delivering to the customer.

Usage Precautions:

• Handle the PCB by its edges only — do not touch component contacts or solder joints.
• Use an ESD wrist strap during installation to prevent static damage to the MCU.
• Do not install in an environment with excessive vibration or moisture beyond the rated IP protection.
• If replacing, ensure the firmware version matches the machine model; reflash if necessary using AEG service software.
• Store in an anti-static bag in a dry environment at 15–35°C.