Technical Specifications:

• Module Type: Main CPU / Central Control Processor Board
• Processor Architecture: 8-bit or 16-bit microcontroller (varies by production revision)
• Input Interfaces: User panel buttons, water level pressure switch, temperature NTC sensor, door lock switch, foam detection sensor, imbalance sensor
• Output Interfaces: Motor inverter/triac drive, water inlet valves (hot + cold), drain pump, heater relay, detergent dispenser motor, door lock solenoid, buzzer
• Display Driver: LCD or LED segment display controller
• Communication: None (standalone — no WiFi or smart connectivity on this module)
• PCB Dimensions: Approximately 250 x 200 mm
• Operating Voltage: 5V DC (regulated on-board from 220V AC mains via SMPS section)
• Compliance: CE, RoHS, REACH, WEEE

Structural Features:

• Multi-layer PCB (4-layer typical) with dedicated power, ground, and signal planes
• SMPS (Switched Mode Power Supply) section converting 220V AC to 5V DC, 12V DC, and 3.3V DC rails
• Crystal oscillator (typically 8 MHz or 16 MHz) for MCU clock
• EEPROM chip storing program parameters and error logs
• Watchdog timer circuit for system reset on software hang
• Multiple connector sockets for harness connections (typically 4–6 connectors)

Material Composition:

• PCB: FR-4 TG150 (high-Tg glass epoxy)
• Solder: Lead-free SAC305
• Coating: Silicone conformal coating (high humidity resistance)
• Key ICs: MCU (Renesas or STMicroelectronics variant), EEPROM (ST or Microchip), Optocouplers (Sharp PC817 or equivalent), Voltage regulators (LM7805, LM7812 or switching regulators)
• Connectors: JST or Molex locking type

Working Principle:
Upon power-on, the MCU executes a bootloader sequence from internal flash memory. It reads the selected program from the user panel, then enters the main control loop. The MCU continuously monitors sensor inputs (water level, temperature, door status, imbalance) and adjusts outputs accordingly. For example: if the NTC sensor reads below target temperature, the MCU fires the triac to energize the heater via the relay. If the door lock switch opens during a cycle, the MCU triggers an error code and halts the cycle. All state changes are logged in the EEPROM for diagnostic retrieval.

Key Advantages:

• Single-board solution — integrates power supply, processing, and all I/O on one module
• EEPROM-based error logging — service technicians can read fault codes without external tools
• Silicone conformal coating — survives the harsh washing machine environment (heat, vibration, humidity)
• Genuine AEG part number — ensures full compatibility with Lavamat/ÖKOMix chassis

Applicable Industries / Use Cases:

• AEG Lavamat washing machine repair
• AEG ÖKOMix series servicing
• Professional appliance repair and diagnostics

Installation Requirements:

• Mains isolation is mandatory — disconnect 220V supply and wait 5 minutes (capacitor discharge)
• Label every connector before disconnecting — use masking tape and marker
• Install in the exact chassis position — mounting holes must align precisely
• After installation, perform a full program test cycle with empty drum
• If the display shows no response, check the harness connector to the display panel before replacing the CPU

Usage Notes:

• ESD-sensitive component — wear anti-static wrist strap during handling
• Do not replace with a non-genuine board — firmware mismatches cause error codes and improper operation
• If the EEPROM is corrupted (error code “E99” or similar), the board must be replaced — EEPROM is not user-rewritable
• Store in dry, temperature-controlled environment (15–25°C, <60% RH)