Original Toshiba Inverter Split AC Indoor PCB Board with PCB number MCC-5045-03, transformer code SWT-77, and marking 28Y5ZTT3. This indoor main control PCB is designed for Toshiba inverter split air conditioners and controls indoor unit functions such as fan motor, temperature sensing, communication, and overall system operation. Suitable for replacement of damaged or faulty indoor PCB boards after compatibility verification. The board markings indicate it includes an 8V power section.