Main PCB is held down by 3 PH2 screws, we´ll remove those.

Front of the PCB has a 3-digit display and two switchy buttons. It´s powered with 26V AC voltage, meaning the PCB has to convert it to DC voltages useable by ICs and display.

PCB itself is not exactly clean, yet no corrosion is visible. Most of the dirt is uncleaned soldering flux from the factory.

The other side has most of the components, there are three prominent ICs and a large MOSFET.

IC1: 358,633

IC2: RSF100FCA, 1652KN400, Japan ( MCU 16-bit RL78 CISC 4KB Flash 24-Pin HWQFN EP, made by Renesas Electronics )

IC3: 9C733

Mosfet: GTAO6-600c GK00D VU, CHN, 742