The type CPU TMPB7PS38N-1P08, memory block AT24C16, chip TB1238, their fault because the I2C-bus data errors. Overhaul method is: (1) in 12 channel Xia will volume adjustable to minimum, then by "Mute" key, can entered maintenance State, at screen right Shang angle appeared "d" symbols; (2) by "↑ ↓" adjustment project, by "→" key adjustment numerical; (3) will adjustment project "VM2" set for "34", remote control shut machine, that exit maintenance State, General can excluded fault. If still cannot use the curtain features, it should be replaced with the same type of memory.