DAM 1021 problem Low sound from one channel while connected with XLR output

I am using DAM1021 for last 3 years. It was working well. The DAC is connected with RPI4 through I2S interface. Recently I changed the PSU of RPI4. Now left channel of XLR output is giving low sound than right channel of XLR. The sound through RCA (buffered and raw) is perfectly okay. I checked the connection thoroughly, checked the cable and preamp, there is no problem. I am using Parasound Halo A21 with P5 preamp. Both the speakers Tannoy Cheviot is okay as well. Can someone please help.