Hi. everyone.
Recently, I have do some minidisc player's mainboard changing.
I have changed the mz-e720 to mz-e710 cause of I like the design
of MZ-E710 more than MZ-E720 and MZ-E720 has a HD digital amp.
First, I take apart the mainboard in 710 and 720 (Photo 1)
In this time my...