Hi. Recently I bought a used tascam porta two. It should be noted that I'm currently running it on batteries. While testing with my cassettes, I noticed these things: -While listening from headphones output and remix mode, I can only hear right side, however there is a very quiet signal on the left (could not confirm if it's from the left bus). -While listening from headphones output on cue mode, sound just comes in mono. (I think it might be how it's supposed to work) -While listening from line out, strangely right channel comes to both sides, but when I pan it all left, there is a quiet signal on the left side and no sound on right side. This only happens when all channels hard panned to left. I checked the manual however I could not understand what I'm doing wrong. And if it's a malfunction, i'd like to know if a fix is possible. Appreciate if anyone could help!