This player is actually a Samsung based unit that uses a Sony laser pick-up (KHS-130A).
I had both the Samsung, DV5100 & DV5000 in my possession for awhile and ended up recycling both once I knew they had a Sony pick-up. They definitely appear to be made by Samsung as it has a very unique loading tray that I never saw in another player design.
Since your player can still play discs, it would be worth fixing. Sounds like an alignment issue but maybe something simple like dried up grease where the skipping occurs. Can you verify if it will play a CD properly?
Here are images of the 5100 I had....