Why is my Applied Biosystems 3500 polymer delivery pump so noisy?
- MMichael MosleyJul 28, 2025
The polymer delivery pump (PDP) may be excessively noisy due to a couple of reasons. First, the array locking lever might not be in the correct position. Ensure it is locked correctly; if not, contact Thermo Fisher Scientific. Second, the polymer delivery pump block may not be pushed back into position after a capillary array change. Gently push the buffer-pin valve lever (yoke). If it doesn't move freely, restart the instrument and computer. If, after restarting, the lever still doesn't move freely, contact Thermo Fisher Scientific. Otherwise, push the upper polymer block all the way back against the wall.


