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Random piece fell out of Tektronix 2445 while replacing front panel
I recently bought a Tektronix 2445 with a cracked front panel, so I ordered a replacement panel (101-0082-00). While taking apart the panel I noticed that a small piece (it appeared to be thin piece of metal) fell out and got lost on my carpet. I put the scope back together with the new front panel, and I installed the two transparent plastic panels (the clear one and the blue one) that go in front of the CRT. It's working fine but I am wondering what the piece I lost is for. I looked at the 2445 service manual and the exploded views don't show any sort of metal piece. If anyone has any idea of what the piece is let me know.