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The device shown above is used to visualize the electrical defects, shorts or opens, on circuit cards.
English (United States)
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Defect Visualization in a Printed Circuit Network
The device shown above is used to visualize the electrical defects, shorts or
opens, on circuit cards.
A reference printed circuit card 1 without any components is placed in an
electrolytic bath in a plastic container 2. The printed circuit surface is arranged in
a parallel direction to an aluminum sheet 3 located in the bottom part of the
container 2. The aluminum sheet is connected to positive electrode 4, and a
movable negative electrode 5 is applied to a known point of the network to be
Network visualization is obtained by bubbles in a soap-salted solution or
colored deposit in a chemical bath. The virtual image of this revealed network is
superimposed upon the circuit to be analyzed by optical system 7. If there is an
open circuit, the operator now can check the continuity with an ohmeter. If there
is a short, the second network is superimposed in the same way and the operator
can check with accuracy all the adjacent points of the different networks.
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