Point Nix 3d Combi 500 no voltage on the CN14 connector
Another repair the positioning and focusing block of the tomograph Pointnix 3d combi 500.
If the Pointnix 3d combi 500 tomograph does not have AC voltage on the CN14 connector on the circuit board of the positioning and focusing block, you need to do the following.
Check the serviceability of the U5, TL494 chip, with a multimeter at the limit of 2000. Regarding the 7 leg (housing). The microcircuit is on the bottom side of the board in an SMD package.
Check the health of the field MOSFET transistors Q1, Q2 - IRF640. If the transistors are pierced, replace the transistors and snubber C31, C32 with a nominal value of 0.01 ?F with an operating voltage of at least 100V. In the photo, the elements to be checked are highlighted in white.
Tl494. Testing resistance digital tester at the limit of 2000 ohms.
In the photo, the elements to be checked are highlighted in white.
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