Electronics > Repair
Tektronix TCP202 current probe repair - Schematic and suggestions needed
iso14000:
Hi all, I'm not very active on this forum, far much on a french one, but global level forbid me to post my request on it.
sorry to rise up this topic (and my bad english)
I've just bough a used TCP202 as defective on 3bay for a buntch of euro, and indeed it is in failure...
nothing looks fried into that, the global behaviour is ... an oscillator.
does somebody have a schematic to dig into?
best regards
iso14000:
so ridiculous I am... schematics are simply above.... :-DD
iso14000:
Hi,
I found some difference with VTP's schematics. (thanks sir , your work is awesome!)
by taking two pictures and precisely match them with Gimp , I redraw the schematics.
In my case , a 10 \$\Omega\$ resistor was out of specs , and was glowing in the dark, I chase it with my IR camera.
By changing it, global behaviour is OK.
there are still some mysteries for me :
-what stands for X2 et X1 , they are SOT23 with "28" marking.?
-what is the purpose of T7 et T4?
I cannot see the oscillator activated when I push the degauss button
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