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James, If you can find L4096 on the A10 board, near C4096, and unsolder one side, that will isolate the 5V supply to A10. See the power distribution diagram. Roger

Hi David. If you mean from the test points, then I have been doing that. The 5v and 15v read 6Ω and 14Ω respectively. The 15v rail goes up to 15Ω when J1731 is disconnected. If all the

It's kind of hard to tell from the video, but it looks to me that you have B sweep, but no A sweep. The two sweep hybrids are interchangeable, did you try swapping them? [email protected]> wrote:

""Nearby lightning can induce voltage spikes, as can a car hitting a telephone or a squirrel shorting out the terminals on an electrical transformer." Lightning; yes, squirrels; yes, cars hitting

I think I have a mental block going on. Too much time staring at the same several hundred components perhaps? Obviously not all the caps are on the 5v rail, so as I test across the caps, short of

Hi, for those interested, I have upload the PDF of my repair exercise in the file "Repair Tek 2430A NVRAMs.pdf" available in the file section. Christophe

Hello Leo, Thank you for your recommendations. I was finally able to put the scope in XY mode and I agree that it is kind of weird to make the time-base switch meet the XY position. But I did it and

Nice one for the clarification on the testing. I'll go and have another probe around. The PSU does limit the current, and it is set at 1 amp. The biggest problem is trying to figure out which

Interleaved: In that case, you will need to replace any possible destroyed parts and destroyed tracks.? It's not recommended. The idea behind the current limited supply (and it's a external lab

(Edit) Hi again Harvey. "If you can, run the 5 volts from a current limited supply (assuming 5 volts is bad), and then look at voltage drops across parts, mostly capacitors. Lowest voltage drop

This thread got me thinking about whether I had any RIFA bombs lurking. Not wanting to open every instrument, I started my search on the web - looking for a list of known-bad instruments. It appears

Have not found rules for posting Tek items for sale. Would someone mind letting me know ? Much appreciated ! Thank You. Michael

The power dissipated by the wet paper is nearly four times as much for 230 V (*) as for 120 V. So you’ll have a runaway much sooner. But the problem does exist at 120 V as well, so don’t get too

Hello, Your movie strongly suggests the deflection is working perfectly and you have a time base issue. I would check and clean the time base switch first. Leo

The following files and folders have been uploaded to the Files area of the [email protected] group. * /IMG_4793.MOV ( /g/TekScopes/files/IMG_4793.MOV ) *By:* clunche

Good morning, Yes, X-Y mode is a bit weirdly done on the 2465. Put the time base knob all CCW to XY; This way the NOT enabled Ch1 will become the horizontal X input, If you select(enable) Ch2, that

Hello gents, I made additional observations this morning. When cold-started, the display shows all the readouts ok but the trace is stuck on the left side doing nothing, except if I turn the

Hello: Seems some confusion of self healing caps vs RIFA failure issues. My understanding: ..... 1/ "self healing" applies to certain metalized film caps: where failed dielectric spot burns away

That hunker.com item is interesting, but not very technical. And to be frank I'm not sure I trust them when they write: "Nearby lightning can induce voltage spikes, as can a car hitting a telephone

ok a 7400 series chip will draw some current when properly biased, that is, the VCC is plus, and the GND is minus.? This current is drawn by the transistors inside, and is voltage dependent.? Once