Re: Help Tektronix 466 repair advice
Yep. A missing voltage in the PSU is usually one of the easiest faults to find. Let's hope that that's the only problem.
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Re: Help Tektronix 466 repair advice
Hey everyone,
First off I LOVE TEST POINTS that made it so easy!
So here are my results for test points
Expected Result
+65v +65.12v
+15v +15.05v
+5v +5v
-8V +0.71v
-15v -15.18v
+140v +139.80v
So it appears the -8V is where we start hunting!Leave a comment:
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Re: Help Tektronix 466 repair advice
Thanks all for your response.
I get nothing when following those steps.
However now when i turn it off and on i see a flash of light for a second that appears it could be the trace line.
If i turn it off and on really fast and turn the focus it has an effect so i believe the focus might be working,Leave a comment:
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Re: Help Tektronix 466 repair advice
Start from scratch by following the setup for "Normal sweep display" as per page 2-10 of the manual you linked to, although with the following changes:-
Set CH1 volts/div outer knob fully anticlockwise (to 5v/div).
Set "inten" fully clockwise.
Do not connect anything to any of the BNC connectors, we only want to find a straight line at this point.
The reason you are seeing green splodges on your screen is because it is a storage scope. It doesn't actually prove that the tube is working as it should.Leave a comment:
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Re: Help Tektronix 466 repair advice
i dont believe so however i will double check just putting the kids to bed.
From memory it works for a few split seconds while the green is fadding away as in the demo video (youtube link)
also the correct manual link is here
Leave a comment:
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Re: Help Tektronix 466 repair advice
Does the Focus pot have any affect?Leave a comment:
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Help Tektronix 466 repair advice
Hey everyone, i am getting into electronics and have been toying with them for the last 8 months.
I have repaired 3 CRT arcade monitors thus far so by basic recapping and fault finding,
However i am alittle stumped as to where to start with this.
I brought it to learn how they work and gain some experience however i think it is broken i have taken a video of its symptoms if someone can point me in the right direction that would be fantastic, i pulled it apart to have a quick look and this thing has caps that are massive!
https://www.youtube.com/watch?v=VDjKbOhsFks
The Manual is here.
http://www.ko4bb.com/manuals/index.p...5_Oscilloscope
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Hi everyone,
Looking for some advice or opinions on what to do with a monitor issue I’ve run into. Apologies in advance is this crossovers a few forum categories.
I have a Dell U3425WE, which I've recently replaced with another model. That said, the original unit is still fully functional in terms of the display — it works perfectly over HDMI and DisplayPort. However, the USB-C and Thunderbolt 4 ports have stopped functioning correctly. The Issue:- The 90W Thunderbolt 4 port (circled in the photo) no longer charges or powers any device, including laptops or MacBooks.
- There’s
07-15-2025, 04:55 AM -
Hi, Im looking to replace some EMP21N03 mosfets on an Alienware motherboard, but I'm having trouble finding a legit supplier. The ones that are available from China have pictures with the engraved logo looking very scratchy and sketchy. Nobody in the US sells them. I'm trying to find a compatible mosfet, but I'm not well versed enough to be confident im making the right choice. Does anyone have a suggestion or advice that could help me find the right mosfet? Thanks!
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Hi all,
Recently installed a new motherboard but during the process I seemed to have damaged my Gigabyte Eagle 3060 Ti card.
My motherboard ROG STRIX B550-A is detecting an issue with the VGA (light ON)
I have attached 2 photo's of my GPU board, one above and the other is what I believe to be the 5V - as you can see, this has visual damage so looks suspicious to me.
If I replace this part what are the odds this will resolve the issue? - any additional information on where to source the parts would be much apricated too!
This is...05-10-2025, 04:25 AM -
I bought this Chinese made step up transformer to run some 220v appliances. Some of the wires were brittle and broke off. I attempted to improve some of the wiring with spade terminals and heatshrink tubing as the wires were just soldered straight to the connectors. Any advice on how to rewire the broken wires on this step up transformer? I'm unsure how to go about rewiring this to a better safe working condition. -
I'm working on an a1707 macbook pro for a friend of mine that said it had stopped working and will not turn back on. After opening up the laptop I discovered a short on C7382 which took the PPBUS_HS_CPU to gorund.
After fixing the cap issue, I had 12.6 volts on the line. Not sure what or when something happened, but I am now getting 3.6 to 3.8 volts fluctuating. I was taking some volt readings and I'm not sure if I shorted something or if something else has happened.
At this point, I'm not sure where to start looking for something to fix. Maybe the cpu fried anyway when the PPBUS_HS_CPU...10-12-2024, 04:55 PM
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