Re: Help Tektronix 466 repair advice
Hey Everyone,
Post was slow, i finished my HV probe it worked perfectly.
I did a test before i took the measurements on a lower voltage to ensure the
divider worked and it did!.
Sure enough on reduced scan i am getting my near normal operating voltages and on
normal i am getting well below.
-----------------Expected-------------------------------------
TP1501 -3010 Reduced Scan
TP1501 -1470 Full scan
------------------RESULT-------------------------------------...
epicfatigue
Senior Member
Last Activity: 05-22-2014, 07:42 AM
Joined: 12-01-2011
Location:
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Re: Help Tektronix 466 repair advice
Thanks all,
Its good to know i am not wasting my time, everything in life i learn thus far has been from the ground up and i have always came out better for it.
Once i have the unit working i was going to buy a signal generator to recal it myself.
Iv joined the Tek group just need some better equipment i am waiting on some resistors in the mail to build my HV probe,
Just a simple voltage divider.
While i was waiting i have been building my variable Power supply,
...Leave a comment:
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Re: Help Tektronix 466 repair advice
Yeah i know i called them they had nothing to say about the model,
i am currently waiting for my HV probe to come, once that arrives i will be able to check that side of things because i believe that is where the problem is lying at the moment....Leave a comment:
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Re: Help Tektronix 466 repair advice
Kirakos please keep the thread crapping to a pm mate.
Wanna get this thing fixed not turn it into a war between people.
Hurling abuse at someone you cant wrap your hands around is a waste of time. I understand this will throw it out of calibration but once its working my work has one i can use to re adjust it, however no one there knows how to use it.
Anything you can contribute is a big help and i do take everything on board, and it is all appreciated. If i didn't have a family to...Leave a comment:
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hey Tom thanks for your reply,
Yes i have tryed the default settings and not luck.
As per the video when i press the beam finder i get nothing.
But if i pull out the intensity knob (reduced scan) i get a beam.Leave a comment:
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Re: Help Tektronix 466 repair advice
that was devastating to hear, sadly no one out here repairs them, and i do not have the money to buy another i will have to put in the hard yards.
I have noticed it almost seems like the beem is being deflected.
[url]https://www.youtube.com/watch?v=tXx0g8OF3QI[/url]Re: Help Tektronix 466 repair advice... like the beemLeave a comment:
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Re: Help Tektronix 466 repair advice
well that was short lived was playing with it testing it, pressed the store button, now i have lost the trace again....
checked the psu everything checks out...
All the voltages are there guess something died further
Any subjections ?Leave a comment:
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Re: Help Tektronix 466 repair advice
She lives bad op amp and transistor!...Leave a comment:
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Re: Help Tektronix 466 repair advice
okay so i finally found the correct diagram,
Layout is Page 275
And Power Supply & distraction page 292
I have highlighted all the components and i am going to remove them 1 by 1 and test them there is only a total of 17 components
3 transistors
5 capacitors
7 resistors
1 VR resistor
1 op amp
Was thinking about testing them in that order....Leave a comment:
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Re: Help Tektronix 466 repair advice
I hope so!
any idea where to start looking.
iv joined the Yahoo groups and posted my findings there...Leave a comment:
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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
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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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!
[URL="https://www.youtube.com/watch?v=VDjKbOhsFks"]https://www.youtube.com/watch?v=VDjKbOhsFks[/URL]... -
Re: 42inch Touch Screen wont power on
Sorry guys i have been away on business and just got back got the resistor and going to try it tonight.
If the power supply operates correctly which i think it will, how can i go about identifying what this main board is so i can seek a replacement ?
As i have tryed to google to numbers on it and returned no results.
Thanks Guys...Leave a comment:
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Re: 42inch Touch Screen wont power on
Hey i live near a Jaycar so i can get anything electrical they stock just about anything
using this to short ?...
Leave a comment:
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Re: 42inch Touch Screen wont power on
ON the main board i followed the power button switch and it has 4.49 volts and drops to 0v when pressed. However on the opposite side where pin10 (on the power supply) connected to the main board we are seeing no 0v drop.
Does this determine there is a fault with the main board? is there a way i can short pin 10 to see if the power supply fires up to indeed confirm this theory?
Would you like pictures of the main board?Leave a comment:
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Re: 42inch Touch Screen wont power on
This is located on the Powersuply IC101 located behind small transformer parallell with the large transformer. inbetween lrage heatsincs....Leave a comment:
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Re: 42inch Touch Screen wont power on
Sorry guys i did this with the cables pulled out because i thought when the relay clicked it would turn the power off...
i redid all the tests and the volts are slightly diffirent
CN04
1 2.6mv
2 5v
3 0.53v
4 0
5 0
6 0
7 .5v
8 .5v
9 5.24 v
10 4.49v
I tested for volatage drop on pin 10 when pushing on off no change voltage stayed solid.
CN03
1 4.2mv
...Leave a comment:
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Re: 42inch Touch Screen wont power on
okay guys sorry re tested everything, found some unusal results to say the least.
CN04
1 0
2 -351.7 mv
3 -351.7 mv
4 0
5 0
6 0
7 -349mv
8 -349mv
9 5.24 v
10 2.94v
However with the power off doing a continuity test and touching a common ground pins 1-8 all show as a ground????
CN03
1 4.2mv
25.2mv
CN06
1 7mv
2 4.2mv
3 Blank...Leave a comment:
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