Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
med6753:
In on page 5000. Vacation (holiday) was great. I'm hopelessly behind. And I have nothing to say. :-DD
Saskia:
@mans
I may have an HDMI matrix thingies that I don't need.
in fact a passive and an active one. just have to find it.
I am still not past COVID, but when I am back on my feet I can have a look.
PN if interested pls.
Robert763:
--- Quote from: mnementh on July 03, 2022, 01:34:23 am ---WELCOME TO 5000!
--- Quote from: factory on July 02, 2022, 07:48:19 pm ---From the Agilent 54654N diagrams, that were linked to recently.
The monitor cable has three connections for +15V and ground, six total.
Three connections for the intensity pot.
Last four connections are half bright, full bright, HS (Hsync?) and VS (Vsync?).
Interesting the HS goes through a 74393 to provide the probe compensation signal.
HS & VS come from the big Jackal custom IC and the half bright, full bright from a PAL IC.
Other relevant pages have been cropped, rotated & added below.
This forum post suggest the Hsync is 19.72kHz and the Vsync is 60Hz.
https://www-elektronik-si.translate.goog/phpBB2/viewtopic.php?t=30373&postdays=0&postorder=asc&start=30&sid=c8ec2c01726d6cc1ee123fe5ebbe8c3d&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp
Guess I need to locate those on my 54615B, to try & narrow down where my intermittent horizontal roll problem is, but it's not the same board.
David
--- End quote ---
Okay, I've traced out the 54621D and the VCC, GND are in the same locations, plus Pin 10 dssig_grd is also tied directly to GND. However the BRIGHTNESS pot is not brought out to this header on the 54621D.
VSync HSync
My guess is that 13/14 are still the sync signals, and they have repurposed 7, 8, 9, 11, 12 for their greyscale scheme. 54645A agrees; trace 1 is the 54621D, trace 2 is the 54600A.
However, pin 8 is a different story; all I'm getting from the 54600A is noise. :wtf:
Then the light dawns; the pot isn't connected to the monitor PCB, duh. Then it occurs to me the voltages usually present on a brightness pot, so I connect the cable back in the 54600A and probe the pot. Yup... (-58V) sent out pin 9 to the pot. Without knowing how the 54621D does its greyscale, I'm not too sanguine about connecting that (-58V) back to its mainboard.
I think this is probably a good point to call it a night. ;)
mnem
:-BROKE
--- End quote ---
Hi Dwagon,
Did you see my posts
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg4275517/#msg4275517
and
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg4275556/#msg4275556
Looks like same video scheme as the 892x series a Gondbes 8220 video converter would be my next stop.
mansaxel:
--- Quote from: Brumby on July 03, 2022, 02:11:55 am ---
--- Quote from: bd139 on July 02, 2022, 02:59:13 pm ---
--- Quote from: Cerebus on July 02, 2022, 02:53:25 pm ---
--- Quote from: tggzzz on July 02, 2022, 01:43:44 pm ---Normally when I'm driving and see a BMW, I scowl.
--- End quote ---
Why? All the people who used to give BMWs a bad name have moved on to driving Audis and Range Rovers.
--- End quote ---
They’ve moved on from there too. They all drive Teslas now. Probably so there’s some plausible deniability about their driving being cunty.
--- End quote ---
Down under (from my experience) we still have the classic BMW "entitled", closely followed by the Mercedes crowd. Volvo drivers have evolved into an eclectic bunch - but you can generally identify driving habits from the model - the older tanks equate to "sedate" (somnambulistic) while the sportier versions are more likely to be quicker off the mark. Tesla drivers, however, have been somewhat normal - not that we have a great many to observe. Nevertheless, ANY vehicle with a white hat on the rear parcel shelf will be travelling at a speed that would allow someone to walk in front, waving a red lantern.
--- End quote ---
I drove 1h30 on the Autobahn yesterday evening. The Teslas are mostly absent; think I saw 2. That woulda been 20 in Sweden. Still Audi and BMW in the left lane. If I with my shooting brake (which by no means is slow, just a bit more conservatively driven) am left there too long, I will have a An Entitled Driver up my bum quite soon. And that will be an Audi.
It took all the way from Travemünde to Hamburg for the Swedish over-representation to subside; that what happens when an entire ferry-load of Volvos gets dumped on the Autobahn 226 at Kücknitz.
vk6zgo:
--- Quote from: mansaxel on July 03, 2022, 05:11:30 am ---
--- Quote from: Brumby on July 03, 2022, 02:11:55 am ---
--- Quote from: bd139 on July 02, 2022, 02:59:13 pm ---
--- Quote from: Cerebus on July 02, 2022, 02:53:25 pm ---
--- Quote from: tggzzz on July 02, 2022, 01:43:44 pm ---Normally when I'm driving and see a BMW, I scowl.
--- End quote ---
Why? All the people who used to give BMWs a bad name have moved on to driving Audis and Range Rovers.
--- End quote ---
They’ve moved on from there too. They all drive Teslas now. Probably so there’s some plausible deniability about their driving being cunty.
--- End quote ---
Down under (from my experience) we still have the classic BMW "entitled", closely followed by the Mercedes crowd. Volvo drivers have evolved into an eclectic bunch - but you can generally identify driving habits from the model - the older tanks equate to "sedate" (somnambulistic) while the sportier versions are more likely to be quicker off the mark. Tesla drivers, however, have been somewhat normal - not that we have a great many to observe. Nevertheless, ANY vehicle with a white hat on the rear parcel shelf will be travelling at a speed that would allow someone to walk in front, waving a red lantern.
--- End quote ---
I drove 1h30 on the Autobahn yesterday evening. The Teslas are mostly absent; think I saw 2. That woulda been 20 in Sweden. Still Audi and BMW in the left lane. If I with my shooting brake (which by no means is slow, just a bit more conservatively driven) am left there too long, I will have a An Entitled Driver up my bum quite soon. And that will be an Audi.
It took all the way from Travemünde to Hamburg for the Swedish over-representation to subside; that what happens when an entire ferry-load of Volvos gets dumped on the Autobahn 226 at Kücknitz.
--- End quote ---
Yonks ago, I remember driving a 100E Ford Popular back from London to Southampton on the M3.
Back in those days, the Poms were well into tailgating, with the worst offenders being "chaps driving Jaguars".
Downright terrifying, with the poor old "Pop" screaming its guts out, and a Jag bonnet emblem seemingly in the back seat.
Tailgating was not rare in Oz at the time, but I was surprised how 1970s Brits made an artform of it!
"Culture shock", I guess!
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version