Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
<< < (24995/27437) > >>
bitseeker:

--- Quote from: AnalogueLove1867 on July 02, 2022, 11:35:25 pm ---TEA...
Transversely Excited Atmospheric
LASER!
https://en.wikipedia.org/wiki/TEA_laser

Sorry, couldn't help myself  ;D

--- End quote ---

Wow, didn't know about that form of TEA. :-+
vk6zgo:

--- Quote from: Peter_O on July 02, 2022, 06:30:03 pm ---I will not drive to Berlin Steglitz, no I will not   :scared:



https://www.ebay-kleinanzeigen.de/s-anzeige/hewlett-packard-kepco-uher-etc-/2146996418-168-3415

--- End quote ---

I would, but the Camry doesn't do so good on water! ;D
mnementh:

--- Quote from: AnalogueLove1867 on July 02, 2022, 11:35:25 pm ---TEA...
Transversely Excited Atmospheric
LASER!
https://en.wikipedia.org/wiki/TEA_laser




Sorry, couldn't help myself  ;D
--- End quote ---

I just love some folks' idea of "easy".  :-DD

mnem
*punt*
vk6zgo:

--- Quote from: mnementh on July 02, 2022, 09:11:57 pm ---
--- Quote from: Vince on July 02, 2022, 07:29:06 pm ---
--- Quote from: mnementh on July 02, 2022, 06:43:40 pm ---

Why the fuck didn't I look closer and notice this immediately?   

Added to the dispute.  ::)

mnem
 :-BROKE

--- End quote ---

Ah, well.... that's gonna be more difficult to fix than a circuit board for sure... but not all hope is lost ! I mean you just bragged about how good your other half was at sucking, maybe she can bring the vacuum back into this CRT ?!  :-//

No, I did NOT just say this, wasn't me officer !!!!   :scared:
--- End quote ---



   BWAHAHAHAHA!!!

mnem
I should tell her you said that... and give her your address. >:D

--- End quote ---

Vince would have to wait till after she finished belting your scaly arse!
mnementh:
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
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod