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Test Equipment Anonymous (TEA) group therapy thread
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m k:

--- Quote from: mnementh on July 02, 2022, 05:02:06 pm ---
--- Quote from: m k on July 02, 2022, 04:24:57 pm ---
--- Quote from: mnementh on July 02, 2022, 04:08:13 pm ---
--- Quote from: factory on July 02, 2022, 02:05:50 pm ---
--- Quote from: mnementh on July 02, 2022, 03:05:23 am ---Uggghhh...

Okies... anybody got any tech ref on the monitors used in these HP scopes? I understand the difference between the two implementations is the 54621D and family use 32-grayscale palette, while the 54600A and family use a 2-grayscale palette.

54645A/54600A use HP 2090-0316/DataRay CDM-7SF191, the 54621D uses HP 2090-0384/DataRay CDM-7SX191. My searches in the available HP SMs and on the internet turned up bupkis.

Before I go guessing based on poking around with my scope, does anybody here have actual pinouts and or schematic for these monitors?

Tomorrow I figured I'd start looking at the  CLIP package from the 54645A and see what I can find there. Maybe lookit the video chip on each and see if I can find some datasheets.  :-//

mnem
 :=\

--- End quote ---

I'm would be surprized if they aren't interchangeable, they look to be standard bought-in monochrome monitors to me, the different greyscaling would be something done in the video processing, on the mainboard and the output just a video signal.
Certainly I saw the video signal on the diagrams for the 54645A, that was posted a few weeks back. I think the other connections are power (+15V?), an external pot for brightness, can't remember what else there is. The chip on the Hitachi CDM-7SF191 board in my 54615B is a uPC1379C, this is a sync signal processor IC intended for small B/W & color TVs and does the vertical & horizontal stuff, that is done by more discrete parts on the earlier scope displays (the only one that a diagram seems available for).David
--- End quote ---

Yeeah, I'm not sure. IIRC, these are actually a TTL digital input monitor, so not that simple. I need to do some research.  :-+

mnem
 :-/O

--- End quote ---

Neck board has an added 74S03, so maybe 16 new shades of gray.

CNC industry have had small screens for quite some time.
Possibly already have an almost ready replacement LCD.
--- End quote ---

Yeah, ages ago we had a similar discussion; there was another member who was quite knowledgeable about these small-frame industrial monitors and even suggested some possible LCD substitutes. I don't know where to even begin looking for that.

mnem
 :-//

--- End quote ---

Sharp was a big player but can't remember they ever really did complete sets.

OmniVision and Industrial Panels popped up but probably for reference only.

7" seems to be a bid difficult size.
Panels are either slow or wide, or both.
What kind of monitors those fancy apartment security panels have?

So the 74S03 was the opposite, TTL thing and transistor version possibly more analog.
Since uPC is a sync separator my guess is that even if it is missing its function is still most likely there and scope connection unchanged.

Have you tried old TV?
Even if it doesn't sync you may still see something else than snow.
m k:

--- Quote from: Vince on July 02, 2022, 10:55:07 am ---
--- Quote from: Specmaster on July 02, 2022, 10:46:29 am ---

Seen today on Ebay UK, anybody requiring a 50Mhz LA, starting bid of only £15...

https://www.ebay.co.uk/itm/255609408885
WTF is this?

--- End quote ---

Well it's pretty obvious, it's some kind of screen saver, to protect the precious CRT !  8)

--- End quote ---

Of course, but frame clearly needs some Quick N Brite.
Cubdriver:

--- Quote from: Cubdriver on June 25, 2022, 04:42:18 am ---
--- Quote from: factory on June 23, 2022, 08:08:51 pm ---Interesting & slightly badly listed vintage DVM for those in the USA, cheap start price but could be expensive as it has a reserve.  :-//
https://www.ebay.com/itm/295045755315



David

--- End quote ---

I took a crack at it, but the reserve was higher than my bid.  Oh well - I have too many projects already!

-Pat

--- End quote ---

I just looked at eBuy to follow up on this, as he’d relisted it again with the same $12ish starting bid.  This time it sold - for the reserve - $150!  It’s a cool little meter, but not *that* cool, IMO.  Hope it’s going to a good home; suspect it likely is given what was paid for it.

-Pat
Vince:

--- Quote from: Peter_O on July 02, 2022, 06:30:03 pm ---

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

I will not drive to Berlin Steglitz, no I will not   :scared:

--- End quote ---

Yes you will drive, yes you will drive....

That said, we don't know how cool this stuff is until we know how much he wants for it  :-\

I mean the ad says : " Preise auf Anfrage! "

Now my German is more than rusty, but doesn't that mean " Price no Request " ?

So it's not like he was selling the entire lot for a bag of crisps... you buy one TE at a time and hope he is not too greedy.
So could get very expensive real fast...  :palm:

Still, worth picking 2 or 3 of your most preferred items I guess...

Have a good trip !  >:D

I am quite interested in what looks like an old A3 format HP Plotter...


Vince:

--- Quote from: mnementh on July 02, 2022, 06:43:40 pm ---
--- Quote from: mnementh on July 01, 2022, 10:33:47 pm ---
--- Quote from: Specmaster on July 01, 2022, 09:49:13 pm ---Am I missing something here, to me, it is exactly as described, not working, but lights up, nothing on screen and handle missing  :-// Have you powered it up?, did the lights come on? If so, sorry, but I think they have fulfilled their brief. Ok, it is clear that at least 1 PCB is missing, are they supposed to be aware of that? It sucks, I know, but the Dwagon is normally more astute than this, did you not ask any questions about this?
--- End quote ---

Short version: It was sold as an oscilloscope for parts, not sold as 75% of an oscilloscope with crucial parts missing.

That is "significantly not as described".

As I explained to Vince; had it been a non-critical external part obviously missing from photos, or an accessory, that would have been different.

There's fair reason to believe the seller knew they were doing something dishonest, or they'd have taken the whole monitor. It is much easier to remove than that PCB and doesn't risk causing a CRT implosion.

Of course, taking the whole monitor would've left a very obvious hole in the face of the unit.

SELLER HOMEPAGE: https://www.ebay.com/usr/tekyard_medical


mnem
Those bent pins on the CRT totes made me go tho...

--- End quote ---



Or just breaking the CRT...

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:
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