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HP XY Display PSU Query

Tony All Messages By This Member #140502 Hi, I have an HP XY display without the matching external power supply and so Im planning to hook up my own. The input power connector is labelled as shown in the picture attached.? My interpretation is that the pins with an “R” suffix means “return”. So “+250R” is the return for the “+250 IN”. Likewise for the 21V . Is that the right way to read this? thanks tony
Dave McGuire Member Profile All Messages By This Member #140503 On 11/23/23 16:44, Tony wrote: I have an HP XY display without the matching external power supply and so Im planning to hook up my own. The input power connector is labelled as shown in the picture attached. My interpretation is that the pins with an “R” suffix means “return”. So “+250R” is the return for the “+250 IN”. Likewise for the 21V . Is that the right way to read this? That's how I would interpret it. Can you find a schematic? Odd, though, that there's a +15V and -15V, but no ground. Are +21R and +250R connected to each other on the board, meaning could that constitute a circuit-wide ground? -Dave -- Dave McGuire, AK4HZ New Kensington, PA
Tom Lee All Messages By This Member #140505 Possible, but it can also be that there is a resistor between the raw input and the pin marked R (either for current-limiting or filtering purposes, or both). I've seen that use of R far more often than to indicate a ground return. You can use an ohmmeter to measure between the IN and corresponding R pin to see if there is a low-value resistance between them. -- Cheers Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070 toggle quoted message Show quoted text On 11/23/2023 1:44 PM, Tony wrote: Hi, I have an HP XY display without the matching external power supply and so Im planning to hook up my own. The input power connector is labelled as shown in the picture attached. My interpretation is that the pins with an “R” suffix means “return”. So “+250R” is the return for the “+250 IN”. Likewise for the 21V . Is that the right way to read this?
paulswed All Messages By This Member #140506 That is how I also read it. Paul WB8TSL
Tony All Messages By This Member #140509 Hi Dave, No schematics, no pictures, nothing - this XY model (1336A) seems to be a bit of a ghost. I have not traced the +/-15V circuit yet (or indeed any of the others!)? - that's a job for the weekend coming. I had assumed that the chassis was the ground for the 15V circuits. Would the 250/21V rails need specific returns if they were (for some reason) AC supplies? Tony?
Tom Haynes All Messages By This Member #140510 It looks like the 1336A received a revision to extend the input range for medical use and became the 1336S. There is more info available about the S rev.? Here is a spec sheet There are a few details in the march 1986 HP Bench Briefs. VectorVGA has a scan of a doc listing other models in the 13xx range. None of the links work anymore so here is a copy of the important bits. Hewlett Packard XY Displays HP 1208A 5" XY Display Service Manual HP 1208B 5" XY Display Service Manual HP 1300A 12" XY Display HP Journal, Operating Supplement HP 1302A XY Display HP 1304A 14" XY Display Service Manual, 13XX Spec Matrix HP 1310A 19" XY Display HP Catalog, HP Journal HP 1310B 19" XY Display Service Manual, 13XX Spec Matrix HP 1311A 14" XY Display HP Catalog, HP Journal HP 1311B 14" XY Display Service Manual, Picture, 13XX Spec Matrix HP 1317A 17” XY Display HP Catalog, 13XX Spec Matrix HP 1317B 17” XY Display Picture, Picture HP 1321A 17” XY Display Service Manual HP 1321B 21” XY Display Magazine Ad, 13XX Spec Matrix HP 1330A 5" XY Display Service Manual HP 1331A XY Display Picture HP 1331B XY Display HP 1331C XY Display HP 1331D XY Display HP 1332A 6” Hi-Res XY Display Service Manual, 13XX Spec Matrix, Picture HP 1333A 5” XY Display 13XX Spec Matrix HP 1335A 4.5" XY Storage Display Service Manual, Picture, 13XX Spec Matrix HP 1335A/H01 4.5" XY Storage Display Service Manual HP 1336S 5" XY Display System Service Manual, 13XX Spec Matrix HP 1338A 6" XY Tri-color Display 13XX Spec Matrix HP 1340A 6” Hi-Res XY Display Service Manual #1, Service Manual #2, 13XX Spec Matrix HP 1345A 6" XY Digital Display Service Manual HP 1346A 6" XY HPIB Display Programming Manual HP 1347A 6" XY HPIB Display Programming Manual And a neat but of trivia, the 1336A was the hero display in the movie War Games. Do you want to play thermo nuclear war? toggle quoted message Show quoted text On Fri, Nov 24, 2023, 5:20?PM Tony <tonycox01@...> wrote: Hi Dave, No schematics, no pictures, nothing - this XY model (1336A) seems to be a bit of a ghost. I have not traced the +/-15V circuit yet (or indeed any of the others!)? - that's a job for the weekend coming. I had assumed that the chassis was the ground for the 15V circuits. Would the 250/21V rails need specific returns if they were (for some reason) AC supplies? Tony?
Tom Lee All Messages By This Member #140511 开云体育 Hi Tony, If you assume that the 1336A and 1336S are similar, then maybe the schematics for the latter can be used as a rough guide, at the very least. A quick look at the connectors supports your initial guess that "R" stands for return. If you haven't downloaded the 1336S's manual, take a look at it and see if it's at all helpful. -- Cheers Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070 On 11/24/2023 12:20 AM, Tony wrote: toggle quoted message Show quoted text Hi Dave, No schematics, no pictures, nothing - this XY model (1336A) seems to be a bit of a ghost. I have not traced the +/-15V circuit yet (or indeed any of the others!)? - that's a job for the weekend coming. I had assumed that the chassis was the ground for the 15V circuits. Would the 250/21V rails need specific returns if they were (for some reason) AC supplies? Tony?
Tony All Messages By This Member #140512 Thanks Tom - I saw the spec sheet and was intrigued by the high definition of these (albeit quite small) displays.? I was aware that they had some significance for the movie mentioned :-) BW Tony
Tony All Messages By This Member #140513 Sadly there does not seem to be a manual of any kind relating to any of the different versions of the 1336 display - other than the spec sheet from various HP catalogues. Or at least my excavations on the internet have not revealed anything. And it is not in the Artek manual portfolio either. Internally they have a very different design to the later 1340A displays that I am more familiar with. BW Tony
Tom Haynes All Messages By This Member #140516 Oops, I was mistaken. The 1336S is an external power supply for the 1336A. Does your 1336A have AC and DC inputs? toggle quoted message Show quoted text On Fri, Nov 24, 2023, 9:39?PM Tony <tonycox01@...> wrote: Sadly there does not seem to be a manual of any kind relating to any of the different versions of the 1336 display - other than the spec sheet from various HP catalogues. Or at least my excavations on the internet have not revealed anything. And it is not in the Artek manual portfolio either. Internally they have a very different design to the later 1340A displays that I am more familiar with. BW Tony
Tony All Messages By This Member #140525 I think thy is the problem - there is a mil spec JAE connector in the back with pins for the various supply rails. No idea is any of them are AC. Bw Tony toggle quoted message Show quoted text On Fri, 24 Nov 2023 at 13:29, Tom Haynes <tomhaynes.net@...> wrote: Oops, I was mistaken. The 1336S is an external power supply for the 1336A. Does your 1336A have AC and DC inputs? On Fri, Nov 24, 2023, 9:39?PM Tony <tonycox01@...> wrote: Sadly there does not seem to be a manual of any kind relating to any of the different versions of the 1336 display - other than the spec sheet from various HP catalogues. Or at least my excavations on the internet have not revealed anything. And it is not in the Artek manual portfolio either. Internally they have a very different design to the later 1340A displays that I am more familiar with. BW Tony
Tom Haynes All Messages By This Member #140531 Ah now I understand. You are in luck! Keysight has the operation and service manual for the 1336S which is the 1336P power supply plus a 1336A display. It has a full parts list, schematics and diagrams for both 1336A and S. The power pin out is: (Power connector pin/A1J3 motherboard pin) Pin 1/5 +250VDC Pin 2/3 +20VDC Pin 3/1 +15VDC Pin 4/2 -15VDC Pin 5/NC Chassis GND Pin 6/NC Chassis GND Pin 7/NC Chassis GND Pin 8/4 GND for +20VDC Pin 9/6 GND for +250VDC I hope you are able to get it going! toggle quoted message Show quoted text On Sat, Nov 25, 2023, 2:49?AM Tony <tonycox01@...> wrote: I think thy is the problem - there is a mil spec JAE connector in the back with pins for the various supply rails. No idea is any of them are AC. Bw Tony On Fri, 24 Nov 2023 at 13:29, Tom Haynes <tomhaynes.net@...> wrote: Oops, I was mistaken. The 1336S is an external power supply for the 1336A. Does your 1336A have AC and DC inputs? On Fri, Nov 24, 2023, 9:39?PM Tony <tonycox01@...> wrote: Sadly there does not seem to be a manual of any kind relating to any of the different versions of the 1336 display - other than the spec sheet from various HP catalogues. Or at least my excavations on the internet have not revealed anything. And it is not in the Artek manual portfolio either. Internally they have a very different design to the later 1340A displays that I am more familiar with. BW Tony
Tom Haynes All Messages By This Member #140532 +250V supply is current limited to 270mA.? +15V uses an LM317T without a pass transistor so maxes out around 1.5A -15 uses 79UG1C without pass transistor so maxes out around 1A.? +20 uses a 21.5V zener driving a 70W Darlington as pass transistor which equates to about 3.25A but probably much less. toggle quoted message Show quoted text On Sat, Nov 25, 2023, 9:37?AM Tom Haynes via <=[email protected]> wrote: Ah now I understand. You are in luck! Keysight has the operation and service manual for the 1336S which is the 1336P power supply plus a 1336A display. It has a full parts list, schematics and diagrams for both 1336A and S. The power pin out is: (Power connector pin/A1J3 motherboard pin) Pin 1/5 +250VDC Pin 2/3 +20VDC Pin 3/1 +15VDC Pin 4/2 -15VDC Pin 5/NC Chassis GND Pin 6/NC Chassis GND Pin 7/NC Chassis GND Pin 8/4 GND for +20VDC Pin 9/6 GND for +250VDC I hope you are able to get it going! On Sat, Nov 25, 2023, 2:49?AM Tony <tonycox01@...> wrote: I think thy is the problem - there is a mil spec JAE connector in the back with pins for the various supply rails. No idea is any of them are AC. Bw Tony On Fri, 24 Nov 2023 at 13:29, Tom Haynes <tomhaynes.net@...> wrote: Oops, I was mistaken. The 1336S is an external power supply for the 1336A. Does your 1336A have AC and DC inputs? On Fri, Nov 24, 2023, 9:39?PM Tony <tonycox01@...> wrote: Sadly there does not seem to be a manual of any kind relating to any of the different versions of the 1336 display - other than the spec sheet from various HP catalogues. Or at least my excavations on the internet have not revealed anything. And it is not in the Artek manual portfolio either. Internally they have a very different design to the later 1340A displays that I am more familiar with. BW Tony
Tony All Messages By This Member #140533 Ah! Outstanding. Thank you for the link - that will definitely change this project away ?from having only marginal chance of success! tony

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