HP8560E CRT pinout and component level schematics for A17 board - Page 1
Forum section: electronics / repair

author: DC1MC
author_rank: Super Contributor
timestamp: April 13, 2018, 01:15:36 pm
content: Hello everybody, I was wondering if anybody could help with a component level schematic for the CRT display driver for an HP8560E, I have the dim non-highlighted fonts issue and found some CRT rejuventator for a good price, but besides the pinout for J7 in the service manual I don't have many info about A17 CRT driver board.The CRT will not stay too long afterwards, I will either sell the SA or replace the CRT with NewScope-6 Color LCD kit.Any help with a data-sheet for the CRT ( also known as Panasonic 170XB31 ) and a component level document for the A17 board is most appreciated.Thanks,DC!MC

author: james_s
author_rank: Super Contributor
timestamp: April 13, 2018, 08:54:19 pm
content: I don't know if this will help, but most small neck monochrome CRTs have this pinout.1. G12. K3. Heater 14. Heater 25. G1 (internally connected to pin 1)6. G27. Focus

author: DC1MC
author_rank: Super Contributor
timestamp: April 13, 2018, 09:16:45 pm
content: Quote from: james_s on April 13, 2018, 08:54:19 pmThanks a lot, I'll give it a try and compare it with J7 where I have the pinout and signal names.I still want to have the A17 board schematic and layout, in case there is a chance that some multiplexer or other part failed.Cheers,DC1MC

author: drussell
author_rank: Super Contributor
timestamp: April 14, 2018, 03:56:49 am
content: According to the set-up book for my Sencore CR-70, the 170XB31 is:QuoteSo, that would be:Filament- 1 & 14 (6.0 volt, BTW. not the typical 6.3)Cathode- 7G1 (Control grid)- 2G2 (Screen / 1st accel)- 5

author: drussell
author_rank: Super Contributor
timestamp: April 14, 2018, 04:15:14 am
content: Also, I'm assuming you already have the service manual? This is the most recent version I could find:http://www.testunlimited.com/pdf/an/08560-90157.pdfIt doesn't have schematics for the A17 modules, but it does contain a bunch of troubleshooting info, adjustment info and block diagrams.There is also a chart on page 657 that lists the "Component-Level Information Packets" for the various versions of A17, though good luck trying to actually find those documents...Quote

author: DC1MC
author_rank: Super Contributor
timestamp: April 14, 2018, 09:40:53 am
content: Quote from: drussell on April 14, 2018, 03:56:49 amThanks a lot @drussel for the pinout, now it's simple to verify it.Still looking for the documents that you've nicely listed, maybe some kind soul will chime in, I have the service manual, it helps but if I want to debug the driver board, then I need the schematics and component placing drawings for A17.Cheers,DC1MC

author: drussell
author_rank: Super Contributor
timestamp: April 14, 2018, 12:58:25 pm
content: Quote from: DC1MC on April 14, 2018, 09:40:53 amIndeed, that would make things easier, of course...Which version of the board do you have, just in case someone hereDOEShave access to the information packets?

author: Chris56000
author_rank: Frequent Contributor
timestamp: April 14, 2018, 07:33:00 pm
content: Hi!Just a thought – Artek have the CLIP for the 8562 – does that use the same. CRT assembly?Chris Williams

author: DC1MC
author_rank: Super Contributor
timestamp: April 14, 2018, 07:46:08 pm
content: Quote from: Chris56000 on April 14, 2018, 07:33:00 pmEven the 8560 has something like 4 models of the board, I have to dig and see the exact revision of my board.Cheers,DC1MC

author: SoundTech-LG
author_rank: Frequent Contributor
timestamp: April 16, 2018, 03:09:46 am
content: Hope it helps. I'm interested in the LCD upgrade as well.

author: charlyd
author_rank: Frequent Contributor
timestamp: March 21, 2020, 12:07:06 pm
content: Hi me too interrested in the LCD upgrade.

author: DC1MC
author_rank: Super Contributor
timestamp: March 30, 2020, 09:08:46 pm
content: The problem with the "proper" LCD replacement kit, the NewScope-6, is that is bloody expensive, way more than the SA costed to buy, because it's not just a small adapter board and a LCD, but a pretty complex FPGA based assemblythat does a lot converting the vector to raster and much more. Unfortunately they will probably just disappear, never to be found again.All the other CRT to LCD replacements that I've seen they were sad hack-jobs or Pfuscherei as the locals calls it.DC1MCEDIT: Just for fun, here's the installation manual:http://simmconnlabscom.ipage.com/tech/NewScope-6_OM.pdf

author: james_s
author_rank: Super Contributor
timestamp: April 10, 2020, 05:44:16 am
content: When I saw this thread originally a couple years ago I read it as 8590, unfortunately the 8560 uses an electrostatic deflection tube similar to an analog scope CRT. I don't think there's a simpler way around it than the FPGA based adapters already available. Still the Newscope displays do strike me as being overpriced but then I suppose they are only sold in small quantities.

author: DC1MC
author_rank: Super Contributor
timestamp: April 10, 2020, 02:33:09 pm
content: Quote from: james_s on April 10, 2020, 05:44:16 amThe sad story of vector displays, one needs a rasterizer to save them, the cool part is that if you can connect it closer to the SA data source, one can do much more with it to display and eventually analyze it. The analogue part of these series is supperb.Cheers,DC1MC