Solartron 7151 Maintenance Manual - Page 1
Forum section: electronics / testgear

author: grizewald
author_rank: Frequent Contributor
timestamp: March 31, 2019, 08:31:12 am
content: I'm trying to get a Solartron 7151 that I bought some time ago up and running. Sadly, there was damage to the Earthy Logic PCB due to the backup battery leaking long before I bought the meter.Now I've repaired that damage and tried powering up the meter for the first time. That gives me a FAIL 01 error, and indeed, I can't see any traffic on the opto-isolated RX and TX channels between the two boards.My problem is that I don't have a maintenance manual for the 7151. While the Floating Analogue and Logic PCB is the same as the 7150+, the Earthy Logic board is completely different. I've searched the usual places like KO4BB, ElektroTanya, etc but without success.Does anyone here have a PDF of the 7151 Maintenance Manual they can let me have a copy of please?

author: DC1MC
author_rank: Super Contributor
timestamp: March 31, 2019, 05:29:00 pm
content: The only place in the universe that seems to have ithttp://www.telford-electronics.co.uk/manual.php?alpha=sIf you ask for a quote, please share, I'm willing to contribute for a part of it for a good scan.What battery leaked, the calibration constants one on the logic board ?Cheers,DC1MC

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: March 31, 2019, 08:20:39 pm
content: I would join the effort too - great idea!

author: grizewald
author_rank: Frequent Contributor
timestamp: April 01, 2019, 05:34:13 am
content: Quote from: DC1MC on March 31, 2019, 05:29:00 pmI have already sent a mail to telford electronics, so hopefully I'll get a reply and a manual soon.The calibration constants are held in unobtanium NC733 EAROMs. The only battery is the one on the logic board next to the main transformer which keeps the clock going and the RAM which holds the current test program and parameters.It was a nasty leak. The alkali from the battery did significant damage to the PCB in terms of dissolving various vias which I had to repair and compromising the main smoothing caps and an RS232 line driver. The fact that the meter starts up with FAIL 01 probably indicates that there's some other damage which I didn't detect. It's difficult to debug without a circuit diagram though!I doubt T.E. will be wanting silly money for a manual, but if it's painful, I'll let you guys know.I have access to high speed, high resolution scanners, so as soon as I get a manual, I'll get it scanned, OCR-ed and uploaded!

author: grizewald
author_rank: Frequent Contributor
timestamp: April 02, 2019, 09:51:58 am
content: Still no reply from Telford Electronics.I've forwarded my enquiry to another of the e-mail addresses listed on the site. If I don't get a reply on that one, I guess I'll have to phone the guy.

author: perdrix
author_rank: Frequent Contributor
timestamp: April 02, 2019, 02:23:09 pm
content: I just got an email from Telford Eelctronics saying they don't have any. So unless you bought the last one ...Anyone out there with a paper copy and access to a scanner?CheersDavid

author: grizewald
author_rank: Frequent Contributor
timestamp: April 02, 2019, 04:01:19 pm
content: Quote from: perdrix on April 02, 2019, 02:23:09 pmI just received the same bad news.It's starting to look like this manual is lost forever.

author: grizewald
author_rank: Frequent Contributor
timestamp: April 04, 2019, 07:34:55 pm
content: Salvation may be at hand, but I won't say any more until I have it in my hand and can verify it's the real thing.Watch this space!

author: coromonadalix
author_rank: Super Contributor
timestamp: April 04, 2019, 08:38:05 pm
content: fingers crossed

author: grizewald
author_rank: Frequent Contributor
timestamp: April 11, 2019, 11:13:31 am
content: So, it turns out that Telford Electronics did actually have a copy of the 7151 Maintenance Manual, but it had been recorded as being a user manual instead. They got back to me the day after telling me that they didn't have one to give me the good news.I've held off until I actually received my copy, just in case it turned out not to be true.But it is true!This just dropped through my front door:It's a very nice copy with all the circuit diagrams scanned full size and neatly folded back to the A4 pages like this:Hopefully I'll get some time tomorrow to put the manual through a scanner. I'll scan at 300dpi in greyscale and preserve the A3 pages in the scan as well. I will also be able to OCR the text so that you can search the resulting PDF file.I'll upload the final PDF to KO4BB and post a new message to this thread when I have done it.Of course, if anyone wants a copy made out of dead trees, you can turn to Telford Electronics and pay for one!

author: DC1MC
author_rank: Super Contributor
timestamp: April 11, 2019, 11:15:58 am
content: , now I can bid for one.How much was the tree cadaver copy ?Cheers,DC1MC

author: grizewald
author_rank: Frequent Contributor
timestamp: April 11, 2019, 02:41:50 pm
content: Quote from: DC1MC on April 11, 2019, 11:15:58 amThirty UK pounds including postage to Sweden.There's a few pages in section six which have suffered from the opposite side of the page bleeding through during scanning, but thankfully, it doesn't obscure anything. A few sheets obviously skewed in the feeder during scanning as well, but not so much that anything is missing.

author: grizewald
author_rank: Frequent Contributor
timestamp: April 12, 2019, 09:19:01 pm
content: I just uploaded a PDF of this towww.ko4bb.comI've OCR'ed it, deskewed the skewed pages and converted to black and white to reduce the size. Due to the binding holes there is a row of black rectangles along the left or right side of the pages. As some pages have been deskewed, the binding holes are slanted on those pages.The A3 sheets are left as A3 rather than cutting them into two A4 pages. On the A3 sheets, I've discarded the blank rear sides. I've left the blank sides of the A4 pages in place as they function as section breaks in the original paper version.As I mentioned in my previous post, section six has some bleed-through from the other side of some pages. It doesn't really obscure anything and section six isn't crucial anyway. The circuit diagrams are clean and clear, which is the most important part.Until it gets moved to the right place on ko4bb, it's only available by FTP from ftp.ko4bb.com using 'manualuploads' as both login and password. I'd upload it here, but the file exceeds the posting size limit as it's 2.7MB in size.Enjoy!

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: April 12, 2019, 11:34:08 pm
content: No ftp from this adress possible, at least for me. It just reverts to the normal site.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 13, 2019, 02:49:05 am
content: nope me too redirectedthe right sentence is :ftp://manualuploads:manualuploads@ftp.ko4bb.comIs it possible to correct the section 6 ?? or rescan only this section ??thks for your valuable effort and time.

author: tggzzz
author_rank: Super Contributor
timestamp: April 13, 2019, 09:14:38 am
content: Quote from: grizewald on April 12, 2019, 09:19:01 pmI wish someone would do the same for the 7075 schematics, which are only just about readable. I'd pay money for it

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: April 13, 2019, 01:54:59 pm
content: Quote from: tggzzz on April 13, 2019, 09:14:38 amYes, I have often wished for a scan-bitch too.

author: tggzzz
author_rank: Super Contributor
timestamp: April 13, 2019, 08:27:42 pm
content: Quote from: Neomys Sapiens on April 13, 2019, 01:54:59 pmIf I had I printed manual (hint hint),I'dscan (or more likely photograph and stitch) the schematics and upload them

author: grizewald
author_rank: Frequent Contributor
timestamp: April 13, 2019, 10:26:35 pm
content: If anyone needs manuals scanning in high quality and without splitting A3 into A4, just give me a shout. Scanning takes very little time as I have access to machines which can scan 7,500 A4 pages per hour in 300 dpi resolution and full colour if needed. As long as what needs scanning will benefit the community, is in good enough condition to make scanning it worthwhile and it's not more than one manual per week, I'm happy to be a scan bitch.(You have to cover the costs of sending the paper and receiving it back again if you want the paper returned to you.)Once my summer vacation starts, I'll have some time to work with the scans I made of the 7151 MM and:Remove the bleed through in section 6.Remove the black rectangles from the binding holes.Fix the horizontal dirt lines on some of the other pages.Fix the various black edges caused by deskewing the text.Use the OCR results to create a proper index for the PDF file.Getting rid of the problems with the source document is a lot of work in Gimp though and for now, I'd rather give people access to the manual than spend time I don't have polishing the images.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: April 14, 2019, 02:59:28 am
content: We totally appreciate it!

author: Chris56000
author_rank: Frequent Contributor
timestamp: April 14, 2019, 09:33:03 am
content: Hi!And me also – the circuit diagrams were quite clear and legible – I've added 'em to my redrawing list for a future rainy day!Chris Williams

author: grizewald
author_rank: Frequent Contributor
timestamp: April 15, 2019, 04:49:20 pm
content: Has anyone in this thread fixed a 7150 or 7151 which has a "Fail 01" message on startup?I understand that the error means that the communication over the opto-isolated link isn't working. What I'd like to understand is who starts the conversation? Does the earthy board talk first or the analogue board?From what I've seen so far, both microprocessors seem to be running, but there is no activity on the TX or RX lines to and from the opto-isolators. Presumably, one of the boards starts the conversation and if none starts, they don't bother trying any more. I'm surprised that the watchdog circuits are not resetting the processors in that case though, as a lack of action over the link between the boards should trigger the watchdog and reset them.All clues gratefully received!