87V schematics! - Page 1
Forum section: electronics / testgear

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 08:38:39 pm
content: Yes. The U.S. Army documentation for the 87V(AN) includes schematics and (complete?) parts list.The PDF file size slightly larger than allowed here.I'm sure many folks here would like this information.Perhaps somebody here could get me an email to someone appropriate who disseminate this info or give me some other way to post it?I've not seen this info anywhere til now. It was on a CD-ROM of Fluke info I picked up somewhere and never really looked at.Not to worry, been a member here a long time - no viruses or anything like that. Promise.

author: Mr. Scram
author_rank: Super Contributor
timestamp: December 06, 2018, 08:40:35 pm
content: It's likely possible to repackage the PDF to make it smaller.

author: DaJMasta
author_rank: Super Contributor
timestamp: December 06, 2018, 08:49:09 pm
content: I'm sure the KO4BB archive could use a copy too!http://www.ko4bb.com/getsimple/index.php?id=upload-instructions

author: Gyro
author_rank: Super Contributor
timestamp: December 06, 2018, 08:53:11 pm
content: https://www.pdfmerge.com/There are links to Split PDF and Compress PDF at the bottom of the page. I'd go for the split and merge approach rather than compress to maintain maximum quality.Certainly upload it to KO4BB too, but it can take a while to be put up.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 09:02:51 pm
content: Here's part One:

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 09:16:37 pm
content: Here's part 2 of 4 - 87V service manual.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 09:17:20 pm
content: Here's part 3 of 4 - 87V service manual.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 09:22:19 pm
content: And Part 4 of 4 - this one has the schematics.I uploaded the full PDF to KO4BB as well.

author: bd139
author_rank: Super Contributor
timestamp: December 06, 2018, 09:26:39 pm
content: That’s really cool. Thanks for posting.

author: mtdoc
author_rank: Super Contributor
timestamp: December 06, 2018, 09:32:52 pm
content: Thanks for posting but #2 and #3 have the wrong pages. # 2 is pages 18-22 and #3 is pages 23-34. Schematics start on page 38

author: gnavigator1007
author_rank: Unknown
timestamp: December 06, 2018, 09:33:37 pm
content: Any other interesting stuff on the disc?

author: gnavigator1007
author_rank: Unknown
timestamp: December 06, 2018, 09:42:36 pm
content: Quote from: mtdoc on December 06, 2018, 09:32:52 pmEverything appears to be there for me.

author: mtdoc
author_rank: Super Contributor
timestamp: December 06, 2018, 09:46:41 pm
content: Quote from: gnavigator1007 on December 06, 2018, 09:42:36 pmYes he fixed it. Now there are 4 parts (prior was 1-3 of 3).Thanks mzacharias!

author: EEVblog
author_rank: Unknown
timestamp: December 06, 2018, 09:51:15 pm
content: The LCD contrast has thermistor compensation, that's interesting.And there is an IR communications serial interface not loaded.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 09:58:53 pm
content: Sorry for the mess uploading y'all. The PDF split software was fairly quirky.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 06, 2018, 10:12:18 pm
content: Quote from: gnavigator1007 on December 06, 2018, 09:33:37 pmJust publicly available stuff so far as I can tell.

author: Specmaster
author_rank: Super Contributor
timestamp: December 06, 2018, 10:15:06 pm
content: If anyone wants this as a single file rather then 4, please PM me with your email address and I'll email you back a copy with pleasure.

author: bd139
author_rank: Super Contributor
timestamp: December 06, 2018, 10:18:26 pm
content: TP37 looks interesting. Voltage divider labelled MODEL SELECTION.

author: rsjsouza
author_rank: Super Contributor
timestamp: December 06, 2018, 11:26:08 pm
content: Quite useful info! Thank you!Specmaster, are you planning to post the full manual somewhere? KO4BB perhaps?

author: Specmaster
author_rank: Super Contributor
timestamp: December 06, 2018, 11:36:25 pm
content: Quote from: rsjsouza on December 06, 2018, 11:26:08 pmAlready did that tonight.

author: EEVblog
author_rank: Unknown
timestamp: December 07, 2018, 01:21:53 am
content: Quote from: bd139 on December 06, 2018, 10:18:26 pmSurely the 83V (the 85 isn't a thing any more?) would not have the RMS converter chip chip fitted though?There are quite a lot of jumper difference between units as well, R104, R112, R113, and U12 MUX is only on the 87.Maybe you could enabled 20000 count mode on the 83V though?Does anyone have a teardown photo of the 83V?

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 07, 2018, 03:21:07 am
content: Quote from: EEVblog on December 07, 2018, 01:21:53 am

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 07, 2018, 03:25:19 am
content: Quote from: Specmaster on December 06, 2018, 11:36:25 pmYeah - I uploaded the whole manual to K04BB also; I'm sure there's some latency there.

author: mnementh
author_rank: Super Contributor
timestamp: December 07, 2018, 04:37:58 am
content: Ooooh! Tasty!Perusing his archive, I see he didn't have the Fluke 187/189 User & Calibration Manuals I have; well now he does. Now if I can just find the full Service Manual... I have the 87-IV/89-IV Service Manual, which I understand is the same meter, but mine doen't have schematics.Thanks for the reminder I needed to do that!mnem*Trawling*

author: Specmaster
author_rank: Super Contributor
timestamp: December 07, 2018, 09:57:11 am
content: Quote from: Mr. Scram on December 06, 2018, 08:40:35 pmNo it isn't, I merged the 4 parts and ran the Adobe acrobat professional optimisation routine and it came above 1Mb file size.

author: TiN
author_rank: Super Contributor
timestamp: December 07, 2018, 11:08:05 am
content: Alsomirrored 87V/AN full PDF. Thanks!

author: retiredcaps
author_rank: Super Contributor
timestamp: December 07, 2018, 08:08:23 pm
content: Thanks Chris.In a time of crappy unboxing youtube videos, 99.9% of the people would look at the CD and think it was a digital copy of the user manual, legalese, etc and just chuck it aside.So thanking for actually looking and posting the information. It will make fixing 87V in the future easier for us.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 08, 2018, 11:51:50 am
content: Quote from: retiredcaps on December 07, 2018, 08:08:23 pmThe 87V service manual did not come from the CD packed with new units. It was on a burned CD I picked up somewhere.

author: 001
author_rank: Super Contributor
timestamp: December 08, 2018, 03:31:26 pm
content: Can anybody tell me how input protection works?I see 910V varistor (?) rated at too high voltage isnt it?

author: tsman
author_rank: Frequent Contributor
timestamp: December 08, 2018, 04:27:12 pm
content: Quote from: 001 on December 08, 2018, 03:31:26 pmFluke explains how it works on page 11+ (actual PDF page 19+)Quote from: 001 on December 08, 2018, 03:31:26 pmThe MOVs are only there to prevent arcing across the switch.