fluke 8800A not working

johngalt47 · 27th June 2012, 12:33 AM

I actually have three of these, none of which works.

The manual says the Ohms converter board has two batteries on it. Neither of the units I opened have these batteries. One of them has a Rev R main board and the other has a Rev Y main board.

Anyone have experience with these DVMs?

Refugee1 · 1st July 2012, 06:37 PM

I have had the same problem.
I have two of them. On both of them the range relay chatters all the time and on all ranges

They are both useless like this and are due back on the bench soon after i get a very dodgy scope fixed and out of the way.
I will watch this thread and see if something comes up.

richiem · 2nd July 2012, 11:39 PM

My old 8800A had the chattering problem and it was two bad power supply filter caps letting gobs of AC into the system. Replacing the caps fixed everything.

RE ohms batteries, I think at some point, Fluke added an isolated supply to run the converter -- I've never seen a manual that shows it, but I'll keep looking.

Refugee1 · 4th July 2012, 02:20 AM

Mine both indeed have the isolated supply and no batteries.
I will do what the vintage radio guys call a re-cap on the power supply. I did measure the voltages and they looked fine. I suppose i could scope them and find the exact one though.
Cheers for that. Now i know.

Refugee1 · 7th July 2012, 07:53 PM

Here are the culprits.
Both of my 8800As are now awaiting spares.
I have seen light on both of them with capacitors that don't fit very well just to check that it is indeed worth ordering the parts.

Refugee1 · 7th July 2012, 08:15 PM

Here are the culprits.
Both of my 8800As are now awaiting spares.
I have seen light on both of them with capacitors that don't fit very well just to check that it is indeed worth ordering the parts.

27th June 2012, 12:33 AM	#1
johngalt47 diyAudio Member Join Date: Mar 2004 Location: Texas	fluke 8800A not working I actually have three of these, none of which works. The manual says the Ohms converter board has two batteries on it. Neither of the units I opened have these batteries. One of them has a Rev R main board and the other has a Rev Y main board. Anyone have experience with these DVMs? __________________ Any technology sufficiently advanced is indistinguishable from magic

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fluke 199 need help	ALP	Equipment & Tools	1	7th December 2012 02:15 PM
Fluke 23 Series II multimeter, I need a part value to get it working.	Pioneer621	Equipment & Tools	3	28th November 2009 02:09 PM
Fluke 1900A	jblmar	Solid State	3	25th October 2007 06:50 PM
Get a Fluke DMM	ThSpeakerDude88	Parts	107	21st August 2007 12:40 AM
WTB Krell KSA Mk2- working or non working	Jozua	Swap Meet	0	20th March 2006 11:14 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

1st July 2012, 06:37 PM	#2
Refugee1 diyAudio Member Join Date: Jul 2012 Location: Worksop	I have had the same problem. I have two of them. On both of them the range relay chatters all the time and on all ranges They are both useless like this and are due back on the bench soon after i get a very dodgy scope fixed and out of the way. I will watch this thread and see if something comes up.

2nd July 2012, 11:39 PM	#3
richiem diyAudio Member Join Date: Sep 2010 Location: Grapeview, WA	My old 8800A had the chattering problem and it was two bad power supply filter caps letting gobs of AC into the system. Replacing the caps fixed everything. RE ohms batteries, I think at some point, Fluke added an isolated supply to run the converter -- I've never seen a manual that shows it, but I'll keep looking.

4th July 2012, 02:20 AM	#4
Refugee1 diyAudio Member Join Date: Jul 2012 Location: Worksop	Mine both indeed have the isolated supply and no batteries. I will do what the vintage radio guys call a re-cap on the power supply. I did measure the voltages and they looked fine. I suppose i could scope them and find the exact one though. Cheers for that. Now i know.

7th July 2012, 08:15 PM	#6
Refugee1 diyAudio Member Join Date: Jul 2012 Location: Worksop	Here are the culprits. Both of my 8800As are now awaiting spares. I have seen light on both of them with capacitors that don't fit very well just to check that it is indeed worth ordering the parts.