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Electronics => Repair => Topic started by: dl1640 on October 12, 2019, 06:16:10 am

Title: Agilent E3632A dc power supply repair fan & binding post
Post by: dl1640 on October 12, 2019, 06:16:10 am
Hi,

I got this power supply in not very good condition, the fan has a broken wing and insulation of several binding post are gone.
Moreover I think the previous user (or seller) mount the fan in opposite direction, it was mounted the the air would blow into the chassis.

How is the correct way to mount this fan? Is this a genuine one used in E3632A?
How to recover or replace the binding post insulation?

thanks,

[attachimg=1]
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: Kwakerman on October 14, 2019, 06:34:05 am
Hi, I have a 3631 and a 3648, both blow air out of the side vents so I think yours was the correct way around.  Don't know if that fan is the standard one,  HP/Keysight sell replacement binding posts if you want to keep it looking standard
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: bd139 on October 14, 2019, 07:17:07 am
The HP binding posts are pretty expensive from Keysight spares. Think £7 a go last time I got a quote. TME sell some that look exactly the same for a lot less money. I did a whole E3631 for £22 inc delivery. You can probably source similar ones easily anywhere if you go looking
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: TERRA Operative on October 14, 2019, 09:42:59 am
TME only have blue and green left in the HP/Agilent type binding posts, but there are others around that look almost the same with the wider range of colours.
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: dl1640 on October 15, 2019, 09:47:56 am
Take it apart, the binding post seems to be an assembly part, soldered on PCB  :clap:
I got this one for about $100, don't wanna spend a lot on binding post  :popcorn:
The replacement fan is on the way.

[attach=1]
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: bd139 on October 15, 2019, 09:49:45 am
Oh never seen that before. That's nasty!
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: dl1640 on October 16, 2019, 10:44:22 am
Yes, it is nasty. The fan is replaced, the interior and exterior were air blowed and wiped, just leave the naked binding posts as is...
All self test passed, calibration string from GPIB is factory cal jul 2006, good.
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: Ussovak on June 07, 2020, 02:30:19 pm
I believe your fan is mounted backwards. The fan should be mounted so air is pulled through the side vents and blown out the back of the unit.

See attached capture from service manual below.

Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: madao on June 07, 2020, 05:22:54 pm
I have two  E3632A, (HP and Agilent Logo) , fan blow on side vent out. 
One wasn't opened (warranty-seal)

greetings
matt
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: Ussovak on June 07, 2020, 10:58:02 pm
Maybe the manual for E3632A has a complete sentence as a type-o?
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: JohnPi on June 07, 2020, 11:24:33 pm
I usually replace the OEM fans with Noctua fans - you can find them online; just search for your diameter, thickness and voltage. They are quieter than the OEM ones. Use the rubber mounting studs that some with them; not the original bolts.
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: bd139 on June 08, 2020, 08:00:21 am
Add some RGB while you’re in there too  :-DD.

Seriously though, good suggestion.
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: dl1640 on August 13, 2020, 02:44:05 pm
I have two  E3632A, (HP and Agilent Logo) , fan blow on side vent out. 
One wasn't opened (warranty-seal)

greetings
matt

I think this is correct,
Quote
fan blow on side vent out
This unit is quite handy though I do not use it very often.
I'm going to have a new toy E36312A, for work  :D
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: DeepLink on August 13, 2020, 05:15:35 pm
My E3632A does indeed blow the hot air out the back

Did change it with a Noctua and fitted a fan controller
Now it is almost silent
Title: Re: Agilent E3632A dc power supply repair fan & binding post
Post by: tru on August 13, 2020, 05:41:46 pm
No the fan is originally mounted blowing air inwards and therefore air coming out of the left and right side vents slots of the case.  My E3632A has the same exact same Panaflo fan (very noisy) and there is only screw threads on one side of the plastic so was never mounted the other way.