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E4418B

 

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Hi to all in the group.

I am new to the group and I want a help if anyone can.

I have the E4418B in a perfect working condition with one exception in the Power on sw.

It is not working at all and the instrument is always on .

It is not bothering me because I am closing the master sw in my bench , but I want to fix it if I can.

I have the 2 service manuals that I can find in the web , but no one has any schematic diagram nor any info about this problem.

I appreciate any info about this problem of mine.

?

Thank you all.

Nick

SV1VS
 

Hi if you go to the Files on this sight and look in the file for the 4418B you will find a host of manuals also most if not all the service notes for the 4418B
 

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Thank you, I will do it and I will come again if I will be unable to resolve this problem.

Thank you?
Nick
SV1VS?



Sent from my Phone.?


-------- Original message --------
From: Paul Bicknell <admin@...>
Date: 8/25/24 14:04 (GMT+02:00)
Subject: Re: [HP-Agilent-Keysight-equipment] E4418B

Hi if you go to the Files on this sight and look in the file for the 4418B you will find a host of manuals also most if not all the service notes for the 4418B
 

I had a similar problem with mine, the power button barely worked at all.
?
It turned out to be a worn out mylar button membrane under the rubber button caps.
?
You can buy them relatively cheaply on Aliexpress and Ebay if you shop around a bit and they aren't too hard to replace.
?
There are a couple tricks to do the replacement though, so report back if you do decide to replace it and I can help you through it before you accidentally break something. :)
?
It's also worth replacing the internal battery too before your instrument gets amnesia and forgets what it is (model and revision data etc is kept in battery backed RAM), just be sure to take photos of all the serial number and revision number data in the menu there somewhere.
Keysight have simple instructions on how to reprogram the model data, as long as you know what it is... ;)
?
?
Regards
Jared
 

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Dear Jaret hi.
Thank you for your reply. I had a suspicion that it my be the button in the panel. I will order a set and I hope that it will resolve the problem because I can't find any problem in the circuits .
Thank you again.?
My best regards?
Nick
SV1VS?



Sent from my Phone.?


-------- Original message --------
From: "Jared Cabot via groups.io" <jaredcabot@...>
Date: 8/26/24 19:36 (GMT+02:00)
Subject: Re: [HP-Agilent-Keysight-equipment] E4418B

I had a similar problem with mine, the power button barely worked at all.
?
It turned out to be a worn out mylar button membrane under the rubber button caps.
?
You can buy them relatively cheaply on Aliexpress and Ebay if you shop around a bit and they aren't too hard to replace.
?
There are a couple tricks to do the replacement though, so report back if you do decide to replace it and I can help you through it before you accidentally break something. :)
?
It's also worth replacing the internal battery too before your instrument gets amnesia and forgets what it is (model and revision data etc is kept in battery backed RAM), just be sure to take photos of all the serial number and revision number data in the menu there somewhere.
Keysight have simple instructions on how to reprogram the model data, as long as you know what it is... ;)
?
?
Regards
Jared

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