Maker Pro
Maker Pro

I need to get a HP 54121A Test set repaired. Its trigger input works intermittently

ks1974In

Jun 30, 2018
4
Joined
Jun 30, 2018
Messages
4
I need to get a HP 54121A Test set intended for use with a HP 54120A oscilloscope repaired. There is a problem with the Trigger input-It works intermittently. Does anyone know where I can get it repaired? Or failing that, how I can repair it myself?
Thanks,
Sagar Kapadia
 

Harald Kapp

Moderator
Moderator
Nov 17, 2011
13,763
Joined
Nov 17, 2011
Messages
13,763
the Trigger input-It works intermittently
Is th eintermittent operation linked to anything you do with the equipment, e.g. when you move the connecting cable or the unit? Intermittent operation is often caused by a bad connection or solder joint. A visual inspection plus tapping against any suspect connections may reveal the culprit. Repair should then be obvious. Open the unit and check internal connections, too, including solder joints on the PCB(s).
Unfortunately there is probably not much more you can do yourself.

Does anyone know where I can get it repaired?
Not me, sorry.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
Jan 21, 2010
Messages
25,510
There is a full service manual available here. You will have to register (kinda) to download it.

It has everything short of the schematics.
 

ks1974In

Jun 30, 2018
4
Joined
Jun 30, 2018
Messages
4
Is th eintermittent operation linked to anything you do with the equipment, e.g. when you move the connecting cable or the unit? Intermittent operation is often caused by a bad connection or solder joint. A visual inspection plus tapping against any suspect connections may reveal the culprit. Repair should then be obvious. Open the unit and check internal connections, too, including solder joints on the PCB(s).
Unfortunately there is probably not much more you can do yourself.


Not me, sorry.
Thanks Harald
 
Top