HP 3457A - Powered up and saw POST Error and then the magic smoke

[cbelcher2020]

My ultimately reliable HP 3457A Meter finally had it's first failure, not bad for 30 years?  Powered it up, saw a POST error out of the corner of my eye.  Went to get some water and came back and no power, main fuse was blown.  Smell told me tantalum cap but my nose pointed me to the general area of that Schaffner Line Filter or the transformer on the Common Chassis PS.  All checked out?  Opened up the Floating Common PSU side and started poking around.  Found a dead short on the -15V output.  There it was, I knew that smell all to well.  C922, big black ring around the entire package and wide open.

All it's identification mostly unreadable, schematic and HP parts list said there was several others used in this chassis.  On the hunt to see if I could find one or more of the others.  Found several of them, Sprague 35V 1uF Tantalum's.

That lead me to:

Reference Designation: A11C807
HP Part Number: 0180-0291
CD: 3
Quantity: 3
Description: Capacitor - Fixed 1UF +- 10% 35VDC TA
Mfr Code: 56289
Mfr Part Number: 150D105X9035A2-DYS

Found a modern Vishay Sprague part:
Manufacturer Product Number: 150D105X9035A2BE3
Description: CAP TANT 1UF 10% 35V AXIAL
Digi-Key Part Number: 150D105X9035A2BE3-ND

Should be here today, also picked up Line Filter since everyone says they've had issues with them failing.  It's open, I'm getting all that tantalums replaced! I want this to last another 30 years.

Keep everyone abreast if this solves it.

Fuse part number if you need one:
Don't use this in 220 or 240v regions!
Fuse for 95 to 132Vac Operation:
.2 AT HP Part Number 2110-0235 or equivalent,  HEaton Bussmann MDL 2/10 Time Delay glass fuse
Dimensions 6.4x31.7mm

Digi-Key Part Number: 283-3393-ND
Manufacturer: Eaton - Electronics Division
Manufacturer Product Number: BK/MDL-2/10-R
Description: FUSE GLASS 200MA 250VAC 3AB 3AG


 

[cbelcher2020]

She lives.  New Line Filter, all new caps.

Working like a champ.  My babies back.

[alm]

Congrats on the repair and thanks for sharing the outcome.

[Swake]

That soldered spade connector on the line filter is a pain to remove.
I'm swapping them out as soon as I discover them. Same issue as the stand alone RIFA caps.