EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: strawberry on February 22, 2022, 03:34:55 pm

Title: 34901A repair
Post by: strawberry on February 22, 2022, 03:34:55 pm

Is it possible to replace MCU ?
blown temp sensor. temp sensor SDA SCL 100.. 700ohm . seems all 3 card ID ports are 5..7ohm

Title: Re: 34901A repair
Post by: m k on February 22, 2022, 06:56:04 pm

What is it?

My guess from picture is ATmega.

For the question I'd say that hardly.
Manufacturer can of course give you a filled one, or sell for nominal fee since you're so good customer.

Title: Re: 34901A repair
Post by: DeepLink on February 22, 2022, 07:15:06 pm

It's a 8051 with internal program
Guess that you cant buy a spare from HP

There are loads of counterfeits on the marked of these modules

Title: Re: 34901A repair
Post by: strawberry on February 22, 2022, 08:15:13 pm

intel N87C521
some made front panels
could be possible to read serial and make on something like 328