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Author Topic: 34901A repair  (Read 644 times)

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Offline strawberryTopic starter

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34901A repair
« 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
« Last Edit: February 22, 2022, 06:41:53 pm by strawberry »
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Offline m k

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Re: 34901A repair
« Reply #1 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.
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Advance-Aneng-Appa-AVO-Beckman-Data Tech-Fluke-General Radio-H. W. Sullivan-Heathkit-HP-Kaise-Kyoritsu-Leeds & Northrup-Mastech-REO-Simpson-Sinclair-Tektronix-Tokyo Rikosha-Triplett-YFE
(plus lesser brands from the work shop of the world)
 

Offline DeepLink

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Re: 34901A repair
« Reply #2 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
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Offline strawberryTopic starter

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Re: 34901A repair
« Reply #3 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
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