Author Topic: HP 16533 vs 16534  (Read 2023 times)

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Offline fisafisa

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HP 16533 vs 16534
« on: February 11, 2016, 11:03:13 pm »
Hi
I have just got hold of two 16533.
I inspected the boards and noticed that the PCB is infact of a 16534 and that it was relabelled 16533.
I have also noticed 2 resistors that have been changed near the main chip.
The two values are 1MOhm and 0.

I wonder if this is an attempt to change the card to 16534?
Anybody has detailed pictures of the two boards, so that I can compare them?

Thanks
 

Offline fisafisa

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Re: HP 16533 vs 16534
« Reply #1 on: February 12, 2016, 03:58:42 pm »
Here are the photos of the card

The folder:
https://www.dropbox.com/sh/2rw2yf4dsdkx0zf/AABbXunP1vkF7xeaC5_B7lmua?dl=0

An overview:
https://www.dropbox.com/s/ribu2nt1sa8uwrf/16533-A1.jpg?dl=0
https://www.dropbox.com/s/2ffdzlhjwwncvgz/16533-A2.jpg?dl=0

In the folder above there are zoomed in photos.
Also contains pictures of the 16555D card

 

Offline gslick

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Re: HP 16533 vs 16534
« Reply #2 on: February 12, 2016, 05:06:44 pm »
Here are some photos of a 16534A that I had. I sold this one to a friend recently. I still have a couple more left.

https://goo.gl/photos/n157WK1RqNCaWycN6
« Last Edit: February 12, 2016, 05:08:27 pm by gslick »
 

Offline fisafisa

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Re: HP 16533 vs 16534
« Reply #3 on: February 12, 2016, 08:03:02 pm »
Thanks
The resistors are swapped compared to 16534
Everithing else seems to be exactly the same.....
So I guess the previous owner tried to convert a 16533 into 16534 by swapping resistor and mimic the 16534.
Simething must not have worked as it left the resistors in a configuration different from 16534.
Now I need a picure of a 16533 unmodified to confirm my guess.

I also guess that the 16533 and 16534 differ in the main FPGA programming....

Cheers
 


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