Hi Guys!
I got Fluke 1653 tester with the typical ERR1 message. After an intense check I would guess that the electronic is fine.
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Another user in this board wrote about the differences in communication between a working and a not working unit.
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My device has exactly the same bahviour. The communication between the measurement and display controllers shows quite clearly that the problems is the microcontroller (MSP430f149) - or the software in it. To evaluate that I startet an approach to read out the firmware. It worked! The JTAG protection fuse was NOT blown!
To verify that the controller is fine and the downloaded software is working I replaced the MSP430f149 with a new one and programmed it with the old firmware. The communication output is the same.
Means - the controller is not the problem and reading out the firmware works!
The only thing is that the ribon cable to the display unit must be removed after starting the tester and before downloading to avoid that the controller has to react on the display controllers commands. No clue why but without this step I got a different read out with two programmers. I used an ASIX Presto and a TI MSP-FET.
Now my cry for help: could anybody read out the firmware of a working unit and share it with me? My tester is a 1653 (1651 - 1653 should have the same formware).
Thank you very much for your help!
Photon