Hello Keithley fans!
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
I got my first 2001 (actually 2001M)
#1 a one year ago. It mentioned in this thread. It is working properly and regarding to calibration date string it was calibrated in 2012.
I also got another one 2001
#2 not working from eBay without cover and board shield.
Analog board revision
K. Digital board revision
J. ADC board revision
G. Firmware version
A06.
![](http://s13.postimg.org/viubtd95f/image.jpg)
Desolder caps and see familiar picture:
![](http://s13.postimg.org/tej5jrmab/image.jpg)
Board washing/cleaning:
![](http://s23.postimg.org/3us9d84fb/image.jpg)
New caps soldered (thanks to
TiN ![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
):
![](http://s17.postimg.org/bqft4wk3v/image.jpg)
Replaced leaked 1000 uF caps on the digital board with new 2200 uF as well.
Also some retrobright experiments:
![](http://s17.postimg.org/foc9lslor/image.jpg)
...and result:
![](http://s22.postimg.org/yz8ruahnh/image.jpg)
After power on the VFD does not display anything. The problem was in burned DC/DC converter on the digital board.
After replacing (taken from 7001) the VFD start working. Multimeter operates good except some errors:
200.1 A/D Zero
200.6 x0.02 Line Cycle Integration
200.7 x0.01 Line Cycle Integration
201.2 7V Reference
SKE encountered with the same errors:
Self test reported these error codes:
200.1 A/D Zero
200.6 x0.02 Line Cycle Integration
200.7 x0.01 Line Cycle Integration
201.2 7V Reference
Did you find a solution?
What I tried to do to localize the problem:
1. Insert ADC board from my working 2001M #1 to #2 - same errors 200.1, 200.6, 200.7, 201.2
2. Insert ADC board from #2 to 2001M #1 - no errors
3. Insert digital board from 2001M #1 to #2 -
no errors!4. Insert digital board from #2 to 2001M #1 - same errors 200.1, 200.6, 200.7, 201.2
Looks like the problem is defective digital board. In the meanwhile I can do all measurements with unit #2 without problems. So the analog <-> digital board communication works properly.
I also expected damaged EEPROM and tried to load various images to EEPROM which
TiN posted without luck.
Are there any thoughts?
Thanks,
Andrey.