EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Electro Fan on August 17, 2020, 03:24:30 am
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As can be seen in the image below the vertical readout has dropped too low on the 2247A display (the "RUNNING" line should be higher rather than dipping below the display bezel).
I haven't been able to find the 2247A documentation yet but I think I found the same basic info for the 2246.
Attached is an image showing the procedure for the 2246 which shows the first steps as getting into the service menu from the front panel display. I've done that on the 2247A - easy enough. The instructions then say that it is necessary to align some dashed lines - but I think that might require going inside the scope to adjust R703 and R260. Another of the images shows that these adjustment points can be found on the schematic at 3J and 3M; and that they can be found on the board at 4F and 9H.
Unfortunately, I don't have the board layout info for the 2246, much less the 2247A (not sure if they are similar, or not, with respect to the parts and the layout/location).
Anyone know if I'm on the right track with interpreting this procedure, and anyone happen to know where on what board these adjustment points might be for the 2247A, and if possible - how to best find/get at them once I take the cover off the 2247A?
Thanks!
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Ok, some progress. Found the 2247A documentation showing the board location of the R260 and R703.
Now just checking to see if I'm on the right track with interpreting this procedure, and if possible - how to best find/get at these two adjustments points after I take the cover off the 2247A?
Looks like these 2 adjustments are intended to be made while the unit is AC powered on?
Thanks
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weekday bump