My 2445 had a bad A5 board so I bought a replacement on Ebay (don't laugh please)
There are a few unsubtle differences
Original Replacement
J652 20 pins 26 pins
W512 34 pins 26 pins
Have I bought a pig in a poke or is there some possible resolution
Cheers
Mike
J652 with 20 pins and W512 with 34 pins is consistent with the schematic for a 2445A or 2445B. Is that not what you have?
Maybe someone put the wrong nameplate on the scope? They do come off.
Based on the number of pins, the replacement board you received is for a 2445 or 2465 (plain, not A or B). To further confirm, an A5 control board for a 2445 or 2465 will have a part number on it of the form 670-7279-xx. An A5 control board for an A or B version would be 670-9052-xx.
The two board types are not swappable.
Unless it's severely damaged, it's usually not too difficult to fix the boards in these scopes at the component level.