I recently got my 2465B through ePay from Italy, and it arrived safely.
I asked the seller to carefully pack it, surrounded by soft foam, and he did. Kudo's to him for that!!
Last week I started working on it.
It has the "all SMD" A5 board with the Dallas chip, and it started with no beam and stopped it selftest with the "ADD" light lit.
As it turned out, I could see the 05 FAIL 44 after I tweaked the GRID Bias.
I went to look for the 4x SMD caps, and yes, they all had been leaking and all of their values were down in the 10-30 nF range... ;-)
After replacing these (not really nice, because there were PCB-tracks eaten away as well) it still gave the same message.
It turned out the R2013 (10kOhm, part of the front panel DAC reference divider) was up to 35kOhm, this explained the "high voltage" error.
Somehow this type of 0,1% resistors are more susceptible to the electrolytes than the normal SMD ones?
I replaced it with a new 10kOhm et voila, problem solved!!
BTW, some people report this being a 0,1% resistor for accuracy, but I replaced it with a normal 1% metal film resistor. (true, I selected one of 10,002 kOhm with my Keithley 2000)
In my humble opinion this reference is "only" used to select the front panel settings, and not for measurements, so I think it is not really super critical.
It is true it must be stable, to not unwillingly change scope settings based on temperature changes...
Note: feedback I got from the Tekscopes group at Yahoo indicates my assumptions about the use of this DAC divider are not completely true. It appears this DAC -and so the divider!- are involved in measurement, so also in accuracy. At least a check of the calibration is necessary, so maybe a calibration as well.
Today I decided -after reading ALL of this thread!! and nothing else to do on a sunny Sunday- to go all the way, and recap all the electrolytic's and also replace the Dallas chip.
so I ordered the caps, heat sink, socket and Dallas chip at Mouser Europe, and now I have to wait.... (last time I ordered at Mouser Europe, they still shipped from the US, but no tax/customs issues though..)
Yes, although my scope has a Tek U800 thats is not getting hot, I will put an heatsink on it.
I ordered a few of these to see if they will fit: http://www.mouser.es/search/ProductDetail.aspx?r=532-507222B00
Mine was build in Holland, Heerenveen, the serial-number starts with H706xxx, so in a way, it found its way back home.
(Not really, although I am Dutch, I do live in Spain.... ;-)
Will keep you all posted,