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Albert,
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Where do I find a diagnostics manual for the 11801? Finding *any* manuals at all has been like looking for a unicorn. Days of searching turned up 11801A/B/C documents. But no 11801 documents. I still get an E5622 error after my misadventure with U511. In my view we really need to get this sorted out before a lot of very fine instruments become junk. Component level documentation for an 11801 would probably have sot $150-200K NRE at the time it was introduced.. Not providing that on a $25K (1989) instrument is obscene. Thanks for your help. Reg -------------------------------------------- On Sun, 3/24/19, Albert Otten <aodiversen@...> wrote:
Subject: Re: [TekScopes] 11801 diagnostic help To: [email protected] Date: Sunday, March 24, 2019, 1:47 PM Hi Reg, You moved the correct jumpers (Fig. 1-1 in the Diagnostics manual). I suppose (just suppose) now that the Exxxx error is too severe. When the battery in the Dallas battery is low, the NVRAM memory chip should still work but lose its content after power off. The corresponding error is T1331. Probably the chip inside the Dallas unit does not function properly anymore, i.e. does not guide the mainframe 5V to the memory chip when mainframe power is present. The scope should power up normally even without any plugins. Of course many function simply are not available then, but you can see things like instrument options and identification. Albert On Sun, Mar 24, 2019 at 04:48 PM, Reginald Beardsley wrote: > > Albert Otten wrote: > > Another possibility to have the instrument atleast doing something is to > bypass the Self test and > Extended Diagnostic tests by setting jumpers J712 and J713 on the I/O board to > the 0 position. These jumpers are difficult to reach with the board in situ, I > found it easier to remove the board and then change the jumper settings. > > The only jumper labeled was J710, so I assumed the number went up went up from > there.? J712 and J713 were set to the right, so I moved them to the left, > replaced the board and powered it up. > > There was no change in behavior. > > In reading the service manual for the 11801 it seemed to indicate that a > sampling head needed to be installed.? I tried it with one of my SD-22s > installed, but that had no discernible effect. > |
