7045 Solatron Enertec Schlumberger

[radiolo]

Hello,

I found on the forum the drawings of this DWM, and I success in finding the trouble : an OP amp is died ( LF356)
But i think that it would be usefull to recalibrate this section: ofset pot on the OP and gain ?

Somebody have the full documentation with the calibration procedure ?

Thanks
Best regards
Radiolo

[WME_bill]

Solartron 7045. I attach the full operating and service manuals. There is not a lot on calibration as such. I suppose because it is so straightforward; set for correct reading at one point on each range. But it does contain principles of operation of the digital part and some waveforms which are helpful when fault tracing. The vital thing is the main Integrated circuit, (IC8 made by Plessey). It tends to fail, and is no longer available, with no alternative commercial equivalent. I had to dump six of these meters several years ago, all with the same IC failure. Your LF356 failure should give no difficulty. Industry standard IC, from lots of makers. Bill m0wpn

[radiolo]

Hello

Thanks WME bill for the calibration pocedure.
IC8 seems to be in good condition the onlY failure was LF356 and is now be changed.
AC is operating and I have only to check the calibration.

Radiolo

[delta925]

Thank you so much for posting this.
We have been looking for a while and failed to find it.

[goldvasser]

Thanks for this virtually "impossible to find" document !
Now my Solartron is back to a normal life !!! (an escaped from the wreacks !)

[duncanlowe]

The information on this site is invaluable. I have rescued a 7045 where three out of four Tantalums in the PSU had failed short circuit. Replaced all four with modern electrolytic and it now works fine.