Hi All As per subject really. I have the user manual and service manual, but I need the schematics to debug a start-up issue. This unit has been out of support for 12 years. But it is (well, it was!) a damn good unit.
You can buy a copy of the schematics manual for this unit from:
It ain't cheap!!!
-- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra
Thanks for the link. It's only $60. And if that keeps it going for years to come, it'll be worth it. A 500MHz sig gen of this spec costs much more than $60!
The unit has started working again after taking it apart and re-seating a few cables. Fingers crossed.
You might look over the front panel IC's. I seem to remember one important IC tended to work loose due to the heat sink tab under it.
Thanks.
I had the front panel apart and re-seated all of those ICs too. I did notice one sitting on a metal tab. Looked a bit of a bodge to me. And the IC didn't have a good contact with the tab, nor had an exposed metal bottom!
There are two axial electrolytics on one board. Very gentle pressure on the pcb actually causes one of them to touch another smaller board (which is mostly ground). I don't think that was the problem, but I've trimmed its leads so that won't happen again.
The first problem I had with this unit (about two years ago) was that it would only start in certain orientations. This turned out to be caused by the oven oscillator not starting up. I had to disassemble this, and found that the power wire was wrapped around its pin, but had never actually been soldered. It just rested like that for 15 years!
Yep this is a very complicated signal generator. One weak area is the "noise reduction loop". Hundreds of parts, scads of exotic parts, dozens of critical adjustments, about half of them not documented in any of the manuals. You were supposed to send the unit to Fluke for those adjustments. If you have a working unit, lucky you.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.