DIYbanter - View Single Post - Strange focus error on Oscilloscope Hameg HM1005

N_Cook

Geo wrote in message
...
On Mon, 12 Jan 2009 00:03:35 -0800 (PST), wrote:

I found out that when I set the trigger switch to LINE (~), the
sawtooth shows only every 10th tooth, the rest of the time it's GND
level. The trace looks like a bright spot on the left and a really dim
line to the right.
Good description of the hold-off control being in the wrong position.

The schematic is available from hameg.com, look under manuals.
I looked but the manual I found was only 28 pages with no schematics -
url?

--
Geo

Thanks for the heads-up
I downloaded the manual for my usual low spec scope HM412-5 and the schema
are in there. I've previously repaired it blind (CMOS 4011 failure of all
things).

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/