[Philips210]

Hi Roger.

Both Channels 1 and 11 are affected in the same way. From your good advice, depressing both the Dual button and the Add/Chop button results in a normal scan. That's giving me a little more confidence to solve this issue, although it's quite complicated working out how everything works. It would have been good for Hameg to have provided a circuit description.

I suppose it's best to first check around those switches. Unfortunately the scope has been out of use for a few months and was in a damp location which couldn't have helped matters.

These scopes are quite well made and what I like about them is very little in the way of exotic components so they should generally be repairable. I did a repair on this scope about 8 years ago which was due to a faulty bridge rectifier, BR1003 (B250 C1500) located on the timebase board.

Regards
Symon