Products > Test Equipment

Hitachi Oscilloscope V695 etc.

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chrisnotton:
Good evening all,

I have just acquired one of these on Ebay. I used to have one (that was stolen) in the 80's and found the auto-timebase feature particularly useful for audio applications, and lining up tape machines etc. I have been a Tek guy ever since but recently I find myself working on tape-machines again!  |O This bargain popped up so.............

The scope I bought has a few dirty switches but the only annoying thing is that the trace horizontal is off-centre by about 5mm. I have read all the posts i can find and downloaded the service manual but cannot see an obvious trimmer for this alignment.

Does anyone have the alignment procedure, or know where this adjustment is located? I will have to disassemble somewhat to access the dirty switches but I would imagine that the adjustment must be moderately accessible for calibration.

Thanks in anticipation

Chris

grumpydoc:
When you say "trace horizontal is off-centre by about 5mm" what do you mean exactly?

Photo would be good.

chrisnotton:
The centering; the traces start 5mm. to the right of the graticule. No photo available at the moment. Sorry for the ambiguity! 😉

grumpydoc:
OK, so you've only got half a trace?

Can you use the h.pos control to move the trace (that's selected with the function toggle switch)

Double check you're not in a delayed sweep mode and x10mag is off.

chrisnotton:
I have tried but there is not enough adjustment. I have just found the alignment procedure in a different online manual.  ;)
I am going to study that.
Thanks

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