Quote:
Originally Posted by Barry777
I took care to make sure the switching point is properly adjusted at 6.5H for recording and 4.5H for playback in the menu adjustments - but I know the software controls can only do so much if the circuit itself is faulty.
So now it's starting to look like an electrical alignment issue.
Sounds like an ESR meter is great for in-circuit cap checking? Which one would you recommend?
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Are you looking at the head switching signal in one channel and the video in the other channel on an o'scope? I figure you are. PB sw-pt should obviously not be at the top of the picture. Sounds like the old symptom of a surface mount electrolytic in the head drum PG circuit, not producing a good PG pulse so the servo knows where the heads are, the FG is working since it's running at the right speed. A lot of those combined the FG and PG on the drum stator board into a single signal the servo IC could sort out. The cap that would fail on those was on the drum motor stator board.
About a year ago I bought my 2nd ESR meter in kit form:
http://www.anatekcorp.com/blueesr.htm
If you shop around for this one, you can find a deal that might still include the optional stand for it, free.
I also still have my original Dick Smith Electronics from Australia ESR meter, from about 10 years ago. It was also a kit, but it's been discontinued for a few years.
http://www.electronicrepairguide.com...or-tester.html
I'm not sure what's available these days, but I think there are some lower cost already assembled ESR meters. Others I see are now combining ESR and capacitance test in one meter.