Hitachi V-1060 squealing and no display - diyAudio
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Old 5th February 2015, 06:32 PM   #1
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Default Hitachi V-1060 squealing and no display

When I turn on the oscilliscope I hear a high pitched squeal and no display. I would like to get this scope up and running and have the manual.

Anyone know what causes this?
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Old 5th February 2015, 06:34 PM   #2
Mooly is offline Mooly  United Kingdom
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Wild guess without seeing a circuit... a problem with the flyback generator, maybe dried up caps, maybe a short off the tranny, maybe an internally shorted tranny.

Edit... tranny as in flyback tranny
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Old 10th February 2015, 12:19 AM   #3
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The manual for the V-1060 is not great but does give a fair number of voltage readings. Check the HV transformer (T1013), the 2 internal diodes, C1031 through 1034 and all components around the transformer. Be careful though, in working condition the voltages in this section are quite high! Unplug the tube socket and listen to the squeal. It is possible the CRT is shorted. E
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Old 10th February 2015, 12:49 AM   #4
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Well do, I found two caps 22uf/100v that are bulging out of the bottom. Both caps are across the 55v supply. Once replaced I will unplug socket and check for squealing. Micky or Mooly, do either of you know where I can get replacements for the CRT or the Flyback Tranny for this scope? Micky, thanks for the heads up, although I've spent some time in the back of TV sets and drawn an arc or two, its been a few year's!
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Old 10th February 2015, 06:27 AM   #5
Mooly is offline Mooly  United Kingdom
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The tranny will be pretty unique and only used in that series of scopes. Hitachi spares is probably the only realistic source of a new one (or try and pick up an old scope off ebay)
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