Products > Test Equipment

Teardown - Hitachi V1065

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grumpydoc:

--- Quote from: rbm on August 17, 2018, 09:14:11 pm ---A first step might be to replace capacitors on the boards.  They might have aged badly.

--- End quote ---
I'm afraid it looks like physical damage to the CRT

ulyanoff:
Thank you all. If the CRT tube has physical damage, then I think there is a vacuum loss and no trace is displayed on the screen. All secondary voltages from the power supply unit are checked and correspond to the circuit. After few days I will back with results.

grumpydoc:

--- Quote from: ulyanoff on August 19, 2018, 07:34:38 pm ---Thank you all. If the CRT tube has physical damage, then I think there is a vacuum loss and no trace is displayed on the screen.

--- End quote ---
Not always.

The CRT has a number of internal structures made of glass which can be damaged by mechanical shock, as well as the horizontal and vertical deflection plates.

Eg see this thread https://www.eevblog.com/forum/repair/tek-2211-crt-weirdness/ for a 'scope with similar display problems.

ulyanoff:
A bit sad message, most likely now I'm looking for any version of the CRT Matsushita 150DGB31. How do you think how realistic it is to find? Also additional , maybe someone needs an entire oscilloscope or some parts or block from it. You can consider the option.

Moonbase:
Seems this thread’ll never die. Ever. :-)

Thanks to all for the teardown, photos and especially the search for S1603!

Unbelieveable how time flies … I’m the proud owner of a VC-1065C for about 30 years now, and guess what: After having neglected my beauty for about 10 years now, I took it into service again and promptly S1603 (the selector switch) stuck—in SINGLE mode! Aargh!

I’m a sentimental guy. Guess I want to spend a few more years with this beaut old lady … So, please, anyone got a spare with the original paddle? Or do I have to try DigiKey’s 360-3390-ND (A28KB-BH)?

It wasn’t clear from the above if the poster had luck with this part. Would it be a functioning replacement for the original? Or did anyone find a switch where I could reuse the old original olive-coloured paddle with?

Thanks!

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