| 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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