XJ4241 Scope from China.

[Anton2000]

I'm trying to restore this scope . made in China in the 90, sadly after high voltage caps puffed out, and i made a full recap  one channel does not work. I have manage to find the damage part a amplifier? IC named SG012 IB but I can't find anything on the net about it, i'm sure it is the problems as if I replace it with the one from the other channel it works... (kinda... as the positioning is not working at full range)                                                                                                                                       I'm looking for any advice. a equivalent a datasheet anything at all.                                                                                                                               

[fzabkar]

I thought it may have been a Silicon General part, but I couldn't see it in their 1990 catalogue.

http://www.bitsavers.org/components/siliconGeneral/_dataBooks/1990_Silicon_General_Product_Catalog.pdf

A better photo might help me to recognise the logo.

[Chris56000]

Hi!

That circuit diagram definitely needs one of my redrawing projects starting!

I  knew I've seen that pinout before – try an LM592 Differential Video Amplifier to replace it – the device's datasheet and the device itself are easily got – it has a Russian equivalent 1YO592P readily available cheaply!

Chris Williams

[jxjbsd]

Someone discussed this IC in our forum. It should be similar to uA733   LM733

[Neomys Sapiens]

Hi!

That circuit diagram definitely needs one of my redrawing projects starting!

I  knew I've seen that pinout before – try an LM592 Differential Video Amplifier to replace it – the device's datasheet and the device itself are easily got – it has a Russian equivalent 1YO592P readily available cheaply!

Chris Williams

That one is also known as SE592, TL592 is related
Differential Video Amp.,  adjustable Gains /Passband, 90MHz@100, 40MHz@400, 7.5ns, Rin4kOhm/5pF,
Vs +/-3...8V. but Pinout may differ