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Some New Updates on the monochrome 9 monitor !!!

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ed12:
u see the :white's: in your pic ?
we call that >blooming<
it is either the screen is to high,or contrast is to high
or your tube is what we call >gunning< down..ie it is to old
rejuv may be in order here

ed

retrotubeguy432:
Yea you are right,if you look at datasheet on TDA 2595 there is VERTICAL BLANKING PULSE on pin 5 and its not going anywhere(look at the schematics),
but I dont get it,there seems to be a connection going to it and from it but from where to where ?  ??? (and what are the two resistors) ?

retrotubeguy432:
Hi there.

I got very bad news,when i was testing something I accidentally shorted the vertical blinking pulse from the TDA 2595 (pin 5) to ground.The crt turn off and would want to start back on.No high voltage,only the heater cums on.I suspect that I shorted the mosfet irf 520 or the transistor BU806,that is mounted on the heat sink.But the TDA 2595 gets hot pretty quickly too hot on the touch(3 or 4 times more hotter then the other ic on the board).How can i test the ic,if its fried or not ?

And is there a possibility that the TDA 1175P also got shorted,when I turn the crt on it gets a bit worm,like before,but not hot like the TDA 2595.(look at the schematics posted earlier)!  :-\
And how could I test the flyback to see if its good the easiest way ?

(somebody help me please !?!   :cry:

Victor303:
Hello,

i have the same 9'' monochrome monitor from a Sinumerik 810M. Its a Magnetek 579417TA. On your picture i see your 16 pin flat cable. Do you have the exact pinout off the connector (15V, 0V, Video, Sync,...)?

Best regards

retrotubeguy432:
Well I fixed the monitor,the TDA 2595 was shot so I have replaced it and also the power transistor and the one that goes in the flyback itself.
As you can see on the pictures there are like 7 potenciometers (one is in the back) that were replaced by these small blue PCB potenciometers and
6 switches that allow me to reconfigure the Crt circuitry back to the industrial.

Right now I can connect any composite signal into this thing,but if I reconfigure with the switches back,like it was wired originally,I
can still input separately Video,Horizontal sync and Vertical sync like it was original.separately  ;)
Some pictures of the thing.I built the wooden box for it.

THIS MONITOR IS ONE OF A KIND (that I build,was a real pain in the face to rewire it all,so that the CRT would sync the video)   ::)

Hy Victor303
You also have the same monitor,does it work,you also get those lines when powering it up ?
   

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