How to fix a monitor
ZXNet echo conference «hardware.zx»
Hello Orionsoft
Ori> sparks in the nipple area or anywhere ?
Ori> carefully peel back the skin from the nipple, there should be a hook there
Ori> springs in the hole of the tube
Ori> maybe there is no contact there
I checked the pacifier, the contact is ok.
Sparks anywhere in the area of uninsulated iron wires covering
tube. More precisely in one place, you isolate it, it starts in others. It is also clear that
sparks in the area of the gun inside the tube. If you remove the nipple, it doesn't spark, but the pipe
still doesn't shine.
Hello Orionsoft
Ori> thick wire - this is probably the anode voltage?!
Ori> there should be such a suction cup at the end
Ori> it must be inserted into the connector in the tube itself and then there will be no sparks
Ori> must.
Ori> be careful there is high voltage!
Ori> you need to wait 10-20 minutes after a complete shutdown, and only then
Ori> ...
The pacifier sticks out in the tube. It still sparks. The other end goes to the right (if
look at the back) board.
Hello Mike
the thick wire is probably the anode voltage?!
there should be a suction cup at the end
it must be inserted into the connector in the tube itself and then there should be no sparks.
Be careful there is high voltage!
you need to wait 10-20 minutes after the complete shutdown, and only then...
Hello, spleen
spl> The pacifier sticks out in the tube. It still sparks.
does it spark in the nipple area or anywhere?
carefully peel back the skin from the nipple, there should be a hook that springs into
tube hole
maybe there is no contact there
Hello, spleen
spl> inside the tube.
imho the anode is broken. Khan's pipe
Hello Orionsoft
There is a thick wire running along the perimeter of the screen (around the entire kinescope). It's a loop
demagnetization of the kinescope. Sometimes if she moves too close to
high-voltage terminal of the kinescope (suction cup), a breakdown is possible in this place.
Move as far as possible, additionally insulate with high-voltage
material, if this is the case (electrical tape does not roll).
In addition, there is a metal strip (bandage) along the perimeter of the kinescope,
which is part of the kinescope (the “ears” are welded to it, for which the kinescope
attached to the body). This strip must be grounded (that is, connected to
weight of the apparatus). Check.
I had a case where it broke between the suction cup and the bandage right through the glass
kinescope, it was either dirty there or damp. Wiped it down so it was clean and dry,
- everything stopped. In general, the area around the suction cup should be clean and dry, there is
zone of pure glass, without graphite.
A graphite coating is applied to most of the kinescope bulb. Don't wash it
follows, it is necessary. This coating is also grounded using wires thrown directly across
grounded wires (usually a multi-core braid from
shielded wires). As I understand it, it sparks between the graphite and this braid?
Then it looks like the graphite has been stressed. We need to find where it comes from. Either
There is dirt around the suction cup, or maybe some other malfunction.If possible, it would be good to show it to specialists. It's a shame if
Due to an incorrect diagnosis, a good kinescope will be rejected.
Hello, spleen
If it sparks in the pipe, the pipe is screwed.
Hello, spleen
There is a monitor repair conference, it seems...
Breaks high...
Hello ASDT
ASD> If there is a spark in the pipe, the pipe is screwed.
It sparkles both outside and inside. If you remove the suction cup, it doesn’t spark anywhere, but it doesn’t
shows.
Hello, spleen
spl> It sparkles both outside and inside. If you remove the suction cup, it doesn’t spark anywhere, but
spl> does not show.
Find a book on TV repair. All standard schemes are there.
A possible option is that you have, I don’t know what it’s called in human terms,
but the anode voltage is clearly too high. And it’s really possible to sit behind such a monitor
dangerous. If this is the World Trade Center - it's better to go straight to the trash - THE HUMPED GRAVE WILL FIX.
Hello ASDT
ASD> If there is a spark in the pipe, the pipe is screwed.
It may be so, but it cannot be said that it is always so. Possible on board
Close the kinescope thread so that sparks appear in the neck of the kinescope.
Try, for example, by jumping the terminals of the accelerating electrode and modulator to
a perfectly working kinescope. It will sparkle again... But for this case it is,
It doesn't seem to apply, since when you turn off the suction cup, the sparks disappear.
Hello fk0
fk0> Find any book on TV repair. All standard schemes are there.
fk0>
fk0> A possible option is yours, I don’t know how it is humanly
fk0> is called,
fk0> but the anode voltage is clearly too high. And sit behind such a monitor
fk0> real
fk0> is dangerous. If this is the World Trade Center, it’s better to go straight to the trash heap - HUMPED GRAVE
fk0> FIX.
Electronics 32VTC 202. It’s a shame to throw it away.
Hello, spleen
spl> Electronics 32VTC 202. It’s a shame to throw it away.
Threw it away.
Hello, spleen
spl> Threw away.
Monster :smile:
Hello Orionsoft
And they will charge you the same money as for a new SVGA
Hello, Ball Bess
Can I take it to a TV repair shop?!