Re: Intermittent fault in Eizo 19" T766 CRT



On Friday 25 April 2008 18:38, James Sweet wrote:

I would suspect bad solder joints in the area where you can induce the fault
by tapping. It *may* be a short inside the CRT, but don't condemn that yet.
Don't worry about discharging the capacitors, just unplug it for 10 minutes
or so and it should be safe. Even when you're sure everything is dead, treat
it as live just in case.

And what about the CRT? Is discharging as I described safe?

When the fault is in the CRT, I assume nothing can be done? Well, let's just
hope it's not that; those Sony Trinitron tubes are pretty good, so I guess the
chance is small. But on the other hand, because after a fault, the screen is
greenish, which turns OK over the course of about 30-60 minutes, heating
cathodes may very well be it. The cathode assembly itself doesn't heat up that
fast.
.



Relevant Pages

  • Re: Phillips/Magnavox Chassis 25800
    ... This type of fault can get complex, and require a lot of patients. ... If the CRT is defective, the set may also go in to the protect mode. ... Turn set on and High voltage comes up to about 28K and the set shuts down. ... I did find the Vert IC shorted pin 6 to pin 5 ...
    (sci.electronics.repair)
  • Re: Sony Black Trinitron 24" with weird colour (pink)
    ... Its not falling crt emission, ... voltages compare to the other 2 colours. ... If the fault is the crt, you might be able to burn off an internal ... There is also the final possibility of very low green emission plus ...
    (sci.electronics.repair)
  • Re: Please help in identifying TV picture fault.
    ... >is, he is going to have to check the G2 bias, and the biases to the CRT. ... >It is possible to have a bias fault to the CRT, a supply fault from the ...
    (sci.electronics.repair)
  • Re: Intermittent fault in Eizo 19" T766 CRT
    ... And what about the CRT? ... Is discharging as I described safe? ... When the fault is in the CRT, I assume nothing can be done? ... The 22" flat trinitron tubes commonly have intermittant focus issues, ...
    (sci.electronics.repair)
  • Re: Sony KV-36XBR400 no HV
    ... Try removing the CRT socket board from the tube. ... horizontal output section that causes this type of fault. ... is a vertical deflection failure, the horizontal output can go to the ... seen a defective CRT put the set in to the protection mode. ...
    (sci.electronics.repair)