Yoke coil problem in dell CRT monitor - Dell E773C 17" CRT Monitor

Not yog, YOKE. The part with all the coiled wired that slips over the end of the crt. The part will be VERY difficult to locate because the CRT's are no longer manufactured, so neither are the parts for the crt such as the yoke. In any event, if you do find one, it is a pain in the ....to replace as you must completely re-align the picture after you change it. Not really a do-it-yourself thing ig you don't understand how that process works. It's usually a 2 or 3 hour job, plus the part, so really with the cost of the new monitors being so low and the incredible picture on the new ones? It's really not worth repair.

yes even with out the yoke and crt you can switch on the tv, you can check the primary supply 135v going to the horizontal section.

Flat panel TVs don't have a yoke - that's the deflection coil for a Cathode Ray Tube (CRT) as used in older non-flat TVs. Some CRT TVs and monitors had flat screens (i.e. the face is flat) but the overall package isn't.

So I'm not sure what it is you want to do. If you are trying to get a computer monitor to display TV signals, use a video capture device (there are many). Some work with a computer, some don't. But you can't just feed the video into a computer monitor unless it is made to take it (usually with an RCA or BNC connector vs. VGA, DVI or HDMI connectors).

replace flyback and yoke<br /><br />

check connections of R.G.B.and 15 pins to end thenif ok then check positive Vcc at the ic on crt base if less than 12v then check regulater ic if faulty replace it display also can be corrected by adjusting ring magnets on yoke coil

I am sure you have open the casng of the monitor.
Try to look for cold solder ( dry solder ) pin around the horizontal yoke connector and touch up the solder joints.Or either horizontal yoke coil is open.
Caution: not to touch if don't have knowledge of the circuitry .
Solder it the while power is off.
The input is 240v AC and output at the Anode Cap Appox. 28000 volt for 14 -15" monitor.
Have a try.

The part you want is called a "yoke", and not a "York". This is the electromagnetic coil that fits on to the neck of the CRT, and makes the magnetic field from the scan amplfiers to scan the the beam.

I don't know if you realize that when changing the yoke, the purity and convergence alignment will have to be done on the set. This is a job task that requires skill and a lot of practice. Not many service techs are very good at this type of setup. There are specific calibration patterns used for this type of setup. When changing the yoke, it is very common that the ring magnet assembly (convergenc and purity magnets) that is behind the yoke must also be changed. Some yokes come with this assembly together, depending on the model of yoke.

Some manufactures do not sell the yoke separately from the CRT. When the CRT is replaced, it comes with the yoke and magnetic assembly.

An interesting question would be is, how did you determine that the yoke is actualy bad??? It is extremely rare that this type of part fails.

Parts for CRT type sets are getting very scarce. Because the market for spare parts for CRT sets is decreasing very quickly, the clone part manufactures are also not making the generic type dedicated parts.

A way to have parts for your TV set would be to search for a used set that can be used for spare parts. You will have to hope that the same parts you need are also not defective in the used set.

In my opinion, if the yoke is actualy bad, I would be shopping for a new set rather than go through all this trouble. The LCD TV sets are excellent. There is no way that your CRT set will ever be able to perform like the new LCD sets.


Jerry G.

Yoke is the coil assembly that is around the neck (thus the name yoke) of the CRT tube. There is one coil that controls the horizontal sweep and another for the horizontal. As the electrons stream from the guns (or emitters) in the neck of the tube, they pass through the magnetic fields from these yoke coils and get deflected to exactly the right spot on your screen. Pretty rare to have a yoke failure though. Good thing you have a warranty.
Hope Ya Fix It!

Part # 247674 2 Watt 220R

Most likely width control circuit has developed a problem. Most common causes are a failed diode in the yoke return circuit or open capacitor near the flyback.