Wei-Ya 1220H Chassis Replacement FAQ/Summary

[MonitorGuru]

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[wakerlet]

You may want to edit this line in your original post.

[Ken Layton]

It would help in regards to width issues to know what type of video signal is being applied: gameboard (if so, what game), computer, video pattern generator, etc.

Some gameboards like Power Instinct and Mortal Kombat generate a narrower than normal picture thus neccesitating a change in the value of the width capacitor.

One thing I would like to suggest that everyone contact all of these companies selling the replacement chassis to request normal monitor 2 pin Molex connectors be put on the power cord. It would save alot of hassle and grief when someone 'accidently' plugs the monitor into a wall outlet because it had a regular power cord on it.

[Ken Layton]

Ah yes that would help to have consistant test parameters.

Personally, I like to use Street Fighter 2's video for game play looks and it's built-in video test pattern for setting the color guns. The video test mode is excellent.

[Ken Layton]

Street Fighter 2 boards are very common and you can get 'em cheap on ebay. We got one for $25 on ebay.

Street Fighter 2's video color setup has red, green, blue, and white staircase bars on screen at the same time. Makes color adjustments a snap cause you can see everything at once.

[Ken Layton]

On the 1220 crosshatch distortion, it could be some ringing in the yoke (yoke slightly incompatible) or the tube has some slight screen voltage differences, or it could even be brightness/contrast a tad too high.

On the 826, the overscan is because it's made for a 25" to 27" tube. If you had a schematic you could change the value of the width capacitor to reduce the pic width. The pincushion problem is probably due to the yoke on that tube. You may have to by the correct matching yoke and try it out.

[wakerlet]

Thanks for the write-up.  Any chance you could get the Vertical resistance values in there?

-Todd

[Ken Layton]

Well, now that I've been able to view some of the Wei-ya pix on Oscar's site, I can see that some of your "focus/blooming" problem stems from the color drive controls being set too high. You really need to use the Street Fighter 2 board for color setup. It has 20 step staircase color bars which helps set the colors much more accurately & quickly.

I see in one picture that the blue is set too high.

On many of the Kortek monitors there are 3 color pots right next to the video input connector that can cut/boost color level coming into the monitor. I don't remember if this Wei-ya had that feature or if all the color controls were stricly on the neck board.

On this thread, how about a picture of the 1220H chassis? The pic on Wei-ya's website is too small and too low of resolution to see anything on the chassis.