25 inch WG 4900 style chassis: horizondal width coil?

ifkz

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Help ID'ing 25 inch WG 4900 style monitor & horizontal width coil failure?

I need help ID'ing this monitor.

It looks like a normal Wells Gardner 4900 chassis except for a small add on card (1 inch x 1 inch) that controls the vertical position. The card has a pot and a transistor. It is hooked up to a 25 inch tube. What is the model number? I need a cap kit from Bob Roberts.

What are the symptoms of a horizontal width coil failure?

This is mounted vertically and the image refuses to stretch across the screen horizontally (black bars on the left and right sides of the screen). I know it needs a cap kit, but I am wondering if this is something worse. Will a horizontal width coil from a regular 4900 chassis work as a replacement?

I know a cap kit is the first place to start, but I've never seen one quite this bad. Cold solder joints are probably on the chassis too.
 
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Ahem, I believe I mentioned that it's a K5500 chassis, no? :D

Okay, I checked some manuals, and the only one I can't find is the manual for the standard-res K55xx chassis. Since the medium-res versions of the 19" (K4915) and the 25" (K5515) use the exact same horizontal width coild (same part number), then I would assume that the standard-res versions of the 19" (K4901) and 25" (K5501) use the same width coil as well....
 
This is mounted vertically and the image refuses to stretch across the screen horizontally (black bars on the left and right sides of the screen). I know it needs a cap kit, but I am wondering if this is something worse. Will a horizontal width coil from a regular 4900 chassis work as a replacement?

If the left and right width is messed up on a vertically-mounted monitor, then your problem is with the vertical deflection, not the horizontal deflection.

The back right corner of the chassis ( the vertical section) has a bunch of big white ceramic resistors. It is very common to have lots of cold solder joints in that section, as well as other parts of the chassis....
 
Thanks Mod, this was driving my nuts, I couldn't remember! Hey, I found another quarter in it for a total of $1.50!

Sounds like I'll order a cap kit and take it from there.
 
Sure sounds like vert deflection failure. This chassis 55xx (really just a 25" version of a 4900) is well known for bad solder joints all over the main board. Sometimes the two vertical output transistors fail.
 
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