Rare find! A Magnavox Brittany tv!

[timmy]

Originally Posted by Yamamaya42

Adjusting the linearity may reduce it a bit, i have not tried to set it yet, waiting for the new width coil.

I don’t think linearity will make a difference with that drive line. And that set don’t have a coil with the screw rod in the middle. If not there’s got to be a way to get that horizontal frequency down. Maybe go back and look at what was done in the horizontal section besides the flyback because that line kind of puts a damper on all the work that was done already. Had the same problem with 2 sets 1 color and 1 b&w was the same thing just a slight counterclockwise and it was gone.

[Yamamaya42]

I doubt that the frequency is off by any degree, or else I would not have good horizontal lock, which is very solid, I can switch it off the channel and back and not loose lock, which is in the 2nd step of the horizontal circuit alignment, it does look like a drive issue, but I have no way to adjust it other than the linearity coil.

[timmy]

Originally Posted by Yamamaya42

I doubt that the frequency is off by any degree, or else I would not have good horizontal lock, which is very solid, I can switch it off the channel and back and not loose lock, which is in the 2nd step of the horizontal circuit alignment, it does look like a drive issue, but I have no way to adjust it other than the linearity coil.

Both my sets had very strong and stable horizontal as well but the frequency was off very little.

[Yamamaya42]

The instructions are vague and confusing for the horizontal geometry.
C:
Width and linearity.
Adjust the width control (located in the upper corner of HV box) so picture fills screen bezel.
Then adjust horizontal drive and linearity for proper width and linearity of picture.

It mentions "horizontal drive" but as mentioned before, there is no such adjustment, so before I mess with the horizontal speed adjustment or horizontal lock again, I'm going to see what happens when the Width and linearity core is tuned, the linearity, being on the cathode of the damper tied to 3 caps.

[timmy]

Originally Posted by Yamamaya42

The instructions are vague and confusing for the horizontal geometry.
C:
Width and linearity.
Adjust the width control (located in the upper corner of HV box) so picture fills screen bezel.
Then adjust horizontal drive and linearity for proper width and linearity of picture.

It mentions "horizontal drive" but as mentioned before, there is no such adjustment, so before I mess with the horizontal speed adjustment or horizontal lock again, I'm going to see what happens when the Width and linearity core is tuned, the linearity, being on the cathode of the damper tied to 3 caps.

And the schematic actually says adjust horizontal drive but no such adjusts there.

[Yamamaya42]

http://suzaku.live-evil.org/maggy-solved.jpg

So far, I have not touched L111 yet.

[timmy]

Originally Posted by Yamamaya42

http://suzaku.live-evil.org/maggy-solved.jpg

So far, I have not touched L111 yet.

Is that L110 says horizontal speed that would be it

[Yamamaya42]

confirmed, adjusting the width and linearity got rid of the line in the middle.

http://suzaku.live-evil.org/0724251852c.jpg
http://suzaku.live-evil.org/0724251853a.jpg

Still stretched a bit on the left.

not adjusted vert yet.

[timmy]

That left side wouldn’t be horizontal? Well either way after adjusting everything and the line comes back then take a look at L110

[Yamamaya42]

I was able to minimize the stretch on left side by adjusting the angle of the focus coil, I will adjust again once the front bezel is on, as it covers the far corners, I may not be able to get rid of all of it, but minimize it via L111 adjusting and focus coil tilt.

[Yamamaya42]

Still cant fully get rid of the stretch on the left side of the screen, was able to make it smaller but not get rid of it yet.

http://suzaku.live-evil.org/h-lin.jpg
Gonna try to replace C180 (270pf) see what that does, may do nothing, more likely the 56pf cap in the yoke, but don't wanna pull it all apart again at this point.

[timmy]

When I had the white line on my set I do recall I had a slight stretch but after tweaking the horizontal drive just a bit to get rid of the line the stretch was gone so maybe that’s what you have going on. Try disconnecting the width coil.

[bandersen]

Left side of the screen is controlled by the damper circuit as recovered energy from the collapsing magnetic field fades away.
Right side is controlled by the horizontal output tube.
The cap in the yoke suppresses ringing.
Pretty sure C180 filters noise out of the DC bias horizontal centering control.

[Yamamaya42]

More bad luck!

Was trying to adjust the Width and lin a bit more today and suddenly lost brightness and vertical height, it would sometimes come back, but quickly fade, HV was fine, but something was clearly wrong, did not take long to find that one of the resistors that I had left alone ( candohm ) had failed, R215, (260 ohms 11w), so, ordered now is a RH025261R0FE02 261 ohm 25w, the closest I can find. will be here thurs, since I missed the window for them to ship it today.

[Yamamaya42]

Yop, Mouser just shipped it about an hour ago.

Tiny little thing for a 25w resistor, looks like this.
https://i.ebayimg.com/images/g/pWYAA...lE/s-l960.webp
Much smaller than the failed 11w one that I opened to look inside.
It had not burned open or anything, but failed due to corrosion where the metal clamps to the nichrome resistor wire inside, I must have disturbed it too much bumping the HV case where it's mounted,when trying to adjust the horizontal linearity that is right near it.