Originally Posted by fred33
2170D-1 and 2170D-2 are universal raster or "picture frame" settings? (except where noted in the manual) 2170D-2 -- #3 -SLIN adjust stretch of picture horizontally ? . . . MID1 #0 thru 5 is universal, and # 8 through 12 is picture size on the raster and can be adjusted to viewer preference?
One day I tried to figure all this out, and I took notes.
It looks like 2170D-2 #0-5 are universal, indeed. #6 is a luminance-color delay setting, and #7 is a "Y-S" delay setting, whatever that is. #8-11 seem very similar to four items in 0-5, above, but the scope of the settings can be adjusted per several frame types (VGA, "Others," etc.).
SLIN isn't a general stretch adjustment but varies the s-curve compensation for the dimension it affects (I forget; vertical?)
MID3 is mainly 1080i and 720p adjustments?
MID2 is mainly 480i adjustments?
That seems to jive with my notes.
Has anyone posted information on MID3 #'s 4 through 11?
Yes. They seem to be esoteric pulse and timing parameters, with abbreviations for phase-locked-loop, width (pulse), start, stop, field reverse, etc. I doubt that tinkering with these are to any benefit, as they are likely adjusted with instruments connected.
Has anyone posted information on 2170D-3 #'s 1 and 2 ?
2170D-3 #0-6 control the blanking "shutters" that prevent the electron guns from spraying the sides of the CRT where reflected energy could cause glow and contrast reduction. You have to turn these off to confidently center a raster and picture or even adjust overscan.
#0-HBLK and #3-VBLK are the "master switches" for this function, horizintal and vertical, respectively. The other four parameters are the widths of the blanking shutters (blanked areas). Higher is wider.
A normal procedure for adjustment would be: Turn off the blanking entirely with the switches. Do your centering and overscan adjustments. Then turn the blanking back on, and adjust the four shutters until they just creep into the visible raster; then back off the settings a bit until they disappear off the edge of the screen. Now the electron beams are cut off beyond the edge of the phosphor area.
When I follow the manual to center the raster I get a mirror effect on the right side of the raster. Is this normal?
Are you being careful to distimguish between positioning the raster
and positioning the picture
on the raster? In an orthodox adjustment process from the service manual, 2170D-2 #0-HCNT centers the raster (scanned area) on the CRT. Then #1-HPOS centers the picture (video frame) on the raster. You can push the video frame so far to the right or left that it appears to "wrap" back on itself. Is this what you mean?
Note that some of the size adjustments in MID1 leave one edge stationary while extending the other edge, unlike the actions in 2170D-1 and -2. This can be confusing if you don't see it at first.
I hope this is some help. I concentrated on this one afternoon in the winter and got it right for my set, then have left it alone for months. So these are not fresh memories, and my notes are somewhat cryptic.