Nice to know somebody there back then had a sense of humor...! I always love it when somebody has a chance to slip something in mostly unnoticed...
I'm a computer person by trade and an electronics gadget nut at home. I recently acquired a KP-46XBR35 off craigslist for $50 and have been working on getting it back to its original glory. Here is what I have done so far:
-Inspected the innards as much as possible without pulling boards apart. No coolant leakage whatsoever, coolant does not appear contaminated, no capacitors are bulging or leaking and no components appear overheated or burnt. Very impressive for a 1995 set.
-Cleaned the 3 lenses using mixture of water, rubbing alcohol and a drop of dish soap (formula from another online source can't remember where). They had a thin film of brown dust on them
-Cleaned the giant mirror inside the housing using Weiman spray can glass cleaner (had a slight but noticable hazy white film over it, verified the mirror was real glass and not plastic before cleaning)
These two steps yielded a massive improvement in clarity and color depth, they now "pop" instead of being muted and dull. Colour temperature improved from being extremely yellow.
-Upped the BDRV in the service menu to correct whites from being overly yellow. Read Mr.Bob's comment about needing to either goose blue drive or defocus blue to acheive this.
I am now slowly trying to correct geometry and convergence. With the silly on menu crosshair perfectly set there were issues with blue bleed and misconvergence especially on left side. Upper left and right corners were blurry.
-Refocused the 3 guns using the focus pots on the flyback
Now trying to wade through the sea of about 50 trimpots to fix geometry and convergence. I've reduced overscan to about 3% according to AVIA.
Service manual lists what each pot does but seems incomplete, and the pots are labelled in tiny microprint and do not follow the order in the service manual. I've resorted to iterating through the rows of pots in sequence, improving picture with each pass of adjustments. I know which are horizontal and vertical for each color as they are in rows together.
I've set up green and am finishing aligning red to it, with blue next. Red I am having a little trouble, it is mostly aligned saving one column on the middle left of the screen (AVIA 100IRE crosshatch grid), and the corners of the red grid are slightly folded/warped no matter what I do. I am open to suggestions to fix. I haven't touched the wingnuts/lens focus yet and not sure if I should.
I am aligning by eyeballing the screen and learning as I go, which is probably making some people wince, but it my preferred way of learning and with only $50 out of pocket I have nothing to lose as long as I am careful and don't set crazy values that will fry the set. Prior to this I had never touched an RPTV.
Also: Mad props to Mr.Bob and the others who have posted their experiences, pictures and guides for me to muddle through!
Great work so far. But be careful -
There are certain pots you MUST stay away from in there. They even cause me grief, I won't touch them either, unless absolutely necessary. They are in that final grouping on the right end of the bank, when you're facing the set.
Always mark your starting points. This includes every pot you change the position of in there. It takes a few minutes, but can save you incredible amounts of grief later.
You need the "Geometry and Convergence" grids from AVIA, and you need to do grids at 50IRE, not 100. At 100 the light's too strong - it makes your focus bloom and tows your convergence off, plus burning those grids into your phosphors.
I am available by phone, so don't paint yourself into a corner even I can't get you out of without being there.
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