Quote:
Originally Posted by Console User
The TV was in the TV Shop in January. They repaired the grounds on the chassis, etc.
He ran short wires where needed to repair grounds. It must just be time to retire this one.
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If you get me the exact chassis number
including suffix, I'll see if my buddy has a "preprogrammed" eeprom for it.
Now, in an analog TV, there's no such thing as a preprogrammed eeprom as every part has a slightly different tolerance including your CRT (even if they didn't age). The pre-programmed eeproms were loaded with values that were an average taken from a dozen properly running chassis. Of course it won't be optimized for your chassis, but they'll get you a picture for sure - probably a decent one. You'll have to touch up the gray scale and vert height, center, horiz width and centering etc. to improve it.
I had to do several tuner alignments on TVs that had a previously installed pre-programmed eeprom in them done at other shops. Even a digital varactor tuned circuit has knifed coils and even varactor diodes have different curves.
If he has the eeprom, he'll give it to me and I'll mail it to you. It's an 8 pin chip that isn't difficult to change. You can always put a socket in before putting in the new chip.
John