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Old 06-08-2007, 12:21 PM
mattdavala's Avatar
mattdavala mattdavala is offline
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Join Date: Jun 2007
Location: Hillsboro, Oregon
Posts: 129
Horizontal off frequency RCA TV

Hello!

First time posting, but I have been reading for quite awhile. I have a 21 inch RCA TV that I aquired from Phil Nelson. 21T227. The Horizontal oscillator is "locked in" at a wrong frequency. Multiple images. Phil Nelson had the same issue and scanned the horizontal part of the schematic. If you want to take a peek its at:

http://www.antiqueradio.org/art/21t227.jpg

There are multiple images on screen, but sync is locked in. I am RE- replacing C95 C96 C97 and C98. I am using orange drops for all except C96 which is a dipped silver mica.Will those capacitors affect the horizontal frequency? What about C93?

There is a resistor R105 is 10K less that its supposed to be, schematic says 5% tolerance. How does that resistor affect the horizontal section?

Here is everything Phil has done to the TV before I aquired it. http://www.antiqueradio.org/rca15.htm

If replacing those caps doesn't bring the Horizontal osc into correct freqency, I'll will be listing this great TV for sale. :-(
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