mikemaiertv
Enthusiast
Feb 16, 2005, 12:09 AM
Post #4 of 7
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Re: [shadetree] RCA TV runs but without picture
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Well if you mean you ripped the high voltage lead out of the Flyback, your right that probley was not the best move, see if it will relock back in or you will have to replace the flyback ( High voltage transformer ) And I agree splitters are a go no-go type thing, but the other most common " simple fix" I covered in how to replace a splitter, will just copy and past the B+ repair here and see how ya do
,,This will be my general “caned answer” for the CTC 169 or in these cases the PTK169 chassis, first of all the “light box” can be removed from the set making it much easer to work on, first remove the back and on top of the box there is a plug where the front panel attaches to, remove that plug unwrapping it from all the holders on top there may also be a place where the speakers plug in up there but in most cases they snake down and plug in to a board right in the audio output board in the back. Then remove all the screws on the bottom back that hold the chassis in, slowly pull the chassis out making sure the wires don’t snag up and break something.
Once the box is out the set gets real easy to work on, you can use the remote control to turn the set on because the IR sender is located right in front of the green CRT.
Then as general rule we change three capacitors in the power supply no matter way the set failed. These caps tend to dry out driving the B+ voltage high, they are located in front of the plug on the right side of the main board and two are located just left of Ic U4401 cap C4104 or as shown on the board as C104 this will be a 15uf at 50 volts change it to a 22uf , 50 volts and then C102 a 2.2 uf at 100 volts finally the big one to the right of the first two C108 a 39uf at 100 we change this to a 100uf ,100volts. In Every 169 we worked on The B+ voltage is always been high because of these caps wearing out, just by changing these three B+ usually returns to normal
Mike Owens Owner Competition TV Spokane WA.
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