philips tv with tracking lines 21pt9457 / 55 chassis sk4 ol .ca
As for the transistors it would be good to consult the diagram to see if they are adequate, regarding the voltage of 180 vdc check if the fuse resistance near the fly back is open the safest is that if it is so it does not reach the socket and the Color amplifier transistors, is a low value resistor such as 4.7 Ω at half watt.
Strange friend is that the 180 vdc are present on the card I turn on the teve and when I take the measurements there is no kb kr kg the 180 vdc does not arrive
Suggestions. 1.- arm a vpp probe to locate if you have a signal at the exit of the jungle. There is another probe to measure when the signal is in the cathodes of the kinescope. 2.- in manuals and contributions, you are looking for a folder: color TV ajsutes folder.- you download the folder, the content you make a cd or a usb and you put it on the tv. This will allow you to check each color separately. It has a grid, dots and color patterns. If you like, I send you a diagram of the two probes. regards. Felipe ascencio
excuse me, I mean that by not having the full 180v you have to change that filter 250v22mf or 250v47mf
