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Re: Picture in narrow line on 35" Tube set
The problem you are describing is called loss of verticle deflection. You will find this will require diagnosis and there is no simple answer to this repair. Most likely there will be either bad electrolytic caps or bad vert. output IC in the vert. circuit.
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Without seeing the lines I can't be sure what your set has wrong, but here are a some possibilities:
If the lines are lines are confined to the top inch or two of the screen and the picture looks otherwise normal, the trouble is bad capacitors in the vertical output circuit. Fixable by replacing the bad parts.
If diagonal lines are across the entire face of the picture tube and the picture looks washed out, the trouble is often a bad capacitor on the 200-volt line to the picture tube. This may be on the main circuit board near the horizontal output transformer, or on the small circuit board plugged onto the end of the picture tube. Again, replacing the bad capacitor can fix this.
If your TV is actually an RCA, someone may have bumped a rear-panel adjustment. On the back of the TV near the bottom right are two small knobs. RCA left these adjustments exposed inside of putting them inside the set like other manufacturers. These sometimes get bumped if someone was behind the set cleaning, or if a pet got back there and hit them with a tail. The top knob adjusts focus, and the bottom knob adjusts something called G2 or screen voltage. If this gets turned up too high it can cause the faded picture and diagonal white lines. Turn the adjustment down until a black screen looks black instead of gray.
A bad picture tube or horizontal output transformer can also cause lines through the picture. If this is the case with your set, it's time for a new TV. The transformer is relatively inexpensive but labor costs aren't, and the repair bill may exceed $200. If the tube is bad, there's no point even considering repair. The tube cost alone exceeds the cost of new TV.
Hopefully your lines are easy and cheap to fix. Good luck, and thanks for using Fixya!
Since there is a blue screen atleast, I don't think that the picture tube is gone. The fault may be either to its chroma IC or video output section. In both sections fault cases, this type of horizontal lines [parellel to each other at about 1 inch or so apart the entire screen] will be seen. Just check the voltages at the three cathode, ie, red, blue and green of the piclture tube. This can be measured at the picrture tube neck card. If you have through knoledge in electronics, have patience and enough tools to do the work, inform me through Fixya. Without these, you can't work on a tv, especially in Philips.
Otherwise, get it checked by any expereinced service technician. OK.
You most likely have a bad picture tube. Green gun is shorted. Usually a set this size is not economically feasible to put a new tube in. You may also have a green drive problem on the CRT board. Have a shop check it out for you before junking it. Thanks for using fixya.
the vertical drive ic that drives the yoke for vertical sweep has blown.
sometimes it is solder problems like sharp and toshiba had.
the part is 10$ the pc board will label it ,the yoke is the coil setup on the picture tube.if you follow the wiring half goes to the horizontal drive,and the others to the vertical section.the chip drives the coil directly.there are VERY high voltages in there ,even turned off. the pix tube cap on top is 30000v. like a stun gun.the horizontal drive 2000 volts and the main power supply 165 volts dc high current.you need a special setup to discharge the picture tube.
Three guns Red Blue and Green in the picture tube of an old CRT set. If one of the guns goes out it effects that color. Sounds like one of the guns inside of the tube is going out, To costly to replace for such an old antilog set that will have to have a convertor box next month anyway.
If the horizontal lines going through the picture are fine white lines, then I would suspect the picture tube as having a heater to cathode short or some other problem. Since some sets have had a 3 year warranty on the picture tube, you may be lucky unless the labor to replace the tube is more than the set is worth. Sanyo is usually not a good name in consumer electronics anymore, so if you're looking for a replacement I would look elsewhere.
It could be a bad solder connection on either the crt drive board that attaches to the neck of the picture tube, the video processing circuits on the main printed circuit board or the picture tube itself. If you can lightly bang the sides or top of the set to get the symptom to come/go, then it is most likely a bad connectiion. If, when the screen goes green, you see fine white lines diagnonally across the screen about a half inch apart, then it is likely the picture tube.