Sony trinitron 32 in. pip no video, (raster, with audio)
I was given a sony trinitron 32in pip tv, when it's powered up, audio is working, but the video only displays a monochromatic screen with regularly spaced lines (I think, this is called raster?) Is this a shorted picture tube? Or, are these sets prone to cold solder joints?
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Re: sony trinitron 32 in. pip no video, (raster, with...
What you have described there is a classic example of the jungle IC failure. Ic301 Sony p/n 8-752-101-04. A pic with no color, and lines or grainy texture in the picture. Not a project you want to tackle if you don't have the proper soldering equipment or skills. And not a costly one at a good repair shop.. Only real hurdle is getting that heavy monster into the shop.
To answer your question, yes what you described there is raster. Even the salt & pepper looking screen with no real decernable image is described as raster. In fact any image generated on the CRT is raster.
And yes, these sets are prone to solder joint problems, usually ring cracking in circuits that generate the most heat.
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Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206. To get more details, http://electronicshelponline.blogspot.com/ Pull up older posts. Blinking codes to many many models Trinitrons are given.
Six blinks of standby light in Sony TVs denotes the absence of horizontal oscillation.
No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206. In most cases the Ic is foud defective. anyway check its soldering points for any loose contact, or bad solerings. Check the line drive transformer, a very little transformer soldered directly to the main printed circuit board, very close to the horizontal output transistor. Check its primary winidngs for open. If it gets open no horizontal drive signal will be present at the base of the horizontal output transitor, that also may the cause of horizontal stop.