C430 was s/c (burnt) in LOP stage and the resistor R420 was also burnt beyond recognition. It looks like it's the feed for the line drive voltage. Can you possibly tell me the value of the resistor as I do not have a manual. Thanks in anticipation...Steve
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Monitor horizontal lines problems usually caused by a defective vertical output/driver ic. A missing supply voltage to the vertical output ic may caused similar faults which is one horizontal line across the display. Dry joints and missing vertical output pulse from vertical oscillator ic also could contribute the same symptom. If you discovered that the protection resistor (usually from 1 to 4.7 ohm) open circuit or burnt, then replacing it won't solve the problem. The resistor burnt or open circuit was due to a short in the vertical output ic. Thus you have to replace the vertical output ic and the burnt resistor together before you switch on the monitor.
A good tech could probably fix that, did it burn a hole or otherwise carbonize the phenolic PC board material? If so replace the board.
You can only get that board directly from Sansui or one of their distributors. If your set is out of production (more than a couple of years old) there is a good chance that the board is no longer available likely get that board from Sansui, there will be no generic replacement for that. There is a safety factor involved here.
If you can get the board then replace it and see what happens. Hopefully it will happily give your more years of service.
The red line on ICS is quite normal it does not mean the part has failed.
To be honest in most cases if a tv has been hit by strike it is a right off & scapped.
What I suggest is to remove the main pcb & power supply pcb if its seperate & inspect the print side of pcb for signs of arcing tracking or burnt track. Repair any damaged track by cleaning off the coating to get at clean copper then solder wire accros to bridge the damage.
Check the power supply resistors diodes transistors look carefully for any burnt components or components which are physicaly damaged.
Check the line output transistor this will be near the large transformer with a thick red ht lead going up to the crt.
Check all the components you can in the line stage look at all the ICS to ensure none of them have holes in them or have blown apart.
Hopefully you find some or one if your very lucky that is damaged replace it & try your tv.