Question about Samsung Televison & Video
I check the voltage regulator ok and the unit was wet once last week and could not be on and no standby power thanks ben.
SOURCE: volvo V70 electrical problem
had the same problem with an s80 this week- no warning lights nothing. was the regulator. when you have it fixed cancel all the trouble codes as when voltage is low everything registrs low signal input and makes the car go into get me home mode.
Posted on Jun 30, 2008
SOURCE: Grundig tv Davio T51-3101 TOP.
You either have a Faulty Horizontal Oscillator IC? OR something, on that 1.3 V Output, is dragging that output down and on that output, something drawing too much current, and causing the IC, to not be able to drive to it's full potential, usually 5 V DC in a logic circuit, but if CMOS, then even 12 V DC.
All one can really do, is find the "Cause" of the low output, remove the "Fault" and/or change the IC, too (It's most likely damaged anyway? So I usually do)
You need to get the parameters of the IC & Semi's that you are working with and check the output against what it should be.
Also, you did not indicate if you were using a service manual. If not, then I implore you to obtain one, as without it, one really cannot work effectively.
As I always used to say to my students: Are Your Voltage Correct? Specifically, starting with the PSU, as if this isn't 100%, nothing else can be. Anyway check all voltages around your IC's & Semi's. Also remember the technique of "Cut & Test" too, isolating parts of the suspected circuits, by cutting a trace, or chopping a Leg or Pin, on a Semi or IC, can be useful in tracing where the fault is going. One other thing is Current Measurement, cutting into a circuit, and inserting the Ma meter, into the circuit, will also soon show you where the problem is, reduced current usually indicates a "Short", a high current usually show a disconnection, or "Open" circuit.
Hope this helps.
Posted on Aug 27, 2010
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This is an indication that you have a problem on the power
supply section or on the load because of the following reasons :
1. Over Voltage - the regulator
might be cycling on over voltage due to lack of load.
2. Over Current Protection - excessive
load or faulty power supply cycling will
trigger the over current
3. Leaky Capacitor - a dried up
main filter capacitor or other filter capacitor in the power supply
that is producing an out-of-regulation condition. A bad
filter capacitor on the output of a series regulator may result in excessive/drop of voltage once sense by the processor it will not power up the unit unless isolated.
4. A problem with the
microcontroller, relay or its driver, or standby power supply.
This is not DIY and quite technical so I've advice you to
look for a qualified technician or send it to repair shop to isolate the
But first check if your unit is under warranty then avail it
because the manufacturer of your unit will fix it for free or with a little charge
Thanks for using fixya.
Please rate my help.
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