Good day dear friends.
I have this problem with my tv.
When i turn on the tv the led indicator starts blinking and the tv comes on for 1-2 seconds then the lamps turn off and screen goes black. When i look closely i can see the picture meaning the tv works fine but the lamps are off.
Now the power supply outputs the correct voltages to the main pcb. the problem i think is located at the section that powers the lamps.
Here is the power supply i am talking about:
http://www.ebay.com/itm/Power-Board...r-SAMSUNG-LE22B450C4-LA22B360C5-/260879477763
This tv uses the TM-0917 inverter. I have removed this and i tested the coils with a multimeter.
Primary shows 0 ohms (shorted) (multimeter beeps when in beeper mood) shows 0 ohms at all scales. The secondary coils both give me a 1 Kohm if i remember correctly.
(measurements taken with the inverter removed from the pcb)
I have no idea if the values i measure are the values that the TM-0917 sould have but the 0 Ohms on the primary makes me think that it is shorted.
I measured voltage on primary and for the time period that the lamps come on i get 200V
If the primary was indeed shorted then i sould be getting no voltage correct ?
I think that the problem is either the TM-0917 or a little chip that the primary coil is connected to.
I have removed the TM-0917 and measured voltage across the primary coil terminals on the pcb.
I get no voltage at all. Could it be because the chip is sensing the absence of the inverter ?
I am a little confused here.
Any help apreciated !!!
I have this problem with my tv.
When i turn on the tv the led indicator starts blinking and the tv comes on for 1-2 seconds then the lamps turn off and screen goes black. When i look closely i can see the picture meaning the tv works fine but the lamps are off.
Now the power supply outputs the correct voltages to the main pcb. the problem i think is located at the section that powers the lamps.
Here is the power supply i am talking about:
http://www.ebay.com/itm/Power-Board...r-SAMSUNG-LE22B450C4-LA22B360C5-/260879477763
This tv uses the TM-0917 inverter. I have removed this and i tested the coils with a multimeter.
Primary shows 0 ohms (shorted) (multimeter beeps when in beeper mood) shows 0 ohms at all scales. The secondary coils both give me a 1 Kohm if i remember correctly.
(measurements taken with the inverter removed from the pcb)
I have no idea if the values i measure are the values that the TM-0917 sould have but the 0 Ohms on the primary makes me think that it is shorted.
I measured voltage on primary and for the time period that the lamps come on i get 200V
If the primary was indeed shorted then i sould be getting no voltage correct ?
I think that the problem is either the TM-0917 or a little chip that the primary coil is connected to.
I have removed the TM-0917 and measured voltage across the primary coil terminals on the pcb.
I get no voltage at all. Could it be because the chip is sensing the absence of the inverter ?
I am a little confused here.
Any help apreciated !!!
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