Question about Emerson EWC0903 9 in. TV/VCR Combo

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Emerson ewc0903 tv works fine on ac but when tring to use on dc set shutsoff after about 3 to 5 seconds no sams on this model need power supply print

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Re: emerson ewc0903

Hi sorry only way for manual is through "sears" any way it looks like your battaries are dead! put new ones and see if it works good luck

Posted on Feb 26, 2006

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I have an Emerson TV/VCR model EWC1902. Unit will not turn on at all. I am an electronic tech. The fuse in the power-in circuit is good. I have a-c power to the unit. I do not have schematics. What is the...


Hello,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.

Sep 29, 2011 | Emerson EWC1902 19 in. TV/VCR Combo

1 Answer

Turn on my Emerson tv/vcr model # VT 1921.. it has no sound, no picture just a buzzing noise.. what is the problem??


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Aug 15, 2011 | Emerson Combination Televisions

1 Answer

DC powered fine. AC Power intermittent


in order to find the connection, you will have to open up the tv carefully and follow the power supply in and probably a thin piece of metal will be broken and need to be resoldered back on. The broken piece will most likely be on or around the board.

Be careful when working on this because you could receive an electrical shock especially if you don't know what you are doing.

I would suggest letting the tv discharge overnight by unplugging it.

Please let me know if you need any further help or have any questions.

Thank you and good luck

Apr 14, 2008 | Emerson EWC0903 9 in. TV/VCR Combo

4 Answers

What do I do when my Emerson TV keeps turning off by itself?


I had the same problem with mine turning off after 3-5 seconds. After much research I found a suggestion that on some combo units the vcr part could have a power supply cutout if it is not working correctly. I tried to insert a tape and found that the tape mechanism would not accept a tape. I used a little bit of force and managed to insert a tape. I then played the tape forwards and backwards and the power stayed on! I ejected the tape and found the TV then worked just fine. The power has now been on for over one hour. I hope this give you another avenue to try and fix your problem.

Nov 30, 2007 | Combination Televisions

2 Answers

POWER SUPPLY


I found one at Neximaging.com the model # is ch-1205 it is 12 volts 5 amps

Nov 26, 2007 | Wanlida Group LTD-1510 15 in. TV/DVD Combo

1 Answer

Tv/vcr combo/ac-dc/


Mi amigo si la television se apaga al querer reproducir un casete es indicio que el problema esta en la casetera,quizas le falte la banda del motor de reproduccion

Oct 11, 2007 | Emerson EWC1303 13 in. TV/VCR Combo

1 Answer

Unit blows fuses


its a short in the power supply but ist realy care?, whats the price of this unit?...good luck

Aug 11, 2006 | Emerson EWC0903 9 in. TV/VCR Combo

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