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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

Posted by steve hamsley on

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Anonymous

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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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TV Power Supply is not working - how do I diagnose what component I need to replace?

Power supply might be working fine - intelligent switch mode psu will probably shut down if the current demand is too high and so the fault could be elsewhere.
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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
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Samsung 1080 picture glitching on model # HL61A750a1fx2c Versionre01

If it's all colors (Red, Blue, Green) doing the same thing at the same time, there are (unfortunately) multiple possibilities:

1) the AC to DC power supplies
2) the LED Driver Board
3) DLP driver, or DLP itself

The most likely problem is the DC-DC power supplies, which are known to have capacitors that go bad after several years of operation.

Due to this, there are many sources for either re-capacitor kits (DIY), or rebuilt power supplies with upgraded capacitors.

WARNING - Dangerous, and even lethal voltages are present inside your TV set. Do not attempt this unless you are trained in these kinds of repairs. Leave the TV unplugged for several hours (or preferably a full day) before attempting such.

DIAGNOSIS for bad capacitors: If you inspect the large capacitors on the power supply boards, and they are not totally FLAT across the top surface (if bulged at all), then you need a new power supply or new cap's. Likewise, if there is any leakage from the capacitors (usually a light-yellowish crusty appearing substance), they are BAD.

Sub-power supply:
BP96-01726B ASSY PCB P-SMPS Aquamarin,LED DLP TV,DC2

Main power supply:
BP44-01001A SMPS-DLP TV PN082DPS-VF(A),AC/DC,90V-132

A quick Google search for these part number (BP96-01726B & BP44-01001A) will reveal many sources, and pictures to verify it's what your set has.

1_12_2013_7_27_32_pm.jpg1_12_2013_7_27_48_pm.jpg
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Need a ac adaptor for a Protron PLTV-32. MODEL LU32A1A3. INPUT 100-240V 50-60Hz 3.0A MAX.Output +24V-6A +12V-3A

I found one through Powerpayless.com at http://www.powerpayless.com/ac-dc-power-adapter-for-protron-pltv-32-pltv32-lcd-tv.html. It works great!
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Just wondering what the power supply output JBL Media 3 Speakers

I have a pair of Media 3 JBL computer speakers. I am using a generic 12V DC adapter rated at 1000mA with a positive tip polarity, and it works fine.
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Won't work on ac

1. Make sure the AC power source is ok.
2. Make sure the AC power cord is good with no damage.
3. Look to see if there is a reset button on the rear of the set. If not, then look for a blown AC fuse inside the set.

Since the set works fine on +12VDC, the majority of the TV set is ok. You have a problem in the AC power supply. It could be a blown fuse, bad rectifier / regulator, bad step-down transformer.

The TV typically runs from +12VDC. The AC supply steps-down the 120VAC and rectifies it into +12VDC to power the TV. At some point in the TV, there is junction point where the +12VDC from the sets internal AC supply meets the external +12VDC power source. Usually they are electrically isolated from each other with a switch or with diodes.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim
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Toshiba 9" TV/VCR W/CAR AC/DC - No power when on battery

I would check on the inside for a disconnected wire or loose connection at the Dc imput if it still works on ac. You can most likely get a service manual at http://www.servicemanuals.net/ if the wires are intact on the DC imput and the jack itself fits secure to the adapter. Hope this helps
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Unit blows fuses

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