Emerson LCD TV/DVD combo DEAD

On Thu, 7 May 2009 21:18:12 -0700 (PDT), snipped-for-privacy@yahoo.com put finger to keyboard and composed:

Try this Funai service manual:

This is the owner's manual:

- Franc Zabkar

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Please remove one \'i\' from my address when replying by email.

Have you tried ESR checking all the electrolytics on the primary side ? Is this a 'typical' LCD power supply that has effectively three SMPSs on the same board ? ( PFC supply, standby supply and run supply) If so, is the standby supply running ? I repair a lot of LCD switchers, and sometimes, they can be very difficult to get going again. One little trick on an 'unknown', is to cast around on the 'net to see if there is a "PSU repair kit" available for the model. If there is, it is often worth investing in one, and fitting ALL of the parts which come with it, irrespective of whether they look / read / don't seem to be faulty. Almost always, this will result in a long term fix. By doing this, you eliminate the uncertainty of interpreting 'ambiguous' markings on tiny surface mount components.

Most modern switchers are quite well behaved repair wise, when you fit a genuine repair kit. After using such a kit, you can file away the parts list that comes with it, and next time you get one in for repair, you can source the individual parts cheaper than buying a kit.

Arfa

disconnect the secondaries on the psu transformer , see if the psu comes to life.

chances are you have an open resistor somewhere near the MOSFET.

pdf

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THANK YOU everyone for the terrific and helpful information you provided.... and Franc Zabkar, thanks for the link for the service manual, most helpful as you can imagine. I will post another reply when I get this unit repaired or if I am still having problems and might need more good advice. thanks again. electricitym

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THANK YOU everyone for the terrific and helpful information and suggestions that you provided.... and Franc Zabkar, thanks for the link for the service manual, most helpful as you can imagine. I will post another reply when I get this unit repaired or if I am still having problems and might need more good advice. thanks again. electricitym

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Trying to fix a 32" RCA TV DVD Combo. model # RLCDV3282A-B.

When I plug in the TV does not turn ON. However a dim power light (RED led) comes On.

No clicking sound. No buzzing. Nothing. Plain and simply dead except for th e dim POWER light.

I am unable to locate specifically the bad component.

Checked most capacitors. No visible signs of damage or bulge.

Across the main 450v 68uF capacitor I get 90v DC. Mains has steady 110V AC.

Output connectors of the main power supply board gives 24, 12 and 5 v DC. N o problems.

However, the DVD board is not getting its 5 volt DC which actually comes fr om the main-board that has the graphic ic and all other video ouput connect ors like HDMI etc.

I am unable to trace where/why the 5 volts from this board is NOT coming to the connector. There is another set of long connector on this main board w hich receives power from the power supply and that shows the relevant 12v a nd 5 v Dc at that point.

So in short, the main-graphic board that also powers the dvd is not giving

5v dc output to the DVD player - which i believe also powers the switches - and thus the TV is perhaps frozen in standby mode ( I am not sure of that) No remote so I cannot take it out of the standby mode - also ALL the switc hes are non responsive.

Any help will be appreciated.