Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

[tsm174]

Hi all,

I found this ancient (2004) Daewoo DTS-42 plasma TV. When I turn the TV on, the status light turns green, the screen is on but black for a few seconds, then it kicks into standby mode and the light turns red.

Haven't been able to find much info online so I thought I'd try here before I junk it. This TV might be a re-badged NEC and also there is a sticker inside that says Pioneer NP42B3MF01.

I'm pretty much just looking over the boards for loose solder joints but there is a lot to go over. Any other ideas or pointers?

[newtothis]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Pictures?

[ammarben]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

test the psu alone

[ReeceyBurger123]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

I agree with the guy above unplug the sustain boards and check the psu, this will help rule out a short on the sustain board dragging down the psu.

[tsm174]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Pictures?

What pictures would be helpful? I can take some tonight.

[tsm174]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

I agree with the guy above unplug the sustain boards and check the psu, this will help rule out a short on the sustain board dragging down the psu.

Sounds like a plan. Now I need to identify the sustain boards and figure out how to check the psu. Would checking the psu (power supply unit?) entail checking voltages with the tv plugged in while the sustain boards are unplugged?

[ReeceyBurger123]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Sounds like a plan. Now I need to identify the sustain boards and figure out how to check the psu. Would checking the psu (power supply unit?) entail checking voltages with the tv plugged in while the sustain boards are unplugged?

The sustain boards are the boards that have ribbon cables going to the screen could you take photos of all the boards please.

[tsm174]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

These boards are huge and some overlap, so here's what I have to start...

[speciess]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Any solution here?i have the same problem with same Tv,psu checked and good,stay on when the sustain board disconnected...no visual issues on sustain board and all the checkable components checked and good.any ideea?thank you in advance!

[ReeceyBurger123]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Checked the Ipm module ? Also have you disconnected one or the other sus board and tested ?

[speciess]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Checked the Ipm module ? Also have you disconnected one or the other sus board and tested ?

im on that but they seems the solder used its Sn&Ag so im affraid to desolder that because i can harn some components from igbt.the buffer boards isnt tested because the tv is not in my home...i will do that tommorow

[speciess]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

im on that but they seems the solder used its Sn&Ag so im affraid to desolder that because i can harn some components from igbt.the sus boar isnt tested because the tv is not in my home...i will do that tommorow

no human hand can take this piece of shit out...have a large radiator
which absorb all the heat...the air station will not do the job and my reflow oven is smaller than board.pfuuu

[Alastair E]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Thick Copper Strips, say some copper pipe flattened-- Two of em separated by 30 thou steel/whatever, and clamped/screwed together leaving small channel for the pins.

Make as long as the row of pins.

Heat up with Blowlamp till flame goes blue/green (prolly about 400 degrees) then tin properly.

Apply to the row of pins and apply solder/flux.

Let heat do its job for say 15/30 seconds.

Lift one side of IPM.

Do same other side.

Job done, no dramas or damage. I do LG IPM's same way, Nice easy and Quick!

Then you have the problem of finding replacements!
--Thats how I Used to do LG IPM's....

These days, easiest way for the LG type is just rip it off the board--Complete with heatsink! The side frame and pins of the dead IPM part company with surprisingly little force leaving two rows of plastic holding the pins on the board, and the pinless dead IPM on the heatsink!

Easy then to cut the plastic and desolder each pin one by one...

[speciess]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Thick Copper Strips, say some copper pipe flattened-- Two of em separated by 30 thou steel/whatever, and clamped/screwed together leaving small channel for the pins.

Make as long as the row of pins.

Heat up with Blowlamp till flame goes blue/green (prolly about 400 degrees) then tin properly.

Apply to the row of pins and apply solder/flux.

Let heat do its job for say 15/30 seconds.

Lift one side of IPM.

Do same other side.

Job done, no dramas or damage. I do LG IPM's same way, Nice easy and Quick!

Then you have the problem of finding replacements!
--Thats how I Used to do LG IPM's....

These days, easiest way for the LG type is just rip it off the board--Complete with heatsink! The side frame and pins of the dead IPM part company with surprisingly little force leaving two rows of plastic holding the pins on the board, and the pinless dead IPM on the heatsink!

Easy then to cut the plastic and desolder each pin one by one...

Thanks for yours advice,i will try this tonight also i will try with reballing machine...if nothing work i give this for death.

Have a nice day!
Ahh,this IPM is coming encapsulated with no access to the components?or the heat sink can be riped away ?

[ReeceyBurger123]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Normally the underside of the Ipm exposes the parts inside, but some seal it off. You will know when you remove it.

[speciess]

Re: Old school Daewoo DTS-42 Plasma clicks to standby after a few seconds

Ty!