WestingHouse L2210NW Will not power.

**testas86** · 08-23-2010, 03:23 PM

Re: WestingHouse L2210NW Will not power.

measurements from the transformer on the top left with the black line on it. everything was tested on 2k ohms

black probe on pin 1, red on pin 2 - .872 ohms
black probe on pin 1, red on pin 3 - 1. out of range
black probe on pin 1, red on pin 4 - 1. out of range
black probe on pin 1, red on pin 5 - 1. out of range
black probe on pin 1, red on pin 6 - 1. out of range
black probe on pin 1, red on pin 7 - 1. out of range
black on pin 1, red on pin 8 - 1. out of range

black probe on pin 2, red on pin 3 - 1. out of range
black probe on pin 2, red on pin 4 - 1. out of range
black probe on pin 2, red on pin 5 - 1. out of range
black probe on pin 2, red on pin 6 - 1. out of range
black probe on pin 2, red on pin 7 - 1. out of range
black probe on pin 2, red on pin 8 - 1. out of range

black probe on pin 3, red on pin 4 - .001 ohms
black probe on pin 3, red on pin 5 - .001 ohms
black probe on pin 3, red on pin 6 - .001 ohms
black probe on pin 3, red on pin 7 - 1. out of range
black probe on pin 3, red on pin 8 - 1. out of range

black probe on pin 4, red on pin 5 - .001 ohms
black probe on pin 4, red on pin 6 - .001 ohms
black probe on pin 4, red on pin 7 - 1. out of range
black probe on pin 4, red on pin 8 - 1. out of range

black probe on pin 5, red on pin 6 - .001 ohms
black probe on pin 5, red on pin 7 - 1. out of range

black probe on pin 6, red on pin 7 - 1. out of range
black probe on pin 6, red on pin 8 - 1. out of range

black probe on pin 7, red on pin 8 - justs around from 1.121 to 1.580 ohms

black probe on pin last-1, red on pin last - 1. out of range

**retiredcaps** · 08-23-2010, 03:42 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

measurements from the transformer on the top left with the black line on it. everything was tested on 2k ohms

black probe on pin 1, red on pin 2 - .872 ohms
black probe on pin 7, red on pin 8 - justs around from 1.121 to 1.580 ohms

Hmm, without a spec sheet or another transformer to compare to, I'm not sure if the 2 readings above are correct or not.

Do you have another monitor where you can do the CCFL test?

**testas86** · 08-23-2010, 03:44 PM

Re: WestingHouse L2210NW Will not power.

now i was reading the other things that could be bad and i tested what i think is a fuse (F301) also circled on the attached picture.

i tested it at 2k ohms and got a reading of .004
i also tested it with 200 setting and got .8

Attached Files

**retiredcaps** · 08-23-2010, 03:45 PM

Re: WestingHouse L2210NW Will not power.

I just realized that no one including myself asked if you can still see the video/image if you shine a flashlight on the screen? Please answer.

**testas86** · 08-23-2010, 03:45 PM

Re: WestingHouse L2210NW Will not power.

would any monitor work or does it have to be the same one? cus i have a 17 inch hp monitor just saying around

**testas86** · 08-23-2010, 03:46 PM

Re: WestingHouse L2210NW Will not power.

also there is another transformer on the board as well should i get the readings from that one as well?

**retiredcaps** · 08-23-2010, 03:50 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

would any monitor work or does it have to be the same one? cus i have a 17 inch hp monitor just saying around

It is best to get the same because I'm not sure how a 17 inch length CCFL tube will react in a 22 inch monitor. If the connector, voltage, and current are the same, it shouldn't be a problem.

**retiredcaps** · 08-23-2010, 03:52 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

also there is another transformer on the board as well should i get the readings from that one as well?

It is not the same transformer on the board. The one you measured is the transformer that drives the CCFLs.

Most inverter boards that I have seen have at least 2 transformers driving the CCFLs. Yours only has the 1.

**retiredcaps** · 08-23-2010, 03:55 PM

Re: WestingHouse L2210NW Will not power.

What is the part number of that 4 legged chip next to c66 on the backside?

**testas86** · 08-23-2010, 04:02 PM

Re: WestingHouse L2210NW Will not power.

nikos
p2804nd5g
un45j0a84

**retiredcaps** · 08-23-2010, 04:14 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

p2804nd5g

Okay, we are going to make sure this FET isn't shorted. Set your mastech to 200 ohms (two hundred).

Refer to the attached diagram.

1) black on S1, red on D1 - record/report ohms
2) black on S1, red on G1 - record/report ohms
3) black on D1, red on G1 - record/report ohms
4) black on S2, red on D2 - record/report ohms
5) black on S2, red on G2 - record/report ohms
6) black on D2, red on G2 - record/report ohms

Attached Files

**testas86** · 08-23-2010, 04:25 PM

Re: WestingHouse L2210NW Will not power.

1) black on S1, red on D1 - 1 out of range
2) black on S1, red on G1 - 1 out of range
3) black on D1, red on G1 - 1 out of range
4) black on S2, red on D2 - 1 out of range
5) black on S2, red on G2 - 1 out of range
6) black on D2, red on G2 - 1 out of range

**retiredcaps** · 08-23-2010, 04:41 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

i tested it at 2k ohms and got a reading of .004
i also tested it with 200 setting and got .8

Since your mastech shows 0.7 ohms when the two probes together, it is a good fuse at 0.8 ohms.

**retiredcaps** · 08-23-2010, 04:42 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

1) black on S1, red on D1 - 1 out of range
2) black on S1, red on G1 - 1 out of range
3) black on D1, red on G1 - 1 out of range
4) black on S2, red on D2 - 1 out of range
5) black on S2, red on G2 - 1 out of range
6) black on D2, red on G2 - 1 out of range

FET looks good.

**testas86** · 08-23-2010, 04:43 PM

Re: WestingHouse L2210NW Will not power.

ok good to know thanks. and thanks for walking me through these trouble shooting steps. Does the FET look good?

**retiredcaps** · 08-23-2010, 04:43 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by retiredcaps

Hmm, without a spec sheet or another transformer to compare to, I'm not sure if the 2 readings above are correct or not.

This video (about 8 minutes long)

http://www.youtube.com/watch?v=eNuGWBPRGKA

shows why I'm suspicious about the transformer readings.

Are there any markings on the transformer other than the top?

**testas86** · 08-23-2010, 04:43 PM

Re: WestingHouse L2210NW Will not power.

hmmm ok so then that leaves caps or CCLFs

**testas86** · 08-23-2010, 04:44 PM

Re: WestingHouse L2210NW Will not power.

no just that crack on the top is the only things i can see

**retiredcaps** · 08-23-2010, 04:46 PM

Re: WestingHouse L2210NW Will not power.

Originally posted by testas86

no just that crack on the top is the only things i can see

Can you mark up the bottom side of the picture and tell me how you numbered the transformer pin tests?

**sabre504** · 08-23-2010, 04:56 PM

Re: WestingHouse L2210NW Will not power.

Hi here is a pdf of the board layouts and so on
hope it helps

Attached Files

Dt830_en1.pdf (1.05 MB, 118 views)

WestingHouse L2210NW Will not power.

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