WestingHouse L2210NW Will not power.

[retiredcaps]

Re: WestingHouse L2210NW Will not power.

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

[retiredcaps]

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?

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]

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

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.

[testas86]

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?

[testas86]

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

[retiredcaps]

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]

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

[retiredcaps]

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 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]

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

[sabre504]

Re: WestingHouse L2210NW Will not power.

Hi sorry to butt in but this board apart from maybe the pins that connect to the logic board
is the same as the board they use in the acer 1916 maybe another to look at for spares or comparison

[retiredcaps]

Re: WestingHouse L2210NW Will not power.

k3114 measurements:

com pin 1 red pin 2= 1. set on 2k ohms
com pin 1 red pin 3= 1. set on 2k ohms
com pin 2 red pin 3= 1. set on 2k ohms

These measurements indicate that K3114 is NOT shorted. It is a good transistor. 1 means out of range on this multimeter. That means, the resistance is greater than 2000 ohms.

The 1 should show up on the left hand side of the multimeter display.

Many newbies seem to confuse 1.0 ohms (on the right hand side of the display) with 1 (on the left to indicate out of range). My meter says 0L to let you know it is out of range. So if you interpreted 1 (on the left) has 1.0 ohms, I can see how you thought this transistor was shorted.

stpf1020ct measurements:

1) red on pin 1, black on pin 2. -1.
2) black on pin 1, red on pin 2. -1.
3) red on pin 3, black on pin 2. -1.
4) black on pin 3, red on pin 2. 1.

Those don't look right to me, but let's assume they are good for now.

I suggest if you still have 1 second to black that you move onto checking the CCFLs and tranformers.

[testas86]

Re: WestingHouse L2210NW Will not power.

with the mastech

SET TO 200 .7 when touched red and black probes together


k3114 measurements:

com pin 1 red pin 2= 1. set on 2k ohms

com pin 1 red pin 3= 1. set on 2k ohms

com pin 2 red pin 3= 1. set on 2k ohms


sbf1060ct measurements:

1) red on pin 1, black on pin 2. 1. set on 2k ohms also where the diode test symbol is
2) black on pin 1, red on pin 2. flashes from 1. to 800 down to 400 and back up
3) red on pin 3, black on pin 2. flashes from 1. to 400 down to 81 and back up
4) black on pin 3, red on pin 2. flashes from 1. to 800 to 870

stpf1020ct measurements:

1) red on pin 1, black on pin 2. -1.
2) black on pin 1, red on pin 2. -1.
3) red on pin 3, black on pin 2. -1.
4) black on pin 3, red on pin 2. 1.

[retiredcaps]

Re: WestingHouse L2210NW Will not power.

i also have a mastech mas830L

I'm sure the mastech will be way better. I hate to ask, but please redo ALL your measurements again. I have no faith in the DT-830b readings (I have one and it is busted).

It shouldn't take you more than 5 minutes to remeasure. Please post results including the reading when you touch the two probes together (this is your baseline/calibration).

[testas86]

Re: WestingHouse L2210NW Will not power.

i also have a mastech mas830L

[testas86]

Re: WestingHouse L2210NW Will not power.

its a DT-830b digital multimeter

and .7

[retiredcaps]

Re: WestingHouse L2210NW Will not power.

See that arrow symbol (in the red box) just right of the 200 ohm? That is your diode test function. Please retest the diodes with that function. Or are the results in post #32 done with the diode test?

BTW, I have that exact same multimeter. It is absolute crap. I got a different one.

Question: After you test the diode in diode setting functionality, switch it back to 200 ohms and touch the red and black probe together. What reading do you get?

[testas86]

Re: WestingHouse L2210NW Will not power.



this is my multimeter

[testas86]

Re: WestingHouse L2210NW Will not power.

ok i retested the transistor com 1 and red 3 and it came back 1 at 200ohms

sbf1060ct measurements:

1) red on pin 1, black on pin 2. 130
2) black on pin 1, red on pin 2. numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. 129
4) black on pin 3, red on pin 2. numbers seem to keeps going up with out stop


stpf1020ct measurements:

1) red on pin 1, black on pin 2. 419
2) black on pin 1, red on pin 2. numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. numbers seem to keeps going up with out stop
4) black on pin 3, red on pin 2. just shows a 1 on the left side

[retiredcaps]

Re: WestingHouse L2210NW Will not power.

k3114 measurements:

com pin 1 red pin 3= meter set to 20kohm reads 10.02

sbf1060ct measurements:

1) red on pin 1, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop

Let's try this again.

What is the make and model number of your multimeter? For example, you might answer Craftsman model 34555.

For the transistor test, just choose the 200 ohm setting and leave it there. Retest pin 1 to pin 3. If it reads 1 on the left hand side, the multimeter is telling you the resistance is > 200 ohms. If it really reads 10.2 ohms, it is shorted.

For the diode tests, choose the diode setting on your multimeter. It will look like an arrow pointing to the right. Once you find it, retest the diodes.

[momaka]

Re: WestingHouse L2210NW Will not power.

sbf1060ct and stpf1020ct measurements look good. The reason you get a resistance that constantly goes up is because your meter is charging the electrolytic capacitors.
Also, if your meter doesn't have a diode/continuity test, use the 2000 Ohm scale only to test diodes. Out of circuit, a good diode will test between 100 and 1000 Ohms one way and appear open circuit the other way. A bad diode will show close to 0 ohms (short circuit) in both directions.