Polaroid TLX-04244B

[2011srg]

Re: Polaroid TLX-04244B

Is this what your talking about?

[tom66]

Re: Polaroid TLX-04244B

Did you test the fuses on the inverter board?

[2011srg]

Re: Polaroid TLX-04244B

Here are some pics of readings

[2011srg]

Re: Polaroid TLX-04244B

So i did the paper thing both boards are buzzing but I can't tell if both or just one of them are doing it

[retiredcaps]

Re: Polaroid TLX-04244B

So are these reading ok, do you think that the control board could cause this?

The master and slave inverter numbers are so far apart, I don't know which, if any, are the correct ones.

[tom66]

Re: Polaroid TLX-04244B

So are these reading ok, do you think that the control board could cause this?

Here's a test to try. Get a sheet of newspaper or printer paper. Roll it up into a small tube. Place the tube against your ear. Turn the TV on and search for the buzzing sound. It's possible a transformer is arcing over internally and the one making the sound is probably the faulty one. The resistance test isn't perfect; it can miss certain failures.

[2011srg]

Re: Polaroid TLX-04244B

So are these reading ok, do you think that the control board could cause this?

[2011srg]

Re: Polaroid TLX-04244B

Yes the part numbers are the same.
Master
Transformer T2. S1-S2 = 37.7 Ohms
Slave
Transformer T2. S1-S2 = 35.6 Ohms

[retiredcaps]

Re: Polaroid TLX-04244B

1) Is the slave inverter transformer the exact same part number as the master?

2) Let's measure the secondaries one more time, but now put you meter on the 2000 (two thousand) scale. Report these findings.

[2011srg]

Re: Polaroid TLX-04244B

I'm sorry i wrote it down in note pad and must of gave you the wrong numbers

Master Side T1. S1-S2 = 4.91 Ohms
transformer T2. S1-S2 = 4.92 Ohms

Slave side
Transformer T1. S1-S2 = 7.67 Ohms
Transformer T2. S1-S2 = 7.67 Ohms
And these are identical down to the last decimal place

[retiredcaps]

Re: Polaroid TLX-04244B

Ok so
Master Side T1. S1-S2 = 4.86 Ohms
transformer T2. S1-S2 = 4.86 Ohms

Slave side
Transformer T1. S1-S2 = 5.17 Ohms
Transformer T2. S1-S2 = 5.17 Ohms

Were the transfomer readings were identical down to the last decimal place?

Or is it a cut and paste error?

[2011srg]

Re: Polaroid TLX-04244B

Ok so
Master Side T1. S1-S2 = 4.86 Ohms
transformer T2. S1-S2 = 4.86 Ohms

Slave side
Transformer T1. S1-S2 = 5.17 Ohms
Transformer T2. S1-S2 = 5.17 Ohms

[retiredcaps]

Re: Polaroid TLX-04244B

Ok so here are my new readings

1) Your finding would be easier for us to interpret if you report it like this example

Master side
transformer T1. S1-S2 = 777 Ohms
transformer T2. S1-S2 = 773 Ohms

Slave side
transformer T1. S1-S2 = 774 Ohms
transformer T2. S1-S2 = 773 Ohms

2) Please perform the test again to verify your findings.

3) There seems to be a lot of people who are mis-interpreting their manual range multimeter readings.

A multimeter always gives a reading. "1" on the left hand side of the display means the reading is "out of range".

1.0 on the right side on the display is a unit of measure (i.e. 1 unit of measure). As you as you turn on the multimeter, it gives you a reading. There is no such thing as "nothing".

[2011srg]

Re: Polaroid TLX-04244B

Ok so here are my new readings on the Master transformer on the right I get 4.88 on both solder points but on the left one (edge of board) i get 4.88 on the right solder point and nothing on the end (edge) and on the slave side I get 7.59 on both solder points on the right one(inside) and of the left one(Edge of board) I get 8.30 on the right one(inside) and nothing on the left(edge)

[retiredcaps]

Re: Polaroid TLX-04244B

On the side of them in the pictures they say T51 . 0165 . 211 E5

1) Over at

http://www.lcdparts.net/T.aspx

there are 6 inverter transformers that begin with T51. None of them are an exact match for yours, but if you click on all 6 that begin with T51 (click on the buy now button), they will take you to a picture of the underside.

2) What you are trying to measure is the resistance between S1 and S2 (the secondaries - see post #7). As you can see, with the T51, the secondaries are on opposite sides of each other. Your job is to find the right one that will give a reading somewhere in the range between 880 Ohms and 2000 Ohms.

3) Since the resistance might be 2001 Ohms, set your multimeter to the 20K scale otherwise it will display a "1" on the left hand side indicating out of range.

4) Once you find the correct combination of pins, repeat for all inverter transformers and report the readings. All readings should be within 3% of each other. If not, you have a bad inverter transformer.

5) Remember to measure resistance with the power off and TV unplugged from the outlet.

6) PS. Clicking on "buy now" won't put anything in your shopping cart. It just gets you more info.

[2011srg]

Re: Polaroid TLX-04244B

On the side of them in the pictures they say T51 . 0165 . 211 E5
0816 70 A S

[retiredcaps]

Re: Polaroid TLX-04244B

1) Is there a part number (or list all the numbers) on the inverter transformer?

2) Take a clear focused picture of the above.

[2011srg]

Re: Polaroid TLX-04244B

The frist pic is on 200 and the second one on 20K. Just making sure this what you are wanting me to do, because i feel like i'm doing something wrong.

[2011srg]

Re: Polaroid TLX-04244B

Ok so I did another test and the left ones still nothing and now with using the 200k the right ones jump from 173.3 to 0.01.

I also tried disconnecting the slave and turning on the t.v no light and no buzzing and did the same with the other one and the same thing they both have to be plugged in for the light to come on.

[tom66]

Re: Polaroid TLX-04244B

Okay, so I'm stumped, that's the right setting, but I'd expect results of "6000" or something for typical inverter transformers. Try again on the 200k range, but that would be very high for those types of transformers.

Another test. While the TV is off, disconnect the slave inverter bulb connector. Turn on the TV. Do you hear the buzzing noise and does the screen light up? Try it with the master board (reconnect the slave). Does the same thing happen? The board that does not produce the effect is probably the bad one.