Panasonic tc-l32c22 lcd

[electronicsurplus]

I have a Panasonic TC-L32C22 , which had no power. I bought and installed a new power supply. The set turned on and worked for about 10 minutes, turned it off and now will not work again

I checked for 5v standby and it is 6v instead

Any help would be appreciated please

Thank you
John

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

Here are some pics

Any help please

Thank you much

Jon
Electronic Surplus

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

Here are the voltages from the output connector

1= 6.36
2= 6.36
3= 0
4= 0
5=0
6=0
7=0
8=0
9=0
10=0
11=0
12=0.57
13=0
14=0.75
15=0
16=0

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

There is no markings on the connector. How can I determine which is the ps-on? any ideas how I can find ps-on or, to further test this set? Belongs to my neighbor and I would love to look like a hero to the kids. they would be very happy if their tv was fixed. they do not have much at all

Jon

[tom66]

Re: Panasonic tc-l32c22 lcd

How is the battery in your meter? Test a new AA battery - you should see around 1.5 to 1.6V.

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

Changing the batteries in both meters right now because, I am getting 2 different readings from each meter even though both readings are within a volt in each. One is a Fluke 8060A true RMS multimeter and the other is an Atten AT9205C (chinese but, new and seems pretty good

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

Also, bear in mind, I have 2 power supplies and, they are both acting the same. I replaced the power supply because I found one on Ebay for $20 and, it actually worked but, once I turned the power off to replace the cover thinking it was fixed, it would never turn back on.

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

changed both batteries to brand new and the results are exactly the same

[tom66]

Re: Panasonic tc-l32c22 lcd

Okay post a shot of the green (under) side of the PSU PCB. Clear, detailed, and close as possible to 2000x2000 pixels but not exceeding. If necessary, break it down into multiple shots.

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

Ok

1 of the entire board and, 4 of the 4 corners starting with top left, top right, bottom eft and bottom right

Jon

[tom66]

Re: Panasonic tc-l32c22 lcd

Thanks for the pics. What's the part # on this device?

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

The Power supply is TNPA5123 CA , The television is TC-L32C22

[tom66]

Re: Panasonic tc-l32c22 lcd

What about on the highlighted device? I'll try to find schematics.

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

The highlighted device is the TV model #

Panasonic tc-l32c22

[selldoor]

Re: Panasonic tc-l32c22 lcd

Tom means the number that hopefully is on the IC with 20 legs that is ringed in red on the picture. You may need a magnifying glass and try rubbing it gently with isopropyl alcohol.
If it is the same as the tv number I apologise.

[randtek]

Re: Panasonic tc-l32c22 lcd

On the P2 Power board connector, the TV_SUB_ON (Power on from micro) is on pin 9, the Inverter On is pin 13. First, pin 9 should go to >3v to turn supply on, followed by the Inverter On pin.

[randtek]

Re: Panasonic tc-l32c22 lcd

By the way, are you getting any blink codes on the Power LED? Or is the unit completely dead.

[multimeter]

Re: Panasonic tc-l32c22 lcd

if the tv worked with a new supply,but didnt when reassembled ,i would take the back off again and reseat all connector cables,(unplug and re-plug in),and making sure the psu ground points are grounded,and have a check and double check on the tv's side buttons.the little tact switches if jammed will cause this problem,if one jams on, the set will sense it and not respond to remote or the side buttons

[selldoor]

Re: Panasonic tc-l32c22 lcd

Attached are for OP unable to send by PM

[electronicsurplus]

Re: Panasonic tc-l32c22 lcd

So, correct me if i am wrong. It looks as though the 115V goes to the fuse and then to the Rectifier, then to the 5V standby transistor so, if no 5V I should look to this transistor

I think i will find a properly working power supply to determine

I apologize IF i seem dumb but, I obviously am. I must be skipping some chapter or something because, I am surely missing something here


Thank you for your help in trying

I guess I will just need to study more to hopefully someday understand


Jon

Attached are for OP unable to send by PM