Panasonic TH-42PZ80U 10 Blink When Warm

[johnboy1313]

It works fine if you let it sit and cool down. Watch it for a while, turn it off and back on, and you get ten blinks. When the set works, there are two clicks from the PSU. When it's working and you shut it off before it's had a chance to warm up, there is one relay click. Once it warms up, when you shut it off, there are two relay clicks and then when you try to power it back on, there are two relay clicks and then there is a third click immediately after the second and you get ten blinks.

I'm going to change the 1uf SMD caps on CM201 and CM301 and report back. I'll look for cracked solder joints while I'm in there.

[tom66]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

I've had exactly this symptom with a PZ80 before.
Never cut out while running - just wouldn't turn on unless it had been turned off for some time before.
Was the MC-module ceramic caps...

[freakaftr8]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Its most likely the mc module on the power supply. Faulty capacitor. Repaired quite a few and had one do that befor and thought it was odd but turned out that it was the problem. that one was probably just on the threshold of failure like the others fail all the way

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Awesome. I've got the PSU out. I saw NorCal's YouTube video. He replaced the ICs on both sub boards as well. I've done the caps once already on a 46PZ80U. It didn't work at all before I fixed it. That's what threw me off. I've got a handful of little ceramic caps in my drawer. I'll swap them in and see if it fixes it.

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Seems like it was just the caps.

[tom66]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Use a little glue to hold those caps down, as they could break off if the TV is transported.

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

ok

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Instead of gluing them on, would it be better to trim them shorter and solder directly to the top left pin of the IC and the one two pins below that?

[tom66]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

I glue mine to the IC with short legs on the capacitor. Takes some practice but works well.

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

Right on. Will do.

[johnboy1313]

Re: Panasonic TH-42PZ80U 10 Blink When Warm

This looks a lot more stable. Thanks for the tip Tom. It was actually considerably easier to do it this way.