Re: Panasonic TCP50C2 10 Blinks
Yeah, had the pin out wrong...hahaha....
All 3 of those units are bad. Again I get about 300kohms when I should have 3Mohms. I'll order them later today...found in stock at Mouser. 3.50 for 6 of them but 20 in shipping...blahhhh
svc
Member
Last Activity: 12-26-2023, 02:52 PM
Joined: 10-30-2013
Location: Ontario
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Re: Panasonic TCP50C2 10 Blinks
Sorry, forgot to subscribe to this thread. Yes, that was thanks a million!
The FET driver is fine. In testing the transistor packages, they're either bad or I have the pinout wrong:
(Where both emitters and both bases are connected)
PNP:
B - 1/4
C - 2
E - 3
NPN:
B - 1/4
C - 5
E - 3
Do I have these right? If so...how do I go about testing them? I would think a simple open circuit across each C - E would do it...but they're...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
That was after 4pm in the afternoon for me. Can I edit a post on the basis of not looking like a fool? I promise I understand the concept of a fuse...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
I can't believe I forgot how a fuse works...biggest brain fart I've ever had...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
I will certainly report back with my status on the SC board rebuild! Most items on your list I have verified as bad so hopefully mine isn't any worse.
I moved the TV while vacuuming today and a quick glance has posed another question. There are several fuses on the P board...while I (think I) verified it not to be bad, all the fuses measure as short circuited. I've never seen a fuse with coloured stripes and haven't had any luck finding a replacement part or even any specs. Thoughts?
And I second that...best...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
Yeah I caught that! Would have been worse if you had said "It's worth damaging another SC"...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
Well lucky me then! To be honest, two weeks ago the only thing I'd ever done to a TV was turn it on and adjust the volume. I've since fixed a 42" successfully, am confident that the IGBTs I have en route will fix a 50" and it seems like my second 50 is going to be a pet project for months to come.
I don't have any equipment fancier than that...save for a logic analyzer that is probably of no use unless CAN or I2C comms show up. I've soldered an 80 pin IC before by hand and that made me want to quit school and...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
I found that through Google! Along with the two other documents I attached. One I think I grabbed through some random forum and the other (along with the previously linked one) were actually straight from Panasonic's website.
I picked up two 'broken' plasma TVs from the classifieds after I fixed my sister's TV by soldering two new caps to two standoff boards of a 42" TV's power supply (MC201 and 301) and thought "wow I can do this." Pffffffffffffffft WRONG. So I've just recently adopted this as a hobby...Leave a comment:
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Re: Panasonic TC-P50G25: SD/SU Resistance Test
My Vfo -> ground reading is just under 500k. Guess I need new boards. Test procedure is attached...on slides 43/44
I must have skimmed past post 58. For reference, here are my results at the connector (strange that they're different...) :
SU:
Red on ground, black to pins:
1 - OL
2 - 574k
3 - OL
4 - 220k
5 - OL
6 - OL
7 - OL
8 - 300k
9 - OL
Black on ground, red to pins:
1 - OL
2 - 479k
3 - OL
4 - 220k...Leave a comment:
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Re: Panasonic TCP50C2 10 Blinks
That worked almost too well to be true. Thanks 10^6Leave a comment:
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Panasonic TC-P50G25: SD/SU Resistance Test
I have a Panasonic Troubleshooting Handbook for this model that describes some resistance tests for the SU and SD boards. I am getting some...different...readings than specified, but none to indicate a short circuit.
For my SU board, I read infinite (more than 50Mohms, anyway) between the TPSU18 ground test point and TPSU15, TPSU16 and TPSU17. When I used the pad around where the VF Ground screw would be (my SC board is currently removed for me to rebuild) I have these readings:
VF Ground to TPSU18: Infinite (> 50Mohm) which is odd since it is the same point, no?... -
Re: Panasonic sc tnpa5081 rebuild
Thanks! I have a slight issue with mine now that I'm into the document, but its beyond the scope of this thread, so I'm off to start a new one...Leave a comment:
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Re: Panasonic sc tnpa5081 rebuild
Forgive the noob questions...I've seen a lot of references to "buffers" throughout Panasonic posts and I'm wondering which boards that refers to? And what is the diagnostic for one to be considered bad?
Thanks in advance!Leave a comment:
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Re: Panasonic TCP50C2 10 Blinks
Thanks tw2005! I found a 5 pack of the IGBTs on eBay for $10 so I'll try that first. I attempted to spec the transistor but there are minute differences between the E2 and E3 which leaves me with a lot of uncertainty about the E4 so I'd rather not push my luck. If these don't work, I'll pick up a new board.
That said...I got the pins off the board without issue but I'm struggling with the body of the units...any tips for removal?
Thanks again!!Leave a comment:
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Panasonic TCP50C2 10 Blinks
Hello,
I have a Panasonic TC-P50C2 and it is blinking 10 times upon power-up. So, I found a Panasonic "Technical Guide" (for 2010 13th gen plasmas) which includes a troubleshooting flow chart for blinking LEDs. Results are as follows:
1. Disconnect SS and SC boards - # of blinks changes to 7
2. Reconnect SS board - # of blinks changes back to 10
The guide says "Replace the SS board" which I would like to interpret as "Fix the existing SS board" but I don't know what's wrong with it.
The silk screen... -
Re: New Members - please post your introductions here
Hello!
I'm Steven from Ontario, Canada - I have a B.Eng in Electrical Engineering but apparently it isn't directly useful in TV repair
I just have and know how to use a lot of fun tools.
CheersLeave a comment:
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