Panasonic sc tnpa5081 rebuild

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

Fair chance of it being OK, but the buffers may be shot.

I purchased the complete internals from the 3D version here, cracked screen, SC was ok, one buffer board was shot.

It's a gamble.

[Robb]

Re: Panasonic sc tnpa5081 rebuild

I just talked with Panasonic and their local certified repair shop. Even though it's over a year out of warranty, the repair guy said panny usually covers the cost of parts and maybe even some of the labor which the latter my be around $75. There are alot of maybes involved but this maybe the cheapest option.

[tom66]

Re: Panasonic sc tnpa5081 rebuild

G20 is 2010 series, would be surprised if they repair it.

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

I accidently typed Q461 and meant to type Q661. Unfortunately, that's the only one I am finding on ebay.

Any idea where to get the other parts?:

Q16402 DG3D5020CSLW TRANSISTOR 1 DG3D5020
Q16421 DG3D4020CSRP TRANSISTOR 1 DG3D4020
Q16422 DG3D4020CSRP TRANSISTOR 1 DG3D4020
Q16452 B1JAEP000012 TRANSISTOR 1 GT45G128

D421
D422
D16482 B0FACP000003 DIODE 1 RFN25TM4SW

Or do I have to buck up and buy a $150 refurbished board?

Did you notice the abbreviated part numbers I listed for the first fix? they're the same as what is marked on the device.

Search them .

DG502LW, DG402RP ,45G128

As for the diodes, I never found that one, did a dodgy and used a 300v 20A Fast recovery Diode on the last board, but that's a 400v diode. A very cheap SS board from the same tv will yield some useful bits including some diodes you could get away with or order direct from sears or CCE, whoever sells OEM , won't be cheap.

I had one from a SS but killed it and the 45G128 trying to work out what I'd missed.

List the part number against the location, whatever is stamped on the device will do.

I've seen SS boards go for $10.

Any idea where to get the other parts?:

Or do I have to buck up and buy a $150 refurbished board?

I got most from UTSOURCE in china, he ebays as well, they worked although some parts looked a bit sus and some may be recycled but I was happy.

You've seen the parts lists, if you're confident fault finding and soldering surface mounted have a go with the view you may fail and blow $$.

I can't help much more than what you can read through yourself in this thread.

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

when you search in ebay, have a close look at the pictures of the legs, HKUTSOURCE the 45G128 I got that was the first thing I noticed, they were different to the OEM and thinner.

But what I used worked.

[Robb]

Re: Panasonic sc tnpa5081 rebuild

Did you notice the abbreviated part numbers I listed for the first fix? they're the same as what is marked on the device.

Search them .

DG502LW, DG402RP ,45G128

Thanks, I found all but the diodes with the abbreviated reference numbers.

Do you have any idea what the diodes D421 & D422 are rated at?

[Robb]

Re: Panasonic sc tnpa5081 rebuild

Found at Alibaba

D421 RFUS20T4S
D422 RFUS20T4S

[Terryfictv]

Re: Panasonic sc tnpa5081 rebuild

I am about to attempt a rebuild of a TNPA5081AK. Before I begin research and part order, could I use an AP,AF or AY to replace my blown AK ?

Terry

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

I am about to attempt a rebuild of a TNPA5081AK. Before I begin research and part order, could I use an AP,AF or AY to replace my blown AK ?

Terry

Rev AY, as this is a 3D model, the others are 2D. I've only fixed the 2D versions so there are some component changes on the board. You'll find vacancies in certain locations. A schematic or parts list comparison between the 2 types will highlight them.

[Terryfictv]

Re: Panasonic sc tnpa5081 rebuild

Just checked ModusLink PTS and they charge $131.91 for repair / test
of my TNPA5081AK / TXNSC1LTUU . I am now leaning towards that option.
What about the SD & SU boards....they are less than $50.00 each ( new ).
Does anyone have the training manual for TC-P50VT25 ? SM ?
I think there is a service hint or two for 2009 & 2010 Pana Plasma....

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

Surprised this one is not on your list as shorted

Q16661 RJP63F3A

List for three different boards I fixed.

First:
IC16521 M81737FP ,Q16402 DG502LW ,Q16403 DG502LW,Q16421 DG402RP ,Q16422 DG402RP, Q16661 RJP63F3A shorted,IC16773 TC7SH14F,Q16701 MMBTA92 NXP (7E W)
Q16702 2PD601ART NXP (C3 W), Q16022 30F125

second:

Q16661 RJP63F3A,IC16773 TC7SH14F, Q16702 2PD601ART NXP (C3 W), Q16022 30F125
IC16724 5V 78M05

Third: This one was much worse, most likely because I blew it up a second time not finding everything the first time. Blew it at least 3 more times before I nailed it. Lots of additional casualties.

D16451 B0ECKP000055 DIODE 1 ROHM , RF101L4S 400V 1A
D16482 B0FACP000003 DIODE 1 RFN25TM4SW
Q16452 B1JAEP000012 TRANSISTOR 1 GT45G128
D16702 B0ACCJ000048 DIODE 1 MA2J11100L 80v 100ma switching diode?
IC16521 C0ZBZ0001708 IC 1 M81737FP
IC16561 C0JBAU000088 IC 1 PAVCTH c541 buffer ic
IC16562 C0JBAU000088 IC 1 PAVCTH c541 buffer ic
IC16563 C0JBAB000916 IC 1 c14 INVERTERIC16691 C0JBAC000363 IC 1 TC7SH00FU(TE85L,J
IC16724 C0CBADE00049 IC 1 BA178M05FP-E2
IC16771 C0CBADC00072 IC 1 78L05L, TA78L05F
IC16773 C0JBAB000715 IC 1 Toshiba TC7SH14F,
PC16461 B3PBE0000054 IC 1 PS9856-2-F3-AX
Q16402 DG3D5020CSLW TRANSISTOR 1 DG3D5020
Q16403 DG3D5020CSLW TRANSISTOR 1 DG3D5020
Q16421 DG3D4020CSRP TRANSISTOR 1 DG3D4020
Q16422 DG3D4020CSRP TRANSISTOR 1 DG3D4020
Q16521 B1HFPFA00001 TRANSISTOR 1 CPH5524-TL-E
Q16551 B1HFPFA00001 TRANSISTOR 1 CPH5524-TL-E
Q16621 B1JADN000009 TRANSISTOR 1 GT30F125
Q16622 B1JADN000009 TRANSISTOR 1 GT30F125
Q16647 B1CBGD000001 FET 1 2SK3018T106,2n7002
Q16661 B1JAER000010 TRANSISTOR 1 RJP63F3A
Q16701 B1ADCN000007 TRANSISTOR 1 MMBTA92
Q16702 B1ABCF000231 TRANSISTOR 1 2PD601ART,215, 2SD0601A0L
Q16818 B1CBGD000001 FET 1 2SK3018T106,
R16452 D0GF5R6JA047 M 5.6 OHM,J, 1/3W
R16521 ERJ6GEYJ101V M 100 OHM,J,1/8W 1
R16522 ERJ6GEYJ101V M 100 OHM,J,1/8W 1
R16551 D0GD100JA059 M 10 OHM,J,1/4W 1
R16707 ERJ6GEYG392 M 3.9KOHM,J,1/8W 1

Finally found the exact part number for these confirming my suspicions.

IC16561 C0JBAU000088 IC 1 PAVCTH c541 buffer ic
IC16562 C0JBAU000088 IC 1 PAVCTH c541 buffer ic
IC16563 C0JBAB000916 IC 1 c14 INVERTER

They were a toshiba product and the size is unique. I have not found a substitute for the size.

C0JBAU000088, C0JBAU000043 are Toshiba, TC74VHC541FK(EKJ), VSSOP package.Octal Bus Buffer



C0JBAB000916 is a Toshiba, TC74VHC14FK(EKJ), VSSOP, Hex Schmitt Inverter



I've seen these on SC,SS, D (2010 3D models), C and A boards.

If they used the next size up they'd be a lot easier to source and sub.

[bregva]

Re: Panasonic sc tnpa5081 rebuild

It's been a while since I worked on these boards. My customer bought repair kit from Shopjimmy for his TCP50G25 and now I'm installing it for him. Board version is AF. Here is list of parts in this kit:
Q660
Q661
IC501, 521
IC771
D451
D702
D482
Q701
Q421,422
R402,403,421,422
D641,642
Q452
Q402,403
PC461
And last but not least Q818, and I have question about this transistor
As you can see in pics, original one is smaller and marked KN, replacement in the kit is little bigger and marked K72
I still don't have a schematic for this sustain and don't know anything about these devices, are they interchangeable or is it a mistake by someone who assembled the kit? By the way original q818 measures fine, at least same as on my other working board version AL
Also some of the parts were fine on the board, mainly resistors, D641,642 RF2001, D451 they survived, but I replaced them just in case
Oh! Almost forgot, HA inverter was not on the kit!!!!! And it was bad, of course, luckily I have plenty of them in stock
I have not plugged board in yet
Any thoughts tw2005?

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

It's been a while since I worked on these boards. My customer bought repair kit from Shopjimmy for his TCP50G25 and now I'm installing it for him. Board version is AF. Here is list of parts in this kit:
Q660
Q661
IC501, 521
IC771
D451
D702
D482
Q701
Q421,422
R402,403,421,422
D641,642
Q452
Q402,403
PC461
And last but not least Q818, and I have question about this transistor
As you can see in pics, original one is smaller and marked KN, replacement in the kit is little bigger and marked K72
I still don't have a schematic for this sustain and don't know anything about these devices, are they interchangeable or is it a mistake by someone who assembled the kit? By the way original q818 measures fine, at least same as on my other working board version AL
Also some of the parts were fine on the board, mainly resistors, D641,642 RF2001, D451 they survived, but I replaced them just in case
Oh! Almost forgot, HA inverter was not on the kit!!!!! And it was bad, of course, luckily I have plenty of them in stock
I have not plugged board in yet
Any thoughts tw2005?

Yeah, strangely I was having a sticky last night at the prolific expansion of SJ kits and this one in particular. First thing I noticed was that very fact that the schmitt inverter was missing.

I think SJ is just copy catting other kits and not basing them on their own research.

A rather big mistake omitting the schmitt inverter in my opinion as this will result in Q661 blowing and most likely the other small transistors .

If I was going to leave a part out, PC461 would be it but one of mine was shot.

Q818 is a bit tricky checking in cct. Original is a 2SK3018T106,however the K72 is a 2N7002 and will sub but yes is a larger package. That's what I used on the ones that were bad only because it was easier for me to get but soldering it will be a small compromise.

I would err on the side of caution unless you're 100% happy because on my really bad board, I thought it measured ok initially but found a descrepancy down the track which caused me a lot of grief blowing Q661 a few times.

Or remove from cct and check with a good one. If you have a replacement, just as quick to replace it I reckon.

Pretty much anything wrong in the inverter cct or the small 0.1A 5V reg that feeds it if bad will destroy Q661.

Q660 was ok on my 3 boards.

For CCT diag for this one at least, just download the relevant Service Manual. It's all in there, you'll get a better idea of why .

[bregva]

Re: Panasonic sc tnpa5081 rebuild

Success!!!!
TV fired up fine, I was on cloud nine, customer had to pull me down
But before I delivered it, I decided to check one more time and here they were, I missed pair of 30f125's, sure enough they were not included in the kit.
So, I'm thinking what was the reason I had no success on previous repairs on these sustains? Was it Q818, was it opto coupler, IC771 or was it D702? I have not replaced them before. Q818 out of cct measured strange, reading was kind of running up to .550, not instantaneous like on the new one, so I think it was leaky, as for coupler, reading was slightly off, as well on others by a bit too.
All in all kit came handy, was missing key components, but we already know about them anyway, right?
By the way do you know specs on DG402RP and DG502LW? Could come handy one day

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

Success!!!!
TV fired up fine, I was on cloud nine, customer had to pull me down
But before I delivered it, I decided to check one more time and here they were, I missed pair of 30f125's, sure enough they were not included in the kit.
So, I'm thinking what was the reason I had no success on previous repairs on these sustains? Was it Q818, was it opto coupler, IC771 or was it D702? I have not replaced them before. Q818 out of cct measured strange, reading was kind of running up to .550, not instantaneous like on the new one, so I think it was leaky, as for coupler, reading was slightly off, as well on others by a bit too.
All in all kit came handy, was missing key components, but we already know about them anyway, right?
By the way do you know specs on DG402RP and DG502LW? Could come handy one day

Rough figures would be 430V 40-45A, peak pulse 230A & 540V, 40-45A, peak pulse 230A IGBTs, Vce sat 2-2.5V the 2PG006,009, & 011 were their predecessors.

No 30F125, well that's another cockup then. I'll go with Q818, my opto was obvious , had short but that was only 1 board of the 3.

Yeah it's a bit of a thrill with so many bad bits to jag it. Heaps of kits and repair services now for this one. Prices are still high although Moduslink are ok but weird how an AP and AF somehow cost different to repair?

With the other parts were they identical to OEM? More interested in the OPTO and it's markings and any of those TO220 packaged diodes if supplied.

I guess you did not photo the kit before install?

Blindly trusting a kit is a risk for sure. To make the kit complete you'd need quite a few parts. GTV Watford would most likely have the most accurate kit in the UK but a bit pricey.

[bregva]

Re: Panasonic sc tnpa5081 rebuild

No, I did not take pics, bummer!
Some of TO220 components looked aftermarket with thin pins, I was even afraid to brake them while bending for install, I just don't remember which ones. Q661 was substituted by RJP63F4A FYI
So in case I'm short on DG402, which currently I am, is it OK to sub them with DG502's?
I would recommend sourcing parts individually, I usually get small components like HA inverter, 3Y marked transistors or micro SMD diodes directly from Panasonic, they are inexpencive and OEM quality. As for TO220 I source them from IBM trading in HK, if they have what I need, or Chinese suppliers. Sometimes you get lucky and parts you get look real OEM
Once though, I ordered 30F131 SMD IGBT's from Utsource and they were horrible, package was visibly smaller then OEM, did not risk putting them in, reordered with IBM and got real deal

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

I know what you're saying about the thinner leads. I was sus too but they did work and I used UTSOURCE. So IBM trading is your tip. Are we talking internet / Ebay ,??

You could only try switching DG502 for the 402. As far as voltage and current would be no issue.

That would be a nice experiment for you and then share the results.

I'd like find some subs myself that would make it easier to get parts from conventional sources.

Did you contact UT about the parts? I suspect if any were bad they'd refund. In Ebay that's what I saw but that was a while ago.

[bregva]

Re: Panasonic sc tnpa5081 rebuild

I know what you're saying about the thinner leads. I was sus too but they did work and I used UTSOURCE. So IBM trading is your tip. Are we talking internet / Ebay ,??

You could only try switching DG502 for the 402. As far as voltage and current would be no issue.

That would be a nice experiment for you and then share the results.

I'd like find some subs myself that would make it easier to get parts from conventional sources.

Did you contact UT about the parts? I suspect if any were bad they'd refund. In Ebay that's what I saw but that was a while ago.

I use Ebay, it's easier to control shipments and communicate with sellers
I just got 3 or 4 from UTSOURCE, other parts in the order were fine, so I figured why to bother. But here is a pic of 2 transistors side by side, so you can see the difference

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

I use Ebay, it's easier to control shipments and communicate with sellers
I just got 3 or 4 from UTSOURCE, other parts in the order were fine, so I figured why to bother. But here is a pic of 2 transistors side by side, so you can see the difference

Yeah, i'm guessing the left are the ones you're not happy with.

That is the problem from china, fakes. I'll have to pay close attention to what UTSOURCE sends next time. I don't think all of it would be fake but that example looks bad .

also, we just had our second thread regarding TNPA5081 SJ kit no good.

Q661 blown on startup. 30F125 shorted

[tw2005]

Re: Panasonic sc tnpa5081 rebuild

Helping BRADM out with his 5081 SC. (7 blinks)

This one was fairly easy, putting here for repair history.

I did not check SC2 for short but would not expect it to be with 7 blink.

IC16521 M81737FP, FET DRIVER (had an exit wound)
IC16773 TC7SH14F, schmitt inverter ic (used SN74AHC1G14DBVTG4) (shorted)
Q702 2PD601ART NXP (C3 W), (shorted)(used BC846)
Q661 RJP63F3A (shorted)
Q622 GT30F125(R) (shorted) I've reached the conclusion these have pre-bent legs , the R is thay are bent in the reverse direction
Q452 GT45G128 (shorted)
D482 RFN25TM4SW (shorted) ( Again, the R is the legs bent reverse, )
D451 RF101L4S (shorted)

With these replaced, the board is now working again, running it in my TV for testing.