Panasonic Q661 Replacements (TNPA5175 SC Board)

[midnightg35x]

Are there any readily available Q661 replacements for the panasonic SC boards (TNPA5175 in my case)? I have used a repair kit from shopjimmy, but it does not have that particular IGBT in it. Finding just this part seems difficult. The original part was a Renasas RJP63F3. Renasas stopped making this a long time ago and they do not have any modern TO220FP IGBT's anymore. I don't trust ebay for IC's, so I want to avoid that route. Based on specs, the ST STGF20M65DF2 looks decently close and readily available. Does anyone have any other suggestions or recommendations on finding just that part? This is the only part left to replace on my SC board for a TC-P65S2 before I try it out again.

[Unspun01]

Re: Panasonic Q661 Replacements (TNPA5175 SC Board)

I was repairing an SC board TNPA4782 from a 50" Panasonic Plasma TV TC-50PS14.

My Q661 was bad and a kit I ordered somewhere supplied part RJP6065 as a replacement for Q661.

From the datasheets for RJP63F3 and RJP6065, both parts are 630V, with Ic=40A (at Ta=25°C).

You could start there.

The STGF20M65DF2 has higher Vce = 650V which is good, and comparable Ic=40A (at Ta=25°C) so that looks like a good part to order.

Also, how does that repair kit not have Q661? Q661 is literally failed in EVERY SC board I have ever repaired. Q661 should be in EVERY repair kit.

Can you please include the complete part listing of your kit (as identified by component locations) so it may benefit others reading this forum? Maybe a photo of the sheet that came with the kit?

Thanks.

[midnightg35x]

Re: Panasonic Q661 Replacements (TNPA5175 SC Board)

I was repairing an SC board TNPA4782 from a 50" Panasonic Plasma TV TC-50PS14.

My Q661 was bad and a kit I ordered somewhere supplied part RJP6065 as a replacement for Q661.

From the datasheets for RJP63F3 and RJP6065, both parts are 630V, with Ic=40A (at Ta=25°C).

You could start there.

The STGF20M65DF2 has higher Vce = 650V which is good, and comparable Ic=40A (at Ta=25°C) so that looks like a good part to order.

Also, how does that repair kit not have Q661? Q661 is literally failed in EVERY SC board I have ever repaired. Q661 should be in EVERY repair kit.

Can you please include the complete part listing of your kit (as identified by component locations) so it may benefit others reading this forum? Maybe a photo of the sheet that came with the kit?

Thanks.

I'll include my working sheet on what I've replaced on this board. No sheet was included with the repair kit, just labeled bags with the components in them. Not everything was blown on this sheet, but I took a combination of other posts on what to replace. First list has parts that are included with the kit (from a popular repair site) and things in the second list are ones I found from outside distributors (Arrow, Mouser). I completely agree Q661 should be included, but it is not. Even trying to find out the ref des of the parts included in the kit was like pulling teeth. They would only confirm if a specific part I asked about was included, not just give me the list. I thought it was a bit ridiculous. So I just bought it anyway and filled in the pieces, but Q661 was certainly a missing piece.

Panasonic TC-P65S2 TNPA5175

Parts included in kit:
Q402-406 - DG502 - In Kit
Q421-425 - DG402 - In Kit
Q621-Q623 - 30F135 included in kit
Q660 - RJK602 in Kit Tested Good on Board
Q501,502,521,522,762 in Kit
IC771 - TA78L05F-TE12L - Included in Kit
IC501 - Included in kit Mitsubishi M81737FP
IC521 - Included in kit Mitsubishi M81737FP
D652 - Included in kit
IC786 - Included in kit

Parts not included that I sourced
D401-403 - F50ALW OEM - RFU20TM5S (530V 20A)
D421-D422 - FUS20T4S 430V 20A (FMXS-2206S 600V 20A)
D641-D643 - OEM RF2001 - Tested Good On Board
Q601 - RJK6026 (600V 5A TO-220 insulated N channel)
-(TK7A60W5,S5VX sub)
Q661 - RJP63F3A - Not included in Kit
-ST STGF20M65DF2
Q701 - MMBTA92
Q702 - 2PD601ART
IC773 - TC7SH14F - NEED SMV size!
R402-406, R421-R425 - 7.5 ohm 1206 1/3W
R452-R454 5.6 ohm 1206 1/3W
R681-R683 10 ohm 0805 1/4W
Q16021 and 016022 on SS board to check!

[midnightg35x]

Re: Panasonic Q661 Replacements (TNPA5175 SC Board)

Well, I did something I shouldn't have because I was trying to work too quickly. I got everything reinstalled, did the resistance isolation test and had SC50 jumpered. Everything looked good there. No blinks, green LED on the SC board, things looking good. I turned it off and reinstalled the Vfg screws and the ribbon connectors. HOWEVER, I did NOT remove the jumper from SC50. TV turned on for a few seconds, and then I saw a big spark. Shut everything down and noticed Q701 had a hole blown through it. SC2 had a short across it like it always would appear to. So I have to go back through and see what I all took out again. I'm debating if I'll attempt the repair again or not. I don't know if leaving SC50 jumpered with the SD and SU boards connected would cause this (I couldn't anybody who accidentally did the same thing), but I'm going to operate on the premise that it is what caused it. Everything on the SC board seemed good when it was isolated, and I checked that my buffer boards were not shorted. The only thing I could not verify was the 5V_F lines on the SD board. I used a reference on the site for what the resistances should be, but when you are trying to accurately measure in the megaohms, the type of meter becomes really critical to be able to compare measurements. I use a fluke 187, and it doesn't usually read much above a megaohm. My 5V_F lines are not shorted, but they don't read 5MOhm either (somewhere around 600k). I don't know what else to check on the SD/SU boards anyway.

Long story short... anybody kept SC50 shorted in regular operation? Or does anyone know if that would have caused my second failure?