TC-P54S1 7 blink

[gdawg]

Hi everybody, I picked up a P54S1 and has the usual blown up SC board # TNPA 4844. The buffers check ok which I was really happy for that.

So far this is what I found
Q661-rjp6065
Q660-rjk6026
Q621,622,623-rjp3034
Q402,403,404-2pg011

there was also
Q422,423,424- 30g123 which I had
D865 which I had
IC464,465 which I had
R402 was open which I had

I am checking all the other items, but I want to get the above items in circuit.

My question is, are there any substitutes for the top items on my list

I can get the parts from individual sellers but I have a lot of parts from other repairs.

Also there are sellers with kits but of course they don't say whats included

Thanks for any help.

[gdawg]

Re: TC-P54S1 7 blink

I just ordered the parts from UT-Source. I will report after all parts replaced and hopefully have a success story.

[Moreno83]

Re: TC-P54S1 7 blink

You need to look up the datasheet from those igbts to see if they are the same. Maybe search for "replacement part".

Sometimes there are upgrade parts that can take higher voltages

[gdawg]

Re: TC-P54S1 7 blink

You need to look up the datasheet from those igbts to see if they are the same. Maybe search for "replacement part".

Sometimes there are upgrade parts that can take higher voltages

Thanks, I decided to just go ahead with the same parts. I didn't have enough of any if there were some equivalents.

So I got everything in and ended up 6 blinks, nothing blowing up again, just 6 blinks.

So I was reading some posts from tw2005 about fakes and decided to remove some of the igbt's and ck them out of circuit.

The rjp3034'S all had different readings by quite a bit and they would change when turning them on. The ones I originally removed were not shorted, but just replaced them in case of stress put on them.

I put those back in and it fired up. I was kinda standing back waiting for the firecracker, but its been running for 5 hours and all looks good.

I think I will try another supplier instead of UT Source or I will be sure to check them before putting them in from now on.

I have a 58vt25 with same situation so I removed the DG502LW"s and same thing. Bad readings. Supplied by UT Source !!! I ordered some new ones from US and will report back on that one when its fixed.

The readings on the DG502lw was starting at 1.2 meg and next turn on was179k and the next was .562 meg. I thought it was my meter so I checked some others I had and the readings were consistent every time.

Sucks to spend a lot of time on a board assuming the parts are good that you put only to find them to be bad. As tw2005 said, the more of these you do, the more you learn. Thanks everybody!!!

[gdawg]

Re: TC-P54S1 7 blink

I forgot to mention I replaced the following parts
Q661-rjp6065
Q660-rjk6026
Q621,622,623-rjp3034
Q402,403,404-2pg011

there was also
Q422,423,424- 30g123 which I had
D865 which I had
IC464,465 which I had
R402 was open which I had
And also
IC724,725,771
Q701,702, 818
IC521, 501
Q501, 502, 531, 521,522, 551
PC461

I did the last group of parts as a precaution.