This guy has an RCA 42PA30RQ

[Bling23]

Re: This guy has an RCA 42PA30RQ

Oh by the way, I'm not sure if this was effectivepower but this is what I did with the old board. I connected 5v to the y board with my variable power supply. The board started Smoking from one of the zendiodes located near a power ic. It started smoking at 2 volts

[Bling23]

Re: This guy has an RCA 42PA30RQ

I meant Effective not effective power

[Bling23]

Re: This guy has an RCA 42PA30RQ

All of the IC chips did not heat up or burn just that one zen diode

[Bling23]

Re: This guy has an RCA 42PA30RQ

Have another Y-main on order. Seller refunded me my money. I hope this next board is not defective

[Bling23]

Re: This guy has an RCA 42PA30RQ

waveform from control board y-main ribbon connection.

[Bling23]

Re: This guy has an RCA 42PA30RQ

A photo of the Zen Diode that smoked when I tested the Y-Buffer with 10-15V with my variable power suppply. The zen diode started smoking between 2- 4 volts...Upon applying power to the board, I immediatly noticed the current shoot up fast..clearly an indication of a short on the board.

[tom66]

Re: This guy has an RCA 42PA30RQ

If you need any measurements I have one of those boards here.

[Bling23]

Re: This guy has an RCA 42PA30RQ

Sure would like to see them. Thanks for offering Tom

[tom66]

Re: This guy has an RCA 42PA30RQ

I will see what I can do.

My board is defective though, when the Wii controller smashed into the working TV it shorted some panel electrodes together (which have alternating ~200V or 0V), which damaged two of the buffer ICs. I am now suspect of any buffer boards from broken TVs as they may have been damaged. Newer plasma panel uses very thin panel structure (<5mm), meaning shorts are more likely.

So I may have to limit my tests to around other components, I cannot supply measurements for those ICs.

[Bling23]

Re: This guy has an RCA 42PA30RQ

Ok sounds good. Any measurments you have is a help

[Bling23]

Re: This guy has an RCA 42PA30RQ

I tested the new Y-Buffer board and there are no shorts. I also tested the old one and there were no shorts. I followed your video instructions. However, when I supplied voltage, the current draw was increasing fast and then the Zen Diode smoked.

[Bling23]

Re: This guy has an RCA 42PA30RQ

replacement X-Main, control board, and In and out board just arrived .

[venus electronics]

Re: This guy has an RCA 42PA30RQ

Just did same model with same trouble
Had shorted fet's on main Y and X boards
Replaced both boards set works

[Bling23]

Re: This guy has an RCA 42PA30RQ

I did replace the Y-Main and Y-Buffer and no fix. So I figure I recieved a defective Y-main and ordered up another one which I have not recieved yet. But I just replaced the control board and connected the ribbon cable to goes to the Y-main to see if the Vs and Va drops on the PSU after power up and it still does. without the ribbon connected the voltage is stable vs 207v Va 57v

[Bling23]

Re: This guy has an RCA 42PA30RQ

I'm just going to have to wait on the Y-Main board to arrive next week.

[Bling23]

Re: This guy has an RCA 42PA30RQ

Tom what zed diode goes to ZD5400?? On y buffer board.

[tom66]

Re: This guy has an RCA 42PA30RQ

Shoot. Sorry I'm not in Leeds any more and I left the buffer there, I forgot. I'm back in 4 weeks. Sorry.

[Bling23]

Re: This guy has an RCA 42PA30RQ

Just got my X-Tronic 4040 rework station....Love this equipment it makes soldering and due soldering SMD and SMT so much easier. And it's ESD safe. Now I can test some of the SMD components out of circuit. Back to working on my RCA 42PA30RQ.

X-TRONIC" MODEL #4040 - 4000 SERIES - SMD - ESD SAFE - 2 in 1 Digital Hot Air Rework & Soldering Iron Station - 4 Hot Air Nozzles - 10 Asst. Solder Tips - 1 Extra Hot Air Heating Element & 1 Extra Solder Gun Heating Element - 1 5X MAGNIFYING LAMP!!!

[martyparish]

Re: This guy has an RCA 42PA30RQ

Yes, that looks pretty nice and good price! $139 at amazon. I'm jealous

[Bling23]

Re: This guy has an RCA 42PA30RQ

Well I swapped the PSU on the TV, out another $50 and I still have not been able to get this tv going..