Pioneer Plasma Model# PDP-5070PU main board bad?

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

Can you take a shot so the devices on the heatsink near D201 are visible? Looks like that area has got hot so is a candidate for failed semiconductors.

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

d301,307,372 are the ones i got "bad" readings on and d204 and rc101 are the 2 that according to the manual you are suppose to check to get 390v and i was only getting 174 volts between them

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

Only D204 and R101 are near the PFC section, so for now, those are the only ones of interest.

Any part #s on the PSU board that could be useful in tracking down a schematic?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

i tried all the numbers on there to find 1 and came up with nothing. and did you mean a pic of the heatsink by 204 not 201?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

1h349wa sanken and pdc10287h m and axy1150ae are all the numbers i looked for.and if you meant d204 then d205 and d206 are on the heat sink and i checked them and they seemed fine and they are the ones closest to d204 and the other 2 on the other end are q203 and q204 but i didn't see any signs of heat but i will take a pic

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

Yes heatsink by D204 please.

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

here it is. i don't think i have taken so many pics of one thing in my life. i don't have any kids so thats probably why.

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

D205, D206 test good?
R209 and its partner test OK?

Next to orange cap in this image:
https://www.badcaps.net/forum/attach...7&d=1378645400

what is part # of the 8 pin DIP chip?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

d205 and d206 both read about 435 with neg. ok k pin and pos. on a pin and when reversed they read open. r208 and 209 both read continuity.part # is ICE1PCS02 i think that is it

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

Board removed: resistance between 7 and 1 in 2000ohm scale, should read infinite.
Board removed: resistance between 8 and 1 in 2000ohm scale, should read infinite.

Board installed and turned on, check pin 7 to pin 1. It should be between 11.2V and 21V.

Datasheet for pin numbers:
https://cdn.badcaps-static.com/pdfs/...6c1b368697.pdf

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

i got the infinite reading with the board not installed and my question is what do you mean by installed and turned on? i plugged the plug in for the ac power and the connector into the board and when i checked it said 0v or do i have to plug the connector in for the power button on the front and then turn that on and check it?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

or do i have to connect everything back up?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

i connected everything back up and for the first time the red led on the power supply came on but i don't have any volts at the 1 and 7 pins and the red led on the main board is out and so are the standby and power on light. it isn't screwed to the chassis just sitting there. lol

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

You probably have to screw it down to give it a ground. There may be a bit of back-and-forth as the fault is located.
Yes, everything needs to be connected. TV should behave as before.

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

yeah i figured i would have to ground it but i still get the same thing 0v with the 1 and 7 pins but the thing that baffles me is why now is the light on the power supply on and the main board and the power led and standby led off now?

[tom66]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

Trap switch? Every connector secure on BOTH ends?

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

what do i have the brown-eye sensing error? lol just kidding the brown-out or what is going on? i think i'm just tired i never went to bed yet. i think it is that time to go to bed i'll mess with it later thanks for helping tom it is greatly appreciated and hopefully u will help me to get it going sooner or later

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

all the connectors are secure i reset the trap switch with the remote and when i did i have a jumper wire to connect the 2 wires for the trap switch so it doesn't know i have the back off it turned the standby and power leds off but keeps the power supply led on. when u get the trap switch error that leaves both the standby and power light on constantly now i don't have any lights other than the red led on the power supply.

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

think maybe the eeprom needs to be reset? if so how do u do it? i don't know what else to think of. i just unplugged the tv and plugged it back in and now the red light on the power supply is off and the standby and power light are on constant again. wtf

[philliesfan30m]

Re: Pioneer Plasma Model# PDP-5070PU main board bad?

any ideas? where to go next? or is that DIP chip bad?