Pioneer PDP-436SXE schematic/service info needed

[Alastair E]

Ive rescued a pretty smart clean and tidy Pioneer 43" set that did work.

In my infinite stupidity, I removed the back to check it out, clean out the dust etc, and now it doesnt!--What a prat!

Ive got no front led/standby red led light or any other indication there's supply to it.

Internally Ive got 3.3V coming from the PSU no other rails, and a tiny red-LED near a large S.M. chip on what looks to be the syscon/control-board will illuminate when the standby/on button is pressed, press the button again and it goes out.

I'm thinking that along with that 3.3V from the 'small' standby section of the PSU, that there maybe should be another rail too--maybe the 7V line, but without further info/schematic I'm a bit stuck!

No fuses blown, nothing horrible, no iffy looking caps (United/Nippon Chemicon throughout by the look) the set is in very nice internal condition with little or no dust....

Thats all I get, no relay clicks, nothing else, nothing to indicate there's even power to it, apart from the 3.3V and that tiny red led inside.....

[newtothis]

Re: Pioneer PDP-436SXE schematic/service info needed

pics of board and one of entire back of set

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

Its the Service Info or Schematic I need, surely all of this model are going to have the same chassis, so what good is a picture of it?

[mmartell]

Re: Pioneer PDP-436SXE schematic/service info needed

Does this model have the Intrusion/Tamper switch ? If so you need to do a Factory Reset to clear it and it will work again.

And it's S.O.P. to post pics.

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

SOP....?

TBH--Posting a pic for me at the mo is a PITA!

With regards anti-tamper, Ive no idea. Ive looked for any type of switch the back cover may operate, but cannot locate any. I understand that to do the factory reset requires the official remote--Which I dont have....

[newtothis]

Re: Pioneer PDP-436SXE schematic/service info needed

Well we ask for pics because not all sets have the same revisions of boards, we may also see things that you have not spotted, also we do not know your background and do not know if you know everything to look out for... we also do not know the positions of the connectors off by heart and don't really want to have to go searching for them.

That being said.. if all you are after is the service manual/schematic... Google is good

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

Ah--Yes, I do see your point!

Well just to give you an idea, Been repairing TV sets and all that for around 30 years, my work full-time job is repairing just flat-screen TV sets all day long!

Never seen one of these before though, not a common set it seems round here!

Ive been over and over this thing, had the PSU out and in numerous times, convinced there's a supply supposed to be there in addition to the 3.3V from the PSU....

The service guide only mentions faults that either illuminate or flash the front user-control LED's
--I have none flash or on at all....

Any idea where Pioneer are likely to hide that damned anti-tamper/Trap-Switch as a first step...??

[mmartell]

Re: Pioneer PDP-436SXE schematic/service info needed

SOP = standard operating procedure

I have the PDP 4360 still hanging on my wall. Damn fine picture. Mine has the separate Media Receiver (R06U) and at one time I was having problems with it and removed the cover to have a look. Would not start after that until I did the factory reset. I thought I remember reading at the time that the panel had the same tamper switch as well but I didn't mess with the panel and could not tell you where to look for it. On the media box it was essentially a leaf switch so can't be too hard to spot if similar.

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

Ive checked on the web, and this trap-switch on the Pioneers is (normally) fairly obvious.

Its mounted on the right-hand chassis rail, that has the wall-mounting holes in, either on the left-hand side of the rail or in the rail itself adjacent to the lower bolt-hole for the wall-mount--A pretty obvious affair, big square white plunger switch......

My set has no such obvious part. Just a guess,--Its either been 'deleted' in the past--or was never fitted.

Looks like I'll have to pay for a schematic--only seems to be available from those 'pay to download' service-info sites....

[cliff_hootarski]

Re: Pioneer PDP-436SXE schematic/service info needed

Perhaps this helps.

Never mind, I see above you already have this guide.

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

Thanks Cliff, Looks to be the same guide, still doing battle with this set, have replaced a few caps--just for the hell of it, still no go yet!

Plotting things through, the 'small' stby PSU does seem to derive two possibly three rails, the 3.3v seems to be the 'heaviest' with a smaller current 10V rail that seems to disappear somewhere along the road,--maybe thats supposed to eventually be the 7V line It does lots of twisting round through board Vias and other stuff...

I'll get there-eventually--Somehow!

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

God--These Pioneer Plasmas have a damned Good Picture!

--Better than my 50PZ80 Viera Panasonic,--which I thought was pretty damned good....

Yup--I fixed it! There was a poor connection on a 'Via' under C361 of the PSU board. Resoldering didnt cure it, I had to remove (actually replaced) this cap 1000uf/35V and leave a gap between the cap and the board to solder it both sides to cure the fault.

On stby, there doesn't appear to be any differences in supplies--except 1 voltage.

The 'AC-DET' pin of PSU is 3.3V instead of the '0' it was under fault-conditions.

Oh--There wasn't a Trap-Switch on this set, so I don't feel such a prat after all, I'm guessing this was the fault all along!....

[mmartell]

Re: Pioneer PDP-436SXE schematic/service info needed

God--These Pioneer Plasmas have a damned Good Picture!

--Better than my 50PZ80 Viera Panasonic,--which I thought was pretty damned good....

I still marvel at mine and I've had it for coming up on 10 years I think ?? When I go into the stores I'm still hard pressed to find as good a picture.

Too bad the screen is tiny by todays standards.

[tom66]

Re: Pioneer PDP-436SXE schematic/service info needed

Shame Pioneer didn't make any 1080p plasmas below 50" though. I'd really like a 43" Pioneer if it were 1080p. Would look quite nice on the wall (small room.) Have a 46" PZ80 now, that's a nicely built TV!

[Alastair E]

Re: Pioneer PDP-436SXE schematic/service info needed

I bought this 50PZ80 new, even made a steel-frame to mount it to the wall hidden behind curtains....

Ive never seen inside mine--thankfully been totally reliable, but I agree--The Pan sets are pretty well built!
This Pioneer though, is pretty hard to beat!

[tom66]

Re: Pioneer PDP-436SXE schematic/service info needed

They have a few odd issues with the power board (but easily fixed); aside from that, they are extremely reliable. Easily the most reliable TV IMO.

[As_Sanya]

Re: Pioneer PDP-436SXE schematic/service info needed

SOP = standard operating procedure

I have the PDP 4360 still hanging on my wall. Damn fine picture. Mine has the separate Media Receiver (R06U) and at one time I was having problems with it and removed the cover to have a look. Would not start after that until I did the factory reset. I thought I remember reading at the time that the panel had the same tamper switch as well but I didn't mess with the panel and could not tell you where to look for it. On the media box it was essentially a leaf switch so can't be too hard to spot if similar.

Hi. I have the same problem. The Trap switch. Cannot reset it back . Reading the service manual here which says I need to send to RS-232 the command
TSN Disable the TRAP switch
TSY Enable the TRAP switch
The com port should be at 38400bps. But by default the RS-232 is not working. SR+ is switching instead. I connected to the port via PUTTY set the speed but cannot send the command. What did you do to reset the switch or to come back to the factory settings?

Thanks. Alex

[kobkobk]

Re: Pioneer PDP-436SXE schematic/service info needed

i also used best tv Pioneer PDP436sxe,my problem after 2 hour or more of used ,shut down the t.v for 2 sec can't turn on the t.v,only disconnect the main power out.
if you got the service manual for this model pls.send it
thank you
kob