Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

[Boyd1966]

I have read several threads about their plasma's taking a long time to turn on or for the picture to show up. Mine turns on, sound is fine, remote is fine. The issue is it takes about an hour for the picture to show. Pixel by pixel and then eventually the picture is fine. The TV is about 12 years old. Pay a lot for it at the time. Originally I was going to buy a new LCD but after more research I am thinking maybe I can fix this TV but I am not sure...thus my post here.

Note this TV has two pieces. The plasma display and the media receiver.

Can someone diagnose my problem?
Is is a power supply issue?
Capacitor issue? I haven't opened her up yet but I will once I determine if its worth it.
Z-sustain or Y-sustain?
Main board?

Here are two pictures. The black screen is when it first turns on. The second is after 30 mins. Another 30 min the picture is clear and fine.

[dskall]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Reset connectors to panel with power off

[ReeceyBurger123]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Wow looks like the panel is worn out, try upping Vsus via the service menu that will fix it. Also the connectors to the panel are bonded to the boards DO NOT PLAY WITH THEM !

[llonen]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Is this a sudden occurrence or has it slowly been getting worse.

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Thanks for the responses. It started about a year ago. At first, it only took 30 sec, then longer then longer and now it is just over an hour for a clear picture to show.....keep in mind that a perfect picture does eventually come.

I am technically inclined but I have never worked on a TV before. I probably could do it with guidance. Also keep in mind that I am not a professional and I only knew about the zsus, ysus, cap issues, main board etc from reading this forum.

How do I up the Vsus? and how do I get to the service menu?

I did pay $8K US back in 2004 (still makes me sick to my stomach). That's why I want to see if it is worth fixing. But she has stood the test of time so far....just a little slow as we all do when we get older. haha

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Bump

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Probably should take pictures of entire back of set with back off, good clear and focused. Should take some voltage readings of Va, Vs, and perhaps leave meter in during the whole warming up process. I am no expert but i have fixed a few plasmas. You have a panel sticker on back of the actual panel itself that will tell you what voltages are supposed to be. On power supply there is Va and VS adjustment pots, if your voltage readings with DMM does not match panel sticker you will need to adjust very carefully till you get what sticker says. DON'T TOUCH Anything with you hands and be very precise where you stick screwdriver keep hand on insulated handle very high voltages. If unsure please ask before taking steps. Others on here are far more knowledgable and will help with good photos and perhaps find service manual for this set.

[freakaftr8]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Capacitors on the y sustain board. I delt with this before. This is how Pioneer manifests itself when ysus vsus voltage cannot be obtained properly. I don't remember which capacitor I changed but I believe it was it 470 or 330 microfarad near the top of the ysus board

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Should be able to preheat those caps freakaftr8 speaking of with hairdryer to speed up startup/warming process to narrow down suspect cap, no need to get it hot just warm unless it bulging then it is replace on sight otherwise esr meter is needed.....

[freakaftr8]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Should be able to preheat those caps freakaftr8 speaking of with hairdryer to speed up startup/warming process to narrow down suspect cap, no need to get it hot just warm unless it bulging then it is replace on sight otherwise esr meter is needed.....

Precisely. That's what I did and found the picture came right back so I knew immediately what was going on. I was also monitoring VADR or whatever the address buffer voltage is. Because inevitably this is what it's affecting believe it or not

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Thanks guys! I will open up the back of the panel tomorrow and take some pictures and post them. Is the Ysus board easily identifiable? I am hoping the cap is bulged so I don't have to go through any testing.

I really appreciate both of you helping me out.

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Ysus will be on left side of set when you're looking at it from back. it will be attached to buffer board er boards in turn is attached to flex ribbon going to panel.

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

I opened her up. Here are some pictures looking from the back.

1. First picture is the Ysus I think (left side). One of the caps has maybe a slight little bump? Hard to tell.
2. 2nd Picture of cap on the Ysus that might be buldging? Big brown one.
3. 3rd picture is the Vsus (right side)?
4. 4th picture is the full back pic.
5. 5th pic is main board and power supply?
6. Not sure what these are but looked brown. Probably ok tho.

Nothing seems to be obvious.

Let me know if you need a different type of picture.

Thanks!
Boyd

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Future reference we like straight shot pics, But i was able to see area we need to pay attention to. Ok on ysus there is a big cap 280v 300uf on the upper portion of ysus. Warm each cap from one mentioned and all others above it, 1 at a time and see if tv fires right up. if all fails warm the entire group remember not hot but warm.

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Do i have the tv on as i warm with dryer or turn tv after i warm with dryer?

Also, the tv isnt hooked up to cable. Do i have to hook the tv to cable to do this test?

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

heat with set off, after heat, turn on set does it speed up picture warming? no ok turn set off try heating another cap turn on set does it speed up? no ok turn off try another etc. it would be best to use the last input u used on this for best results.








Safety precautions, if asked to disconnect or reconnect anything on plasma internally etc, always have set off and disconnected from all power sources and 30 second drain time before you do anything.

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Ok ill try it. Ill keep u posted

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

if you can mount stand back on set without back on do so if you still have factory stand it would make it so much easier so you can see display rather than constant lifting the heavy sucker.

[Boyd1966]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

Unfortunately I gave the stand away since I was never using it BUT I have it propped on a chair upside down.

How long do I keep the hair dryer on the cap? I warmed the cap but screen still dark. And can I warm the cap while the TV is on? That would be faster.

[heavymachines]

Re: Pioneer Plasma Pro 1120HD fixable or Not? 2 pictures shown

i've never warmed cap while in operation. so i cannot recommend to do so.




Heat them up till it is warm to the touch on sides of caps heat from top.