Pioneer Elit 1120HD Power Supply issue?

**freakaftr8** · 01-22-2018, 01:50 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Yes c2304. Sorry.

**Boyd1966** · 01-22-2018, 02:07 PM

Re: Pioneer Elit 1120HD Power Supply issue?

I heated up c2304 and nothing changed. Still turns off to 3 blinking red lights. One thing I didn't mention is on this board (pictured top left corner) is a constant red light when the front panel is blinking 3 times. The blue circle, a green light comes on right before the 3 red light sequence comes on.

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**freakaftr8** · 01-22-2018, 02:17 PM

Re: Pioneer Elit 1120HD Power Supply issue?

That's the control board and the red light indicates an error.

Might need to get a Volt meter and check over the VSUS voltages. Power supply is definitely shutting down to over voltage under voltage over current under current. Something like that however it looks like you're VSUS is significantly low Considering the picture you have before the shutdown. Now something shorted on one of the boards could be dragging this voltage down sending it into protection mode

**Boyd1966** · 01-22-2018, 02:26 PM

Re: Pioneer Elit 1120HD Power Supply issue?

What kind of voltmeter should I get? I am going to Home depot now.

**freakaftr8** · 01-22-2018, 02:39 PM

Re: Pioneer Elit 1120HD Power Supply issue?

One that has a digital display and can read A.c. and DC up to 400v

**Boyd1966** · 01-22-2018, 03:13 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Like this one?

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**freakaftr8** · 01-22-2018, 03:20 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Yes that will work

**tom66** · 01-22-2018, 03:20 PM

Re: Pioneer Elit 1120HD Power Supply issue?

That is fine, make sure it's got the probes with it (should do)

**Boyd1966** · 01-22-2018, 03:37 PM

Re: Pioneer Elit 1120HD Power Supply issue?

It does.

**freakaftr8** · 01-22-2018, 03:45 PM

Re: Pioneer Elit 1120HD Power Supply issue?

The 3 red blinking light pattern indicates a short on the X, Y or scan ICs which are considered the buffer board. ( Let's hope it is not the buffer board as I don't believe those are replaceable on that model. Maybe Tom66 knows.

**tom66** · 01-22-2018, 03:46 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Unfortunately I can't find a service manual for this model. However, it is likely the same for other models.
Since you have 3 blinks and a lit panel it is not likely to be VSUS-SUSOUT short, etc.
It is more likely to be VH or VMSK fault, or Scan IC fault.

On some Pioneer plasmas the buffer "boards" (Scan IC) are part of the panel ribbons. They are quite reliable, and I would not expect them to fail, especially because Pioneer use 48- and 64-bit ICs (lower power density) when most manufacturers were using 90-bit ones at the time. However, it is conceivable that there is a fault on them. In which case the best you could do is to try and remove and replace the IC on the ribbon, the ribbon not being directly replaceable. It depends on which model of TV you have, I know the PDP-LX5090 and similar 9th generation Pioneer sets used this system which would mean scan IC death would be effectively fatal. Your set is older however so it is another matter.

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**Boyd1966** · 01-22-2018, 06:38 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Ok guys.... much appreciated the feedbback....BUT what should my next move be? I need step by step instructions....as you know by now, I am learning as we go. If I have good direction, I can accomplish anything you say....ultimately I just want to know if this plasma is toast or not. ....so since this is older (one of the first pioneer elite plasmas's) what information do you need to know so I can go and diagnose?

I do know the ribbons connected to all of the boards seem to be replaceable from what i can see. If you can tell me to take a picture of positions of the boards, we will know for sure. Right?

P.S. The TV started to screw up when I was streaming Netflix and it just hung there for a few minutes like it was clunking away and processing .i.e. working hard....then it just shut off. Thats when I tried to turn it back on and ...you know the rest.... 3 blinking red lights.

See picture. I added a full view of the plasma. The exterior power and display connections are on top, the tv is upside down. I thought this might help you see the ribbons connected to the boards.

Scan ICs are on the right? The square chips? Can I use my new voltmeter?

We can do this!!!!! We can rebuild the TV. We have the technology. We can make the TV better than it was. Better, stronger, faster!!!!

Boyd

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**freakaftr8** · 01-22-2018, 09:02 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Could you take a good clear photo of the Y board. Try to get good lighting and eliminate the Flash on the camera if you can

**freakaftr8** · 01-23-2018, 12:53 AM

Re: Pioneer Elit 1120HD Power Supply issue?

P.S. The TV started to screw up when I was streaming Netflix and it just hung there for a few minutes like it was clunking away and processing .i.e. working hard....then it just shut off. Thats when I tried to turn it back on and ...you know the rest.... 3 blinking red lights.

When you saw this did the tv actually freeze up??

**tom66** · 01-23-2018, 12:07 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Not that I don't believe you...but...it would be really hard for the control board to fail in a way that led to the picture freezing and one which did damage to the hardware in the TV. The faults are probably unrelated.

**Boyd1966** · 01-23-2018, 01:03 PM

Re: Pioneer Elit 1120HD Power Supply issue?

Yes Netflix on the TV just froze, nothing would happen, then the TV just shut down. And then when I tried to turn the TV back on, the image in my first photo in this thread shows up for a split second and the then the TV shuts down to 3 red light mode.

Here are the pictures of the Y board. I hope they are clear enough otherwise I will need to put the TV on a table under an overhead light.

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**Boyd1966** · 01-23-2018, 01:10 PM

Re: Pioneer Elit 1120HD Power Supply issue?

These might be better pictures of the Y board.

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**freakaftr8** · 01-23-2018, 01:26 PM

Re: Pioneer Elit 1120HD Power Supply issue?

OK can you probe VSUS with DC voltage setting on your voltmeter set to 400vdc. Black probe to chassis ground And red probe to one of the pens that go into the Y board labeled the VSUS. Read what it says it's probably gonna be quick before it shuts down

**Boyd1966** · 01-23-2018, 01:30 PM

Re: Pioneer Elit 1120HD Power Supply issue?

I assume, I turn the TV on correct? If so, I won't be able to do it until my wife gets home so she can help me. It will shut down before I get the probes on. I should be able to do it around 6:30 EST.

**freakaftr8** · 01-23-2018, 01:32 PM

Re: Pioneer Elit 1120HD Power Supply issue?

OK for the time being can you disconnect the power going to the Y and the X board and then power up and see if the power supply stays on?

I believe it should on this model.

Before we did them individually but now are going to do them together

Pioneer Elit 1120HD Power Supply issue?

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