I am in need of some help. I installed my brand new green tube for my LC XG last night I turn the unit on and it was looking great. I shut down the XG and now it won’t power back up. The indicator display shows 00 the standby light is on. However when I hit the power button it attempts to turn on but then shuts down. :confused:

Someone please help!!

<speculation>
Short in the new tube dragging down one of the power supplies? Try unplugging the green neckboard and see if it powers up.
</speculation>

Across the continent and you get identical suggestions. Love it..:)

As I mentioned on the phone, I'll suggest that the problem is likely not tube related, but something got jarred/disconnected when you installed the tube. Since the set isn't coming up with an error code, I'm guessing you have an open circuit rather than an overload that the NEC will usually sense.

Check all of the wiring connectors, I've scraped the insulation off the wiring harness at the deflection board hinge point and sheared a thin wire off once.

Do as we suggested and disconnect the CRT sockets just in case the tube has an intermittent issue in it. (it's apparently a new tube, not a rebuild, and new tubes don't typically have issues)

Ok gentlemen,

I reseeded al of the neck board but no luck I hear the initial click but it won’t power up.
I then disconnected jus the green tube from the neck board the same thing.
This morning it power up for a few minutes I was able to pop up a cross hair from the internal pattern tube was looking great.
Any other suggestions will be appreciated

Thanks

00 happens to me when you cross wires going to the middle 4 boards, there are 2 sets of connectors that are identical and can be switched for each other, if these are wrong you will get 00 and instant shutdown, I forget which 2 it is

all other connectors on these 4 boards can't be switched up due to the size and etc., only 2 sets can

-Gary

Thanks Gary,

I think 00 is always displayed under normal operation.
But I am not sure.
I switch out the power supply it did not make a difference.
I am thinking of removing the green tube completely to see if it powers up.

Ok I removed the tube and went back step by step and reinstall the tube.
I then turn the pj on and it turn on I notice the error code was flashing Fb.

I then shut the pj down and Fb kept flashing. I tried to turn on the pj again and all I am getting is a click again and the code clear to 00.

You are sure it's Fb and not Fd??
Fb is a "nasty" error code that generally relates to something failing on the HV PWB. I have a box of these boards with that failure.
Fd is an HV error protection code which "might" be a bit easier to sort out.

BTW, whay did you mount your CPC magnets so close to your neck boards?? IMO that is to far back on the neck.

Terry

Terry, Sweetchuck here in Queensland figured out (another) transistor problem which causes that. The transistor tests ok in circuit, but it's not.

I'll pass it along if you like.

Those CPC magnets look fine to me (in the bare tube G70 thread).

You put them further forwards Terry? I thought they were supposed to line up over the "metal tube" portion of the electron gun?

That's where they are from the factory...

Something I have noticed , is if you have the remote hardwired into the unit and enter service mode , then go back to user mode , turn the projector off .
When you go to turn it on again Its in user mode and the remote port don't work the PJ just clicks , very odd.

So pull the remote lead out and use the IR remote and get it out of user mode.
:)

You are sure it's Fb and not Fd??
Fb is a "nasty" error code that generally relates to something failing on the HV PWB. I have a box of these boards with that failure.
Fd is an HV error protection code which "might" be a bit easier to sort out.

BTW, whay did you mount your CPC magnets so close to your neck boards?? IMO that is to far back on the neck.

Terry


Send me the box and I can fix them , no sweat . :D

Terry, Sweetchuck here in Queensland figured out (another) transistor problem which causes that. The transistor tests ok in circuit, but it's not.

I'll pass it along if you like.

That's exactly what I suspected and after spending time testing the transistors, I figured I would take the brute force approach and change all the likely suspects (transistors) if and when I need the boards.

Terry

Terry- PM sent...:)

DVD Man- swap out the LVPS from the other set, it's sounding more and more like something is intermittent in it.

Thank you all for your help and suggestions. As per Terry's advice I replaced the PWB board from my spare xg-852 the same results. I then decided to put in the original PWB board back and the unit power right up looking great kept it on for about an hour shut down turn back on no problem. I then decided to connect an input into line A of the projector as soon as the BNC connection of the cable made contact with the input BNC connection of the projector the unit shut down and now I am back to square one.

WOW

Terry- PM sent...:)

DVD Man- swap out the LVPS from the other set, it's sounding more and more like something is intermittent in it.

Thanks Curt, got it.

I agree, since the HV PWB wasn't it, try the PS.
I once had an NEC PS that would run for days on the bench but was very intermittent when we ceiling mounted the PJ. That was a strange one. Nothing loose in it or obviously wrong.

I also get back to what Curt originally said about something being knocked or pulled loose when you installed the tube. Especially if the unit ran fine before AND since the tube is an new OEM tube.

Ah so DVD man is calling you as well Curt........Doug you're next......lol

Terry

Thank You Guys

Where is the location of the LVPS ?

http://www.curtpalme.com/NECXG_Layout6.shtm

I would be careful with the new tube. If your having shut down problems it might be a good idea to put the old one back in until its resolved.

What is the error Fb (FB) or Fd (FD) look close. Still not clear on that. Doug

I'm wondering. Does anyone actually read the content of my website? :rolleyes:

:D :p

The LVPS was the first part I changed out.

I then decided to connect an input into line A of the projector as soon as the BNC connection of the cable made contact with the input BNC connection of the projector the unit shut down and now I am back to square one.


This bothers me. Do you have a voltmeter? Doug

I do not.

Does line-A main input card connect like the others? Is it possible that the main card is not seeded all the way

Input A is the motherboard, it doesnt seat but the connections do.

When you have this type of problem you need to go back and restore the state it was in when working normal then work your way out from there. Id suggest putting your old tube back in going over ALL the connections that could have been pulled or disturbed.

When swapping parts they need to match. Power supply needs to have the same ending number U or A depending on RPS. HV needs to have the same pre ink stamp number. This can be a can or worms.

From what I can tell you have a FB error but you need to look for a dual error like FB then FD.
Sometimes the HV board can give a FB followed by FD.
If you have a connector in the wrong place or unseated / cut wire you can also have this error. This can have many reasons and would be hard to 'see' what has been done so far.

Take each connection and check it for being seated and in the right place at both ends but I would try and find it with the old tube back in just incase. If the spare chassis is working and has the same part numbers check the LVPS in it as well as the HV board.

If you still cant find it you should have it sent in to repair. Doug

Doug, it's 3 AM, why are we up??? ;)

I agree, this is very strange. What really should be done here is to see if there's a voltage potential between the ground of the BNC connectors and the projector chassis. did the set shut down as soon as you touched the BNC cable to the projector, or only when you actually connected it?

Curt,
I have no idea other then my brain wanted a cup of coffee. :D Doug

He doesnt have a meter. In a PM he told me when he touched it to the connector.

Hello all,

I want to start this post reply by first thanking Curt, Terry, and Doug for there help and suggestions on removing and installing the tube to my XG110LC. Thank you gentlemen very much. The end result with the continuous shut down of the XG was a few loose boards that are connected to the mother board, after I reseated al the board back to the mother board all shut down issues and error codes have stopped.

Just after a few days of setting up the XG the results have been great. I have attached a few pictures. of my set up. WOW I am happy to be back from dlp.

More Pics

Few more pics