CurtPalme.com Home Theater Forum

[skyraker]

Hi,

i´m from germany and bought a G70 with new tubes (350 hours). First it runs fine.

After mounting (ceiling front) i tried to do the first settings.

What i´ve done:

-Input A no signal
- Size, Lin, Skew, Bow.... set to the middle (128)
- at this point i wanted to adjust the optical focus cause i wanna know how to move the crt on the ceiling (left/right)
- contrast setting to 70 (20 when i bought it)
- red looks ok, blue and green "smears" (sorry, don´t know another word for it). Focussing with the optical focus failed.
- a look at the dot-pattern -> comets on blue and green. That should be the MG Focus and Astig (AQP/DQP)
- but green seems to be really bright. So i set the bias and gains adjustments to the middle first.
Adjustments before: BIAS R45 B54 B13 GAIN: R203 G226 B max
- back to the mg focus -> red and blue off -> starting to adjust the green
- wow, what´s that? The green tube runs hard. Very bright with horizontally lines. It seems like a too high G2 Voltage
- the crt automatically sets to "off"
- starting again -> "off" -> ERROR CODE 39
- starting -> enter the menue -> green tube set to "off" -> it works (short) -> the green tube lights up wether it was set to "off" -> crt automatically "off"
- starting -> red and blue lights up normally. No sign of the green tube. The tube doesn´t work. After some seconds the green tube runs -> crt off
- starting -> entering the menue -> set "ABG Mode" to "off". "Oh, all tubes are working fine". Some seconds later -> crt off
- factory reset by 10 seconds "reset" -> "ABG Mode" automatically sets to "on". Also the white "startup screen" has been activated.
- starting -> red, green and blue shortly lights up -> CRT off (again and again)


So, what to do?
I found just one thread about this error code 39. They told him to reseat the neck board. It works. So i have done the same. But no change after reseating the neck board of the green tube.


Any ideas what to do?

Greets
Thomas

Sorry for my bad english.

[skyraker]

Mhhh, nobody knows what´s the source of this error?
There´s nothing to find about "error code 39".

Any ideas?

Thanks
Thomas

[Curt Palme]

You want a response in 15 minutes? C'mon, it's Sunday and some of us have a life.

I will respond... tonight.

[Curt Palme]

You want a response in 15 minutes? C'mon, it's Sunday and some of us have a life.

I will respond... tonight.

[skyraker]

Sorry Curt, i don´t want to jostle (mhh, is it the right word?).
Also i forgot the "time shift" between europe and canada.

I´m sorry

Thomas

[macgyver655]

Code 39 is an IK error. IK means that one of the 3 tubes is exceeding the normal running parameters. This is probably caused by your green abnormality. Solve the green problem and the code 39 will go away. The error code does not tell you whats wrong, just where to look.

[Curt Palme]

NO worries.

You have a bad neck board (CRT socket) or possibly a bad tube.

Pull each CRT socket off the back of each tube one at a time, and see if the error goes away and if the other two tubes power up. If not, then disconnect each CRT socket completely rather than just pulling it off the back of the tube and try it again.

[Curt Palme]

NO worries.

You have a bad neck board (CRT socket) or possibly a bad tube.

Pull each CRT socket off the back of each tube one at a time, and see if the error goes away and if the other two tubes power up. If not, then disconnect each CRT socket completely rather than just pulling it off the back of the tube and try it again.

[skyraker]

Thanks for your answers.

I pulled off and on each CRT socket of the back of the tubes. Still the same error. CRT just runs for 2 seconds with short running on all tubes (rgb).
Today i will try to disconnect them completely. But i have to reinstall the CRT from the ceiling at first.


Thomas

[skyraker]

Hi,

now i have disconnected each CRT socket completely with every of its plugs. I have done that with every CRT Socket. I also disconnected and connect all plugs which i could reach in this area.

Effect -> starting up the CRT -> all tubes light up shortly -> while this, the red light on the back of the IFB40 blinks up one time and the IFB40 makes a "click clack" (like a relais is closing and opening) -> CRT shuts down with error 39

But how to check out a bad neck board? If it´s damaged i´ll not be able to change it with the one of the red or blue tube. The CRT would give the same error cause the damaged one is pluged on the red.

Whatever, i´m very interessted in what to do next.

Thanks
Thomas

[Curt Palme]

Yes, but by removing each CRT socket, if one is defective, the other two should then light up the two tubes left. Take the bad one out of the circuit, and the remaining bit of the set should work again.

If the error is there regardless, then I'd say that the CRTs and sockets/neck boards are OK, and your problem is elsewhere.

Does it look like the tubes come on REALLY brightly before the set shuts off with the error code?

If so, then one voltage that drives the tubes is way off. This could be the RGB input board, one of the power supplies or the PA board, at least that's what I'm guessing.

At this point you'd either need to send boards for testing, or if you can find another G70 somewhere close, swap boards to fine out which one it is.

I can test and repair boards for you, and it's not too expensive to send them to me, as the biggest one is the PA board.

[Curt Palme]

Yes, but by removing each CRT socket, if one is defective, the other two should then light up the two tubes left. Take the bad one out of the circuit, and the remaining bit of the set should work again.

If the error is there regardless, then I'd say that the CRTs and sockets/neck boards are OK, and your problem is elsewhere.

Does it look like the tubes come on REALLY brightly before the set shuts off with the error code?

If so, then one voltage that drives the tubes is way off. This could be the RGB input board, one of the power supplies or the PA board, at least that's what I'm guessing.

At this point you'd either need to send boards for testing, or if you can find another G70 somewhere close, swap boards to fine out which one it is.

I can test and repair boards for you, and it's not too expensive to send them to me, as the biggest one is the PA board.

[macgyver655]

I may be misunderstanding the description here but it sounds like your not leaving a neckboard disconnected when turning the projector on to see if the error code goes away. Its sounds like your disconnecting and reconnecting then turning the projector on. Am I correct?

[skyraker]

Thank Curt,

i misunderstood your post.
Now i took out the CRT socket of the green tube and switched the power on.
Ok, the CRT works fine and the blue and red tube lights up.

Can i put the CRT socket of the red tube on the green one? Just to be sure, that the rest of the green circuit is ok? In this case the CRT has to power up with the blue and green tubes without an error.

Thanks
Thomas

[Curt Palme]

Yes, you can swap them, they are all identical.

Thanks Mac, I completely missed that...

[Curt Palme]

Yes, you can swap them, they are all identical.

Thanks Mac, I completely missed that...

[skyraker]

Yes Macgyver, you are right. I misunderstood Curts post.

But now i habe done it right and the CRT works.

Now i have to wait if i can put the red one on the green tube. Just to test whether the green tube works fine then.

[skyraker]

ok, i´ll test it right now.

Thank you.

[skyraker]

Hi,

now i put the CRT socket of the red tube on the green one. Error Code 38 again. So the CRT sockets seem to be ok.

What to do now to find the mistake?

Thanks
Thomas

[Curt Palme]

You may have a shorted tube. Did you put the green CRT socket on the red tube as well? Does that work?

[Curt Palme]

You may have a shorted tube. Did you put the green CRT socket on the red tube as well? Does that work?

[Esel]

Hi
curt, is it possible that the HV-cable has to be replaced or re-isolated on the Tube?
I've heard about it before.

Andreas

[Curt Palme]

Not usually, he'd hear a loud snapping noise as the HV fired up. I do have HV leads here though..

[Curt Palme]

Not usually, he'd hear a loud snapping noise as the HV fired up. I do have HV leads here though..

[skyraker]

So, i have tested the green CRT socket on the red tube. Everything works fine. The CRT sockets are fine.

There must be another problem on the green circuit.

When i start up the CRT with all three sockets all tubes light shortly. At that short moment the green tube is bright like the red one. Not darker or brighter. But it seems or it could be that she wants to get brighter. It eventually looks like she wants to get brighter and brake down at this moment. I don´t know how to explain it better. It could be like this, but i´m not sure.


Greets
Thomas

[skyraker]

Hi Curt,

i don´t know whether it´s important.
The green CRT socket is deinstalled. When i switch on the crt blue and red lights up at the same time. Some seconds later the red tube shuts down for one or two seconds. It shuts down for these one or two seconds everytime i start up the crt. After that it runs fine.


Thomas