CurtPalme.com Home Theater Forum

[CasetheCorvetteman]

I have been playing around with the NEC 9PG today so i can figure out how far away i need to mount it, i did a pretty crude setup, actually got it damn good with point convergence turned off, but when i turned the point setting to enable, it did nothing, pressing POINT on the remote just brings up the signal name and time/date.



I figured some smart arse had stolen the bloody board, so i powered the rig off, unplugged it, waited 10 minutes or so and opened up the cage, the board is there, i pulled it out, looks perfect, pressed gently on the chips to be sure they are seated, and tried again with no sucsess.



I do have the wrong remote, the one i have is for the plus and mine is a plain, so the buttons are a bit different, but even going the long way through all the menus i cant find point adjustment at all. Its enabled, but it doesnt do anything.



What is the go when that happens? Does this mean the point board may be rooted? Should i pop out all the chips one by one and reseat them on that point board? Should i replace the caps on there?


Thanks in advance everyone

[kschmit2]

the board needs to be enabled in the menu.
Page 2 of the setting mode menu, enable point convergence.

to get there:

press ADJUST, enter passcode 2580, ENTER, use cursor to get to "9 / OPTION" hit ENTER, use cursor to go to "SETTING MODE", hit ENTER,
use cursor to scroll down to page 2 and select "POINT CONVERGENCE", hit ENTER, select ENABLE, hit ENTER .... now hit END, END and STORE, ENTER whatever it says on screen.

Kai

[Jesse S]

As a new user you should stay away from the point convergence. On PG it drifts like crazy because of where it sits in the signal chain.

Learn how the standard controls work and get the alignment and convergence as close as possible with just those.

Personally I would even take the point card out.

What will probably happen if you use it, is that you'll spend 2 hours pulling the lines around until it looks decent, then you'll fire it up a day or two later and it will all be out of whack again. Total waste of time.

Even on my XG i use it sparingly. On XG it operates in the same electrical area as the other controls so it is much more stable. Even so, you can get very close convergence without ever touching point.

[jask]

[CasetheCorvetteman]

[kschmit2]

I'm not sure if you really need to have a user passcode, but it is worth a try. Just remember not to use 2580 for the user pass as 2580 is reserved for access to service settings.

[jask]

lot of help we are eh? so I am assuming the board is not screwed and since it is being recognized as an option in the menu, and is enabled, the only other thing I can think of is to clean the contacts on the board edge or swap in a known good point board. I did have something similar happen once and pulled the board cleaned it and restarted the machine w/o the point so it would clear the menu option ... reinstalled and have not had any more problems.
I would lend you my point but it might be quick and cheaper to see if anyone down there has one you can test with.

[CasetheCorvetteman]

Thanks Jask, i appreciate your help mate

I do have a good mate close here that also has the same model 9PG, he is a member on this forum as well. Goes by the name of Aussie Al.

If im not able to get mine to work, i will have to test his board in mine, and my board in his, etc etc... We know his works, we have used it a couple times.

What extra settings does 2580 get you?

Also, if the board is not present in the machine, does that mean the menu option to enable and disable it will not be there? Cause as you say the fact it comes up in the menu may be a good sign. The board its self was abit warm when i pulled it out, which was about 10 minutes after shut down and power disconnect, it was not hot by any means, it was warm like youd expect any circuit board to be during operation.

Thanks again for you help!! I do have another question but i will start a new thread for that i think.

[kschmit2]

[CasetheCorvetteman]

No i wont be doing that!!

[CasetheCorvetteman]

Ive got an update on the 9PG point issue, it now seems to be more than just that.



I fired it up today, and the picture wasnt where i had it before, the projector hasnt been moved, but the pic had moved from the center of the screen. Then it started to jiggle side to side on occation, and at one stage it rolled off one side and most of the way back on the other.



I shut it down and checked all the boards, and when i fired it back up, it was doing the same thing, then the convergence when out by about an inch, even across the screen, as in no geometry change, just colour alignment, then the message "POINT COMMUNICATION ERROR" came up 3 times, screen went blank, then came up converged again.



Pressing POINT on the remote now brings up point sometimes, but it wont adjust, and randomly comes up with that message, before going blank, then coming back on to standard image.



It seems to work quite well at 800x600 and 1024x768, works also at 1280x768, but at 1280x960 or 1600x1200 it says on the screen its got it all, but its like as if the horizontal hold is out of whack, it has a massive amount of lines and the pic looks like its rolling flat out from bottom to top.



What is likely going to be the problem here?

[RayN999]

Case, on my 9pg, I replaced the 2SK4288A transistor on the deflection board with the NTE equivalent part which I was able to obtain locally. I noticed that you posted in another thread of mine in the buy/sell forum, but since it's not a buy/sell issue anymore, I'll respond here.

I had the exact same symptoms that started a couple months ago, and it quickly deteriorated to where I wasn't able to get anything higher than 800x600 to display at all. It started out with the same horizontal shaking & rolling, and got worse with a few more hours of power-on time. Finally when it shut down, the LED panel on back came up with an F3 error which indicates an issue with point convergence communication.

NTE2365 has almost exactly the same electrical specs as the 2SC4288A Toshiba transistor on the deflection board, including the high voltage capacity, so I figured it was a safe replacement to use. When I replaced it, I figured i didn't have much left to lose, so why not.... After the replacement, I fired up the projector and everything came up like it should, including the higher resolution capacities. And the horizontal 'shaking' had gone away completely.

I'll get a pic of the board & the part I replaced & I'll post it here shortly.

Ray

[Curt Palme]

I don't think that's the problem. Sounds like a bunch of your caps are bad on boards, very typical for the NEC PG sets. Could be on the deflection board, system, wave or point boards. Most likely a combination of all four.

[Curt Palme]

I don't think that's the problem. Sounds like a bunch of your caps are bad on boards, very typical for the NEC PG sets. Could be on the deflection board, system, wave or point boards. Most likely a combination of all four.

[CasetheCorvetteman]

Thanks everyone, i appreciate the help

Im in abit of a hurry at the moment, so ill put up a full reply later on

[Mark_A_W]

Umm....Doug experimented with replacing the deflection transistor with "better" new ones, and they all exploded after a few weeks.


I would NOT substitute that part.

[CasetheCorvetteman]

No worries, i trust your judgement on this subject Mark.

Thanks mate

[RayN999]

Thanks for the info. I've found a source for the original Toshiba part & will acquire a couple of these to install to bring this 9PG back to original specs.

Ray

[CasetheCorvetteman]

I have found a couple pics taken by MrGreen, and what he is seeing is what i am getting, so here they are:
http://www.curtpalme.com/forum/viewtopic.php?p=145558#145558

And the menus:
http://www.curtpalme.com/forum/viewtopic.php?p=146743#146743

That is what i see on my rig when i go to 1280x1024 or 1600x1200, 1280x768 seemed to work, 1024x768 seemed to work, and 800x600 worked better than anything else, but was still having the movements side to side, just not near as bad.

The difference here between mine and the pics ive referenced, mine is doing this when it clearly isnt under a load id consider too much for it, all settings are at 60Hz, and coming from a laptop. He apparently sees that when he tries to go 1920x1080p, but what you see in those pics is exactly what i see with mine at the above mensioned resolutions.

What do you reckon is going on here?

[CasetheCorvetteman]

I would also believe it if someone told me the pots that are not to be touched on the deflection board have been touched by the previous owner. That is not the whole cause of this issue though, cause it was working fine a couple days prior to this.