CurtPalme.com Home Theater Forum

robnec · Joined: 27 Apr 2006 Posts: 87 Location: NYC

Hello. I have some spare time lately and wanted to fine tune my Nec pg 6+. Could somebody direct me how to do it and at what resolution. Thanks in advance. Brgds, Robert.

robnec · Joined: 27 Apr 2006 Posts: 87 Location: NYC

Hello. I wanted to thank Doug for his assistance when I tried to "improve' my PG 6+ set up. I will only attempt it again when I can really have nothing else on my mind. My advice to all when it is working at 90% do not look for the next 5 or 10. Leave it alone and enjoy movies. Thank you again. Brgds, Robert.

paw · Joined: 08 Mar 2006 Posts: 1176 Location: Arvada, CO

Darn! I was hoping to get detailed instructions on this procedure.

robnec · Joined: 27 Apr 2006 Posts: 87 Location: NYC

Hello. I will PM to you all info sent by Doug. Robert.

kschmit2 · Posted: Fri Feb 22, 2008 8:36 am Post subject:

Robert, can you PM me too, please?
Kai Smile

**AnalogRocks** · Posted: Fri Feb 22, 2008 5:29 pm Post subject:

Why not post it here? With Doug's permission of course.

robnec · Joined: 27 Apr 2006 Posts: 87 Location: NYC

Hello. I think that Doug will not be against it. If he does not post it I wiil copy all my PMs with him. Again do not do anything if the thing is working well. Brgds, Robert.

Tinman · Posted: Sat Feb 23, 2008 2:05 am Post subject:

The procedure for adjusting the H-Amplitude voltage has been posted many times. I'm almost surprised no one remembers it.

I guess it should be added to the NEC faq, since it is important. And yet, people turn that pot anyway to get more image size and then wonder why the HOT blows.

But I'll let Doug decide on this.

Marc

kschmit2 · Posted: Sat Feb 23, 2008 9:05 am Post subject:

Marc:
I have the detailed procedure for the XG series (incl. the exact pins to take measurements off), but can't find the procedure for the PGs. And whenever someone asked for the procedure in the past year or so they were given XG series instructions - i.e. unless I have missed some posts Smile

Kai

Btw, my PG+ runs so cool that I can hardly understand why that is so. Exhaust air is barely above ambient temperature even after hours of use (1080i96, 59.7 kHz)

Heh, 500 Posts Mr. Green

**AnalogRocks** · Posted: Sat Feb 23, 2008 2:57 pm Post subject:

Tinman · Posted: Sat Feb 23, 2008 4:23 pm Post subject:

kschmit2 · Posted: Sat Feb 23, 2008 4:33 pm Post subject:

Marc,

I made sure it would run that cold. It is ceiling mounted using a Sony PSS-10 (NEC ceiling mount attached to the PSS-10).
That way there's 14" of clearance above the PJ, and hot air won't build up there.

Kai

dbaisey · Posted: Sat Feb 23, 2008 4:58 pm Post subject:

Rob,
Its been posted so many times but go ahead and post it. Its just the H OUT and H WIDTH pot adjustment, same as listed in the service manual in the deflection board set up. Only thing that needs to be noted is it needs the correct input freq and be on the right pot. Doug

kschmit2 · Posted: Sat Feb 23, 2008 6:21 pm Post subject:

yeah, it needs a 15.75 kHz signal though RGBHV, Component or S-Video (the last 2 require the V4-Dec PWB).

deronmoped · Joined: 03 Nov 2006 Posts: 1154 Location: San Diego

It's 1.8 volts at pin 2 (plus lead to pin 2 and negative to ground) with a composite/S-video signal, with amplitude set to 100%. You adjust the H-width pot.

I'm running maximum (corner of image close to the edge) image width and have a voltage at pin 2 of 1.58. I did this by pulling the yokes back till the image started to hit the edge of the tube and then pushed the yoke forward a little. The only big problem I had with this is the lenses made it a real bitch to get proper convergence. It seems that the lenses do not hold a real tight tolerance out towards the edges. I messed with swapping and rotating (I removed and turned the whole lens on the tube and screwed it back down) the lenses till I had correct convergence at the edges.

Deron.

briands · Joined: 01 Aug 2006 Posts: 5

Guys,

Been working with parts from Doug to get my PG6 Xtra running again and I think the HOT has bitten the bullet again. Several years ago I replaced it... don't recall where I got it, but I'm pretty sure I got 2 at the same time (I'll dig up the other one or have to find one). At that time, some one helped me determine that it was in fact dead using a multimeter with the HOT still on the def board. Can anyone comment on what the impedance readings should be between the three legs on a good and a bad one?

Thanks!

briands · Joined: 01 Aug 2006 Posts: 5

Anyone?

lostmandan · Posted: Wed Sep 03, 2008 1:33 am Post subject:

If the device has failed, I suspect you will see a short circuit between at least one pair of pins (probably C-E), but my preferred method is to remove the suspect device from the PCB and compare to a known-good device.

I am not familar with the circuit, but sometimes other parts in the circuit may be faulty too. I will defer to the experts on that though.

briands · Joined: 01 Aug 2006 Posts: 5

Thanks... I'll go ahead and pull it out...

I found the ones I got earlier and they seem to be the wrong part number.

Anyone know where to get a replacement?

jaredjaric · Joined: 05 Jun 2007 Posts: 228 Location: Philippines