G70 New or old ROM Vers. ? - AVS Forum
CRT Projectors > G70 New or old ROM Vers. ?
didaschi's Avatar didaschi 11:58 PM 10-25-2010
Hi,

I can buy a Sony G70. I asked for the ROM Vers. and the seller told me this:

H: 1.00 U1: 1.03 U2: 1.04 U3: 1.00

Is it the old version so that I can setup G2?

If I buy a G70 with latest ROM Vers. and I can`t setup G2 what do I have to do to make a good b/w balance? Is there a manual for b/w balance available?

best regards

didaschi

AFryia's Avatar AFryia 04:38 PM 10-26-2010
Quote:
Originally Posted by didaschi View Post

If I buy a G70 with latest ROM Vers. and I can`t setup G2 what do I have to do to make a good b/w balance? Is there a manual for b/w balance available?

You should be able to get good grayscale tracking without adjusting G2.

IMO the geometry is more stable with the newer firmware, I have both.

cinema mad's Avatar cinema mad 12:53 AM 10-27-2010
Hi AFryia,

Just wondering what Probe you where using in the GrayScale example above
as it looks pretty good, or is that with A VPs CMS..

Also how many hours are on your G70 tubes?..

Cheers...
barcoed's Avatar barcoed 06:48 AM 10-27-2010
Personally I would not use a G70 unless I could use the old firmware. I must turn off the Auto black thigy to remove those horrifically bright bowed lines at the top of the tube. Switch off auto black and adjust the G2 - job done and no lines.
If all I could get was a G70 with new firmware, then I'd sell it and buy a digital!
AFryia's Avatar AFryia 05:17 PM 10-27-2010
Quote:
Originally Posted by cinema mad View Post

Hi AFryia,

Just wondering what Probe you where using in the GrayScale example above
as it looks pretty good, or is that with A VPs CMS..

Also how many hours are on your G70 tubes?..

Cheers...

The probe is the HCFR Colormeter (DIY).

No processing or color management for that graph; just the HTPC direct to the PJ. The key is to keep the contrast down. This way your contrast ratio will be higher, gamma will be closer to 2.2-2.5. Down side is overall brightness is lower. Ideally you need a 100% light controlled room.

I run AGB=ON and have to look real hard to see the AGB line. The AGB line resides at the top of the 4:3 raster and I project wide screen only 16:9 etc. The only time I notice it is when I'm half way through a calibration and the contrast, grayscale and gamma are not set.

Tubes were ~2500-3000hrs. With the lower contrast the tubes are still 8&9s.
cinema mad's Avatar cinema mad 09:17 PM 10-28-2010
Thanks for your reply AFryia,

My G70 Contrast's @ 55 at this time but run a little 16x9 92" 1.3gain screen in a Bat cave..
I also run AGB on & rarely notice the line myself , and like my Gamma around 2.35..
I've read A couple good things posted about the HCFR DIY Probe..

Thanks again,
Jase...
AFryia's Avatar AFryia 04:10 PM 10-29-2010
Quote:
Originally Posted by cinema mad View Post

My G70 Contrast's @ 55 at this time but run a little 16x9 92" 1.3gain screen in a Bat cave.

The same here other than contrast @ 60-65

Quote:
Originally Posted by cinema mad View Post

I've read A couple good things posted about the HCFR DIY Probe..

IMO better than my SpiderII especially at low IRE. More acurate also.
Axatax's Avatar Axatax 08:57 PM 11-09-2010
FWIW,

My G70 started life with the new FW and I swapped in a new Y* board set with no ill effects.


Jeff
AFryia's Avatar AFryia 11:41 AM 11-13-2010
Quote:
Originally Posted by Axatax View Post

My G70 started life with the new FW and I swapped in a new Y* board set with no ill effects.

I don't know if it is necessary but I would (did) swap the three matching Y boards just to be safe.
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