JVC RS440 / 540 / 640 projectors

[Holiday121]

Yikes thanks for the quick response!!

So what's the best way to sort of calibrate the hdr profile.

I'm using a 133 inch high power da lite screen

[Javs]

No.

Yes you do Mike.

The HDR Gamma can definitely be calibrated using Autocal since the X20 models.

[Dylan Seeger]

Yes you do Mike.

The HDR Gamma can definitely be calibrated using Autocal since the X20 models.

Thank God for Arves tool for the older models!

[Javs]

Thank God for Arves tool for the older models!

And the new!

I don't use built in HDR gamma at all.

[Holiday121]

Hmmmm javs so how would you recommend going about calibrating the hdr?

I am about to pick up a spyder 5 this week

[AVSMike]

Yes you do Mike.

The HDR Gamma can definitely be calibrated using Autocal since the X20 models.

My mistake. Chad calibrated my RS4500. I thought you used Autocal for 1080P and then used 4K test patterns to adjust for the HDR.

[Holiday121]

So just the test patterns for hdr? And autocal the other. Kemal 1080p settings?

[AVSMike]

Listen to Javs, he has used the program extensively. I have the spyder5, but I was afraid to use it on a 35K projector, due to questionable accuracy.

[AVSMike]

Listen to Javs, he has used the program extensively. I have the spyder5, but I was afraid to use it on a 35K projector, due to questionable accuracy. I sold my RS600 shortly after buying the meter, so never used it.

[Holiday121]

Jav.


When running the autocal on the hdr setting does it recognize that it's for 4k and the wide color? Mind giving me a hand please !!!

[Javs]

Jav.

When running the autocal on the hdr setting does it recognize that it's for 4k and the wide color? Mind giving me a hand please !!!

Yes, it knows the ST2084 gamma curve and that you are using bT2020 colour space, so long as they are selected.

No big trickery, just calibrate the same as you would and SDR picture mode.

The Gamma will show as a massive looking 'S' when its done and the BT2020 plot will look something like this:

JVC RS440 / 540 / 640 projectors

.

Your HDR colour profile will look like this if you chose to use that:

JVC RS440 / 540 / 640 projectors

I posted the Autocal workflow on AVS a couple days ago, so here it is again:

For GAMMA.

Filter, No filter, High Lamp, Low Lamp, ST.2084, CMD On/Off.

Those are all the modes which carry with them individual gamma calibrations which then apply to any and all combinations of the above.

If you dont use CMD. And you want your entire projector calibrated for a proper gamma baseline, because you want to be very thorough, then you need to calibrate for eg:

I select Gamma ONLY in the Autocal prefs before these steps.

Standard Colour Mode (Or any other factory default colour profile with NO Filter engaged) in Low Lamp and High Lamp. (You need to Select NORMAL Gamma for this). This will fix Gamma baseline for any and ALL picture/colour modes which do not use the filter.

Reference Colour Mode (Or any factory colour profile with Filter) / HDR Mode (X20/X40 Models) in Low Lamp and High lamp. (With the X20 and X40 models, you need to select the ST.2084 Gamma for this, if using the X00 model then NORMAL gamma needs to be selected). Again, this will correct baseline gamma for any and all modes using a colour profile that snaps the filter in place. If you have X20/X40 models, then you should calibrate the HDR mode on that projector with the ST.2084 gamma selected. The X00 models cannot calibrate Gamma D.

If you use CMD, then you need to do each of those again with CMD enabled.

Doing this will yield a baseline gamma correct calibration no matter which user mode of colour profile you use.

So for me, I calibrate Standard Mode Low/High lamp both ONLY iris 0 for Gamma. Then I do HDR Mode (Since I own X20/X40 model) High / Low.

Then since Gamma is done for the whole projector in all modes, I switch Autocal into Colour only mode.

FOR COLOR.

Then go to my User Preset for SDR and colour profile - User 1 / Rec709 colour profile / D6500 Colour temp. Then I calibrate Iris position 0 / 4 / 8 / 12 In both Low Lamp and High Lamp. Then SDR is completely done for the entire projector.

Repeat with my HDR prestet. BT2020 Colour Profile / ST2084 Gamma mode / HDR Colour Temp (X20/X40 Models). Calibrate Iris position 0 / 4 / 8 / 12 In both Low Lamp and High Lamp. Then HDR is completely done for the entire projector.

That is being completely thorough. If you want to save a BUNCH of time, just calibrate the iris positions you wish to use in whatever mode you use. But me, I hate when I go through the iris steps, I see colour temp changes, so I prefer to have the whole projector at least in the same ballpark and all drift will be close to equal in every mode.

Make sense?

[Holiday121]

I try to stay away from avs now unfortunately it's become somewhat toxic even though there are some amazing people there. Me and zombie use to chat before he even started reviewing projectors!!! Coderguy helped me some as wel!!

Thanks
For posting this I will read read and read again before I try to ask any questions

[AVSMike]

On the other forum, there has been a lot of talk about the new models being a step backwards.

The lamp, lens and basic light engine is the same between last year and this year. So brightness and contrast are unchanged. Anybody finding large differences have one or more of the following:

1.  Have a setting mismatched between the two.
2.  Have a measurement error, due to procedure or meter.
3.  Have a defective projector.
4.  Have a defective lamp.

I have checked with a trusted person that has compared brightness between a 620 and a 640. The 640 was brighter, but the 620 did have some hours on it, but not many.

[Cal68]

A big thank you to Mike Garrett for giving me a great deal on an RS640. I bought one from him today to replace an 8 year old JVC RS20 (yeah, remember them?!). His service and price cannot be beat. I look forward to setting it up and enjoying it after the Thanksgiving break is over. Thanks Mike!

Cal68

[Dylan Seeger]

I think there's some variance in quality between parts at all levels. Even the top of the line model will not all perform exactly the same. There will be some variability between those units too. With that said, I can understand that paying a premium for "top shelf" parts can be disappointing when you don't have perfection in everything, but I think it's misguided to assume every aspect of your projector will be perfect.

As you said though, if something truly isn't working or if you're dissatisfied, return or replace the projector. I don't see anywhere in JVC's literature that says every piece of the projector will be perfect, just a promise that you'll be getting hand selected components representing the top few percentage closest to specification. I remember a few years back they even specified what that percentage represented.

Javs unit was clearly defective and JVC agreed something wasn't right. In his case, the lens shouldn't have had as much focus nonuniformity and hopefully his replacement unit fares better.