Viewsonic TV N4050W - protocol needed

[ylaviolette]

Can you help identify the correct protocol for this remote?

Tried the identified protocol (Emerson 10) without success, looks like default protocol not the correct one.

IR learned signals at:

http://www.hifi-remote.com/forums/dload ... le_id=6321


1. Device: Viewsonic N4050W
2. Type of device: TV
3. Year: ? 2004 ?
4. JP1/UEI Remote model: OFA9910
5. Do you have a JP1 cable? Yes
6. Still have original remote? Yes
7. Checked the file section? Yes
8. Checked Pronto file section (at R/C)? Yes
9. Partially working setup code? Learned IR file above

[vickyg2003]

ylaviolette, Some Viewsonic TV's do use the Emerson Combo Protocol, so this is probably a correct decode.

I don't see upgrades in your IR file that use the 00 65 Emerson Protocol.

I think we need to see that to figure out why your upgrade isn't working.

[The Robman]

The only difference that I see between those learns and the Emerson protocol is the frequency (Emerson is 36.7 and these are 37.7). Normally a difference that small shouldn't be a problem, but just in case that is the cause, here's a protocol upgrade that runs at 37.7

Upgrade protocol 0 = 00 65 (S3C8+) PB v4.01
43 8D 31 8B 12 D5 45 06 06 01 B3 01 9F 01 B3 05
05 CC 6A 06 CC 06 B8 E4 06 01 56 01 03 8D 01 46
End

So, create your upgrade in the normal way (using RM or KM) and copy it to IR.exe, then copy the protocol above over to IR also.

[ylaviolette]

Thanks to you both; It finally worked using the "Emerson Combo (4 devices)" the two other Emerson protocols (3 devices and single device) didn't work; I didn't have to use the protocol upgrade you provided Robman, however I noticed that the "Emerson Combo (4 devices)" already has a protocol upgrade of it's own which the 3 devices and single device doesn't have; for my knowledge, what is the technical difference between these 3 protocols and could I have figured out myself which one is the correct one except by trial and error? Was there something in my learned codes that was pointing towards the 4-devices combo?

Thx again, will post my new upgrades once I'm finished with my 15 devices... almost done.

[mr_d_p_gumby]

...for my knowledge, what is the technical difference between these 3 protocols and could I have figured out myself which one is the correct one except by trial and error?

The Emerson Combo (4 devices) executor (PID 0065:2) has the ability to change the IR carrier frequency, whereas the other Emerson executors do not. As Rob mentioned, devices are not usually critical about the carrier frequency, but perhaps yours is. The combo executor can transmit at either 36.7 kHz or 38.1 kHz, depending on bit 1 of the first fixed byte.

[The Robman]

Thanks to you both; It finally worked using the "Emerson Combo (4 devices)"

What device code did you enter and did you use RM or KM?

I've just done a disassembly of the new Emerson executor here:
http://www.hifi-remote.com/forums/dload ... le_id=6323

It appears to take the 2 right bits from each variable byte to decide which fixed byte to use as the device code.

It also appears to take the 2 right bits from the selected fixed byte to decide which changes to make, as follows:

00 = leave it "as is" (ie, freq = 36.7 and the format is dev, cmd, dev-comp, cmd-comp)
1x = change freq to 38.1 and leadout time to 100460 uS
x1 = 3rd byte is an XOR with $E4 instead of being a complement

As far as I can tell, both KM and RM prevent you from entering device codes greater than 63, so I don't see how you could have made those 2 bits anything other than 00.

[ylaviolette]

I forgot to subscribe on this one, so here's a late post:

I used RM and device code 10.

Let me know if you want me to run further tests but on my end everything is fine for this one.