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Can someone guess my discrete power on from this hex or does anyone have a discrete power on for LG DVD recorder DR4810?
This thread has 7 replies. Displaying all posts.
Post 1 made on Monday July 5, 2004 at 19:09
GaryM1
Lurking Member
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July 2004
6
Does anyone know where I can find a discrete power on code for a LG DR4810 dvd recorder.

many thanks

This message was edited by GaryM1 on 07/06/04 12:00.
Post 2 made on Monday July 5, 2004 at 23:17
jarmstrong
Founding Member
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March 2002
1,780
No, but if you post the Pronto hex for the power toggle command, one of us may be able to make an educated guess.
OP | Post 3 made on Tuesday July 6, 2004 at 11:54
GaryM1
Lurking Member
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July 2004
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ok, thanks - here's the power toggle in hex - any educated guesses would be greatly appreciated:

0000 006d 0025 0000 00ab 00aa 0015 0040 0015 0016 0015 0040 0015 0040 0015 0015 0015 0040 0015 0016 0015 0015 0015 0040 0015 0016 0015 0040 0015 0040 0015 0015 0015 0040 0015 0016 0015 0015 0015 0016 0015 0015 0015 0016 0015 0015 0015 0040 0015 0040 0015 0016 0015 0015 0015 0040 0015 0040 0015 0040 0015 0040 0015 0016 0015 0015 0015 0040 0015 0040 0015 06a0 00ab 00aa 0015 0016 0015 00aa

This message was edited by GaryM1 on 07/06/04 12:07.
Post 4 made on Tuesday July 6, 2004 at 14:55
johnsfine
IR Expert
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September 2002
5,159
I don't think that DVD has a command specifically for discrete on.

Have you tried all the ordinay commands while the unit is off? (in some DVDs eject, play, etc. also act as power on).

There are at least 3 CCF files for LG DVDs, one for a Zenith and one for a Goldstar, all of which have that same command set and none of which have discrete on or off functions.

There are also three upgrades posted for this in the JP1 group's DVD folder, and none of them list discrete on or off.

And Rob listed "advanced codes" for it here [Link: hifi-remote.com] also without discrete on or off.

Of course all those sources might be wrong. Maybe no one ever tried searching all 256 possible commands. Before deciding whether to try something like that you should find and read a few of the warnings about rare but serious damage done to some devices by testing random IR commands.

If you want to try it, Jon or I can make sure there's a correct IRP file for NECx1 protocol, then you can use the MakeHex program to generate all 256 commands of device 45.45.


This message was edited by johnsfine on 07/06/04 15:00.
OP | Post 5 made on Tuesday July 6, 2004 at 15:55
GaryM1
Lurking Member
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Johnsfine: thanks for your help so far.

I have read up on the dangers of trying random IR codes, and personally in my situation i think it's worth the risk.

Why? well, no other button on the remote will bring the machine out of standby, only the power button. Now normally I would just leave the unit on permanently, but the stupid thing automatically switches itself off after recording on timer.

As the player is in a cupboard and controlled by IR pyramids, i never know if it is on or off without opening the cupboard door!

it's infuriating.

Could you please give me layman step-by-step instructions on how to try 'the 256 combinations' you refer to.

p.s I also emailed LG customer services - they said "we can't give out hex codes as they could invalidate the warranty"

thanks

Gary
Post 6 made on Tuesday July 6, 2004 at 16:11
johnsfine
IR Expert
Joined:
Posts:
September 2002
5,159
I just fixed the NECx1.irp in the .zip file of makehex (Jon found an error in it a while back and I had fixed my local copy and forgot to update the .zip)

To create all 256 codes, you should start by downloading MakeHex from
[Link: john.fine.home.comcast.net]
and unzip it to some directory.

Next use a text editor (such as Notepad) to open NECx1.irp and change the device number to 45 and save.

Next drag the icon for necx1.irp onto the icon for Makehex.exe, which will create a file necx1.hex containing all 256 pronto hex samples.

Then you probably want the IRpanels program, which is available (misnamed CCF panels) here
[Link: remotecentral.com]

Open the necx1.hex file in a text editor and select all and copy. Then open IRpanels and paste. That will create a CCF containing the 256 commands.

Then merge that CCF into a CCF containing enough of your system to support testing operations, and test.

You may also want to use the DecodeCCF program and DecodeIR.dll from the JP1 group to decode one of the CCF files for your DVD. That will tell you the number of each known command so you can skip them in testing rather than rediscover known functions.

I temporarily posted copies of those in my comcast account to make it easier for non JP1 access, but they probably won't be there long term. Both are updated frequently and I'd rather update fewer places:
[Link: home.comcast.net]
[Link: home.comcast.net]


This message was edited by johnsfine on 07/06/04 16:25.
OP | Post 7 made on Tuesday July 6, 2004 at 19:35
GaryM1
Lurking Member
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July 2004
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Johnsfine: thanks for all that. it worked in the sense that i could try all 256 codes, and I can confirm that no discrete on/off codes exist.

it was also a pretty scary experience, a few wierd screens came up, some of them you could edit values on too. I don't think i have buggered anything up, but time will tell.

thanks for your help - i can't believe manufacturers make these things without discrete codes, for the record i think it sucks.
Post 8 made on Tuesday July 6, 2004 at 20:04
johnsfine
IR Expert
Joined:
Posts:
September 2002
5,159
On 07/06/04 19:35, GaryM1 said...
it worked in the
sense that i could try all 256 codes,

I expected some of those steps would need further explanation, so I'm impressed to hear results rather than more questions at this point.

it was also a pretty scary experience, a few wierd
screens came up, some of them you could edit values
on too. I don't think i have buggered anything
up, but time will tell.

I hope you kept track of which command numbers did strange things. That would be a nice thing to post here to help anyone else who wants to experiment.


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