RC-1090 'unruly' IR reciever module

[geeza]

Hi

ex. When I try to pump the vol a little using remote, my RC-1090 won't respond or does with delay. Sometimes after while I release button on remote, my pre is rising the volume by itself in big amount. It seems to live its own independent life. This is not a remote unit problem, or doesn't seems to be. It looks funny but in fact could be quite dangerous!
Kindly stay in hope for help

[chanlon]

Do you have a plasma TV nearby?

[geeza]

No, I have LCD, but the problem occurs even if TV is switched off. By the way other devices responds fine for their commands.

[SkyDover]

This is strange because I have the same problem when I go to turn the volume up or down, it doesn't work sometimes but if I keep trying... the volume will keep going up on it's own and I have to jump up and quickly turn it down myself before it damages the speakers going too loud. I never used to have this problems so I started researching and trying to figure it out.

I discovered that it was my new LCD T.V. It puts out a frequency that blocks the Rotel remote intermittently. When I unplug the T.V. everything works fine with no problems, it's only when the LCD is plugged in. I contacted the manufacturer and they said it has to do with the backlight in the T.V. and a known issue and wasn't sure if it will be resolved. Very stange!

[bigburner]

This happened to me once with my RC-1082, or was it the wine? I'm pretty sure it wasn't the wine so this thread confirms that. I was out of my chair pretty quickly to get to the volume knob.

Nigel.

[geeza]

@SkyDover and chanlon - Thanx a lot for reliable suggestion! I realized the issue just came after I've replaced my LCD TVset from 42" with 52" one. It's true that pre responds IR commands fine when TV is switched off. I will do some observations regarding TV on/off dependency.

[geeza]

So, there's no doubt that LCD TV somehow blocks IR commands. I'm wondering which way LCD is jamming IR? Is it happening via AC power line? Or maybe the backlit is emitting a kind radiation that blocks infra-red signals in the air? If we could figure out the how LCD is jamming Rotel's remote maybe the solution should be found?
Thank you guys

[Kevin D]

Quite simple actually. The back light is emitting IR and flooding the receiver.

Depending on where the unit is located, pushing it back under a shelf above it, constructing a cardboard shield around the sensor, or varying amounts of clear tape over the sensor might help.

The proper way to fix the issue is to cover up the sensor in the front and get a LCD proof external IR receiver plugging into the remote input on the back.

Kevin D.

[mattburk]

It sounds like you need to sell your rc-1090.

[geeza]

It sounds like you need to sell your rc-1090.

...just after my dead body

[mattburk]

well you cant blame me for trying!

[geeza]

..why so serious? mattburk

In future I'd like to replace my LCD for LED technology. It would help I guess. But first of all I'll try to plug an external IR receiver onto RC-1090 and keep it away from LCD following Kevin's suggestion.

[geeza]

I've bought 36kHz ext. remote receiver ended with 3.5mm jack. It doesn't work. Probably connection are different.
The site is in polish, but there is connection drawing.

http://vamond.etpro.pl/product/Odbiornik-podczerwieni-36kHz-w-obudowie-%28odbiornik-pilota%29,ODB-IR

Guys, can you please confirm or not this wiring?

[Kevin D]

If that's all you purchased, you don't have enough stuff to make it work. The jack on the back is IR in, not an IR receiver port.

You need a connecting block and 5v power supply to run the receiver, and then run an 1/8" mono jack from the block to the IR input.

Technically you don't need a block. Get a 1/8" mono cable and figure out which wires are tip and sleeve. Cut the plug coming off the receiver you purchased and figure out which wire is Vcc (5v input), ground, and data (dane). Get a 5v power supply and figure out which wire is positive, and which is ground. Connect the three grounds together (PS ground, receiver ground, 1/8" sleeve). Connect PS 5v+ to Vcc on the receiver. Connect data to tip of 1/8" jack.

Kevin D.

[geeza]

Thank you Kevin. I thought that RC-1090 gives Vcc on REMOTE EXT input, but I was wrong . I've got new more convenient idea to resolve my problem. However any other components of my A/V equipment seems to be proof from lcd IR distortion, so maybe there are lcd/plasma proof (PCB mounting) IR receiver modules on market? If so, the best solution will be replacing existing one with lcd/plasma-proof directly inside RC-1090?