Micromega T-drive 2 remote control

[vdeki]

Here are some pictures.Tell me you opinion what can be connected to my problem with remote control unit ?

[Mooly]

No easy answer I'm afraid.
With any fault finding once you have tried a few seemingly obvious things and got nowhere, then you have to start measuring.
So that menas checking the basics... that the supplies are clean and correct, and that the IR receiver is outputting clean "jitter free" data.

For all this you need an oscilloscope.

I see it's has had work done on it too, so that makes it harder. You don't know if it's a "real" or a "man made" fault.

[vdeki]

Hi Mooly

How can I lower the sensitivity of cd player because this skip problem is going to be occasional. The gain is normal 220-230v. This skipping problem is related with current. I tried to measure the gain and when I pulled out the test lead of digital multimeter it skipped.I tried this several times and always skipped. Is it possible to insert power protection system like APC?

[Mooly]

Originally Posted by vdeki

How can I lower the sensitivity of cd player because this skip problem is going to be occasional. The gain is normal 220-230v.

Line voltage should have no influence (unless it drops well below the tolerance in your location) as all the supplies are stabilised in the Micromega.
I think you can discount that.

Originally Posted by vdeki

This skipping problem is related with current. I tried to measure the gain and when I pulled out the test lead of digital multimeter it skipped.I tried this several times and always skipped. Is it possible to insert power protection system like APC?

Don't understand
"Related to current"... what current ?

What do you mean "measure the gain" The gain of what ? What are you measuring when you say it skips ?

[vdeki]

Simply, I pulled in and out the test lead of digital multimeter in electrical outlet and then skipped (tried this few times). So it has something to do this. Few post above I mentioned that skipping problem is also related with turning on/off the night lamp. They are o the same outlet. What about UPS? Will the sound be degraded?

[Mooly]

That sounds very strange to me. You are saying measuring the AC volts in a nearby socket causes the skipping.

Does it skip if you measure on another socket in another room. When the leads of the meter break contact you get a small arc... unbelievable if that is causing a problem. The arc can radiate a burst of RF energy... again I find it hard to imagine it causes skipping.

Have you tried the player on another socket in the house ?

So you need to prove it... a UPS is way over the top... I wouldn't entertain that idea. UPS vary in quality too... you need a pure sine wave output.
Easiest option is to make/fit/buy etc a filter. Perhaps a line to line and line to ground filter arrangement, with small choke and VDR as well. You can buy these things made up as "filter plugs" etc

What you are describing isn't a normal sort of occurence.

[vdeki]

I tried in another electrical outlet and nothing happens?!It doesn't skip. I'll try to plug the player in another socket. I didn't mentioned that I have power conditioner (600VA) on the same line.Maybe this is causing the problem? But as I know its here to filter the electrical noise!

What kind a filter are you talking about? Can you post some pictures?

[Mooly]

Why not try the player in another house ? It shouldn't be affected like you are saying.
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[vdeki]

Mooly,

As I see you have the very similar PCB board in your stage 2 cd player. Perhaps you have the eprom near the flat cable that comes from display board. And can you tell me what is purpose of that eprom, what is his function? Is it related with remote control functions?

[Mooly]

I don't what function the EEPROM will perform. May or may not be to do with remote... might be to store the TOC from the CD etc and user programming details.
The remote function is usually written into the main CPU on most equipment.