Micromega T-drive 2 remote control - Page 3

Mooly · 26th February 2010, 06:28 PM

CDM12/4's have jumping and skipping included as standard

Easy fix, but requires careful dismantling and removal of the gears and rack and all old grease washing off with iso etc. Use card to get every last bit from out of the teeth and reassemble using just a thin smear of suitable plastics grease. Vaseline etc is way to heavy.

vdeki · 2nd March 2010, 07:16 AM

Yesterday I have changed the complete laser pickup with brand new and I found that the problem is not with grease .Still skips like one or two seconds with silence. I think maybe is something wrong with power supply. This I know because during play i plugged the night lamp in the power line and then skipped/silenced. Maybe the cd is sensitive on power fluctuation?
Tomorrow I'll post some pictures...

Mooly · 2nd March 2010, 07:27 AM

You need to look at the RF waveform from the pickup to be sure what's going on.
Where did you get the new laser from ?
Original Philips ones are very hard to come by and many of the cheap ones on offer are not good... so I wouldn't like to comment on that.

vdeki · 2nd March 2010, 07:50 AM

The new laser in made in China. Is it normal that old one and new one have the same problem? I think no. These skips are occasional maybe 4-6 times during play the whole cd.

Mooly · 2nd March 2010, 08:33 AM

The ones I have seen I'm afraid have been rubbish.
You'll find quite a few threads on this forum too, about the poor quality of CDM12.4's.

vdeki · 2nd March 2010, 01:09 PM

Can you please tell me what is the main problem with those made in china?

vdeki · 2nd March 2010, 04:24 PM

Today I wanted to take a picture of my CD players front and guess what. It reacts on flash of my camera. LOL.

Mooly · 2nd March 2010, 06:47 PM

Quote:

Originally Posted by vdeki

Can you please tell me what is the main problem with those made in china?

My experience of these (supplied in white cardboard package) has been of very low output. Others have been obviously pulled from old equipment... pickup dirty and dusty, yet fitted to a new chassis and motors etc.

Anatech is very experienced in CD theory and practice and his findings are summed up here, in post number 3
VAM1204 VAM1205 VAM1206 VAM1250 VAM1252 VAM1254 CDM12pro VAU1254=CDM12.4 compatib

vdeki · 2nd March 2010, 08:41 PM

Did they worked or not? Did you experienced difference in sound? Maybe problems with TOC? For now everything works fine.

Mooly · 3rd March 2010, 07:38 AM

The last one I got didn't work out of the box... the RF was low at around 0.8 volts pk pk.
I sent it back for refund.
Sound should not be affected unless the signal is so poor it either drops out or it's on the verge of causing the error correction to be audible.
Once it's playing th TOC has nothing to do with it... that info is read at the start and put into memory... it never has to be re read while the disc is in the machine.

26th February 2010, 06:28 PM	#21
Mooly diyAudio Member Join Date: Sep 2007	CDM12/4's have jumping and skipping included as standard Easy fix, but requires careful dismantling and removal of the gears and rack and all old grease washing off with iso etc. Use card to get every last bit from out of the teeth and reassemble using just a thin smear of suitable plastics grease. Vaseline etc is way to heavy. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

2nd March 2010, 07:27 AM	#23
Mooly diyAudio Member Join Date: Sep 2007	You need to look at the RF waveform from the pickup to be sure what's going on. Where did you get the new laser from ? Original Philips ones are very hard to come by and many of the cheap ones on offer are not good... so I wouldn't like to comment on that. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

2nd March 2010, 08:33 AM	#25
Mooly diyAudio Member Join Date: Sep 2007	The ones I have seen I'm afraid have been rubbish. You'll find quite a few threads on this forum too, about the poor quality of CDM12.4's. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

3rd March 2010, 07:38 AM	#30
Mooly diyAudio Member Join Date: Sep 2007	The last one I got didn't work out of the box... the RF was low at around 0.8 volts pk pk. I sent it back for refund. Sound should not be affected unless the signal is so poor it either drops out or it's on the verge of causing the error correction to be audible. Once it's playing th TOC has nothing to do with it... that info is read at the start and put into memory... it never has to be re read while the disc is in the machine. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

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2nd March 2010, 07:16 AM	#22
vdeki diyAudio Member Join Date: Oct 2009	Yesterday I have changed the complete laser pickup with brand new and I found that the problem is not with grease .Still skips like one or two seconds with silence. I think maybe is something wrong with power supply. This I know because during play i plugged the night lamp in the power line and then skipped/silenced. Maybe the cd is sensitive on power fluctuation? Tomorrow I'll post some pictures...

2nd March 2010, 07:50 AM	#24
vdeki diyAudio Member Join Date: Oct 2009	The new laser in made in China. Is it normal that old one and new one have the same problem? I think no. These skips are occasional maybe 4-6 times during play the whole cd.

2nd March 2010, 01:09 PM	#26
vdeki diyAudio Member Join Date: Oct 2009	Can you please tell me what is the main problem with those made in china?

2nd March 2010, 04:24 PM	#27
vdeki diyAudio Member Join Date: Oct 2009	Today I wanted to take a picture of my CD players front and guess what. It reacts on flash of my camera. LOL.

2nd March 2010, 08:41 PM	#29
vdeki diyAudio Member Join Date: Oct 2009	Did they worked or not? Did you experienced difference in sound? Maybe problems with TOC? For now everything works fine.

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