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Old 19th March 2013, 10:17 AM   #6951
tvicol is offline tvicol  Romania
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Quote:
Originally Posted by pchw View Post
...
  1. This is the most important that got all my transport to work. When you look at the laser pickup with the 16 pin connector facing you, there is a pot at the lower right corner. It is a VR that connects the pins 11 and 12. It is used to adjust the laser. In my first try, I turned this clockwise 180 degree, and the transport started reading a pressed CD toc but not a CDR. I turned the pot 90 degress more, still no dice to the CDR. I then turned the port counter clockwise 180 degress (net effect was 90% clockwise). The CDR's toc was also displayed. If your transport has the right table height and not reading anything, give this a try.
  2. They are all made in China, just kidding to see you read this far
Now all my transports are working!!
The best way to adjust that pot, is to look at eye pattern with an oscilloscope.
LA9242M pin 41 and rotate the pot till you get a very clean eye pattern.

Regards,
Tibi
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Old 19th March 2013, 12:21 PM   #6952
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Quote:
Originally Posted by tvicol View Post
All these mechanics are made by various Chinese manufacturers.
It is very hard to tell which one is the best.
Have a look in the mechanic datasheet and youŽll see that there are various options for optics and motors on the same manufacturer.
http://www.vicol-audio.ro/docs/DA11VZ.pdf
For spindle/sled motor you may have one of these:
MABUCHI MOTOR Co., Ltd.
RF-310TC
MABUCHI MOTOR Co., Ltd.
2418OPA
SANYO Seimitsu Co., Ltd.
KRF-310TA-11400-38L
SHENZHEN BAOAN
KAIDA MICRO-MOTOR

For laser you may have:
SANYO DL-3150-101
ROHM RLD78MYA1

For pin diodes you may have:
NEC: PH901
MITSUMI: MM1597XB
KODENSHI: PIC–6710
Capella: CM1286

and I bet there are few more options as well.


Regards,
Tibi
Okay, but I guess I'm not sure if I should be asking for a replacement for this one that doesn't seem to work.
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Old 19th March 2013, 12:23 PM   #6953
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Originally Posted by tvicol View Post
Yep, this is eye pattern and looks very good.

Regards,
Tibi
Whew! But that looks good? I thought it looked a little fuzzy (my scope traces are normally very clean). I'd love to see what bad looks like!
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Old 19th March 2013, 12:28 PM   #6954
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Originally Posted by tonyptony View Post
Sigh. I was afraid of this.



So, uncle_leon, if there are more of us crazy enough to want to buy those Invisistors, have you setlled on the optimal configuration and values?
uncle_leon, if you're out there please advise. Now that I'm building the enclosure for my first Shiga I'm completing the collection of parts for my custom. Would like to get your Invisistor analysis so I know what to buy.
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Old 19th March 2013, 01:09 PM   #6955
tvicol is offline tvicol  Romania
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Originally Posted by tonyptony View Post
Okay, but I guess I'm not sure if I should be asking for a replacement for this one that doesn't seem to work.
No problem, please send me a mail and IŽll send you another one at shipping cost.

Regards,
Tibi
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Old 19th March 2013, 01:14 PM   #6956
tvicol is offline tvicol  Romania
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Originally Posted by tonyptony View Post
Whew! But that looks good? I thought it looked a little fuzzy (my scope traces are normally very clean). I'd love to see what bad looks like!
The wave-shape must clear and clean.
The more favourable the output characteristics are, the clearer and better the wave-shape is.

For example a jittery one
Click the image to open in full size.



Regards,
Tibi
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Old 19th March 2013, 01:49 PM   #6957
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Originally Posted by tvicol View Post
The wave-shape must clear and clean.
The more favourable the output characteristics are, the clearer and better the wave-shape is.

For example a jittery one
Click the image to open in full size.



Regards,
Tibi
Thanks. Having trouble seeing the image.
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Old 19th March 2013, 01:53 PM   #6958
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Originally Posted by tvicol View Post
No problem, please send me a mail and IŽll send you another one at shipping cost.

Regards,
Tibi
PM sent.
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Old 19th March 2013, 10:33 PM   #6959
pchw is offline pchw  United States
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Quote:
Originally Posted by tvicol View Post
The best way to adjust that pot, is to look at eye pattern with an oscilloscope.
LA9242M pin 41 and rotate the pot till you get a very clean eye pattern.

Regards,
Tibi
I wish I had a o-scope So, it was a bit of small turn/trial and error kind of tweak, but it still beats the 00 no TOC big time

Last night, I played over 5 different CDR's. All read to the end. I did put a mark on pot and the pcb to indicate where I started. So I will be dialing back until it stops reading in the days to come. At the moment, I would rather enjoy listening than continue to tweak

Thanks for the support!!
__________________
- Fred -
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Old 20th March 2013, 12:39 AM   #6960
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Quote:
Originally Posted by tvicol View Post
The wave-shape must clear and clean.
The more favourable the output characteristics are, the clearer and better the wave-shape is.

For example a jittery one
Click the image to open in full size.



Regards,
Tibi
Had to get home before I could see the image. So do you have a trace for a nice, non-jittery one?
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