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Shigaclone MKII Black - The builders Thread
Shigaclone MKII Black - The builders Thread
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Old 12th January 2015, 02:41 PM   #931
Prinz is offline Prinz  Netherlands
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Aleks,
Thank you for your comment. Hmm, i am not the first one to make this mistake.
I focussed on the pin numbers in this cable, i should have focussed to the what each wire does. 2 for spindle, 2 for sled, 2 for end switch.
At Friday i can work again on the system, i guess i am going to make it work next weekend. Thanks for the help,
Paul
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Old 13th January 2015, 12:27 AM   #932
Aleks1 is offline Aleks1  United Kingdom
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Paul,

I've had just about all the problems one can have with this project. Fortunately none of them damaged anything. It just took a few days to iron them all out.

Single biggest issue was my failure to clean all the flux off of the main board. I also had a short in the 6-way cable but this wasn't visible as the plugs had heatshrink over them. Took me a day to work that one out. Another was small PCB that is adjacent to the laser lense was slightly crooked and the lense therefore wasn't parallel to the disc or the laser led, that cost me 2 hours.

It all worked out in the end and I'm very happy with the result. I'll try and help if you have any other issues, as it's fresh in my mind. Hi rez pictures always help.

Have fun

Aleks
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Old 16th January 2015, 09:50 AM   #933
Prinz is offline Prinz  Netherlands
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Default Not enough solder....

Dear Aleks, Tibi and the others,
I solved the first issue, the large current flowing from the main regulator.
I removed the 4 pieces of 5V regulators to get back to a standard configuration. I still had a large current flowing when connecting the 16wire ribbon cable.
Then i started to measure some Voltages.
Vcc1 on pin 64 of the LA9242 was ok.
Vcc2 on pin 56 was ok also.
But... no Vr on pin 58. This should be 2.5V.
I turned the board upside down and made the picture, see attachment.
When looking on top, you can see it, only from the side, no solder...
After repairing it, i can put in the the 16wire ribbon cable, and things are stable.
Next step is to wire the 6wire cable for J2 and the transport visa versa.
Best regards, Paul
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File Type: jpg soldering.jpg (411.8 KB, 278 views)
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Old 17th January 2015, 09:48 PM   #934
Aleks1 is offline Aleks1  United Kingdom
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Hi Paul,

How's are things going now? I would be inclined to re solder all the pins on that I.C, some of them look marginal at best.

Have you got sweet music yet?

Aleks

Last edited by Aleks1; 17th January 2015 at 09:52 PM. Reason: typo
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Old 18th January 2015, 07:08 AM   #935
Prinz is offline Prinz  Netherlands
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Default Status report from Paul

Hi Alex, Tibi and the others,
I am still strugling, sorry to say.
1. I made a new 6pin cable between the transport and J2.
2. My back light on the display was not working and it took me ages to understand why. A. The ribbon cable supplied was 20 wires, and 18 had to be used. You have to remove 2 wires. I did not realise that because the 20 wire cable fits under the connector! See my provious pictures. But of course it doesn't work and it actually ruined my red connector. So i had to remove the red connector which was not so good for the PCB. I soldered the 18 wires directly on the PCB to avoid further issues. At least it works and the dispay shows 7n. (?)
3. I checked the frequency of the oscillator and it's working and fine.
4. I did a lot of cleaning to be sure that there are no issues there.
5. As you can see on the picture, i am using the build in regulator.

So status is:
A. The transport is silent. I can move the lens by hand, no force. Both motors for spindle and sled are not turning.
B. The ic's have a normal temperature, all 4x 5V + 2.5V ref are there.

What should i check more?
How can i start the system?
Should i check more voltages or frequencies?
Some help would be appreciated.
Best regards,
Paul
Attached Images
File Type: jpg DSCN3210.JPG (466.3 KB, 253 views)
File Type: jpg DSCN3211.jpg (1.02 MB, 241 views)
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Old 18th January 2015, 07:12 AM   #936
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Hi Paul,

I suggest you to resolder all three IC's and add little more lead.
From your display, I see that you have some pins not soldered on LC78601 as well.

Regards,
Tibi
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Old 18th January 2015, 01:02 PM   #937
Prinz is offline Prinz  Netherlands
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Default update Paul Sunday afternoon

Dear Tibi, Aleks and the others,
I have resoldered all 3 IC's. And i have tested 95% of the IC legs for conductivity. That is using a multimeter, one end on top of the ic leg, the other at the end of the pcb trace connected to it. I have seen no problems. I have added the result, please see the pictures.

I have tested conductivity between the LC78601 and the display. That is ok.

Results are:
A. Transport is silent.
B. Oscillator and Voltages and Uref are ok.

How can i isolate one part from another to test parts of the system. It is hard for me to understand where to continue searching.
What happens when the system starts up?

Thanks for the help already given.
Best regards,
Paul
Attached Images
File Type: jpg DSCN3212.JPG (459.8 KB, 226 views)
File Type: jpg DSCN3221.jpg (905.3 KB, 213 views)
File Type: jpg DSCN3235.jpg (1,005.0 KB, 69 views)
File Type: jpg DSCN3243.jpg (980.7 KB, 56 views)
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Old 18th January 2015, 03:03 PM   #938
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Paul,

As long your display do not properly shows digits, this indicate that LC78601 is not properly soldered, either ribbon cable was not properly crimped.

Measuring with multimeter will not indicate a bad solder joint because you had to push the pin toward PCB when you take measurement and this may make contact.

At power on the unit will search for CD toc, but for this a reset must be initiated and therefore J3 - cd door - cable must be in place and properly connected, otherwise the unit will stay "silent".

Regards,
Tibi
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Last edited by tvicol; 18th January 2015 at 03:06 PM.
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Old 18th January 2015, 11:46 PM   #939
Aleks1 is offline Aleks1  United Kingdom
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Paul,

I know you said you made a new 6 way cable, but in the photo above it's still shown in reverse.

If you have corrected this, sorry for repeating myself.

Aleks
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Old 19th January 2015, 05:55 AM   #940
Prinz is offline Prinz  Netherlands
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Default Feedback on Tibi and Aleks' comments

Dear Tibi, Aleks and the others,

I am only able to work on the project in the weekend, as i am travelling at the moment. So next week i can continue.

1. Tibi, maybe you are right about the multimeter, i'll check. I must say that i checked the ic by pushing down the pins with my fnger and looking on the display. Nothing changed on the display. I have used Danzup's method of using relatively a lot of solder, creating many short cuts. Then using the desoldering braid to remove the solder. The braid is removing maybe too much, i don't know.

2. About the CD door, i'll look in the ic datasheet how to cable this connector J3. Thanks for make me understand that it is required is cable it, leaving it as it is doesn't work.

3. Aleks: i have made a fool of my self, i repeated my mistake. I'll make the correct cable next weekend. I am consequently connecting pin 1 to pin 1 , that is my logic, which is wrong.

Thanks guys for all the help, best regards,
Paul
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