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Shigaclone MKII Black - The builders Thread
Shigaclone MKII Black - The builders Thread
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Old 8th April 2018, 08:47 AM   #1781
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Quote:
Originally Posted by pchw View Post
Hey,

Since I have Tibi's Shiga reborn, I also plan to give the original (JVC) Shigaclone to my brother. There seems to be somewhat tight space between the laser and the board. Do you happen to have some pictures of the laser mods in the original Shigaclone?

Thanks!!
Modifications are the same. Follow this thread and you'll get all relevant info.

Regards,
Tibi
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Old 8th April 2018, 08:51 AM   #1782
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
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Originally Posted by TIC37 View Post
To BMW850, did you ever get this sorted out??

I have noticed the same sound coming from my Shiga but it seem to be static electricity but I can't pin point why and how....
This issue may be related to ground loop, digital out is reversed (ground with signal), one of V1..V4 regulators is oscillating. Add 47uF - 100uF after regulators.

Regards,
Tibi
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Old 8th April 2018, 08:53 AM   #1783
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Quote:
Originally Posted by TIC37 View Post
I have done the moddings recommended and all the time I have been positively surprised but today I hit rock.
I installed V3 and V4 with lt 1085-50 and the whole sound image changed, from a solid wall that has only gotten wider and bigger by every change, into the speakers. What a bummer!
I hope it will change back to the wide room again when it has been running for a number of hours but it was a real disappointment for ones.
I don't know if it will improve if I change V1 and V2 also but I get that impression from what they are regulating.
Tomorrows work, now si work all night.
There is a big chance that your LT1085-5 oscillate. Add on the regulator pins 100uF/6.3V oscon/polymer or tantal.


Regards,
Tibi
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Old 8th April 2018, 05:29 PM   #1784
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Quote:
Originally Posted by tvicol View Post
... Add on the regulator output pins 100uF/6.3V oscon/polymer or tantal.


Regards,
Tibi
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Old 8th April 2018, 07:35 PM   #1785
hartbigsky is offline hartbigsky  United States
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Hi Tibi and all builders,
New issue. I had issues arising from CD ribbon cable connector on start up. It had a very box shaped and I thought it was just a more enclosed FFC connector. Wrong! So I had another unmodified deck that was definitely FFC. It works! Had a full day of normal operation. But now the deck is shutting itself off after a minute or so of playing like the off switch was hit. Goes to home and displays number of tracks. Will start replaying with start. Also outer tracks having tracking issues also. Ribbon cable I surmise. My original breadboard was off 3 ribbon slots so I re-aligned, I have tried lots of height adjustments from PCB to deck, and many distances between them. 3 different cables also. I have ordered some new molex premo extra flex FFC. Any other ideas what may be causing this behavior?? Made a new motor cable also just for completeness. Stock unmodified deck. Thanks for any input!

best regards,
Steve
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Old 8th April 2018, 07:42 PM   #1786
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
Hi Steve,

Can you post some pictures, or make a small video ?

regards,
Tibi
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Old 14th April 2018, 12:26 AM   #1787
TIC37 is offline TIC37  Sweden
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Tibi,

I have a question that I don't find the answer to in direct words so could you please help out.

I tried playing a HDCD this evening but the Shiga Black MkII refused to read TOC on this HDCD. I understand that the Quantum is playing all formats both HDCD, SACD and so on, is there any difference in the Quantum towards the Shiga Black MkII that I have regarding CD Formats??
I understood that the Shiga also read all formats and if yes, then come the second question, why do my Shiga refuse to play my HDCD??

By the way, I did change all V1 to V4 and added some 100 uF tantalum to all regs and now I am happy, sound is refined and back to "normal" with the whole 3D stage again and yes, it was missing the tantalums. Most likely I had oscillations in one, two or all of the regulators but not any longer.
It is time to aquire an oscilloscope cause I am not able to see such things but I do hear them.
Last step is to get the Tentlab clock and feed it from a Reflektor D instead of the LT1085 and get a deasent C8 Cap. I took what I had at home to put the Shiga together so I could start evaluating it but I only had older type Clarity caps at home and of cause only 0.22 uF so I had to put two of them in serie to get 0.11 uF, close enough to the stipulated 0.1 uF Mundorf so I will most likely gain a little more music from a Cap change also but I am over all very happy with my new toy.
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Old 14th April 2018, 05:50 AM   #1788
tvicol is offline tvicol  Europe
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Shigaclone MKII Black - The builders Thread Shigaclone MKII Black - The builders Thread
There are some consistent differences between Quantum and Shiga, but both will read same formats.
HDCD decoding is made in DAC, not transport.
If your DAC is capable of HDCD decoding, than you'll hear it.
Check if your disk is scratched at TOC, or is dirty.
An work around is to use a disk that have at least same number of tracks as your HDCD and the TOC is read by Shiga. Than play your HDCD without pressing the TOC.

Regards,
Tibi
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Old 15th April 2018, 01:02 AM   #1789
hartbigsky is offline hartbigsky  United States
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Hi Tibi,
So in trying to figure out why my disc just stops I have been monitoring LDD at 2N4403 and I am observing that the voltage drops slowly all the time. So I have swing to turn laser on and I have 4.75 after TOC and 2.763 vdc to play. This voltage drops to 2.62 range and player stops. Now I have 4.4 vdc TOC 2.63 vdc to play, and 2.63 starts dropping. This cycle just continues so I watched vdc at idle and they keeping dropping also. Should I replace this transistor or is it secondary to some other event? PS stays rock solid at 5.08 Vdc. Work has kept me from having time to get images I will try to get some to you. Thanks!

best regards,
Steve
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Old 15th April 2018, 03:39 AM   #1790
sthcoaster is offline sthcoaster  United Kingdom
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Shigaclone MKII Black - The builders Thread
Quote:
Originally Posted by tvicol View Post
Hi Steve,
Yes, the board will work just fine with AD151-2,5V reference in place, but will not bring expected sonic improvement.
You need to mount only U5 and C69, cut the U5 output trace immediately after U5 output. Remove L1 bead and grab a wire from U5 output to C11. On C11 mount a 10uF tantalum or oscon in parallel with a good quality 1Kohm resistor - preferably a metal foil one.
This mod will provide a very clean 2,5V reference to pin detector.
You'll love instrument extension and decay after this mod.
Quantum ultra high-grade have this mod inside, It was compared with players above 18000eur and now used as reference along some very big names.

Regards,
Tibi
Greetings Tibi

Just playing with my toys again. Now have Dueland Cu foil in C8 and finally got the smd resistors so that I could implement the LT1086-adj in the PSU.

Also have parts for this ADP151 mod.

Currently C11 is 1nf silver mica.

From the earlier post describing this mod you give C11 now 10uf tant in parallel with 1k metal film. So take out 1nf silver mica?

Which side of C11 should U5 output go? Next to L1 or next to C69?

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