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31
Other DACs / Marantz CD12
« Last post by stevenvalve on July 02, 2018, 03:54:04 AM »
Picked this Marantz CD12 up and not via eBay. Its one of 2 CD players Ken Kessler still uses today and considers to be one the best of 100s of cd players he has reviewed. This one is mint and deliciously immaculate and all original except for Danny Digital replacing the sockets for the TDA1541A double crown and for the big A and B chips in the transport. He also went all over this machine with loving attention because he wants it badly and will eventually pry it of me because he just loves the quality vintage Marantz stuff and it does not come much more sought after than this. It sounds amazingly good in standard form and one wonders what it could be with some modifications, but i will leave it as is, because it is like new and i can not bring myself to butcher its originality. Only 5 where ever brought into Australia and i know where 2 others are today and of cause one is right here with me. Nice indeed
32
General Information / Re: Trouble Shooting Help
« Last post by mcb on June 16, 2018, 07:35:26 PM »
Thanks Steve,

Fully understand that it is no certainty that the chip is the issue, but lets hope that it is.

Murray
33
General Information / Re: Trouble Shooting Help
« Last post by stevenvalve on June 16, 2018, 05:02:25 PM »
Murray, Craig in Queensland will have them, or where to get them, get the number from Mario, But its no certainty that the chip is the problem, just a high probability.
34
General Information / Re: Trouble Shooting Help
« Last post by mcb on June 16, 2018, 12:33:53 PM »
Hopefully this is my last question on this subject, are there any known sources of the CS8414-CS chip in Australia or alternatively, reliable OS suppliers.  I have found some on EBay, but have no idea as to whether they are likely to be genuine.

Murray
35
General Information / Re: Trouble Shooting Help
« Last post by mcb on June 14, 2018, 08:04:16 PM »
Thanks very much for the clarification Steven.

I don't think anything was done with the ground pin.

Hopefully I now have enough info to make some progress.

Regards

Murray
36
General Information / Re: Trouble Shooting Help
« Last post by stevenvalve on June 14, 2018, 06:52:14 PM »
Yes, the big chip, you can see the tracks running off to the section that has the push on pins to change it to run SPDIF. Did you did connect the ground pin with a jumper as well. Sometimes the solder joints on the chip to board can be the problem. resoldering them sometimes works. This was a common problem with these older boards
37
General Information / Re: Trouble Shooting Help
« Last post by mcb on June 14, 2018, 06:25:16 PM »
Steven,

Thank you for the photo.

Just to clarify, is the chip that you are referring to, the bigger one with the legible numbers (CS8414-CS), or the smaller one above it and to the left.

Thanks

Murray
38
General Information / Re: Trouble Shooting Help
« Last post by stevenvalve on June 14, 2018, 05:51:35 PM »
Murray a picture tells a thousand words, This is most likely the offending chip, but it could be any number of related stuff, may be bad connection good luck.
39
General Information / Re: Trouble Shooting Help
« Last post by mcb on June 13, 2018, 12:50:03 PM »
Thank you for your reply Steven.

Seems like the best way forward it to try replacing the chip first. 

Do any of the techs you referred to reside in Perth?

Given that my board has a number of outboard caps connected to it, it will be a major exercise to take the board out and send it east. It is well past my ability to remove and resolder all the connections and I would be very reluctant to send the whole dac away.

So unless you know of any techs in Perth who are familiar with the KDac, I will see if the guy I saw can have a go, if I can provide him with details of the chip in question.  He was able to turn the board over without dislodging any of the wires and he has a massive light magnifying light.

If you can point me in the right direction as to either: i) a Perth based tech; ii)  the chip details; iii) who can advise me the chip details, it will be greatly appreciated.

Regards

Murray
40
General Information / Re: Trouble Shooting Help
« Last post by stevenvalve on June 12, 2018, 10:05:34 PM »
Murray I know quite a few techs around who own KDacs, i can put you on to them. There is a chip on the end of your board that handles the SPDIF  information and if damaged will need replacing. That chip is cheap, but it is a pain in the ass delicate job to replacing it, You need an fine fine tipped iron for the job and a good magnifying glass. Let me know if you want the board looked at, and i will give you the info. Paul or Craig can do the job no problem. Murray, i still have a brand new Scott board, all fitted and ready to go. It is a new spare i made for my DAC, i thought i may need it but that seems unlikely after all these years, it is a lot cheaper to fix yours and it is easy to fix. Its most likely the chip is the cause.
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