diykits.com.hk clock help - Page 3

nad · 14th November 2009, 01:11 PM

What is going on?????

The clock is powered by a 12v toroidal, the tcxo is getting 5vdc as it should, I've removed the 2 old oscillator caps to ground and the resistor, theres no solder splashes or dodgy soldering and the in/out is correct but when I power the player (NAD C515BEE) the transport goes crazy. Its spinning eratically and clicking as if it doesn't know what to do............

Any suggestions??

Anyone had problems with their diykits clock??

Bill Fuss · 14th November 2009, 01:21 PM

One question, where have you connected the new clock ground.

nad · 14th November 2009, 01:28 PM

Quote:

Originally Posted by Bill Fuss

One question, where have you connected the new clock ground.

there's only 2 output cables on the clock, 1 to the IC input and a return from the IC to the clock. Should there be a seperate ground?

Bill Fuss · 14th November 2009, 01:40 PM

The return is the ground, it is the ground plane on your new clock circuit. Foreign translations sometimes aren't clear. The return should be connected to a ground point close to the chip you are feeding the clock to, or the signal can get into other circuits.
Where do you have the return connected now.

nad · 14th November 2009, 01:44 PM

Quote:

Originally Posted by Bill Fuss

The return is the ground, it is the ground plane on your new clock circuit. Foreign translations sometimes aren't clear. The return should be connected to a ground point close to the chip you are feeding the clock to, or the signal can get into other circuits.
Where do you have the return connected now.

I replaced the old 2 pin oscillator with the clock, so I assumed the clock input/output goes to the same old positions?

Bill Fuss · 01:57 PM

No, the new clock is self contained, it takes no input from the chip. Connect the clock output to the Xin and the return to a ground near the chip. That's it. I'm hoping nothing is damaged.

I tried to look at the clock on their website but the page wont load.

nad · 14th November 2009, 02:20 PM

Quote:

Originally Posted by Bill Fuss

No, the new clock is self contained, it takes no input from the chip. Connect the clock output to the Xin and the return to a ground near the chip. That's it. I'm hoping nothing is damaged.

I tried to look at the clock on their website but the page wont load.

You're a GENIUS!!!!

Thanks for that, the disc reads perfect and the toc is correct.
The only problem now is I have no output????

I'll try rectify that in a mo............

Ta

nad · 14th November 2009, 03:39 PM

Well...............

The clock is working perfectly and spinning the disc and reading it correctly but there is now no output. I've checked nearly everything apart from the signal from the Toshiba TC94A54MFG-001 IC to the dac. How do I do this?? have I killed the toshiba??

Ta

Bill Fuss · 14th November 2009, 04:24 PM

I'm definitely not a genius. It might be toast, but probably not.
I could not find the chip's datasheet, but it is supposed to have built in DA converters. If you can find those output pins you could check it with a dmm. If you have an outboard DAC unit you could see if the spdif output is functioning. Otherwise, it will take an o-scope. Also worth noting, the chip is 3.3v,the clock is 5v. Check with the clock seller about the possible need for reducing the clock signal voltage.

Good luck, Bill

Bill Fuss · 14th November 2009, 04:30 PM

Also, if you still have the original parts you could reinstall them and check the operation before you go any further.

14th November 2009, 01:11 PM	#21
nad diyAudio Member Join Date: Oct 2009	Cant get it to work correctly! What is going on????? The clock is powered by a 12v toroidal, the tcxo is getting 5vdc as it should, I've removed the 2 old oscillator caps to ground and the resistor, theres no solder splashes or dodgy soldering and the in/out is correct but when I power the player (NAD C515BEE) the transport goes crazy. Its spinning eratically and clicking as if it doesn't know what to do............ Any suggestions?? Anyone had problems with their diykits clock??

14th November 2009, 01:54 PM	#26
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	No, the new clock is self contained, it takes no input from the chip. Connect the clock output to the Xin and the return to a ground near the chip. That's it. I'm hoping nothing is damaged. I tried to look at the clock on their website but the page wont load. Last edited by Bill Fuss; 14th November 2009 at 01:57 PM.

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14th November 2009, 01:21 PM	#22
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	One question, where have you connected the new clock ground.

14th November 2009, 01:40 PM	#24
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	The return is the ground, it is the ground plane on your new clock circuit. Foreign translations sometimes aren't clear. The return should be connected to a ground point close to the chip you are feeding the clock to, or the signal can get into other circuits. Where do you have the return connected now.

14th November 2009, 03:39 PM	#28
nad diyAudio Member Join Date: Oct 2009	Well............... The clock is working perfectly and spinning the disc and reading it correctly but there is now no output. I've checked nearly everything apart from the signal from the Toshiba TC94A54MFG-001 IC to the dac. How do I do this?? have I killed the toshiba?? Ta

14th November 2009, 04:24 PM	#29
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	I'm definitely not a genius. It might be toast, but probably not. I could not find the chip's datasheet, but it is supposed to have built in DA converters. If you can find those output pins you could check it with a dmm. If you have an outboard DAC unit you could see if the spdif output is functioning. Otherwise, it will take an o-scope. Also worth noting, the chip is 3.3v,the clock is 5v. Check with the clock seller about the possible need for reducing the clock signal voltage. Good luck, Bill

14th November 2009, 04:30 PM	#30
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	Also, if you still have the original parts you could reinstall them and check the operation before you go any further.

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