CECTL53Z CD Player CRACKLING NOISE

[Mohan Siribadda]

Can anyone help me to get over the crackling noise present in my CEC TL53Z cd player. I bought this CD player from Taiwan four months back.

Recently when playing a CD, it has developed crackling noise through the speakers. In order to be sure that the problem lies in the CD player, I swapped the cd player with my Marantze cd player. Through Marantze the crackling noise was present. Additionally, I checked all the peripheral equipment including the plugs and interconnects and found nothing abnormal.

The other observation was, when I used the optical out-put CEC during play back the crackling noise was not present. When switched over to the balance output or the RCA phono output the crackling noise appears.

I hope great DIYAudio freiends can help me to find a solution to over come this problem.

[Mooly]

You say the TL53Z crackles.

Then you say you swapped for Marantz... and you say "Through Marantze the crackling noise was present"
so that means it's something other than the CD players.

Start again and be clear what you mean

If you mean it's just the TL53 that crackles, then does it do it on both left and right phono outputs ?

[Mooly]

I googled your player and found this,
6moons audio reviews: C.E.C. TL53Z

If it is a fault on one channel then try swapping those large red "modules" over. They look as though they plug in, and that they will be the same... but check numbers on them first.

[Mohan Siribadda]

I am sorry, I have given you a wrong information. When I swapped CEC with Marantz CD player, the crackling noise was not there. Similarly, when I use the digital optical out of CEC TL53Z via an external dac the crackling noise disappeared. Then half way during playback I changed the output to balance XLR, then the crackling noise was present from both the channel. Through Phono RCA also the same noise was present.

Does this mean, the CEC's DAC's analog circuit has some problem?

Please advise me, how should I get this rectified

[Mohan Siribadda]

Further to my earlier email, I was asked by CEC Japan to change the two condensers in DAC with 47PF.

The detail of the DAC is given below:https://mail.google.com/mail/?ui=2&i...ication/pdf&zw

[Mooly]

So are CEC advising these two caps will correct the problem ? or have you already done that and the problem remains.
Your link goes to GMail home page. You can post the pdf ? if that's what it is using the advanced button on here, or post a .jpg of the DAC using the same.
For both channels to be affected might mean the problem is before the DAC's... it's very hard to say without seeing it and checking a few things.

[Mohan Siribadda]

I have not yet carried out the rectification as CEC suggested

[Mohan Siribadda]

Hi!

I am attaching the image, I hope it will be clear.

[Mohan Siribadda]

What you say is when the noise affects the both channel, the problem may be before the dac. As I said, through digital out put (SPD/IF) via external dac it was working perfectly. No cracking nosie. When I play through the analog out puts (XLR or RCA) the problem persists.

Does that mean it is in the analog side of the dac. I am not an expert, I need your kind advise.

[stephensank]

It seems you are saying crackle is same in both left & right channel outputs. Therefore, the fault must either be BEFORE the PCM1792 dac chips, or in the power supply.
I think the power supply is the first place to look for trouble. Since the player, sadly, uses a switchmode power supply(and god knows how they get away with having a large SMPS unshielded & right next to the audio circuitry), there is considerable 'stress' on the electrolytic capacitors in that supply, as they need to deal with very large amounts of 100kHz noise. Unless you can find a schematic, or can otherwise identify which capacitors are involved with the supply voltages for the dacs & output stages, and since the crackling noise is very unlikely to indicate and capacitors bulging or leaking(i.e., the cap causing the fault will quite certainly have a completely normal appearance), the only efficient way to eliminate caps as the cause of the problem is to simply replace ALL of the electrolytic caps in the output side of the SMPS power board, preferrably with Nichicons. There is a smaller chance that the crackling may be caused by a bad diode or regulator IC/transistor in the supply, but caps are more likely.