Marantz CD-60 only POP :-)

seppstefano · 4th October 2004, 08:56 AM

Hi all,
a dear friend of mine has a Marantz CD-60 with reading problems. It keeps on skipping, ticking and popping while playing. The lens seems clear enough (i'll clean it better), but I fear the problem is located in another place...

Perhaps the laser is burnt out? The power supply???

Please, share any suggestion and (if possible) Cd-60 technical schema, too :-)

TIA for any help,

Stefano

jean-paul · 5th October 2004, 10:31 PM

Replacing the laser seems to be the solution.

Extreme_Boky · 8th October 2004, 01:42 PM

Hi Seppstefano,

Check your PCB and look for a point labelled RF. Monitor the RF signal on oscilloscope and look for an eye-pattern. It should be 1.5(+ or - 0.3) Vp-p. If it is lower than 1.2V you'll have the problem where the pick-up reads some disks, and does not read ones with low reflectivity. You can increase the laser output by adjusting the little trim-pot located on the pickup itself. Do not go over 1.7 - 1.8 volts.

Regards,
Extreme_Boky

4th October 2004, 08:56 AM	#1
seppstefano diyAudio Member Join Date: Jan 2004 Location: Italy, Genova	Marantz CD-60 only POP :-) Hi all, a dear friend of mine has a Marantz CD-60 with reading problems. It keeps on skipping, ticking and popping while playing. The lens seems clear enough (i'll clean it better), but I fear the problem is located in another place... Perhaps the laser is burnt out? The power supply??? Please, share any suggestion and (if possible) Cd-60 technical schema, too :-) TIA for any help, Stefano

5th October 2004, 10:31 PM	#2
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: The Netherlands	Replacing the laser seems to be the solution. __________________ It's only audio

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8th October 2004, 01:42 PM	#3
Extreme_Boky diyAudio Member Join Date: Dec 2003 Location: Sydney	Hi Seppstefano, Check your PCB and look for a point labelled RF. Monitor the RF signal on oscilloscope and look for an eye-pattern. It should be 1.5(+ or - 0.3) Vp-p. If it is lower than 1.2V you'll have the problem where the pick-up reads some disks, and does not read ones with low reflectivity. You can increase the laser output by adjusting the little trim-pot located on the pickup itself. Do not go over 1.7 - 1.8 volts. Regards, Extreme_Boky

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