Marantz CD-60 only POP :-) - diyAudio
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Old 4th October 2004, 09:56 AM   #1
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Unhappy 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
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Old 5th October 2004, 11:31 PM   #2
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Replacing the laser seems to be the solution.
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Old 8th October 2004, 02:42 PM   #3
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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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