Marantz CD-60 only POP :-)
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... :confused:
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,
Replacing the laser seems to be the solution.
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.
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