OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
Text excerpt from page 56 (click to view)
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7.4 CLEANING
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Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools: Portions to be cleaned CD pickup lenses Cleaning tools Cleaning liquid : GEM1004 Cleaning paper : GED-008