Denon DCD-F107 Service Manual

Also see for DCD-F107: Owner's manual Owner's manual

Contents

10DCD-F107Note Handling and Replacement of the Laser pick-up1. Protection of the LDShort a part of the LD circuit by soldering. After connection to a circuit, remove the short solder.2. Precautions when handling the laser CD mechanism• Handle the laser pick-up so that it is not exposed to dust.• Do not leave the laser pick-up bare. Be sure to cover it.• If dust adheres on lens of the pick-up, blow it off with a blower brush.• Do not shock the laser pick-up.• Do not watch the light of the laser pick-up.3. Cautions on assembling and adjustment• Be sure that to the bench, jig, head of soldering iron (with ceramic) and measuring instruments are well grounded.• Workers who handle the laser pick-up must be grounded.• The finished mechanism (prior to anchoring in the set) should be protected against static electricity and dust. The mecha-nism must be stored that damaging outside forces are not received.• When carrying the finished mechanism, hold it by thechassis body• For proper operation, storage and operating environment should not contain corrosive gases. For example H 2 S, SO2 , NO 2 ,CI2 etc. In addition storage environment should not have materials that emit corrosive gases especially from silicic, cyanic,formalin and phenol group. I the mechanism or the set, existence of corrosive gases may cause no rotation in motor.4. Determining whether the laser pick-up is defective• Measure the waveform at RFO-VC on "MCU PCB Unit ".( For measuring points and waveforms, see pages 26, 27.)• The laser pick-up is OK if the amplitude level of the measured RFO waveform is between 0.4 and 1.1 Vp-p, defective oth-erwise.Protective soldering place for laser diode.