Denon RCD-M38DAB - Laser Pick-up Handling and Replacement; Laser Pick-up Precautions

17
NOTE HANDLING AND REPLACEMENT OF THE LASER PICK-UP
1. Protection of the LD
Short 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nishedmechanism(priortoanchoringintheset)shouldbeprotectedagainststaticelectricityanddust.
The mechanism must be stored that damaging outside forces are not received.
•Whencarryingthenishedmechanism,holditbythechassisbody
•Forproperoperation,storageandoperatingenvironmentshouldnotcontaincorrosivegases.ForexampleH2S,SO2,
NO2,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
•ChecktheIop(Laserdrivecurrent).Checklopin"SERVICEMODE".(Referto24page.)
•IfthepresentIop(current)valuebecomesmorethan50mA,replacetheTraverseunitwithanewone.
•Nomechanicaladjustmentisnecessaryafterthereplacement.
Protective soldering place for laser diode.