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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.

Denon RCD-M38DAB Service Manual

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