BBK DK1020S, Руководство по обслуживанию

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1.1 Safety precautions
1.1.1Power supply
1.1.2Precautionsforantistatic
Whenmaintenancepersonnel arerepairingDVD players, h e s h o u l d p a y s p e c i a l a t t e n t i o n t o the
powerboardwith220VACand330VDCwhichwillcausehurtanddamage topersons!
Movementandfriction willbothbringstatic electricitywhichcauses seriousdamagesto integrated
IC. Though static charge is little, when a limited quantity of electric c h a r g e is added to large-scale
integratedIC,asthecapacitanceisverysmallinthemeantime,nowtheintegratedICisverymucheasy
to be struck through by static electricity or the performance will decrease. Thus static electricity
prevention is of extraordinary importance. The following are several measures to prevent static
electricity:
1.Useapieceofelectricconductionmetalwiththelengthofabout2metrestoinsertintotheearth,
and fetch t h e l e a d w i r e f r o m t h e t o p o f t h e s u r p l u s m e t a l a n d c o n n e c t t o therequiredstaticelectricity
device.Thelengthanddepthofthemetalembeddedundertheearthshouldbedeterminedaccordingto
thewettabilityofthelocalsoil.Forhumidplaces,itmaybeshorter,andlongeranddeeperfordryplaces.
Ifpossible,itcanbedistributedandlayed i n t e r m s o f “#”shape.
2.Onoperatingtabl e-board,theantistatictablecushionshouldbecoveredandgrounded.
3.Alldevicesandequipmentsshouldbeplacedontheantistatictablecushionandgrounded.
4.Maintenancepersonnelshouldwearantistaticwristringwhichshouldbegrounded.
5.Placesaround the operating positionshouldalsobecoveredwith electricconduction cushion o r
paintedwithantistaticpaint.
1. D o n o t s t a r e a t l a s e r h e a d d i r e c t l y , f o r l a s e r emission will occur when laser head is working,
whichwillhurtyoureyes!
2.Donotusewipingwateroralcoholtocleanlaserhead,andyoumayusecottonswab.
1.1.3 Precautionsforlaserhead
Chapter One About Maintenance
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