D-E666/EJ620/EJ621/EJ622/EJ623/EJ625/EJ626CK
DANGERSAFETY-RELATED COMPONENT WARNING!!
Invisible laser radiation when open and interlock failed or defeated.
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEAvoid direct exposure to beam.
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.CAUTION
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR INUse of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
SUPPLEMENTS PUBLISHED BY SONY.
exposure.
ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!Flexible Circuit Board Repairing
Y Keep the temperature of the soldering iron around 270°C during
repairing.LES COMPOSANTS IDENTIFI?S PAR UNE MARQUE 0 SUR LES
Y Do not touch the soldering iron on the same conductor of theDIAGRAMMES SCH?MATIQUES ET LA LISTE DES PIéCES
circuit board (within 3 times).SONT CRITIQUES POUR LA S?CURIT? DE FONCTIONNEMENT.
Y Be careful not to apply force on the conductor when soldering orNE REMPLACER CES COMPOSANTS QUE PAR DES PIéCES
SONY DONT LES NUM?ROS SONT DONN?S DANS CE MANUEL
unsoldering.
OU DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
Notes on chip component replacement
Y Never reuse a disconnected chip component.
Y Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SECTION 1
SERVICING NOTES
Laser Diode Checking Methods
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
During normal operation of the equipment, emission of the laser diodeBASE UNIT
is prohibited unless the upper panel is closed while turning ON the S801
The laser diode in the optical pick-up block may suffer electrostatic(push switch type).
breakdown because of the potential difference generated by the charThe following two checking methods for the laser diode are operable.ged
electrostatic load, etc. on clothing and the human body. During repair,
pay attention to electrostatic breakdown and also use the procedure inMethod :
the printed matter which is included in the repair parts.Emission of the laser diode is visually checked.
The flexible board is easily damaged and should be handled with care.1. Open the upper lid.
2. Push the S801 as shown in Fig. 1 .
NOTES ON LASER DIODE EMISSION CHECK3. Check the object lens for confirming normal emission of the laser
The laser beam on this model is concentrated so as to be focused on thediode. If not emitting, there is a trouble in the automatic power
disc reflective surface by the objective lens in the optical pick-up block.control circuit or the optical pick-up. During normal operation, the
Therefore, when checking the laser diode emission, observe from morelaser diode is turned ON about 2.5 seconds for focus searching.
than 30cm away from the objective lens.
Before Replacing the Optical pick-up Block
Please be sure to check thoroughly the parameters as per the OOptical
pick-up Block Checking Procedure� (Part No. : 9-960-027-11) issued
separately before replacing the optical Pick-up block.
Note and specifications required to check are given below.
Y FOK output : IC601 eg pin
When checking FOK, remove the lead wire to disc motor.
Y RF signal P-to-P value : 0.4 to 0.65Vp-p (Except US model)
: 0.35 to 0.65Vp-p (US model)
S801
Fig.1 Method to push S801
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ACEC
