CDX-757MX
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-DISC MAGAZINE GETTING OUT PROCEDURE
ON THE POWER SUPPLY IS OFF
UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-Remove the CASE (LOWER. T) beforehand
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.1) Press the lever (ML.S) assy in the direction of arrow A.
2) Removal the magazine assy.
During repair, pay attention to electrostatic breakdown and alsoNote: Take out the magazine only when the tray is completely within the
use the procedure in the printed matter which is included in themagazine. If the disk or tray is sticking out, turn on the power and
repair parts.eject the magazine.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECKLever (ML.S)
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
A
US/Canadian model:
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
Magazine assy
OPTICAL
PICK-UP
BLOCK
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Flexible Circuit Board Repairing
YKeep the temperature of the soldering iron around 270 uC dur-
SEMI-FIXEDing repairing.
RESISTORY Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
Y Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
YNever reuse a disconnected chip component.
Y Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
LES COMPOSANTS IDENTIFI?S PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCH?MATIQUES ET LA LISTE
DES PIéCES SONT CRITIQUES POUR LA S?CURIT?
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIéCES SONY DONT LES
NUM?ROS SONT DONN?S DANS CE MANUEL OU
DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
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ACEC
