ENGLISHENGLISHJAPJAPANESEANESE
There are two types of the MD board of this model.
One is the MD-114 board and the other is the MD-120 board.
Method of identifying the two different MD boards is shown on page 6.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.
1.Check the area of your repair for unsoldered or poorly-solderedUnleaded solder
connections. Check the entire board surface for solder splashesBoards requiring use of unleaded solder are printed with the lead-
and bridges.free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
2.Check the interboard wiring to ensure that no wires are
the lead free mark due to their particular size.)
"pinched" or contact high-wattage resistors.
3.Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair : LEAD FREE MARK. Point
them out to the customer and recommend their replacement.Unleaded solder has the following characteristics.
4.Look for parts which, through functioning, shoYw obUnleaded solder melts at a temperature about 40vious signs°C higher than
of deterioration. Point them out to the customer andordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
recommend their replacement.applied to the solder joint for a slightly longer time.
5.Check the B+ voltage to see it is at the values specified.
Soldering irons using a temperature regulator should be set to
6.Flexible Circuit Board Repairingabout 350°C.
Y Keep the temperature of the soldering iron arCaution: ound 270uCThe printed pattern (copper foil) may peel away if the
during repairing.heated tip is applied for too long, so be careful!
Y Do not touch the soldering iron on the same conductor of theY Strong viscosity
circuit board (within 3 times).Unleaded solder is more viscous (sticky, less prone to flow) than
Y Be careful not to apply force on the conductor when solderingordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
or unsoldering.
Y Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
SAFETY-RELATED COMPONENT WARNING!!ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITHLES COMPOSANTS IDENTIF?S PAR UNE MARQUE 0 SUR LES
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSDIAGRAMMES SCH?MATIQUES ET LA LISTE DES PIéCES SONT
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECRITIQUES POUR LA S?CURIT? DE FONCTIONNEMENT. NE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERSREMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSDONT LES NUM?ROS SONT DONN?S DANS CE MANUEL OU
PUBLISHED BY SONY.DANS LES SUPP?MENTS PUBLI?S PAR SONY.
CAUTION :
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
WARNING!!CAUTION:
The use of optical instrument with this product will increase eye
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IShazard.
NECESSARY TO CONFIRM LASER BEAM EMISSION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
CAUTIONTHAN 30 cm FROM THE SURFACE OF THE
Use of controls or adjustments or performance
OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK.
procedures other than those specified herein may
result in hazardous radiation exposure.
DCR-DVD202E/DVD203/DVD203E/DVD703/DVD703E
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