Table for differences of function
ModelDSC-P30DSC-P50
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SAFETY-RELATED COMPONENT WARNING!!ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMSLES COMPOSANTS IDENTIFI?S PAR UNE MARQUE 0
AND IN THE PARTS LIST ARE CRITICAL TO SAFE SUR LES DIAGRAMMES SCH?MATIQUES ET LA LISTE
OPERATION. REPLACE THESE COMPONENTS WITHDES PIéCES SONT CRITIQUES POUR LA S?CURIT?
SONY PARTS WHOSE PART NUMBERS APPEAR ASDE FONCTIONNEMENT. NE REMPLACER CES COM-
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-POSANTS QUE PAR DES PIéCES SONY DONT LES
LISHED BY SONY.NUM?ROS SONT DONN?S DANS CE MANUEL OU
DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
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-sol-UNLEADED SOLDER
dered connections. Check the entire board surfBoards requiring use of unleaded solder are printed with the lead-ace for solder
splashes and bridges.free mark (LF) indicating the solder contains no lead.
2. Check the interboard wiring to ensure that no wires are(Caution: Some printed circuit boards may not come printed with
Opinched� or contact high-wattage resistors.the lead free mark due to their particular size)
3. Look for unauthorized replacement parts, particularly transis-
tors, 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, though functioning, shoYw obUnleaded solder melts at a temperature about 40 uC higher thanvious signs
of deterioration. Point them out to the customer and recom-ordinary solder.
mend their replacement.Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board RepairingSoldering irons using a temperature regulator should be set to
about 350 uC .
Y Keep the temperature of the soldering iron around 270 uCCaution: The 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 ofY Strong viscosity
the circuit board (within 3 times).Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur
Y Be careful not to apply force on the conductor when sol-such as on IC pins, etc.
dering 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.
� 2 � |
ACEC
