DCR-SR58E, DCR-SR68, DCR-SR68E, DCR-SR78E, DCR-SR88, DCR-SR88E (serv.man2) - Sony Movie Service Manual (repair manual). Page 4

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DCR-SR58E/SR68/SR68E/SR78E/SR88/SR88E_L2
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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 
PUBLISHED BY SONY. 
ATTENTION AU  COMPOSANT  AYANT  RAPPORT 
À  LA  SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 
0 SUR LES 
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT 
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE 
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY 
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU 
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
Caution
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Dispose of used batteries according to the instructions.
Unleaded solder
Boards requiring use of unleaded solder are printed with the leadfree 
mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with 
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•   Unleaded solder melts at a temperature about 40°C higher than 
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to 
about 350°C.
Caution:  The printed pattern (copper foil) may peel away if the 
heated tip is applied for too long, so be careful!
•   Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than 
ordinary solder so use caution not to let solder bridges occur such 
as on IC pins, etc.
•   Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.
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-soldered 
connections. Check the entire board surface for solder splashes 
and bridges.
2.  Check the interboard wiring to ensure that no wires are “pinched” 
or contact high-wattage resistors.
3.  Look for unauthorized replacement parts, particularly transistors, 
that were installed during a previous repair. Point them out to 
the customer and recommend their replacement.
4.  Look for parts which, through functioning, show obvious signs 
of deterioration. Point them out to the customer and recommend 
their replacement.
5.  Check the B+ voltage to see it is at the values specified.
6.  Flexible Circuit Board Repairing
 
•   Keep the temperature of the soldering iron around 270°C 
during repairing.
 
•   Do not touch the soldering iron on the same conductor of the 
circuit board (within 3 times).
 
•   Be careful not to apply force on the conductor when soldering 
or unsoldering.
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