Sony gv a 500 service manual

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SAFETY-RELATED COMPONENT WARNING"

COMPONENTS IDENTIFIED IY MARK A OR DO'ITED LINEWITH
MARK A ON THE SCHEMATIO 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 BV SONY.

ATI'ENTION Au COMPOSANT AYANT RAPPORT
A LA sécumréi

LES COMPOSANTS IDENTIFEs PAR uNE MAROUE A suR LEs
DIAGRAMMES SCHEMATIQUES ET LA LISTE DEs PIECES som
camoues POUR LA sEcuarrE DE FONCTIONNEMENT. NE
REMPLAcER ces COMPOSANTS QUE PAR DEs PIESEs sonv
DONT LEs NUMERos som' DONNEs DANS CE MANUEL ou
DANs LEs SUPPEMENTS PUBLIES 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 yourrepair 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 replace-mam.

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.