SONY XTV70
Manual de Servicio

XT-V70

TABLE OF CONTENTS 1. 2. 3. 4. SERVICING NOTES ................................................ 3 GENERAL ................................................................... 4 ELECTRICAL ADJUSTMENTS .......................... 7 DIAGRAMS
9 10 12 13 14 4-6. Schematic Diagram � TV Section (1/3) � (Russian model only) ...................................................... 4-7. Schematic Diagram � TV Section (2/3) � (Russian model only) ....................................................... 4-8. Schematic Diagram � TV Section (3/3) � (Russian model only) ...................................................... 4-9. Printed Wiring Boards � TV Section (1/2) � (Russian model only) ....................................................... 4-10. Printed Wiring Board � TV Section (2/2) � (Russian model only) ....................................................... 15 16 17 18 19

4-1. Block Diagram (Except Russian model) ......................... 4-2. Block Diagram (Russian model only) ............................. 4-3. Printed Wiring Boards � TV Section (1/2) � (Except Russian model) ................................................... 4-4. Printed Wiring Board � TV Section (2/2) � (Except Russian model) ................................................... 4-5. Schematic Diagram � TV Section � (Except Russian model) ...................................................

5. 6.

EXPLODED VIEW ................................................... 27 ELECTRICAL PARTS LIST ................................ 28

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 viscou-s (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.

Notes on chip component replacement � Never reuse a disconnected chip component. � Notice that the minus side of a tantalum capacitor may be damaged by heat. 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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